/* roulang page: index */
:root{
  --bg-900:#05080F;
  --bg-800:#080E1C;
  --panel:rgba(255,255,255,.04);
  --panel-strong:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.08);
  --brand:#00E0B8;
  --brand-deep:#00B894;
  --brand-soft:rgba(0,224,184,.14);
  --accent:#FF9A3C;
  --text-1:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C96;
  --sidebar-w:240px;
  --container:1280px;
}
@media (min-width:1280px){ :root{ --sidebar-w:264px; } }

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  left:0; right:0; bottom:0;
  height:620px;
  background:radial-gradient(62% 100% at 50% 100%, rgba(0,224,184,.08), transparent 72%);
  pointer-events:none;
  z-index:0;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; cursor:pointer; border:0; background:none; color:inherit; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4,p{ margin:0; }
:focus-visible{ outline:2px solid var(--brand); outline-offset:2px; border-radius:6px; }

/* ---------- 布局骨架 ---------- */
.app-sidebar{
  position:fixed; top:0; left:0; bottom:0; width:var(--sidebar-w);
  display:none; flex-direction:column;
  padding:24px 18px 20px;
  background:rgba(5,8,15,.88);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-right:1px solid var(--line);
  z-index:60; overflow-y:auto;
}
@media (min-width:1024px){ .app-sidebar{ display:flex; } }

.brand{ display:flex; align-items:center; gap:12px; padding:0 6px 22px; }
.brand-mark{
  flex:0 0 auto; width:38px; height:38px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  background:linear-gradient(145deg, rgba(0,224,184,.22), rgba(0,224,184,.04));
  border:1px solid rgba(0,224,184,.35);
  box-shadow:0 0 22px -6px rgba(0,224,184,.55), inset 0 1px 0 rgba(255,255,255,.08);
  position:relative;
}
.brand-mark i{ color:var(--brand); font-size:16px; }
.brand-mark::after{
  content:""; position:absolute; inset:7px; border-radius:6px;
  border:1px dashed rgba(0,224,184,.35);
}
.brand-text{ font-size:15px; font-weight:700; letter-spacing:.01em; line-height:1.35; }

.side-label{
  font-size:12px; font-weight:500; color:var(--text-3);
  letter-spacing:.16em; padding:0 14px; margin-bottom:10px;
}
.side-nav{ display:flex; flex-direction:column; gap:4px; }
.side-link{
  position:relative; display:flex; align-items:center; gap:12px;
  padding:11px 14px; border-radius:12px; min-height:44px;
  color:var(--text-2); font-size:14.5px; font-weight:500;
  transition:background .18s ease-out, color .18s ease-out;
}
.side-link i{ width:18px; text-align:center; font-size:14px; color:var(--text-3); transition:color .18s ease-out; }
.side-link:hover{ background:var(--panel); color:var(--text-1); }
.side-link:hover i{ color:var(--brand); }
.side-link.is-active{ background:var(--panel-strong); color:var(--text-1); }
.side-link.is-active i{ color:var(--brand); }
.side-link.is-active::before{
  content:""; position:absolute; left:0; top:50%; transform:translateY(-50%);
  width:3px; height:20px; border-radius:0 3px 3px 0; background:var(--brand);
  box-shadow:0 0 12px rgba(0,224,184,.7);
}
.side-divider{ height:1px; background:var(--line); margin:18px 6px; }
.side-cta{
  padding:16px; border-radius:16px;
  background:var(--panel); border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.side-cta p{ font-size:13px; line-height:1.7; color:var(--text-2); margin-bottom:12px; }
.side-cta .btn{ width:100%; font-size:14px; min-height:42px; padding:0 14px; }
.side-foot{ margin-top:auto; padding:20px 14px 4px; font-size:12.5px; line-height:1.9; color:var(--text-3); }
.side-foot strong{ display:block; color:var(--text-2); font-weight:600; margin-bottom:4px; font-size:13px; }

.app-main{ position:relative; z-index:1; padding-top:60px; padding-bottom:84px; }
@media (min-width:1024px){ .app-main{ padding-top:0; padding-left:var(--sidebar-w); padding-bottom:88px; } }

.container-x{ width:100%; max-width:var(--container); margin:0 auto; padding:0 20px; }
@media (min-width:768px){ .container-x{ padding:0 32px; } }

