/* roulang page: index */
:root{
  --bg-a:#070C14;
  --bg-b:#0C1526;
  --teal:#2FD8B6;
  --teal-hover:#3FE3C2;
  --teal-soft:rgba(47,216,182,.12);
  --dawn:#FF9A3C;
  --c-title:#EAF1F8;
  --c-text:#C6D3E1;
  --c-muted:#8FA1B6;
  --line:rgba(255,255,255,.08);
  --card:rgba(255,255,255,.04);
  --card-hi:rgba(255,255,255,.06);
  --r-card:18px;
  --r-sm:12px;
  --shadow-card:0 14px 36px rgba(3,8,18,.55);
  --shadow-lift:0 20px 46px rgba(3,8,18,.72);
  --ease:220ms cubic-bezier(.4,0,.2,1);
  --container:1240px;
  --sec-gap:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  min-height:100vh;
  background:linear-gradient(180deg,var(--bg-a) 0%,var(--bg-b) 100%);
  background-attachment:fixed;
  color:var(--c-text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(680px 460px at 6% 4%, rgba(47,216,182,.08), transparent 68%),
    radial-gradient(520px 400px at 96% 92%, rgba(31,182,216,.06), transparent 70%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.022;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-title);font-weight:700;letter-spacing:-.01em;line-height:1.28;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,216,182,.28);color:#fff;}
html{scrollbar-color:rgba(47,216,182,.35) rgba(255,255,255,.04);scrollbar-width:thin;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:rgba(255,255,255,.03);}
::-webkit-scrollbar-thumb{background:rgba(47,216,182,.28);border-radius:99px;border:2px solid transparent;background-clip:content-box;}
::-webkit-scrollbar-thumb:hover{background:rgba(47,216,182,.45);background-clip:content-box;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:2;
}
.section{padding:var(--sec-gap) 0;position:relative;z-index:2;}
.section-head{margin-bottom:32px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--teal);
  text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";width:4px;height:14px;border-radius:2px;background:linear-gradient(180deg,var(--teal),rgba(47,216,182,.25));}
h2.section-title{font-size:clamp(24px,2.6vw,33px);line-height:1.3;}
.section-sub{margin-top:12px;color:var(--c-muted);font-size:15px;max-width:640px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--teal);font-size:14px;font-weight:600;
  transition:transform var(--ease),color var(--ease);
}
.text-link:hover{transform:translateX(2px);color:var(--teal-hover);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;
  border-radius:999px;border:1px solid transparent;
  padding:14px 26px;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  color:#04121A;
  box-shadow:0 0 22px rgba(47,216,182,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(47,216,182,.5);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;color:var(--teal);
  border:1px solid rgba(47,216,182,.55);
  border-radius:12px;
}
.btn-ghost:hover{background:rgba(47,216,182,.08);border-color:var(--teal);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn:focus-visible,.text-link:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:2px;
  border-radius:8px;
}
.btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none;}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;line-height:1;padding:6px 10px;
  border-radius:999px;
  background:var(--teal-soft);color:var(--teal);
  border:1px solid rgba(47,216,182,.2);
}
.tag-dawn{
  background:rgba(255,154,60,.1);color:var(--dawn);
  border:1px solid rgba(255,154,60,.35);
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  transition:background var(--ease),backdrop-filter var(--ease),border-color var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-wrap{
  height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
}
.nav-side{display:flex;align-items:center;gap:30px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;color:var(--c-muted);
  padding:6px 0;
  transition:color var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;left:50%;bottom:-2px;
  width:0;height:2px;border-radius:2px;
  background:var(--teal);
  transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link:hover{color:var(--c-title);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--c-title);font-weight:600;}
.nav-link.active::after{width:18px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:800;color:var(--c-title);
  letter-spacing:-.01em;white-space:nowrap;
}
.brand-mark{width:28px;height:28px;flex:none;}
.brand:hover .brand-mark{filter:drop-shadow(0 0 8px rgba(47,216,182,.55));}
.nav-toggle{
  display:none;
  width:42px;height:42px;border:1px solid var(--line);
  background:var(--card);border-radius:12px;
  position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;width:20px;height:2px;border-radius:2px;
  background:var(--c-title);
  transition:transform var(--ease),opacity var(--ease),top var(--ease);
}
.nav-toggle span:nth-child(1){top:14px;}
.nav-toggle span:nth-child(2){top:20px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle.is-open span:nth-child(1){top:20px;transform:rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){top:20px;transform:rotate(-45deg);}
.mobile-panel{
  display:none;
  overflow:hidden;
  max-height:0;
  transition:max-height 200ms cubic-bezier(.4,0,.2,1);
  background:rgba(7,12,20,.94);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.mobile-panel.open{max-height:620px;}
.mobile-panel .mp-inner{padding:12px 16px 24px;}
.mp-link{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;font-size:15px;color:var(--c-text);
  border-bottom:1px solid var(--line);
  transition:color var(--ease),padding-left var(--ease);
}
.mp-link:last-of-type{border-bottom:0;}
.mp-link:hover,.mp-link.active{color:var(--teal);padding-left:6px;}
.mp-cta{margin-top:16px;}

/* ---------- Hero ---------- */
.hero{padding:64px 0 0;position:relative;z-index:2;}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  border:1px solid rgba(255,154,60,.45);
  background:rgba(255,154,60,.08);
  color:var(--dawn);font-size:13px;font-weight:600;
  margin-bottom:22px;
}
.hero-badge::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--dawn);box-shadow:0 0 10px rgba(255,154,60,.8);
}
h1.hero-title{
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.18;
  letter-spacing:-.01em;
  font-weight:800;
}
h1.hero-title em{
  font-style:normal;
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  color:var(--c-muted);
  max-width:520px;
  line-height:1.7;
}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap;}
.hero-trust{
  display:flex;gap:26px;margin-top:32px;flex-wrap:wrap;
  font-size:13px;color:var(--c-muted);
}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;}
.hero-trust svg{width:16px;height:16px;flex:none;color:var(--teal);}

.hero-visual{position:relative;min-height:400px;}
.hero-bg{
  position:relative;overflow:hidden;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:4/3;
}
.hero-bg img{width:100%;height:100%;object-fit:cover;}
.hero-bg-mask{
  position:absolute;inset:0;
  background:linear-gradient(150deg,rgba(7,12,20,.45),rgba(12,21,38,.72));
}
.hero-card{
  position:absolute;
  width:196px;
  border-radius:var(--r-card);
  overflow:hidden;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease);
}
.hero-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-card-body{padding:10px 12px 12px;}
.hero-card-body p{margin-top:8px;font-size:13px;color:var(--c-text);}
.hero-card-1{left:-14px;bottom:56px;transform:rotate(-2deg);}
.hero-card-2{right:-10px;top:36px;transform:rotate(1.6deg);}
.hero-visual:hover .hero-card-1{transform:rotate(-2deg) translateY(-4px);}
.hero-visual:hover .hero-card-2{transform:rotate(1.6deg) translateY(-4px);}
.hero-stat{
  position:absolute;left:-10px;top:18px;
  padding:12px 16px;border-radius:var(--r-sm);
  background:rgba(7,12,20,.82);
  border:1px solid rgba(47,216,182,.3);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-stat-num{display:block;font-size:20px;font-weight:800;color:var(--teal);line-height:1.1;}
.hero-stat-label{display:block;font-size:12px;color:var(--c-muted);margin-top:4px;}

/* ---------- 保障条 ---------- */
.guard-bar{
  margin-top:56px;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  padding:22px 26px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.guard-item{display:flex;align-items:center;gap:12px;}
.guard-icon{
  width:38px;height:38px;flex:none;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,216,182,.1);
  border:1px solid rgba(47,216,182,.24);
  color:var(--teal);
}
.guard-icon svg{width:18px;height:18px;}
.guard-text strong{display:block;font-size:14px;color:var(--c-title);font-weight:600;}
.guard-text small{display:block;font-size:12px;color:var(--c-muted);margin-top:2px;}

/* ---------- 卡片网格 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.card{
  position:relative;
  display:flex;flex-direction:column;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,216,182,.28);
  box-shadow:var(--shadow-lift);
  background:var(--card-hi);
}
.card-media{overflow:hidden;aspect-ratio:16/10;position:relative;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.4,0,.2,1);}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:19px;line-height:1.4;}
.card-body p{font-size:14px;line-height:1.6;color:var(--c-muted);}
.card-foot{
  margin-top:auto;padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.card-metric{font-size:13px;color:var(--c-muted);}
.card-metric b{color:var(--teal);font-size:16px;font-weight:800;margin-right:4px;}
.card-wide{grid-column:span 2;flex-direction:row;}
.card-wide .card-media{width:48%;aspect-ratio:auto;min-height:100%;}
.card-wide .card-body{width:52%;padding:26px 28px;}
.card-wide .card-body h3{font-size:22px;}

/* ---------- 时间轴 / CMS 列表 ---------- */
.timeline{display:flex;flex-direction:column;gap:14px;}
.timeline-row{
  display:grid;
  grid-template-columns:132px 1fr;
  gap:20px;
  align-items:stretch;
}
.timeline-date{
  font-size:14px;font-weight:700;color:var(--teal);
  padding-top:20px;
  position:relative;
  letter-spacing:.02em;
  word-break:break-all;
}
.timeline-row:not(:last-child) .timeline-date::after{
  content:"";
  position:absolute;left:2px;top:52px;bottom:-14px;
  width:1px;background:linear-gradient(180deg,rgba(47,216,182,.4),rgba(47,216,182,0));
}
.timeline-card{
  display:block;
  padding:20px 22px;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),background var(--ease),box-shadow var(--ease);
}
.timeline-card:hover{
  transform:translateY(-3px);
  border-color:rgba(47,216,182,.28);
  background:var(--card-hi);
  box-shadow:var(--shadow-card);
}
.timeline-card h3{font-size:17px;margin-top:10px;line-height:1.5;}
.timeline-card p{margin-top:8px;font-size:14px;color:var(--c-muted);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.timeline-more{display:inline-block;margin-top:12px;font-size:13px;color:var(--teal);font-weight:600;}
.empty-card{
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  padding:48px 28px;
  text-align:center;
}
.empty-card .empty-icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,216,182,.1);border:1px solid rgba(47,216,182,.24);color:var(--teal);
}
.empty-card p{color:var(--c-muted);font-size:15px;margin-bottom:18px;}

/* ---------- 评价轮播 ---------- */
.review-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:26px;}
.review-nav{display:flex;gap:10px;}
.review-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--c-text);
  display:flex;align-items:center;justify-content:center;
  transition:background var(--ease),color var(--ease),border-color var(--ease),opacity var(--ease);
}
.review-btn:hover:not(:disabled){background:rgba(47,216,182,.12);color:var(--teal);border-color:rgba(47,216,182,.35);}
.review-btn:disabled{opacity:.3;cursor:not-allowed;}
.review-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:8px;
  scrollbar-width:none;
}
.review-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 calc((100% - 40px) / 3);
  scroll-snap-align:start;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  padding:22px;
  transition:border-color var(--ease),background var(--ease);
}
.review-card:hover{border-color:rgba(47,216,182,.28);background:var(--card-hi);}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:none;
  background:linear-gradient(135deg,rgba(47,216,182,.35),rgba(31,182,216,.2));
  border:1px solid rgba(47,216,182,.35);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#04121A;
}
.review-name{font-size:15px;color:var(--c-title);font-weight:600;}
.review-role{font-size:12px;color:var(--c-muted);margin-top:2px;}
.stars{display:flex;gap:3px;margin:14px 0 10px;color:var(--dawn);}
.stars svg{width:14px;height:14px;}
.review-quote{font-size:14px;line-height:1.75;color:var(--c-text);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.review-dots{display:flex;justify-content:center;gap:8px;margin-top:22px;}
.review-dot{
  width:6px;height:6px;border-radius:99px;
  background:rgba(255,255,255,.18);
  transition:width var(--ease),background var(--ease);
  border:0;padding:0;
}
.review-dot.active{width:20px;background:var(--teal);}

/* ---------- 图文交替 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.split.reverse .split-media{order:2;}
.split.reverse .split-text{order:1;}
.split-media{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:4/3;
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(7,12,20,.2),rgba(7,12,20,.6));
}
.split-text h2{font-size:clamp(23px,2.4vw,30px);}
.split-text p{margin-top:18px;color:var(--c-muted);font-size:15.5px;line-height:1.85;}
.split-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.split-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:15px;color:var(--c-text);
}
.split-list svg{width:18px;height:18px;flex:none;color:var(--teal);margin-top:4px;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item.open{border-color:rgba(47,216,182,.28);background:var(--card-hi);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:transparent;border:0;
  padding:20px 22px;
  text-align:left;
  font-size:16px;font-weight:700;color:var(--c-title);
  line-height:1.55;
}
.faq-icon{
  width:26px;height:26px;flex:none;border-radius:50%;
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--c-muted);
  transition:transform var(--ease),color var(--ease),border-color var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--teal);border-color:rgba(47,216,182,.4);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms cubic-bezier(.4,0,.2,1);
}
.faq-a p{
  padding:0 22px 22px;
  font-size:15px;line-height:1.8;color:var(--c-muted);
}
.faq-item.open .faq-a{max-height:320px;}

/* ---------- CTA + 表单 ---------- */
.cta-band{
  position:relative;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  padding:40px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(520px 240px at 12% 40%, rgba(47,216,182,.2), transparent 70%);
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(21px,2.2vw,27px);}
.cta-band p{margin-top:10px;color:var(--c-muted);font-size:15px;max-width:520px;}

.form-panel{
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  padding:36px 36px 32px;
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px 24px;
}
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field.full{grid-column:span 2;}
.form-field label{font-size:13px;color:var(--c-muted);}
.form-field label .req{color:var(--teal);margin-left:3px;}
.form-field input,
.form-field textarea,
.form-field select{
  width:100%;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  padding:13px 14px;
  font-size:15px;
  color:var(--c-title);
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.form-field textarea{min-height:112px;resize:vertical;}
.form-field input::placeholder,
.form-field textarea::placeholder{color:rgba(143,161,182,.7);}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus{
  outline:none;
  border-color:var(--teal);
  box-shadow:0 0 0 3px rgba(47,216,182,.15);
  background:rgba(255,255,255,.05);
}
.form-field.has-error input,
.form-field.has-error textarea{border-color:var(--dawn);}
.form-error{font-size:12px;color:var(--dawn);display:none;}
.form-field.has-error .form-error{display:block;}
.form-actions{grid-column:span 2;display:flex;justify-content:flex-end;gap:14px;margin-top:6px;}
.form-note{grid-column:span 2;font-size:13px;color:var(--c-muted);}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec-gap);
  border-top:1px solid var(--line);
  position:relative;
  z-index:2;
  background:rgba(7,12,20,.4);
}
.site-footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(47,216,182,.16) 0 10px,transparent 10px 20px);
  opacity:.5;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding:64px 0 40px;
}
.footer-col h4{
  font-size:14px;color:var(--teal);font-weight:700;
  margin-bottom:18px;letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;color:var(--c-muted);
  transition:color var(--ease),transform var(--ease);
  display:inline-block;
}
.footer-links a:hover{color:var(--teal);transform:translateX(2px);}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-brand .brand{font-size:16px;}
.footer-slogan{font-size:13.5px;color:var(--c-muted);line-height:1.7;max-width:270px;}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:14px;color:var(--c-muted);}
.footer-contact span{display:flex;align-items:center;gap:9px;}
.footer-contact svg{width:16px;height:16px;color:var(--teal);flex:none;}
.qr-placeholder{
  width:96px;height:96px;border-radius:12px;
  border:1px dashed rgba(255,255,255,.16);
  background:rgba(255,255,255,.03);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--c-muted);
  margin-top:6px;
}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-muted);
}
.footer-bottom a{color:var(--c-muted);transition:color var(--ease);}
.footer-bottom a:hover{color:var(--teal);}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--c-title);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity var(--ease),visibility var(--ease),transform var(--ease),border-color var(--ease),color var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,216,182,.4);color:var(--teal);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sec-gap:80px;}
  .container{padding:0 24px;}
  .hero-grid{gap:36px;}
}
@media (max-width:1023px){
  :root{--sec-gap:72px;}
  .nav-side,.nav-wrap .brand{ }
  .nav-wrap{grid-template-columns:auto 1fr auto;height:60px;gap:16px;}
  .nav-side{display:none;}
  .nav-right{display:none;}
  .nav-toggle{display:block;grid-column:3;}
  .nav-wrap > .brand{grid-column:2;justify-self:center;}
  .mobile-panel{display:block;}
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-visual{min-height:0;}
  .hero-card{width:168px;}
  .guard-bar{grid-template-columns:repeat(2,1fr);padding:20px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .card-wide{grid-column:span 2;flex-direction:column;}
  .card-wide .card-media{width:100%;aspect-ratio:16/10;min-height:0;}
  .card-wide .card-body{width:100%;padding:20px 22px;}
  .review-card{flex:0 0 calc((100% - 20px) / 2);}
  .split{grid-template-columns:1fr;gap:32px;}
  .split.reverse .split-media{order:1;}
  .split.reverse .split-text{order:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 32px;}
}
@media (max-width:639px){
  :root{--sec-gap:56px;}
  .container{padding:0 16px;}
  body{font-size:15.5px;}
  .hero{padding:40px 0 0;}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 auto;}
  .hero-trust{gap:16px;font-size:12.5px;}
  .hero-card{width:142px;}
  .hero-card-1{left:-6px;bottom:34px;}
  .hero-card-2{right:-4px;top:20px;}
  .hero-stat{padding:10px 13px;left:-4px;}
  .hero-stat-num{font-size:17px;}
  .guard-bar{grid-template-columns:repeat(2,1fr);gap:14px;margin-top:40px;padding:18px 16px;}
  .guard-text strong{font-size:13px;}
  .card-grid{grid-template-columns:1fr;gap:18px;}
  .card-wide{grid-column:span 1;}
  .timeline-row{grid-template-columns:1fr;gap:8px;}
  .timeline-date{padding-top:0;font-size:13px;}
  .timeline-row:not(:last-child) .timeline-date::after{display:none;}
  .review-card{flex:0 0 86%;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;text-align:left;}
  .cta-band .btn{width:100%;}
  .form-panel{padding:24px 18px 22px;}
  .form-grid{grid-template-columns:1fr;gap:16px;}
  .form-field.full{grid-column:span 1;}
  .form-actions{grid-column:span 1;flex-direction:column-reverse;}
  .form-actions .btn{width:100%;}
  .form-note{grid-column:span 1;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .to-top{right:14px;bottom:18px;width:42px;height:42px;}
  .faq-q{font-size:15px;padding:17px 16px;}
  .faq-a p{padding:0 16px 18px;font-size:14.5px;}
}

/* roulang page: article */
:root{
  --cloud-900:#070C14;
  --cloud-800:#0C1526;
  --mist-teal:#2FD8B6;
  --mist-teal-hi:#3FE3C2;
  --mist-teal-deep:#1FB6D8;
  --dawn:#FF9A3C;
  --text-1:#EAF1F8;
  --text-2:#C6D3E1;
  --text-3:#8FA1B6;
  --line:rgba(255,255,255,.08);
  --card:rgba(255,255,255,.04);
  --card-hi:rgba(255,255,255,.06);
  --disabled:#3A4757;
  --r-card:18px;
  --r-soft:12px;
  --shadow-1:0 14px 36px rgba(3,8,18,.55);
  --shadow-2:0 20px 46px rgba(3,8,18,.7);
  --ease:cubic-bezier(.4,0,.2,1);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100%;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-2);
  background:linear-gradient(180deg,#070C14 0%,#0C1526 55%,#070C14 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(780px 540px at 6% -8%, rgba(47,216,182,.08), transparent 70%),
    radial-gradient(680px 460px at 102% 4%, rgba(31,182,216,.055), transparent 72%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  opacity:.02;
  pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='140' height='140' filter='url(/%23n)'/></svg>");
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea{font:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:-.01em;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,216,182,.28);color:#04121A;}
:focus-visible{outline:2px solid var(--mist-teal);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;position:relative;z-index:1;}
.sec{padding:var(--sec) 0;}
.sec-sm{padding:56px 0;}
.glass{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-1);
  position:relative;
}
.glass::before{
  content:"";
  position:absolute;
  left:14px;right:14px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  font-size:15px;
  font-weight:700;
  border-radius:999px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  color:#04121A;
  box-shadow:0 0 22px rgba(47,216,182,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(47,216,182,.5);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;
  color:var(--mist-teal);
  border:1px solid rgba(47,216,182,.55);
  border-radius:var(--r-soft);
}
.btn-ghost:hover{background:rgba(47,216,182,.08);color:var(--mist-teal-hi);border-color:var(--mist-teal-hi);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  font-size:12px;
  line-height:1.6;
  color:var(--mist-teal);
  background:rgba(47,216,182,.12);
  border:1px solid rgba(47,216,182,.22);
  border-radius:999px;
}
.pill-dawn{
  color:var(--dawn);
  background:rgba(255,154,60,.1);
  border-color:rgba(255,154,60,.35);
}
.read-progress{
  position:fixed;
  top:0;left:0;
  height:2px;
  width:0;
  background:linear-gradient(90deg,#2FD8B6,#1FB6D8);
  z-index:100;
  transition:width .1s linear;
}
/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  transition:background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(7,12,20,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:72px;
  gap:20px;
}
.nav-side{display:flex;align-items:center;gap:30px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--text-3);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-3px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--mist-teal);
  transform:translateX(-50%);
  transition:width .22s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--text-1);}
.nav-link.active::after{width:18px;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{width:34px;height:34px;flex:0 0 auto;}
.brand-text{font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--text-1);}
.burger{
  display:none;
  width:40px;height:40px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  border-radius:var(--r-soft);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .22s var(--ease),opacity .22s var(--ease);}
.burger span + span{margin-top:5px;}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.burger.is-open span:nth-child(2){opacity:0;}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-panel{
  overflow:hidden;
  max-height:0;
  transition:max-height .2s var(--ease);
  border-top:1px solid transparent;
}
.mobile-panel.open{max-height:640px;border-top-color:var(--line);}
.mobile-inner{
  padding:12px 0 22px;
  background:rgba(7,12,20,.9);
  backdrop-filter:blur(16px);
}
.mobile-inner a{
  display:flex;
  align-items:center;
  height:52px;
  padding:0 4px;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.mobile-inner a:hover{color:var(--mist-teal);}
.mobile-inner .btn{height:auto;border-bottom:0;margin-top:16px;width:100%;color:#04121A;}
/* 文章头部 */
.article-hero{
  position:relative;
  padding:52px 0 44px;
  background-image:linear-gradient(180deg,rgba(7,12,20,.82),rgba(12,21,38,.9)),url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--mist-teal);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{background:linear-gradient(100deg,#2FD8B6,#1FB6D8);-webkit-background-clip:text;background-clip:text;color:transparent;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--text-3);margin-bottom:18px;}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--line);}
.article-title{
  font-size:clamp(28px,3.6vw,44px);
  font-weight:800;
  color:var(--text-1);
  max-width:960px;
  overflow-wrap:anywhere;
}
.article-lead{
  margin-top:22px;
  max-width:820px;
  padding:18px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  background:rgba(47,216,182,.05);
  border-left:3px solid rgba(47,216,182,.6);
  border-radius:0 var(--r-soft) var(--r-soft) 0;
}
/* 正文 */
.article-body{
  max-width:800px;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  overflow-wrap:anywhere;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.4em;}
.article-body h2{
  position:relative;
  margin:40px 0 18px;
  padding-left:16px;
  font-size:28px;
  color:var(--text-1);
  font-weight:700;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.24em;
  bottom:.24em;
  width:4px;
  border-radius:2px;
  background:var(--mist-teal);
}
.article-body h3{margin:28px 0 12px;font-size:20px;color:var(--mist-teal);font-weight:700;}
.article-body h4{margin:22px 0 10px;font-size:17px;color:var(--text-1);}
.article-body a{color:var(--mist-teal);border-bottom:1px solid rgba(47,216,182,.35);}
.article-body a:hover{color:var(--mist-teal-hi);border-bottom-color:var(--mist-teal-hi);}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em;line-height:1.8;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body blockquote{
  margin:26px 0;
  padding:16px 22px;
  background:rgba(47,216,182,.06);
  border-left:3px solid var(--mist-teal);
  border-radius:0 12px 12px 0;
  color:var(--text-2);
}
.article-body img{border-radius:12px;margin:26px auto;width:100%;height:auto;}
.article-body figure{margin:0 0 1.4em;}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.article-body th{background:rgba(47,216,182,.1);color:var(--text-1);font-weight:700;}
.article-body code{background:rgba(255,255,255,.06);padding:2px 6px;border-radius:6px;font-size:.92em;}
.empty-state{
  max-width:640px;
  margin:0 auto;
  text-align:center;
  padding:56px 32px;
}
.empty-state h2{font-size:26px;margin-bottom:14px;}
.empty-state p{margin-bottom:26px;color:var(--text-3);}
/* 标签行 */
.tag-row{
  max-width:800px;
  margin:48px auto 0;
  padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
}
.tag-row .tag-label{font-size:13px;color:var(--text-3);margin-right:4px;}
/* 上下篇 */
.post-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.post-card{
  display:block;
  padding:22px 24px;
  border-radius:var(--r-card);
  background:var(--card);
  border:1px solid var(--line);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),box-shadow .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(47,216,182,.28);background:var(--card-hi);box-shadow:var(--shadow-2);}
.post-card .post-dir{font-size:13px;color:var(--text-3);display:block;margin-bottom:8px;}
.post-card h3{font-size:18px;color:var(--text-1);margin-bottom:6px;}
.post-card p{font-size:14px;line-height:1.6;color:var(--text-3);}
.post-card.next{text-align:right;}
/* 相关推荐 */
.rec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.rec-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--card);
  border:1px solid var(--line);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rec-card:hover{transform:translateY(-4px);border-color:rgba(47,216,182,.28);box-shadow:var(--shadow-2);}
.rec-thumb{aspect-ratio:16/10;overflow:hidden;background:rgba(255,255,255,.03);}
.rec-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease);}
.rec-card:hover .rec-thumb img{transform:scale(1.04);}
.rec-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;}
.rec-body h3{font-size:17px;line-height:1.5;}
.rec-body p{font-size:14px;line-height:1.6;color:var(--text-3);}
.sec-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:32px;
}
.sec-head h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(24px,3vw,32px);
}
.sec-head h2::before{
  content:"";
  position:absolute;
  left:0;top:.22em;bottom:.22em;width:4px;border-radius:2px;
  background:linear-gradient(180deg,#2FD8B6,rgba(47,216,182,.25));
}
.sec-head p{font-size:14px;color:var(--text-3);margin-top:10px;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--mist-teal);}
.link-more:hover{color:var(--mist-teal-hi);}
.link-more:hover .arrow{transform:translateX(2px);}
.link-more .arrow{transition:transform .22s var(--ease);}
/* CTA 条 */
.cta-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:40px;
  border-radius:var(--r-card);
  background:
    radial-gradient(420px 220px at 12% 0%, rgba(47,216,182,.2), transparent 70%),
    var(--card);
  border:1px solid var(--line);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-1);
}
.cta-bar h2{font-size:clamp(20px,2.4vw,26px);margin-bottom:10px;}
.cta-bar p{margin:0;font-size:14px;color:var(--text-3);max-width:620px;}
/* 页脚 */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:24px;
  border-top:1px solid var(--line);
  background:rgba(7,12,20,.6);
  padding:64px 0 28px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:6px;
  background-image:linear-gradient(90deg,rgba(47,216,182,.18) 0 8px,transparent 8px 16px);
  background-size:16px 6px;
  opacity:.35;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;}
.footer-col h4{font-size:14px;color:var(--mist-teal);margin-bottom:16px;font-weight:700;}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-slogan{font-size:14px;color:var(--text-3);line-height:1.8;max-width:280px;}
.footer-links,.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-links a,.footer-contact li{font-size:14px;color:var(--text-3);transition:color .22s var(--ease),transform .22s var(--ease);}
.footer-links a:hover{color:var(--mist-teal);transform:translateX(2px);}
.qr-box{
  width:96px;height:96px;
  border-radius:var(--r-soft);
  border:1px dashed rgba(255,255,255,.18);
  background:rgba(255,255,255,.03);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  color:var(--text-3);
  text-align:center;
  padding:8px;
}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  color:var(--mist-teal);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),border-color .22s var(--ease);
  z-index:70;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,216,182,.5);}
@media (max-width:1279px){
  :root{--sec:72px;}
}
@media (max-width:1023px){
  .nav-side{display:none;}
  .burger{display:flex;}
  .nav-inner{grid-template-columns:1fr auto 1fr;height:60px;}
  .nav-inner .nav-left-slot{display:none;}
  .brand{justify-self:center;}
  .rec-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  :root{--sec:56px;}
  .container{padding:0 16px;}
  .article-hero{padding:36px 0 32px;}
  .article-title{font-size:28px;}
  .article-body{font-size:16.5px;}
  .article-body h2{font-size:23px;margin-top:34px;}
  .post-nav{grid-template-columns:1fr;}
  .post-card.next{text-align:left;}
  .rec-grid{grid-template-columns:1fr;}
  .sec-head{margin-bottom:24px;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:28px 22px;text-align:left;}
  .cta-bar .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:520px){
  .brand-text{font-size:17px;}
  .brand-mark{width:28px;height:28px;}
  .article-lead{padding:14px 16px;}
}