.section{ padding:56px 0; position:relative; }
@media (min-width:768px){ .section{ padding:72px 0; } }
@media (min-width:1024px){ .section{ padding:100px 0; } }

.eyebrow{
  display:inline-flex; align-items:center; gap:10px;
  font-size:12px; font-weight:500; letter-spacing:.14em; color:var(--brand);
  margin-bottom:18px;
}
.eyebrow::before{ content:""; width:3px; height:14px; border-radius:2px; background:var(--brand); box-shadow:0 0 10px rgba(0,224,184,.7); }

.h2{ font-size:23px; font-weight:700; line-height:1.35; letter-spacing:-.005em; }
@media (min-width:768px){ .h2{ font-size:30px; } }
@media (min-width:1024px){ .h2{ font-size:34px; } }
.h3{ font-size:18px; font-weight:600; line-height:1.5; }
.lead{ color:var(--text-2); font-size:15.5px; line-height:1.9; }
.muted{ color:var(--text-3); font-size:13px; font-weight:500; }

.section-head{ margin-bottom:32px; }
.section-head .lead{ max-width:680px; margin-top:14px; }
@media (min-width:1024px){ .section-head{ margin-bottom:48px; } }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:46px; padding:0 22px; border-radius:12px;
  font-size:15px; font-weight:600; white-space:nowrap;
  transition:transform .18s ease-out, box-shadow .18s ease-out, background .18s ease-out, border-color .18s ease-out, color .18s ease-out, filter .18s ease-out;
}
.btn i{ font-size:13px; }
.btn-primary{
  background:linear-gradient(180deg, var(--brand), var(--brand-deep));
  color:#04140F;
  box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
}
.btn-primary:hover{
  transform:translateY(-1px); filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(0,224,184,.5), 0 16px 44px -12px rgba(0,224,184,.72);
}
.btn-primary:active{ transform:translateY(0); box-shadow:0 0 0 1px rgba(0,224,184,.3), 0 6px 18px -10px rgba(0,224,184,.4); }
.btn-ghost{
  background:transparent; border:1px solid var(--line); color:var(--text-1);
}
.btn-ghost:hover{ background:var(--panel-strong); border-color:rgba(0,224,184,.38); transform:translateY(-1px); }
.btn-ghost:active{ transform:translateY(0); background:var(--panel); }
.btn-sm{ min-height:40px; padding:0 16px; font-size:14px; }

.text-link{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14px; font-weight:600; color:var(--text-2);
  transition:color .18s ease-out;
}
.text-link i{ font-size:12px; transition:transform .18s ease-out; }
.text-link span{ border-bottom:2px solid transparent; transition:border-color .18s ease-out; }
.text-link:hover{ color:var(--brand); }
.text-link:hover span{ border-bottom-color:var(--accent); }
.text-link:hover i{ transform:translateX(3px); }

/* ---------- 玻璃卡 ---------- */
.glass{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:20px;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
}

/* ---------- 移动端顶栏与抽屉 ---------- */
.mobile-topbar{
  position:fixed; top:0; left:0; right:0; height:60px; z-index:70;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:0 16px;
  background:rgba(5,8,15,.9);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
@media (min-width:1024px){ .mobile-topbar{ display:none; } }
.mobile-topbar .brand{ padding:0; }
.mobile-topbar .brand-mark{ width:34px; height:34px; }
.mobile-topbar .brand-text{ font-size:14px; }
.topbar-actions{ display:flex; align-items:center; gap:10px; }
.icon-btn{
  width:44px; height:44px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  border:1px solid var(--line); color:var(--text-1); background:var(--panel);
  transition:background .18s ease-out, border-color .18s ease-out;
}
.icon-btn:hover{ background:var(--panel-strong); border-color:rgba(0,224,184,.35); }

.drawer-mask{
  position:fixed; inset:0; z-index:80;
  background:rgba(4,8,16,.72);
  backdrop-filter:blur(4px); -webkit-backdrop-filter:blur(4px);
  opacity:0; pointer-events:none; transition:opacity .2s ease-out;
}
.drawer-mask.is-open{ opacity:1; pointer-events:auto; }
.drawer{
  position:fixed; top:0; left:0; bottom:0; width:280px; z-index:90;
  background:#070C17; border-right:1px solid var(--line);
  padding:22px 18px;
  display:flex; flex-direction:column;
  transform:translateX(-100%); transition:transform .22s ease-out;
  overflow-y:auto;
}
.drawer.is-open{ transform:translateX(0); }
.drawer .brand{ padding:0 6px 20px; }
.drawer .side-foot{ margin-top:auto; }