/* roulang page: category1 */
:root{
  --cloud-900:#070C14;
  --cloud-800:#0C1526;
  --teal:#2FD8B6;
  --teal-hi:#3FE3C2;
  --teal-deep:#1FB6D8;
  --dawn:#FF9A3C;
  --text:#EAF1F8;
  --body:#C6D3E1;
  --muted:#8FA1B6;
  --line:rgba(255,255,255,.08);
  --card:rgba(255,255,255,.04);
  --card-hi:rgba(255,255,255,.06);
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 14px 36px rgba(3,8,18,.55);
  --shadow-hi:0 22px 50px rgba(3,8,18,.7);
  --ease:220ms cubic-bezier(.4,0,.2,1);
  --sec-gap:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background-color:var(--cloud-900);
  background-image:
    radial-gradient(680px 420px at 8% 4%, rgba(47,216,182,.08), transparent 62%),
    linear-gradient(180deg,#070C14 0%,#0C1526 100%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.02;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px, transparent 1px);
  background-size:3px 3px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),opacity var(--ease);}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:800;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:var(--sec-gap) 0;}
.section-head{margin-bottom:32px;max-width:760px;}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);
  display:flex;
  align-items:center;
  gap:12px;
}
.section-head h2::before{
  content:"";
  width:4px;
  height:26px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--teal),rgba(47,216,182,.15));
  flex:0 0 auto;
}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;max-width:640px;}

/* ===== 导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  height:72px;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:28px;
}
.nav-side{display:flex;align-items:center;gap:32px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--muted);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--teal);
  transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--text);}
.nav-link.active::after{width:18px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:6px 4px;
  border-radius:var(--radius-sm);
}
.brand-mark{width:34px;height:34px;flex:0 0 auto;}
.brand-text{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand:hover .brand-text{color:var(--teal-hi);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  background:var(--card);
  border-radius:var(--radius-sm);
  cursor:pointer;
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:11px;
  width:20px;height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform var(--ease),opacity var(--ease),top var(--ease);
}
.nav-toggle span:nth-child(1){top:14px;}
.nav-toggle span:nth-child(2){top:20px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle.is-open span:nth-child(1){top:20px;transform:rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){top:20px;transform:rotate(-45deg);}
.mobile-panel{
  display:none;
  overflow:hidden;
  max-height:0;
  transition:max-height 200ms cubic-bezier(.4,0,.2,1);
  background:rgba(7,12,20,.94);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.mobile-panel.is-open{max-height:760px;}
.mobile-inner{padding:12px 16px 24px;}
.mobile-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:52px;
  border-bottom:1px solid var(--line);
  color:var(--body);
  font-size:15px;
}
.mobile-item.active{color:var(--teal);}
.mobile-label{
  padding:16px 0 8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--teal);
}
.mobile-cta{margin-top:20px;display:block;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  font-size:15px;
  font-weight:700;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease),filter var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  color:#04121A;
  box-shadow:0 0 22px rgba(47,216,182,.35);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(47,216,182,.5);
  filter:brightness(1.06);
  color:#04121A;
}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;
  color:var(--teal);
  border:1px solid rgba(47,216,182,.55);
  border-radius:var(--radius-sm);
}
.btn-ghost:hover{background:rgba(47,216,182,.08);color:var(--teal-hi);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ===== 分类头部 ===== */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
  padding-top:44px;
}
.crumb a:hover{color:var(--teal);}
.crumb .sep{color:rgba(255,255,255,.22);}
.crumb .current{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:700;
}
.cat-hero{
  padding:36px 0 72px;
  position:relative;
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  right:-160px;
  top:-120px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(47,216,182,.14), transparent 66%);
  pointer-events:none;
}
.cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.45fr) minmax(0,.85fr);
  gap:48px;
  align-items:center;
  position:relative;
  z-index:1;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--dawn);
  border:1px solid rgba(255,154,60,.45);
  border-radius:999px;
  background:rgba(255,154,60,.07);
}
.cat-hero h1{
  margin-top:20px;
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.22;
}
.cat-hero h1 .accent{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cat-lead{
  margin-top:22px;
  max-width:640px;
  color:var(--body);
  font-size:17px;
}
.cat-lead + .cat-lead{margin-top:12px;}
.anchor-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.anchor-chip{
  padding:8px 16px;
  font-size:13px;
  color:var(--teal);
  background:rgba(47,216,182,.12);
  border:1px solid rgba(47,216,182,.22);
  border-radius:999px;
  transition:background var(--ease),transform var(--ease),color var(--ease);
}
.anchor-chip:hover{background:rgba(47,216,182,.2);color:var(--teal-hi);transform:translateY(-2px);}
.hero-figure{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  border:1px solid var(--line);
  aspect-ratio:4/3;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(7,12,20,.2), rgba(7,12,20,.72));
}
.hero-stat{
  position:absolute;
  left:18px;
  bottom:18px;
  z-index:2;
  padding:14px 18px;
  border-radius:var(--radius-sm);
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-stat strong{
  display:block;
  font-size:24px;
  color:var(--teal);
  line-height:1.1;
}
.hero-stat span{font-size:12px;color:var(--muted);}

/* ===== 图文交替 ===== */
.alt-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
}
.alt-row + .alt-row{margin-top:80px;}
.alt-row.reverse .alt-media{order:2;}
.alt-media{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
  position:relative;
}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
.alt-media:hover img{transform:scale(1.04);}
.alt-body h3{
  font-size:21px;
  margin-bottom:14px;
}
.alt-body p + p{margin-top:14px;}
.tick-list{margin-top:22px;display:grid;gap:12px;}
.tick-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  color:var(--body);
}
.tick-list li svg{
  flex:0 0 auto;
  width:20px;height:20px;
  margin-top:3px;
  color:var(--teal);
}
.step-tag{
  display:inline-block;
  font-size:12px;
  font-weight:700;
  color:var(--teal);
  background:rgba(47,216,182,.12);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:12px;
}

/* ===== 配图区 ===== */
.shot-row{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.shot{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--card);
  box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.shot:hover{transform:translateY(-4px);border-color:rgba(47,216,182,.28);box-shadow:var(--shadow-hi);}
.shot-img{aspect-ratio:16/10;overflow:hidden;}
.shot-img img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
.shot:hover .shot-img img{transform:scale(1.04);}
.shot-body{padding:18px 20px 22px;}
.shot-body h3{font-size:17px;margin-bottom:8px;}
.shot-body p{font-size:14px;color:var(--muted);line-height:1.65;}

/* ===== 表格 ===== */
.table-card{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--card);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;}
table{width:100%;border-collapse:collapse;min-width:680px;}
thead th{
  text-align:left;
  font-size:13px;
  font-weight:700;
  color:var(--teal);
  background:rgba(47,216,182,.1);
  padding:16px 20px;
  white-space:nowrap;
}
tbody td{
  padding:16px 20px;
  font-size:14.5px;
  color:var(--body);
  border-top:1px solid var(--line);
  vertical-align:top;
}
tbody tr:hover td{background:rgba(255,255,255,.03);}
tbody td:first-child{color:var(--text);font-weight:700;}

/* ===== FAQ ===== */
.faq-list{
  width:100%;
  max-width:860px;
  margin:0 auto;
  display:grid;
  gap:14px;
}
.faq-item{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--card);
  overflow:hidden;
  transition:border-color var(--ease),background var(--ease);
}
.faq-item.is-open{
  border-color:rgba(47,216,182,.28);
  background:var(--card-hi);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 24px;
  background:none;
  border:0;
  cursor:pointer;
  text-align:left;
  font-size:16px;
  font-weight:700;
  color:var(--text);
}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  transition:transform var(--ease),color var(--ease),border-color var(--ease);
  font-size:17px;
  line-height:1;
}
.faq-item.is-open .faq-icon{
  transform:rotate(45deg);
  color:var(--teal);
  border-color:rgba(47,216,182,.45);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms cubic-bezier(.4,0,.2,1);
}
.faq-a p{
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}

/* ===== CTA ===== */
.cta-bar{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--card);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  padding:40px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-bar::after{
  content:"";
  position:absolute;
  left:-80px;top:-120px;
  width:420px;height:320px;
  background:radial-gradient(circle, rgba(47,216,182,.2), transparent 68%);
  pointer-events:none;
}
.cta-bar h2{font-size:clamp(22px,2.4vw,30px);position:relative;z-index:1;}
.cta-bar p{margin-top:10px;color:var(--muted);font-size:15px;max-width:520px;position:relative;z-index:1;}
.cta-actions{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:var(--sec-gap);
  border-top:1px solid var(--line);
  background:rgba(255,255,255,.015);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:6px;
  opacity:.16;
  background-image:repeating-linear-gradient(90deg, rgba(47,216,182,.9) 0 18px, transparent 18px 30px);
  mask-image:linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
  -webkit-mask-image:linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:44px;
  padding:64px 0 42px;
}
.footer-col h4{
  font-size:14px;
  color:var(--teal);
  margin-bottom:18px;
  font-weight:700;
}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-slogan{font-size:14px;color:var(--muted);max-width:280px;}
.footer-links{display:grid;gap:11px;}
.footer-links a{
  font-size:14px;
  color:var(--muted);
  transition:color var(--ease),transform var(--ease);
  display:inline-block;
}
.footer-links a:hover{color:var(--teal);transform:translateX(-2px);}
.footer-contact{display:grid;gap:14px;font-size:14px;color:var(--muted);}
.footer-contact .row{display:flex;align-items:center;gap:10px;}
.footer-contact svg{width:18px;height:18px;color:var(--teal);flex:0 0 auto;}
.qr-box{
  width:104px;height:104px;
  border-radius:var(--radius-sm);
  border:1px dashed rgba(255,255,255,.18);
  background:var(--card);
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  font-size:12px;
  color:var(--muted);
  padding:10px;
}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:rgba(143,161,182,.85);
}
.footer-bottom a{color:rgba(143,161,182,.85);}
.footer-bottom a:hover{color:var(--teal);}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--teal);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{background:rgba(47,216,182,.12);}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container{padding:0 24px;}
  :root{--sec-gap:80px;}
}
@media (max-width:1023px){
  :root{--sec-gap:72px;}
  .nav-wrap{height:60px;grid-template-columns:auto 1fr auto;}
  .nav-side{display:none;}
  .nav-toggle{display:block;order:3;}
  .brand{order:2;justify-content:center;margin:0 auto;}
  .brand-mark{width:30px;height:30px;}
  .brand-text{font-size:17px;}
  .mobile-panel{display:block;}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;}
  .cat-hero::after{display:none;}
  .alt-row{grid-template-columns:1fr;gap:28px;}
  .alt-row.reverse .alt-media{order:0;}
  .alt-row + .alt-row{margin-top:56px;}
  .shot-row{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;padding:52px 0 34px;}
}
@media (max-width:767px){
  :root{--sec-gap:56px;}
  .container{padding:0 16px;}
  .crumb{padding-top:30px;}
  .cat-hero{padding:26px 0 52px;}
  .cat-lead{font-size:16px;}
  .anchor-row{gap:8px;}
  .anchor-chip{padding:7px 13px;font-size:12.5px;}
  .shot-row{grid-template-columns:1fr;}
  .cta-bar{flex-direction:column;align-items:flex-start;padding:28px 22px;text-align:left;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-col h4{margin-bottom:12px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{padding:17px 18px;font-size:15px;}
  .faq-a p{padding:0 18px 18px;}
  .to-top{right:16px;bottom:16px;}
  .btn{padding:12px 22px;font-size:14.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
    --bg-1:#070C14;
    --bg-2:#0C1526;
    --primary:#2FD8B6;
    --primary-hover:#3FE3C2;
    --primary-deep:#1FB6D8;
    --accent:#FF9A3C;
    --text-1:#EAF1F8;
    --text-2:#C6D3E1;
    --text-3:#8FA1B6;
    --line:rgba(255,255,255,.08);
    --card:rgba(255,255,255,.04);
    --card-hi:rgba(255,255,255,.06);
    --radius-card:18px;
    --radius-ctl:12px;
    --shadow-1:0 14px 36px rgba(3,8,18,.55);
    --shadow-2:0 20px 46px rgba(3,8,18,.68), 0 0 0 1px rgba(47,216,182,.28);
    --ease:220ms cubic-bezier(.4,0,.2,1);
    --sec-desktop:96px;
    --sec-tablet:72px;
    --sec-mobile:56px;
  }

  *,*::before,*::after{box-sizing:border-box;}

  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

  body{
    margin:0;
    min-height:100vh;
    font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--text-2);
    background:
      radial-gradient(680px 520px at 8% 2%, rgba(47,216,182,.08), transparent 62%),
      radial-gradient(520px 420px at 92% 12%, rgba(255,154,60,.05), transparent 65%),
      linear-gradient(180deg,var(--bg-1) 0%, var(--bg-2) 100%);
    background-attachment:fixed;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }

  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    opacity:.35;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(/%23n)' opacity='.05'/%3E%3C/svg%3E");
  }

  a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease),transform var(--ease),box-shadow var(--ease);}
  img{max-width:100%;display:block;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}

  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}

  .container{
    width:100%;
    max-width:1240px;
    margin:0 auto;
    padding:0 32px;
    position:relative;
    z-index:1;
  }

  .section{padding:var(--sec-desktop) 0;}
  .section-tight{padding:64px 0;}

  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
  .section-title{position:relative;padding-left:16px;font-size:30px;font-weight:800;}
  .section-title::before{
    content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;
    background:linear-gradient(180deg,var(--primary),rgba(47,216,182,.15));
  }
  .section-sub{color:var(--text-3);font-size:14px;margin-top:10px;max-width:640px;}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12px;letter-spacing:.06em;color:var(--accent);
    border:1px solid rgba(255,154,60,.42);
    background:rgba(255,154,60,.08);
    padding:6px 14px;border-radius:999px;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;
    font-weight:700;font-size:15px;
    padding:13px 26px;
    border:1px solid transparent;
    cursor:pointer;
    white-space:nowrap;
    transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),border-color var(--ease),color var(--ease),filter var(--ease);
  }
  .btn-primary{
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    color:#04121A;
    box-shadow:0 0 22px rgba(47,216,182,.35);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 32px rgba(47,216,182,.5);filter:brightness(1.06);}
  .btn-primary:active{transform:translateY(1px);box-shadow:none;}
  .btn-ghost{
    background:transparent;
    color:var(--primary);
    border-color:rgba(47,216,182,.55);
    border-radius:var(--radius-ctl);
  }
  .btn-ghost:hover{background:rgba(47,216,182,.08);border-color:var(--primary);color:var(--primary-hover);}
  .btn-ghost:active{transform:translateY(1px);}
  .btn-sm{padding:9px 18px;font-size:13px;}

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background-color var(--ease),border-color var(--ease),backdrop-filter var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(7,12,20,.72);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom-color:var(--line);
  }
  .nav-inner{
    height:72px;
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    gap:24px;
  }
  .nav-side{display:flex;align-items:center;gap:30px;}
  .nav-left{justify-content:flex-end;}
  .nav-right{justify-content:flex-start;}
  .nav-link{
    position:relative;
    font-size:14.5px;
    color:var(--text-3);
    padding:6px 2px;
    font-weight:500;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;
    background:var(--primary);border-radius:2px;transform:translateX(-50%);
    transition:width var(--ease);
  }
  .nav-link:hover{color:var(--text-1);}
  .nav-link:hover::after{width:18px;}
  .nav-link.active{color:var(--text-1);font-weight:700;}
  .nav-link.active::after{width:18px;}

  .brand{display:inline-flex;align-items:center;gap:10px;}
  .brand-mark{width:34px;height:34px;flex:0 0 auto;}
  .brand-text{font-size:19px;font-weight:800;color:var(--text-1);letter-spacing:.01em;}
  .nav-logo{justify-self:center;}

  .nav-cta{margin-left:4px;}
  .nav-toggle{
    display:none;
    width:42px;height:42px;
    border:1px solid var(--line);
    background:var(--card);
    border-radius:var(--radius-ctl);
    align-items:center;justify-content:center;
    flex-direction:column;gap:5px;
    cursor:pointer;
  }
  .nav-toggle span{
    display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;
    transition:transform var(--ease),opacity var(--ease);
  }
  .nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.is-open span:nth-child(2){opacity:0;}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  .mobile-panel{
    overflow:hidden;
    max-height:0;
    transition:max-height 200ms cubic-bezier(.4,0,.2,1);
    background:rgba(7,12,20,.96);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-top:1px solid transparent;
  }
  .mobile-panel.is-open{max-height:620px;border-top-color:var(--line);}
  .mobile-panel a{
    display:flex;align-items:center;justify-content:space-between;
    height:52px;padding:0 20px;font-size:15px;color:var(--text-2);
    border-bottom:1px solid var(--line);
  }
  .mobile-panel a.active{color:var(--primary);}
  .mobile-panel .mobile-cta{padding:18px 20px 26px;border-bottom:none;display:block;height:auto;}
  .mobile-panel .mobile-cta .btn{width:100%;}

  /* ---------- 分类头部 ---------- */
  .page-hero{
    position:relative;
    padding:56px 0 56px;
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background:
      radial-gradient(560px 320px at 78% 12%, rgba(47,216,182,.12), transparent 66%),
      linear-gradient(180deg, rgba(255,255,255,.02), transparent 70%);
    pointer-events:none;
  }
  .breadcrumb{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    font-size:14px;color:var(--text-3);margin-bottom:22px;position:relative;
  }
  .breadcrumb a:hover{color:var(--primary);}
  .breadcrumb .sep{color:rgba(255,255,255,.22);}
  .breadcrumb .current{color:transparent;background:linear-gradient(100deg,#2FD8B6,#1FB6D8);-webkit-background-clip:text;background-clip:text;font-weight:600;}

  .page-hero h1{
    font-size:clamp(30px,4.2vw,48px);
    font-weight:800;
    max-width:900px;
    position:relative;
  }
  .page-hero h1 .hl{
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .page-lead{
    margin-top:20px;max-width:760px;font-size:16.5px;color:var(--text-2);
  }
  .page-lead + .page-lead{margin-top:12px;}

  .anchor-nav{
    display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;position:relative;
  }
  .anchor-nav a{
    font-size:13.5px;color:var(--text-2);
    padding:9px 18px;border-radius:999px;
    border:1px solid var(--line);background:var(--card);
  }
  .anchor-nav a:hover{color:var(--primary);border-color:rgba(47,216,182,.42);background:rgba(47,216,182,.07);transform:translateY(-2px);}

  /* ---------- 卡片通用 ---------- */
  .glass{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-1);
    position:relative;
    overflow:hidden;
  }
  .glass::before{
    content:"";position:absolute;left:0;right:0;top:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
  }
  .glass-hover{transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);}
  .glass-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(47,216,182,.28);}

  .tag{
    display:inline-flex;align-items:center;
    font-size:12px;line-height:1;
    padding:6px 12px;border-radius:999px;
    background:rgba(47,216,182,.12);
    color:var(--primary);
    border:1px solid rgba(47,216,182,.2);
  }
  .tag-accent{background:rgba(255,154,60,.1);color:var(--accent);border-color:rgba(255,154,60,.28);}

  /* ---------- 三步流程时间轴 ---------- */
  .steps{position:relative;margin-top:12px;}
  .steps::before{
    content:"";position:absolute;left:26px;top:18px;bottom:18px;width:2px;
    background:linear-gradient(180deg,rgba(47,216,182,.6),rgba(47,216,182,.06));
  }
  .step{
    display:grid;grid-template-columns:54px 1fr;gap:24px;
    padding:22px 0;
    position:relative;
  }
  .step-idx{
    width:54px;height:54px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    font-weight:800;font-size:17px;color:#04121A;
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    box-shadow:0 0 22px rgba(47,216,182,.32);
    position:relative;z-index:1;
  }
  .step-body{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    padding:24px 26px;
    transition:border-color var(--ease),background-color var(--ease),transform var(--ease);
  }
  .step-body:hover{border-color:rgba(47,216,182,.28);background:var(--card-hi);transform:translateY(-2px);}
  .step-body h3{font-size:20px;margin-bottom:10px;}
  .step-body p{font-size:15.5px;color:var(--text-2);}
  .step-list{margin-top:14px;display:grid;gap:8px;}
  .step-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--text-3);}
  .step-list li::before{
    content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
    background:var(--primary);opacity:.8;
  }

  /* ---------- 配图区 ---------- */
  .gallery{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:24px;
  }
  .shot{
    border-radius:var(--radius-card);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--card);
    box-shadow:var(--shadow-1);
    transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  }
  .shot:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(47,216,182,.28);}
  .shot-media{aspect-ratio:16/10;overflow:hidden;position:relative;background:#0A101C;}
  .shot-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
  .shot:hover .shot-media img{transform:scale(1.04);}
  .shot-cap{padding:16px 18px 18px;}
  .shot-cap h3{font-size:16.5px;margin-bottom:6px;}
  .shot-cap p{font-size:13.5px;color:var(--text-3);line-height:1.6;}

  /* ---------- 参数表 ---------- */
  .table-wrap{
    border-radius:var(--radius-card);
    border:1px solid var(--line);
    background:var(--card);
    overflow:hidden;
    box-shadow:var(--shadow-1);
  }
  table{width:100%;border-collapse:collapse;}
  thead th{
    text-align:left;
    font-size:13px;letter-spacing:.04em;color:var(--primary);
    font-weight:700;
    padding:16px 22px;
    background:rgba(47,216,182,.1);
    border-bottom:1px solid var(--line);
    white-space:nowrap;
  }
  tbody td{
    padding:16px 22px;
    font-size:14.5px;
    color:var(--text-2);
    border-bottom:1px solid var(--line);
    vertical-align:top;
  }
  tbody tr:last-child td{border-bottom:none;}
  tbody tr{transition:background-color var(--ease);}
  tbody tr:hover{background:rgba(255,255,255,.03);}
  td .k{color:var(--text-1);font-weight:600;}