/* ---------- Hero ---------- */
.hero{ padding-top:36px; padding-bottom:56px; position:relative; }
@media (min-width:768px){ .hero{ padding-top:52px; padding-bottom:72px; } }
@media (min-width:1024px){ .hero{ padding-top:76px; padding-bottom:104px; } }
.hero::after{
  content:""; position:absolute; top:-160px; right:-120px;
  width:620px; height:620px; border-radius:50%;
  background:radial-gradient(circle, rgba(0,224,184,.09), transparent 68%);
  pointer-events:none; z-index:-1;
}
.hero-grid{ display:grid; grid-template-columns:1fr; gap:44px; align-items:center; }
@media (min-width:1024px){
  .hero-grid{ grid-template-columns:repeat(12,minmax(0,1fr)); gap:32px; }
  .hero-copy{ grid-column:span 7; }
  .hero-visual{ grid-column:span 5; }
}
.hero h1{
  font-size:clamp(30px,3.7vw,50px);
  font-weight:800; line-height:1.18; letter-spacing:-.01em;
  margin-bottom:20px;
}
.hero h1 .hl{ color:var(--brand); }
.hero-sub{ color:var(--text-2); font-size:16px; line-height:1.9; max-width:590px; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:32px; }
.hero-metrics{
  display:flex; flex-wrap:wrap; gap:28px 40px; margin-top:44px;
  padding-top:28px; border-top:1px solid var(--line);
}
.metric-num{ font-size:26px; font-weight:800; color:var(--accent); line-height:1.2; letter-spacing:-.01em; }
.metric-label{ font-size:13px; color:var(--text-3); font-weight:500; margin-top:2px; }

.hero-visual{ position:relative; }
.hero-figure{
  position:relative; border-radius:20px; overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  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(5,8,15,.15) 0%, rgba(5,8,15,.72) 100%);
}
.hero-float{
  position:absolute; left:18px; right:18px; bottom:18px;
  padding:16px 18px; border-radius:16px;
  background:rgba(8,14,28,.72);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-float .t{ font-size:14px; font-weight:600; margin-bottom:6px; }
.hero-float .d{ font-size:13px; color:var(--text-2); line-height:1.7; }
.hero-float .tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.chip{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 11px; border-radius:999px;
  font-size:12px; font-weight:500; color:var(--text-2);
  border:1px solid var(--line); background:var(--panel);
}
.chip.brand{ color:var(--brand); border-color:rgba(0,224,184,.3); background:var(--brand-soft); }
.chip.amber{ color:var(--accent); border-color:rgba(255,154,60,.34); background:rgba(255,154,60,.1); }

/* ---------- 卖点三连 ---------- */
.point-grid{ display:grid; grid-template-columns:1fr; gap:24px; }
@media (min-width:768px){ .point-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }
.point-card{
  padding:28px 26px 24px;
  border-radius:20px;
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  display:flex; flex-direction:column;
  transition:transform .2s ease-out, border-color .2s ease-out, background .2s ease-out;
}
@media (min-width:768px){
  .point-card:nth-child(2){ margin-top:22px; }
  .point-card:nth-child(3){ margin-top:10px; }
}
.point-card:hover{ transform:translateY(-4px); border-color:rgba(0,224,184,.3); background:var(--panel-strong); }
.point-num{
  font-size:48px; font-weight:800; line-height:1; letter-spacing:-.02em;
  color:rgba(255,154,60,.34);
}
.point-card h3{ margin-top:16px; font-size:19px; font-weight:600; }
.point-card p{ margin-top:12px; color:var(--text-2); font-size:14.5px; line-height:1.85; flex:1; }
.point-card .text-link{ margin-top:20px; }