  /* ---------- FAQ ---------- */
  .faq{max-width:860px;margin:0 auto;display:grid;gap:14px;}
  .faq-item{
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--card);
    overflow:hidden;
    transition:border-color var(--ease),background-color var(--ease);
  }
  .faq-item.is-open{border-color:rgba(47,216,182,.28);background:var(--card-hi);}
  .faq-q{
    width:100%;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 24px;
    background:transparent;border:none;
    text-align:left;
    font-size:16px;font-weight:700;color:var(--text-1);
    cursor:pointer;
  }
  .faq-q:hover{color:var(--primary-hover);}
  .faq-icon{
    flex:0 0 auto;width:28px;height:28px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    border:1px solid rgba(47,216,182,.4);
    color:var(--primary);
    font-size:16px;line-height:1;
    transition:transform var(--ease),color var(--ease),border-color var(--ease);
  }
  .faq-item.is-open .faq-icon{transform:rotate(45deg);}
  .faq-a{
    max-height:0;overflow:hidden;
    transition:max-height 260ms cubic-bezier(.4,0,.2,1);
  }
  .faq-a p{
    padding:0 24px 22px;
    font-size:15px;line-height:1.8;color:var(--text-2);
  }

  /* ---------- CTA 条 ---------- */
  .cta-band{
    position:relative;
    border-radius:var(--radius-card);
    border:1px solid var(--line);
    background:
      radial-gradient(520px 240px at 22% 0%, rgba(47,216,182,.2), transparent 70%),
      rgba(255,255,255,.04);
    padding:40px;
    display:flex;align-items:center;justify-content:space-between;gap:28px;
    box-shadow:var(--shadow-1);
    overflow:hidden;
  }
  .cta-band h2{font-size:26px;}
  .cta-band p{margin-top:10px;color:var(--text-3);font-size:15px;max-width:560px;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:96px;
    border-top:1px solid var(--line);
    background:rgba(7,12,20,.6);
    position:relative;
  }
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:6px;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='6'%3E%3Cpath d='M0 3h6v-3h6v3h6v3h6' fill='none' stroke='rgba(47,216,182,.16)' stroke-width='1'/%3E%3C/svg%3E");
    background-repeat:repeat-x;
    opacity:.6;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:40px;
    padding:64px 0 40px;
  }
  .footer-col h4{font-size:14px;color:var(--primary);margin-bottom:18px;font-weight:700;}
  .footer-brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start;}
  .footer-slogan{font-size:14px;color:var(--text-3);line-height:1.7;max-width:300px;}
  .footer-links{display:grid;gap:12px;}
  .footer-links a{font-size:14px;color:var(--text-3);}
  .footer-links a:hover{color:var(--primary);transform:translateX(-2px);}
  .footer-contact{display:grid;gap:14px;font-size:14px;color:var(--text-3);}
  .footer-contact span{display:flex;align-items:center;gap:10px;}
  .footer-contact svg{width:16px;height:16px;color:var(--primary);flex:0 0 auto;}
  .footer-bottom{
    border-top:1px solid var(--line);
    padding:22px 0 30px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:var(--text-3);
  }
  .footer-bottom a:hover{color:var(--primary);}

  .to-top{
    position:fixed;right:24px;bottom:28px;z-index:70;
    width:46px;height:46px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,.06);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    color:var(--text-1);
    opacity:0;visibility:hidden;transform:translateY(8px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease),border-color var(--ease);
    cursor:pointer;
  }
  .to-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{border-color:rgba(47,216,182,.5);color:var(--primary);}

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .container{padding:0 28px;}
  }
  @media (max-width:1023px){
    .section{padding:var(--sec-tablet) 0;}
    .nav-left,.nav-right{display:none;}
    .nav-inner{grid-template-columns:1fr auto 1fr;height:60px;}
    .nav-toggle{display:flex;justify-self:end;}
    .nav-logo{justify-self:center;}
    .desktop-cta{display:none;}
    .container{padding:0 24px;}
    .gallery{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 32px;}
    .section-title{font-size:26px;}
  }
  @media (max-width:767px){
    body{font-size:15.5px;}
    .section{padding:var(--sec-mobile) 0;}
    .container{padding:0 16px;}
    .page-hero{padding:40px 0 44px;}
    .page-lead{font-size:15.5px;}
    .steps::before{left:22px;}
    .step{grid-template-columns:44px 1fr;gap:16px;padding:16px 0;}
    .step-idx{width:44px;height:44px;font-size:15px;}
    .step-body{padding:20px;}
    .gallery{grid-template-columns:1fr;}
    .table-wrap{overflow-x:auto;}
    table{min-width:560px;}
    thead th,tbody td{padding:14px 16px;}
    .cta-band{flex-direction:column;align-items:flex-start;text-align:left;padding:30px 22px;}
    .cta-band .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
    .section-title{font-size:23px;}
  }
  @media (max-width:520px){
    .brand-text{font-size:17px;}
    .brand-mark{width:30px;height:30px;}
    .page-hero h1{font-size:clamp(26px,7vw,32px);}
    .anchor-nav a{font-size:13px;padding:8px 14px;}
  }

  @media (prefers-reduced-motion:reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category2 */
:root{
    --cloud-900:#070C14;
    --cloud-800:#0C1526;
    --teal:#2FD8B6;
    --teal-hover:#3FE3C2;
    --teal-deep:#1FB6D8;
    --dawn:#FF9A3C;
    --text-title:#EAF1F8;
    --text-body:#C6D3E1;
    --text-mute:#8FA1B6;
    --line:rgba(255,255,255,.08);
    --card-bg:rgba(255,255,255,.04);
    --card-bg-strong:rgba(255,255,255,.06);
    --radius-lg:18px;
    --radius-sm:12px;
    --shadow-card:0 14px 36px rgba(3,8,18,.55);
    --shadow-lift:0 18px 44px rgba(3,8,18,.7),0 0 0 1px rgba(47,216,182,.28);
    --ease:cubic-bezier(.4,0,.2,1);
    --dur:220ms;
    --section-gap:96px;
  }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; }
  body{
    margin:0;
    min-height:100vh;
    font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--text-body);
    background:
      radial-gradient(900px 620px at 8% -6%, rgba(47,216,182,.08), transparent 62%),
      linear-gradient(180deg,var(--cloud-900) 0%,var(--cloud-800) 100%);
    background-attachment:fixed;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    opacity:.02;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(/%23n)'/%3E%3C/svg%3E");
  }
  a{ color:inherit; text-decoration:none; transition:color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease); }
  img{ max-width:100%; display:block; }
  button,input,textarea,select{ font:inherit; color:inherit; }
  h1,h2,h3,h4{ color:var(--text-title); letter-spacing:-.01em; margin:0; font-weight:700; line-height:1.3; }
  p{ margin:0; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  :focus-visible{ outline:2px solid var(--teal); outline-offset:2px; border-radius:6px; }

  .container{
    width:100%;
    max-width:1240px;
    margin:0 auto;
    padding:0 32px;
    position:relative;
    z-index:1;
  }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
  }
  .site-header.scrolled{
    background:rgba(7,12,20,.72);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
  }
  .nav-wrap{
    max-width:1240px;
    margin:0 auto;
    padding:0 32px;
    height:72px;
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    gap:24px;
  }
  .nav-side{ display:flex; align-items:center; gap:30px; }
  .nav-left{ justify-content:flex-end; }
  .nav-right{ justify-content:flex-start; }
  .nav-link{
    position:relative;
    font-size:15px;
    color:var(--text-mute);
    padding:6px 2px;
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:-2px;
    width:0;
    height:2px;
    border-radius:2px;
    background:var(--teal);
    transform:translateX(-50%);
    transition:width var(--dur) var(--ease);
  }
  .nav-link:hover{ color:var(--text-title); }
  .nav-link:hover::after{ width:18px; }
  .nav-link.active{ color:var(--text-title); font-weight:600; }
  .nav-link.active::after{ width:18px; }

  .brand{ display:flex; align-items:center; gap:10px; padding:0 6px; }
  .brand-mark{ width:34px; height:34px; flex:0 0 auto; }
  .brand-text{
    font-size:19px;
    font-weight:800;
    letter-spacing:-.01em;
    color:var(--text-title);
    white-space:nowrap;
  }
  .brand:hover .brand-text{ color:var(--teal-hover); }

  .nav-toggle{
    display:none;
    width:44px;height:44px;
    border:1px solid var(--line);
    border-radius:12px;
    background:rgba(255,255,255,.03);
    cursor:pointer;
    position:relative;
    align-items:center;
    justify-content:center;
  }
  .nav-toggle span{
    display:block;
    position:absolute;
    left:50%;
    width:20px;height:2px;
    background:var(--text-title);
    border-radius:2px;
    transform:translateX(-50%);
    transition:transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
  }
  .nav-toggle span:nth-child(1){ top:15px; }
  .nav-toggle span:nth-child(2){ top:21px; }
  .nav-toggle span:nth-child(3){ top:27px; }
  .nav-toggle.open span:nth-child(1){ top:21px; transform:translateX(-50%) rotate(45deg); }
  .nav-toggle.open span:nth-child(2){ opacity:0; }
  .nav-toggle.open span:nth-child(3){ top:21px; transform:translateX(-50%) rotate(-45deg); }

  .mobile-panel{
    display:none;
    overflow:hidden;
    max-height:0;
    background:rgba(7,12,20,.96);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    transition:max-height 200ms var(--ease);
  }
  .mobile-panel.open{ max-height:640px; }
  .mobile-panel .container{ padding-top:8px; padding-bottom:24px; }
  .mobile-panel a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:52px;
    font-size:15px;
    color:var(--text-body);
    border-bottom:1px solid var(--line);
  }
  .mobile-panel a:hover{ color:var(--teal-hover); }
  .mobile-panel .mobile-label{
    font-size:12px;
    color:var(--teal);
    letter-spacing:.08em;
    padding:18px 0 6px;
  }
  .mobile-panel .btn{ margin-top:20px; width:100%; justify-content:center; }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    font-size:15px;
    font-weight:600;
    padding:12px 26px;
    border-radius:999px;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), filter var(--dur) var(--ease);
    white-space:nowrap;
  }
  .btn-sm{ padding:9px 20px; font-size:14px; }
  .btn-primary{
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    color:#04121A;
    font-weight:700;
    box-shadow:0 0 22px rgba(47,216,182,.35);
  }
  .btn-primary:hover{
    transform:translateY(-2px);
    box-shadow:0 0 32px rgba(47,216,182,.5);
    filter:brightness(1.06);
  }
  .btn-primary:active{ transform:translateY(1px); box-shadow:none; }
  .btn-ghost{
    background:transparent;
    border:1px solid rgba(47,216,182,.55);
    color:var(--teal);
    border-radius:12px;
    padding:12px 22px;
  }
  .btn-ghost:hover{ background:rgba(47,216,182,.08); border-color:var(--teal); }
  .btn-ghost:active{ transform:translateY(1px); }
  .btn[disabled]{ background:#3A4757; color:#8FA1B6; box-shadow:none; cursor:not-allowed; transform:none; }

  /* ============ 通用区块 ============ */
  .section{ padding-top:var(--section-gap); position:relative; z-index:1; }
  .section-head{ margin-bottom:28px; }
  .section-head h2{ font-size:clamp(24px,2.6vw,32px); font-weight:800; display:flex; align-items:center; gap:12px; }
  .section-head h2::before{
    content:"";
    width:4px;
    height:24px;
    border-radius:3px;
    background:linear-gradient(180deg,var(--teal),rgba(47,216,182,.25));
    flex:0 0 auto;
  }
  .section-sub{ color:var(--text-mute); font-size:15px; margin-top:10px; }

  .glass{
    background:var(--card-bg);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-card);
    position:relative;
    overflow:hidden;
  }
  .glass::before{
    content:"";
    position:absolute;
    inset:0 0 auto 0;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
  }

  .tag{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:12px;
    padding:4px 12px;
    border-radius:999px;
    background:rgba(47,216,182,.12);
    color:var(--teal);
    border:1px solid rgba(47,216,182,.22);
    white-space:nowrap;
  }
  .tag-dawn{
    background:rgba(255,154,60,.1);
    color:var(--dawn);
    border-color:rgba(255,154,60,.35);
  }

  /* ============ 面包屑 ============ */
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    color:var(--text-mute);
    padding-top:28px;
    flex-wrap:wrap;
  }
  .breadcrumb a:hover{ color:var(--teal-hover); }
  .breadcrumb .sep{ color:rgba(255,255,255,.2); }
  .breadcrumb .current{
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
    font-weight:600;
  }

  /* ============ 分类头部 ============ */
  .cat-hero{
    position:relative;
    padding:28px 0 0;
  }
  .cat-hero-bg{
    position:absolute;
    inset:0;
    border-radius:0 0 28px 28px;
    overflow:hidden;
    z-index:0;
    pointer-events:none;
  }
  .cat-hero-bg img{
    width:100%;height:100%;
    object-fit:cover;
    opacity:.20;
    filter:saturate(.7);
  }
  .cat-hero-bg::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(7,12,20,.55),rgba(7,12,20,.96) 78%);
  }
  .cat-hero .container{ position:relative; z-index:1; }
  .cat-hero h1{
    font-size:clamp(30px,4.2vw,50px);
    font-weight:800;
    margin-top:22px;
    max-width:900px;
  }
  .cat-hero h1 .accent{
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .cat-lead{
    margin-top:20px;
    max-width:820px;
    font-size:17px;
    color:var(--text-body);
  }
  .cat-lead p + p{ margin-top:10px; }
  .anchor-nav{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:28px;
  }
  .anchor-nav a{
    font-size:13px;
    padding:8px 16px;
    border-radius:999px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.03);
    color:var(--text-mute);
  }
  .anchor-nav a:hover{
    color:var(--teal-hover);
    border-color:rgba(47,216,182,.4);
    background:rgba(47,216,182,.08);
    transform:translateY(-2px);
  }

  .stat-strip{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:16px;
    margin-top:34px;
  }
  .stat-item{
    padding:18px 20px;
    border-radius:var(--radius-sm);
    background:var(--card-bg);
    border:1px solid var(--line);
  }
  .stat-item strong{
    display:block;
    font-size:24px;
    color:var(--teal);
    font-weight:800;
    letter-spacing:-.01em;
  }
  .stat-item span{ font-size:13px; color:var(--text-mute); }

  /* ============ 左参数卡 + 右说明 ============ */
  .split{
    display:grid;
    grid-template-columns:4fr 8fr;
    gap:24px;
    align-items:start;
  }
  .param-card{
    padding:28px 26px;
    position:sticky;
    top:96px;
  }
  .param-card h3{ font-size:19px; margin-bottom:6px; }
  .param-card .param-desc{ font-size:13px; color:var(--text-mute); margin-bottom:20px; }
  .param-list li{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:12px;
    padding:12px 0;
    border-bottom:1px dashed var(--line);
    font-size:14px;
  }
  .param-list li:last-child{ border-bottom:none; }
  .param-list .k{ color:var(--text-mute); }
  .param-list .v{ color:var(--text-title); font-weight:600; text-align:right; }
  .param-list .v.teal{ color:var(--teal); }

  .explain-block{
    padding:28px 30px;
    margin-bottom:24px;
  }
  .explain-block h3{
    font-size:20px;
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:14px;
  }
  .explain-block h3 .idx{
    font-size:12px;
    font-weight:700;
    color:#04121A;
    background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
    width:26px;height:26px;
    border-radius:8px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    flex:0 0 auto;
  }
  .explain-block p + p{ margin-top:12px; }
  .explain-block ul.dot{ margin-top:14px; }
  .explain-block ul.dot li{
    position:relative;
    padding-left:20px;
    font-size:15px;
    color:var(--text-body);
    margin-bottom:8px;
  }
  .explain-block ul.dot li::before{
    content:"";
    position:absolute;
    left:2px;top:11px;
    width:7px;height:7px;
    border-radius:2px;
    background:rgba(47,216,182,.7);
  }

  /* ============ 配图区 ============ */
  .figure-grid{
    display:grid;
    grid-template-columns:1.25fr 1fr 1fr;
    gap:20px;
    align-items:end;
  }
  .figure-card{
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--card-bg);
    box-shadow:var(--shadow-card);
    transition:transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }
  .figure-card:hover{
    transform:translateY(-4px);
    box-shadow:var(--shadow-lift);
    border-color:rgba(47,216,182,.28);
  }
  .figure-card .ratio{ position:relative; width:100%; padding-top:66%; }
  .figure-card .ratio img{
    position:absolute;inset:0;
    width:100%;height:100%;
    object-fit:cover;
    transition:transform var(--dur) var(--ease);
  }
  .figure-card:hover .ratio img{ transform:scale(1.04); }
  .figure-card figcaption{
    padding:14px 16px 18px;
    font-size:13px;
    color:var(--text-mute);
    line-height:1.6;
  }
  .figure-card.tilt-left{ transform:rotate(-1.2deg); }
  .figure-card.tilt-right{ transform:rotate(1.4deg); }
  .figure-card.tilt-left:hover,
  .figure-card.tilt-right:hover{ transform:translateY(-4px) rotate(0deg); }

  /* ============ 清单表 ============ */
  .table-wrap{
    padding:8px 8px 4px;
    overflow-x:auto;
  }
  table.sec-table{
    width:100%;
    border-collapse:collapse;
    min-width:640px;
  }
  table.sec-table th,
  table.sec-table td{
    text-align:left;
    padding:16px 18px;
    font-size:14px;
    border-bottom:1px solid var(--line);
    vertical-align:top;
  }
  table.sec-table thead th{
    font-size:13px;
    color:var(--teal);
    background:rgba(47,216,182,.1);
    font-weight:600;
    letter-spacing:.02em;
  }
  table.sec-table thead th:first-child{ border-radius:12px 0 0 12px; }
  table.sec-table thead th:last-child{ border-radius:0 12px 12px 0; }
  table.sec-table tbody tr:hover{ background:rgba(255,255,255,.03); }
  table.sec-table tbody td:first-child{ color:var(--text-title); font-weight:600; }
  table.sec-table tbody tr:last-child td{ border-bottom:none; }

  /* ============ FAQ ============ */
  .faq-list{
    max-width:880px;
    margin:0 auto;
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  .faq-item{
    border-radius:var(--radius-lg);
    border:1px solid var(--line);
    background:var(--card-bg);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    overflow:hidden;
    transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
  }
  .faq-item.open{
    border-color:rgba(47,216,182,.28);
    background:rgba(255,255,255,.06);
  }
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    text-align:left;
    background:transparent;
    border:none;
    cursor:pointer;
    padding:20px 24px;
    font-size:16px;
    font-weight:700;
    color:var(--text-title);
    line-height:1.5;
  }
  .faq-icon{
    flex:0 0 auto;
    width:28px;height:28px;
    border-radius:50%;
    border:1px solid var(--line);
    display:inline-flex;
    align-items:center;
    justify-content:center;
    color:var(--text-mute);
    font-size:17px;
    line-height:1;
    transition:transform var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }
  .faq-item.open .faq-icon{
    transform:rotate(45deg);
    color:var(--teal);
    border-color:rgba(47,216,182,.5);
  }
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height 260ms var(--ease);
  }
  .faq-a-inner{
    padding:0 24px 22px;
    font-size:15px;
    line-height:1.8;
    color:var(--text-body);
  }

  /* ============ CTA 条 ============ */
  .cta-bar{
    position:relative;
    padding:40px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    border-radius:var(--radius-lg);
    overflow:hidden;
  }
  .cta-bar::after{
    content:"";
    position:absolute;
    inset:-40% -10% auto -10%;
    height:280px;
    background:radial-gradient(closest-side,rgba(47,216,182,.2),transparent 72%);
    pointer-events:none;
  }
  .cta-bar h2{ font-size:clamp(22px,2.4vw,28px); font-weight:800; }
  .cta-bar p{ margin-top:10px; font-size:15px; color:var(--text-body); max-width:640px; }
  .cta-actions{ display:flex; gap:14px; flex-wrap:wrap; position:relative; z-index:1; }

  /* ============ 表单 ============ */
  .form-panel{ padding:32px 30px; margin-top:24px; }
  .form-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
  }
  .field{ display:flex; flex-direction:column; gap:8px; }
  .field.full{ grid-column:1 / -1; }
  .field label{
    font-size:13px;
    color:var(--text-mute);
  }
  .field label .req{ color:var(--teal); margin-left:4px; }
  .field input,
  .field textarea,
  .field select{
    width:100%;
    background:rgba(255,255,255,.03);
    border:1px solid var(--line);
    border-radius:var(--radius-sm);
    padding:12px 14px;
    font-size:15px;
    color:var(--text-title);
    transition:border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background-color var(--dur) var(--ease);
  }
  .field textarea{ min-height:120px; resize:vertical; }
  .field input::placeholder,
  .field textarea::placeholder{ color:rgba(143,161,182,.7); }
  .field input:focus,
  .field textarea:focus,
  .field select:focus{
    outline:none;
    border-color:var(--teal);
    box-shadow:0 0 0 3px rgba(47,216,182,.15);
    background:rgba(255,255,255,.05);
  }
  .field.error input,
  .field.error textarea{ border-color:var(--dawn); }
  .field .err-msg{ font-size:12px; color:var(--dawn); display:none; }
  .field.error .err-msg{ display:block; }
  .form-actions{ display:flex; justify-content:flex-end; margin-top:22px; }

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:var(--section-gap);
    position:relative;
    z-index:1;
    background:linear-gradient(180deg,rgba(7,12,20,.4),rgba(7,12,20,.9));
  }
  .site-footer::before{
    content:"";
    position:absolute;
    top:0;left:0;right:0;
    height:1px;
    background:linear-gradient(90deg,transparent,rgba(47,216,182,.35),transparent);
  }
  .site-footer .reticle{
    height:6px;
    background-image:linear-gradient(90deg,rgba(47,216,182,.18) 1px,transparent 1px),
                     linear-gradient(0deg,rgba(47,216,182,.18) 1px,transparent 1px);
    background-size:18px 6px;
    opacity:.5;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:32px;
    padding:56px 0 40px;
  }
  .footer-col h4{
    font-size:14px;
    color:var(--teal);
    font-weight:600;
    margin-bottom:16px;
    letter-spacing:.02em;
  }
  .footer-brand{ display:flex; flex-direction:column; gap:16px; }
  .footer-slogan{ font-size:14px; color:var(--text-mute); max-width:280px; }
  .footer-links{ display:flex; flex-direction:column; gap:10px; }
  .footer-links a{
    font-size:14px;
    color:var(--text-mute);
    width:fit-content;
  }
  .footer-links a:hover{ color:var(--teal-hover); transform:translateX(2px); }
  .footer-contact{ display:flex; flex-direction:column; gap:12px; font-size:14px; color:var(--text-mute); }
  .footer-contact .row{ display:flex; align-items:center; gap:10px; }
  .footer-contact svg{ width:16px;height:16px; flex:0 0 auto; color:var(--teal); }
  .footer-qr{
    width:88px;height:88px;
    border-radius:12px;
    border:1px dashed var(--line);
    background:rgba(255,255,255,.03);
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:12px;
    color:var(--text-mute);
    text-align:center;
    line-height:1.4;
  }
  .footer-bottom{
    border-top:1px solid var(--line);
    padding:22px 0 34px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-mute);
  }
  .footer-bottom a:hover{ color:var(--teal-hover); }

  /* ============ 返回顶部 ============ */
  .to-top{
    position:fixed;
    right:24px;
    bottom:28px;
    width:46px;height:46px;
    border-radius:50%;
    border:1px solid var(--line);
    background:rgba(255,255,255,.05);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    color:var(--teal);
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    opacity:0;
    pointer-events:none;
    transform:translateY(10px);
    transition:opacity var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
    z-index:70;
  }
  .to-top.show{ opacity:1; pointer-events:auto; transform:translateY(0); }
  .to-top:hover{ border-color:rgba(47,216,182,.5); }

  /* ============ 响应式 ============ */
  @media (max-width:1279px){
    .container{ padding:0 24px; }
    .nav-wrap{ padding:0 24px; gap:16px; }
    .nav-side{ gap:20px; }
  }
  @media (max-width:1023px){
    :root{ --section-gap:72px; }
    .nav-side{ display:none; }
    .nav-wrap{
      grid-template-columns:44px 1fr 44px;
      height:60px;
      padding:0 16px;
    }
    .nav-wrap .brand{ justify-self:center; }
    .brand-mark{ width:30px;height:30px; }
    .brand-text{ font-size:17px; }
    .nav-toggle{ display:inline-flex; justify-self:end; }
    .mobile-panel{ display:block; }
    .container{ padding:0 24px; }
    .split{ grid-template-columns:1fr; }
    .param-card{ position:static; }
    .stat-strip{ grid-template-columns:repeat(2,1fr); }
    .figure-grid{ grid-template-columns:1fr 1fr; }
    .figure-card.tilt-left,
    .figure-card.tilt-right{ transform:none; }
    .footer-grid{ grid-template-columns:1fr 1fr; gap:28px; }
  }
  @media (max-width:639px){
    :root{ --section-gap:56px; }
    body{ font-size:15px; }
    .container{ padding:0 16px; }
    .cat-hero h1{ font-size:clamp(26px,7.6vw,34px); }
    .cat-lead{ font-size:15.5px; }
    .stat-strip{ grid-template-columns:1fr 1fr; gap:12px; }
    .stat-item{ padding:14px 16px; }
    .stat-item strong{ font-size:20px; }
    .explain-block{ padding:22px 20px; }
    .param-card{ padding:22px 20px; }
    .figure-grid{ grid-template-columns:1fr; }
    .cta-bar{
      flex-direction:column;
      align-items:flex-start;
      padding:28px 22px;
    }
    .cta-actions{ width:100%; }
    .cta-actions .btn{ width:100%; }
    .form-grid{ grid-template-columns:1fr; }
    .form-actions{ justify-content:stretch; }
    .form-actions .btn{ width:100%; }
    .footer-grid{ grid-template-columns:1fr; padding:40px 0 28px; }
    .footer-bottom{ flex-direction:column; align-items:flex-start; }
    .faq-q{ padding:16px 18px; font-size:15px; }
    .faq-a-inner{ padding:0 18px 18px; }
    .to-top{ right:16px; bottom:18px; }
    .breadcrumb{ font-size:13px; }
  }

/* roulang page: category4 */
:root{
  --bg-top:#070C14;
  --bg-bottom:#0C1526;
  --teal:#2FD8B6;
  --teal-hover:#3FE3C2;
  --dawn:#FF9A3C;
  --title:#EAF1F8;
  --text:#C6D3E1;
  --muted:#8FA1B6;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(47,216,182,.28);
  --card:rgba(255,255,255,.04);
  --card-strong:rgba(255,255,255,.06);
  --input-bg:rgba(255,255,255,.03);
  --disabled:#3A4757;
  --radius-card:18px;
  --radius-ctrl:12px;
  --shadow-card:0 14px 36px rgba(3,8,18,.55);
  --shadow-hover:0 20px 46px rgba(3,8,18,.68);
  --ease:220ms cubic-bezier(.4,0,.2,1);
  --sec-gap:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100%;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 8% -6%, rgba(47,216,182,.08), transparent 62%),
    linear-gradient(180deg,var(--bg-top) 0%,var(--bg-bottom) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.02;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/></filter><rect width='120' height='120' filter='url(/%23n)'/></svg>");
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease),opacity var(--ease);}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--title);font-weight:700;letter-spacing:-.01em;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(47,216,182,.28);color:#04121A;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:var(--sec-gap) 0;}
.section-tight{padding:56px 0;}
.sec-head{margin-bottom:28px;}
.sec-title{
  font-size:clamp(24px,2.6vw,32px);
  display:flex;
  align-items:center;
  gap:12px;
}
.sec-title::before{
  content:"";
  display:block;
  width:4px;
  height:24px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--teal),rgba(47,216,182,.25));
  flex:0 0 auto;
}
.sec-sub{margin-top:10px;color:var(--muted);font-size:15px;max-width:760px;}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0;
  cursor:pointer;
  font-weight:700;
  font-size:15px;
  line-height:1;
  padding:14px 26px;
  border-radius:999px;
  transition:transform var(--ease),box-shadow var(--ease),filter var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  color:#04121A;
  box-shadow:0 0 22px rgba(47,216,182,.35);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(47,216,182,.5);
  filter:brightness(1.06);
}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;
  color:var(--teal);
  border:1px solid var(--teal);
  border-radius:var(--radius-ctrl);
  padding:13px 24px;
}
.btn-ghost:hover{background:rgba(47,216,182,.08);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:2px;
}
.btn[disabled],.btn.is-disabled{background:var(--disabled);color:rgba(255,255,255,.5);box-shadow:none;cursor:not-allowed;filter:none;transform:none;}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  line-height:1;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(47,216,182,.12);
  color:var(--teal);
  border:1px solid rgba(47,216,182,.18);
  white-space:nowrap;
}
.tag-dawn{
  background:rgba(255,154,60,.12);
  color:var(--dawn);
  border-color:rgba(255,154,60,.32);
}
.glass{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);
  position:relative;
  overflow:hidden;
}
.glass::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
  opacity:.5;
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease),background-color var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-hover);
  background:var(--card-strong);
}
.hairline{
  height:1px;
  border:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent);
}
.eyebrow{font-size:13px;color:var(--muted);}
.num{color:var(--teal);font-weight:800;font-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  transition:background-color var(--ease),border-color var(--ease),backdrop-filter var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(7,12,20,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-wrap{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:28px;
  height:72px;
}
.nav-side{display:flex;align-items:center;gap:30px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--muted);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-2px;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--teal);
  transform:translateX(-50%);
  transition:width var(--ease);
}
.nav-link:hover{color:var(--title);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--title);}
.nav-link.active::after{width:18px;}
.nav-cta{margin-left:6px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  color:var(--title);
  font-size:17px;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-mark{width:32px;height:32px;flex:0 0 auto;}
.brand:hover .brand-text{color:var(--teal-hover);}
.brand-text{transition:color var(--ease);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:var(--radius-ctrl);
  background:var(--card);
  cursor:pointer;
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:12px;
  width:20px;height:2px;
  background:var(--title);
  border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle span:nth-child(1){top:15px;}
.nav-toggle span:nth-child(2){top:21px;}
.nav-toggle span:nth-child(3){top:27px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

.mobile-panel{
  display:none;
  overflow:hidden;
  max-height:0;
  transition:max-height 200ms cubic-bezier(.4,0,.2,1);
  background:rgba(7,12,20,.96);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.mobile-panel.open{max-height:720px;}
.mobile-panel .mp-inner{padding:8px 0 20px;}
.mp-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:52px;
  padding:0 4px;
  font-size:16px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.mp-link:last-of-type{border-bottom:0;}
.mp-link:hover,.mp-link.active{color:var(--teal);}
.mp-cta{margin-top:16px;}
.mp-label{
  font-size:12px;
  color:var(--teal);
  letter-spacing:.08em;
  margin:18px 0 4px;
}

/* ---------- 分类头部 ---------- */
.cat-hero{
  position:relative;
  padding:56px 0 64px;
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(700px 380px at 82% 12%, rgba(47,216,182,.10), transparent 68%);
  pointer-events:none;
}
.cat-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.82fr);
  gap:48px;
  align-items:center;
  position:relative;
  z-index:1;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
  margin-bottom:20px;
  flex-wrap:wrap;
}
.crumb a:hover{color:var(--teal);}
.crumb .sep{opacity:.5;}
.crumb .current{
  background:linear-gradient(100deg,#2FD8B6,#7FE7D2);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:700;
}
.cat-badge{margin-bottom:18px;}
.cat-hero h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.2;
  margin-bottom:20px;
  letter-spacing:-.02em;
}
.cat-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.lead{font-size:16.5px;color:var(--text);max-width:620px;}
.lead + .lead{margin-top:12px;}
.anchor-nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:28px;
}
.anchor-nav a{
  font-size:14px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--muted);
}
.anchor-nav a:hover{
  color:var(--teal);
  border-color:var(--line-strong);
  transform:translateY(-2px);
}
.cat-visual{position:relative;}
.cat-visual .shot{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/11;
  position:relative;
}
.cat-visual .shot img{width:100%;height:100%;object-fit:cover;filter:saturate(.92);}
.cat-visual .shot::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.15) 0%,rgba(7,12,20,.55) 100%);
}
.visual-badge{
  position:absolute;
  left:-14px;
  bottom:-18px;
  padding:16px 20px;
  border-radius:var(--radius-card);
  background:rgba(12,21,38,.86);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  max-width:220px;
}
.visual-badge .vb-num{font-size:26px;font-weight:800;color:var(--teal);line-height:1.1;}
.visual-badge .vb-txt{font-size:12px;color:var(--muted);margin-top:6px;line-height:1.5;}
.visual-strip{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
  margin-top:34px;
}
.visual-strip div{
  border:1px solid var(--line);
  border-radius:var(--radius-ctrl);
  background:var(--card);
  padding:12px 14px;
  font-size:13px;
  color:var(--muted);
}
.visual-strip strong{display:block;color:var(--title);font-size:15px;margin-bottom:2px;}

/* ---------- 对照清单（D 版式） ---------- */
.compare-head{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  padding:0 0 14px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.compare-head span{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--teal);
}
.compare-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  transition:background-color var(--ease);
}
.compare-row:last-child{border-bottom:0;}
.compare-row:hover{background:rgba(255,255,255,.02);}
.compare-cell{display:flex;gap:14px;align-items:flex-start;}
.compare-idx{
  flex:0 0 auto;
  width:30px;height:30px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:800;
  color:var(--teal);
  border:1px solid rgba(47,216,182,.32);
  background:rgba(47,216,182,.06);
}
.compare-cell h3{font-size:16.5px;margin-bottom:4px;}
.compare-cell p{font-size:14.5px;color:var(--muted);line-height:1.75;}
.compare-cell .fix{color:var(--text);}

/* ---------- 配图区 ---------- */
.gallery{
  display:grid;
  grid-template-columns:1.25fr 1fr 1fr;
  gap:20px;
  align-items:end;
}
.g-item{
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),border-color var(--ease);
  position:relative;
  background:var(--card);
}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease);}
.g-item:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.g-item:hover img{transform:scale(1.04);}
.g-item.tall{aspect-ratio:16/11;}
.g-item.small{aspect-ratio:16/12;}
.g-item .g-cap{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:14px 16px;
  font-size:13px;
  color:var(--mist-title,#EAF1F8);
  background:linear-gradient(180deg,transparent,rgba(7,12,20,.9));
}

/* ---------- 表格 ---------- */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--card);
  box-shadow:var(--shadow-card);
}
table{width:100%;border-collapse:collapse;min-width:640px;}
thead th{
  text-align:left;
  font-size:13.5px;
  font-weight:700;
  color:var(--teal);
  background:rgba(47,216,182,.10);
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
tbody td{
  padding:16px 20px;
  font-size:14.5px;
  color:var(--text);
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
tbody tr:last-child td{border-bottom:0;}
tbody tr{transition:background-color var(--ease);}
tbody tr:hover{background:rgba(255,255,255,.025);}
tbody td:first-child{color:var(--title);font-weight:600;}
.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch;}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--card);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color var(--ease),background-color var(--ease);
}
.faq-item.open{
  border-color:var(--line-strong);
  background:var(--card-strong);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 22px;
  background:transparent;
  border:0;
  cursor:pointer;
  text-align:left;
  font-size:16px;
  font-weight:700;
  color:var(--title);
}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid rgba(47,216,182,.35);
  color:var(--teal);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  line-height:1;
  transition:transform var(--ease),background-color var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(47,216,182,.14);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms cubic-bezier(.4,0,.2,1);
}
.faq-a-inner{
  padding:0 22px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
}
.faq-a-inner strong{color:var(--text);font-weight:600;}

/* ---------- CTA 条 ---------- */
.cta-band{
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:
    radial-gradient(600px 260px at 12% 0%, rgba(47,216,182,.20), transparent 70%),
    rgba(255,255,255,.04);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:8px;}
.cta-band p{color:var(--muted);font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec-gap);
  padding:64px 0 0;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(7,12,20,.4),rgba(7,12,20,.9));
  position:relative;
  z-index:1;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:6px;
  background-image:linear-gradient(90deg,rgba(255,255,255,.10) 0 8px,transparent 8px 16px);
  background-size:16px 6px;
  opacity:.35;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-col h4{
  font-size:14px;
  color:var(--teal);
  margin-bottom:18px;
  font-weight:700;
  letter-spacing:.02em;
}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-slogan{font-size:14px;color:var(--muted);line-height:1.7;max-width:280px;}
.footer-links{display:flex;flex-direction:column;gap:12px;}
.footer-links a{font-size:14px;color:var(--muted);}
.footer-links a:hover{color:var(--teal);transform:translateX(-2px);}
.footer-contact{display:flex;flex-direction:column;gap:14px;}
.footer-contact span{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--muted);
}
.footer-contact svg{width:16px;height:16px;color:var(--teal);flex:0 0 auto;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--muted);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(12,21,38,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--teal);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transform:translateY(8px);
  transition:opacity var(--ease),transform var(--ease),border-color var(--ease);
  z-index:70;
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{border-color:var(--line-strong);transform:translateY(-2px);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 24px;}
  :root{--sec-gap:80px;}
}
@media (max-width:1023px){
  .nav-wrap{height:60px;grid-template-columns:auto 1fr auto;}
  .nav-side{display:none;}
  .nav-toggle{display:block;grid-column:3;}
  .brand{grid-column:2;justify-self:center;}
  .mobile-panel{display:block;}
  .cat-grid{grid-template-columns:1fr;gap:36px;}
  .cat-visual .shot{aspect-ratio:16/9;}
  .visual-badge{left:16px;bottom:-16px;}
  .compare-head,.compare-row{grid-template-columns:1fr;}
  .compare-head span:last-child{display:none;}
  .compare-row{gap:14px;padding:20px 0;}
  .gallery{grid-template-columns:1fr 1fr;align-items:stretch;}
  .gallery .g-item:first-child{grid-column:span 2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  :root{--sec-gap:72px;}
}
@media (max-width:639px){
  .container{padding:0 16px;}
  :root{--sec-gap:56px;}
  .cat-hero{padding:36px 0 48px;}
  .cat-hero h1{font-size:clamp(28px,7.4vw,34px);}
  .lead{font-size:15.5px;}
  .visual-strip{grid-template-columns:1fr;}
  .gallery{grid-template-columns:1fr;}
  .gallery .g-item:first-child{grid-column:span 1;}
  .cta-band{padding:28px 20px;flex-direction:column;align-items:flex-start;text-align:left;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:15px;padding:18px;}
  .faq-a-inner{padding:0 18px 18px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category5 */
:root{
  --bg-1:#070C14;
  --bg-2:#0C1526;
  --primary:#2FD8B6;
  --primary-hover:#3FE3C2;
  --accent:#FF9A3C;
  --text-1:#EAF1F8;
  --text-2:#C6D3E1;
  --text-3:#8FA1B6;
  --line:rgba(255,255,255,.08);
  --card-bg:rgba(255,255,255,.04);
  --card-bg-strong:rgba(255,255,255,.06);
  --radius-card:18px;
  --radius-ctl:12px;
  --shadow-1:0 14px 36px rgba(3,8,18,.55);
  --shadow-2:0 22px 48px rgba(3,8,18,.7), 0 0 0 1px rgba(47,216,182,.28);
  --ease:cubic-bezier(.4,0,.2,1);
  --dur:220ms;
  --container:1240px;
  --section-y:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-2);
  background:
    radial-gradient(900px 600px at 8% 0%, rgba(47,216,182,.08), transparent 62%),
    linear-gradient(180deg,var(--bg-1) 0%, var(--bg-2) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(/%23n)' opacity='0.035'/%3E%3C/svg%3E");
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease),transform var(--dur) var(--ease);}
a:hover{color:var(--primary);}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.28;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(47,216,182,.28);color:#04121A;}
body::-webkit-scrollbar{width:10px;}
body::-webkit-scrollbar-track{background:#070C14;}
body::-webkit-scrollbar-thumb{background:rgba(47,216,182,.28);border-radius:99px;}
body::-webkit-scrollbar-thumb:hover{background:rgba(47,216,182,.45);}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.section{padding:var(--section-y) 0;}
.section-tight{padding:64px 0;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  transition:background var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease),border-color var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(7,12,20,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  gap:24px;
}
.nav-side{display:flex;align-items:center;gap:32px;flex:1 1 0;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;gap:28px;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--text-3);
  padding:6px 2px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  transform:translateX(-50%);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--text-1);font-weight:600;}
.nav-link.active::after{width:18px;}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{width:34px;height:34px;flex:0 0 auto;}
.brand-text{
  font-size:19px;
  font-weight:800;
  color:var(--text-1);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover .brand-text{color:var(--primary-hover);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  font-size:15px;
  font-weight:700;
  padding:12px 26px;
  line-height:1;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  color:#04121A;
  box-shadow:0 0 22px rgba(47,216,182,.35);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 32px rgba(47,216,182,.55);
  filter:brightness(1.06);
  color:#04121A;
}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;
  border:1px solid var(--primary);
  color:var(--primary);
  border-radius:var(--radius-ctl);
}
.btn-ghost:hover{background:rgba(47,216,182,.08);color:var(--primary-hover);border-color:var(--primary-hover);}
.btn-sm{padding:9px 18px;font-size:14px;}
.nav-cta{margin-left:6px;}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:var(--radius-ctl);
  border:1px solid var(--line);
  background:var(--card-bg);
}
.nav-toggle span{
  display:block;width:20px;height:2px;background:var(--text-1);border-radius:2px;
  position:relative;transition:background var(--dur) var(--ease);
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--text-1);border-radius:2px;
  transition:transform var(--dur) var(--ease),top var(--dur) var(--ease);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg);}
.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg);}

.mobile-panel{
  display:none;
  overflow:hidden;
  max-height:0;
  transition:max-height 200ms var(--ease);
  border-top:1px solid transparent;
}
.mobile-panel.is-open{
  max-height:640px;
  border-top-color:var(--line);
  background:rgba(7,12,20,.94);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.mobile-inner{padding:8px 16px 20px;}
.mobile-inner .m-label{
  font-size:12px;color:var(--primary);letter-spacing:.08em;padding:16px 4px 8px;font-weight:700;
}
.mobile-inner a.m-link{
  display:flex;align-items:center;
  min-height:52px;
  padding:0 4px;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.mobile-inner a.m-link.active{color:var(--primary);font-weight:700;}
.mobile-cta{margin-top:18px;width:100%;}

/* ============ 分类头部 ============ */
.page-hero{
  position:relative;
  padding:56px 0 0;
  overflow:hidden;
}
.page-hero-bg{
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center right;
  opacity:.22;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 92%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 92%);
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.55),rgba(7,12,20,.96));
}
.page-hero .container{position:relative;z-index:2;}

.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-3);
  margin-bottom:22px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  font-weight:700;
}

.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.06em;
  color:var(--accent);
  border:1px solid rgba(255,154,60,.42);
  background:rgba(255,154,60,.07);
  padding:6px 14px;border-radius:999px;
  margin-bottom:20px;
}
.page-hero h1{
  font-size:clamp(30px,4.2vw,50px);
  max-width:900px;
  margin-bottom:20px;
}
.page-hero h1 em{
  font-style:normal;
  background:linear-gradient(100deg,#2FD8B6,#1FB6D8);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  max-width:760px;
  font-size:17px;
  color:var(--text-2);
  line-height:1.85;
}
.hero-lead + .hero-lead{margin-top:12px;}

.anchor-nav{
  display:flex;flex-wrap:wrap;gap:10px;
  margin:34px 0 0;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.anchor-nav a{
  font-size:13px;
  color:var(--text-3);
  border:1px solid var(--line);
  background:var(--card-bg);
  border-radius:999px;
  padding:8px 16px;
}
.anchor-nav a:hover{color:var(--primary);border-color:rgba(47,216,182,.4);transform:translateY(-2px);}

/* ============ 通用标题 ============ */
.sec-head{margin-bottom:32px;}
.sec-title{
  display:flex;align-items:flex-start;gap:12px;
  font-size:clamp(24px,2.6vw,32px);
  margin-bottom:14px;
}
.sec-title::before{
  content:"";flex:0 0 auto;
  width:4px;height:26px;margin-top:6px;
  border-radius:2px;
  background:linear-gradient(180deg,#2FD8B6,#1FB6D8);
}
.sec-desc{max-width:820px;color:var(--text-3);font-size:15.5px;}

/* ============ 卡片瀑布两列 ============ */
.masonry{
  column-count:2;
  column-gap:24px;
}
.masonry .m-card{
  break-inside:avoid;
  margin-bottom:24px;
}
.m-card{
  position:relative;
  background:var(--card-bg);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-1);
  padding:26px;
  overflow:hidden;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.m-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.m-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,216,182,.28);
  box-shadow:var(--shadow-2);
  background:var(--card-bg-strong);
}
.m-card h3{font-size:20px;margin-bottom:10px;}
.m-card p{font-size:15px;color:var(--text-2);}
.m-card .m-tag{
  display:inline-block;
  font-size:12px;
  color:var(--primary);
  background:rgba(47,216,182,.12);
  border-radius:999px;
  padding:4px 12px;
  margin-bottom:14px;
}
.m-list{margin-top:16px;display:grid;gap:10px;}
.m-list li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  color:var(--text-2);
}
.m-list li::before{
  content:"";
  position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:2px;
  background:rgba(47,216,182,.85);
  transform:rotate(45deg);
}
.m-metric{
  display:flex;align-items:baseline;gap:10px;
  margin-top:18px;padding-top:16px;
  border-top:1px dashed var(--line);
}
.m-metric b{font-size:28px;color:var(--primary);font-weight:800;letter-spacing:-.02em;}
.m-metric span{font-size:13px;color:var(--text-3);}

/* ============ 配图区 ============ */
.gallery{
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:24px;
  align-items:stretch;
}
.gallery-item{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  aspect-ratio:16/10;
  background:#0A1120;
}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;
  transition:transform var(--dur) var(--ease);
}
.gallery-item:hover img{transform:scale(1.04);}
.gallery-item figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:16px 18px;
  font-size:13.5px;
  color:var(--text-1);
  background:linear-gradient(180deg,transparent,rgba(7,12,20,.88));
}
.gallery-stack{
  display:grid;
  grid-template-rows:1fr 1fr;
  gap:24px;
}

/* ============ 参数表 ============ */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--card-bg);
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
table.spec{width:100%;border-collapse:collapse;}
table.spec th,table.spec td{
  padding:16px 20px;
  text-align:left;
  font-size:14.5px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.spec thead th{
  background:rgba(47,216,182,.1);
  color:var(--text-1);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
}
table.spec tbody tr:last-child td{border-bottom:0;}
table.spec tbody tr:hover{background:rgba(255,255,255,.03);}
table.spec td:first-child{color:var(--text-1);font-weight:600;width:26%;}
.badge-status{
  display:inline-block;
  font-size:12px;
  border-radius:999px;
  padding:3px 10px;
  color:var(--primary);
  background:rgba(47,216,182,.12);
}
.badge-status.warn{color:var(--accent);background:rgba(255,154,60,.12);}

/* ============ FAQ ============ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:var(--card-bg);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.faq-item.is-open{
  border-color:rgba(47,216,182,.28);
  background:var(--card-bg-strong);
}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;
  padding:20px 24px;
  font-size:16px;
  font-weight:700;
  color:var(--text-1);
}
.faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--primary);
  font-size:16px;
  line-height:1;
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:rgba(47,216,182,.5);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height var(--dur) var(--ease);
}
.faq-a-inner{
  padding:0 24px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--card-bg);
  box-shadow:var(--shadow-1);
  padding:40px;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(600px 220px at 12% 0%, rgba(47,216,182,.2), transparent 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:10px;position:relative;}
.cta-band p{font-size:15px;color:var(--text-3);position:relative;max-width:620px;}
.cta-actions{position:relative;display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 表单 ============ */
.consult-panel{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  background:var(--card-bg);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:32px;
  box-shadow:var(--shadow-1);
}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:13px;color:var(--text-3);}
.field label .req{color:var(--primary);margin-left:4px;}
.field input,.field select,.field textarea{
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  border-radius:var(--radius-ctl);
  padding:12px 14px;
  font-size:15px;
  color:var(--text-1);
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease);
}
.field textarea{min-height:110px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:rgba(143,161,182,.7);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,216,182,.15);
}
.field.error input,.field.error textarea{border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,154,60,.12);}
.field .err-msg{font-size:12px;color:var(--accent);display:none;}
.field.error .err-msg{display:block;}
.form-actions{grid-column:1/-1;display:flex;justify-content:flex-end;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:32px;
  border-top:1px solid var(--line);
  background:rgba(7,12,20,.6);
  padding:64px 0 28px;
}
.site-footer::before{
  content:"";
  position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,216,182,.35),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand{display:flex;flex-direction:column;gap:16px;}
.footer-slogan{font-size:14px;color:var(--text-3);max-width:280px;line-height:1.8;}
.footer-col h4{
  font-size:14px;
  color:var(--primary);
  margin-bottom:18px;
  font-weight:700;
  letter-spacing:.02em;
}
.footer-links{display:grid;gap:12px;}
.footer-links a{font-size:14px;color:var(--text-3);display:inline-block;}
.footer-links a:hover{color:var(--primary);transform:translateX(-2px);}
.footer-contact{display:grid;gap:14px;font-size:14px;color:var(--text-3);}
.footer-contact .row{display:flex;align-items:center;gap:10px;}
.footer-contact svg{width:18px;height:18px;color:var(--primary);flex:0 0 auto;}
.qr-placeholder{
  width:88px;height:88px;border-radius:var(--radius-ctl);
  border:1px dashed var(--line);
  background:var(--card-bg);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--text-3);text-align:center;line-height:1.4;
}
.footer-bottom{
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:28px;
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:rgba(255,255,255,.06);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--text-1);
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease),border-color var(--dur) var(--ease);
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,216,182,.5);color:var(--primary);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--section-y:80px;}
}
@media (max-width:1023px){
  :root{--section-y:72px;}
  .container{padding:0 24px;}
  .nav-side{display:none;}
  .nav-toggle{display:flex;}
  .mobile-panel{display:block;}
  .header-inner{height:60px;justify-content:space-between;}
  .brand{position:absolute;left:50%;transform:translateX(-50%);}
  .site-header .header-inner{position:relative;}
  .gallery{grid-template-columns:1fr;}
  .gallery-stack{grid-template-rows:auto;grid-template-columns:1fr 1fr;}
  .masonry{column-count:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .masonry{column-count:1;}
  table.spec th,table.spec td{padding:13px 14px;font-size:14px;}
  table.spec td:first-child{width:36%;}
  .cta-band{flex-direction:column;align-items:flex-start;text-align:left;padding:32px 24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .consult-panel{grid-template-columns:1fr;padding:24px;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{width:100%;}
}
@media (max-width:639px){
  :root{--section-y:56px;}
  .container{padding:0 16px;}
  .page-hero{padding-top:36px;}
  .hero-lead{font-size:16px;}
  .gallery-stack{grid-template-columns:1fr;}
  .gallery-item{aspect-ratio:16/10;}
  .m-card{padding:22px;}
  .faq-q{padding:17px 18px;font-size:15px;}
  .faq-a-inner{padding:0 18px 20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:18px;}
}