/* ---------- 场景演示 ---------- */
.scene{ display:grid; grid-template-columns:1fr; gap:28px; align-items:center; }
@media (min-width:1024px){
  .scene{ grid-template-columns:repeat(12,minmax(0,1fr)); gap:48px; }
  .scene-media{ grid-column:span 6; }
  .scene-copy{ grid-column:span 6; }
  .scene.reverse .scene-media{ order:2; }
  .scene.reverse .scene-copy{ order:1; }
}
.scene-media{
  border-radius:16px; overflow:hidden; position:relative;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
}
.scene-media img{ width:100%; height:100%; object-fit:cover; }
.scene-media::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(5,8,15,.05) 40%, rgba(5,8,15,.65) 100%);
}
.scene-badge{
  position:absolute; top:16px; left:16px; z-index:2;
  padding:5px 12px; border-radius:999px; font-size:12px; font-weight:600;
  color:var(--accent); background:rgba(8,14,28,.75);
  border:1px solid rgba(255,154,60,.34);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
}
.scene-copy h3{ font-size:22px; font-weight:700; line-height:1.45; margin-bottom:16px; }
@media (min-width:1024px){ .scene-copy h3{ font-size:26px; } }
.scene-copy p{ color:var(--text-2); font-size:15px; line-height:1.9; }
.scene-copy p + p{ margin-top:12px; }
.dot-list{ margin-top:20px; display:flex; flex-direction:column; gap:10px; }
.dot-list li{ display:flex; align-items:flex-start; gap:10px; font-size:14.5px; color:var(--text-1); }
.dot-list li::before{
  content:""; flex:0 0 auto; width:7px; height:7px; margin-top:9px;
  background:var(--brand); border-radius:1px;
  box-shadow:0 0 10px rgba(0,224,184,.65);
}
.scene-divider{ height:1px; border-top:1px dashed var(--line); margin:48px 0; }
@media (min-width:1024px){ .scene-divider{ margin:72px 0; } }

/* ---------- 分类卡组 ---------- */
.cat-grid{ display:grid; grid-template-columns:1fr; gap:20px; }
@media (min-width:640px){ .cat-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1280px){ .cat-grid{ grid-template-columns:repeat(4,minmax(0,1fr)); } }
.cat-card{
  display:flex; flex-direction:column; min-height:210px;
  padding:24px 22px;
  border-radius:16px;
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .2s ease-out, border-color .2s ease-out, background .2s ease-out;
}
.cat-card:hover{ transform:translateY(-4px); border-color:rgba(0,224,184,.32); background:var(--panel-strong); }
.cat-icon{
  width:46px; height:46px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  background:var(--brand-soft); border:1px solid rgba(0,224,184,.26);
  color:var(--brand); font-size:18px;
  transition:box-shadow .2s ease-out;
}
.cat-card:hover .cat-icon{ box-shadow:0 0 22px -4px rgba(0,224,184,.6); }
.cat-card h3{ margin-top:18px; font-size:17.5px; font-weight:600; }
.cat-card p{ margin-top:10px; color:var(--text-2); font-size:14px; line-height:1.8; flex:1; }
.cat-more{
  margin-top:18px; display:flex; align-items:center; justify-content:space-between;
  font-size:13px; color:var(--text-3); font-weight:500;
}
.cat-more i{ color:var(--brand); transition:transform .2s ease-out; }
.cat-card:hover .cat-more i{ transform:translateX(4px); }

/* ---------- 内容列表 ---------- */
.post-grid{ display:grid; grid-template-columns:1fr; gap:22px; }
@media (min-width:640px){ .post-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .post-grid{ grid-template-columns:repeat(3,minmax(0,1fr)); } }
.post-card{
  display:flex; flex-direction:column; overflow:hidden;
  border-radius:16px; border:1px solid var(--line);
  background:rgba(255,255,255,.025);
  transition:transform .2s ease-out, border-color .2s ease-out, background .2s ease-out;
}
.post-card:hover{ transform:translateY(-4px); border-color:rgba(0,224,184,.3); background:var(--panel-strong); }
.post-cover{ position:relative; aspect-ratio:16/10; overflow:hidden; }
.post-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .3s ease-out; }
.post-card:hover .post-cover img{ transform:scale(1.04); }
.post-cover::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(5,8,15,0) 45%, rgba(5,8,15,.72) 100%);
}
.post-badge{
  position:absolute; left:14px; top:14px; z-index:2;
  padding:4px 11px; border-radius:999px; font-size:12px; font-weight:600;
  color:var(--accent); background:rgba(8,14,28,.78);
  border:1px solid rgba(255,154,60,.34);
  backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px);
}
.post-body{ padding:18px 18px 16px; display:flex; flex-direction:column; flex:1; }
.post-body h3{
  font-size:17px; font-weight:600; line-height:1.5;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
}
.post-excerpt{
  margin-top:10px; color:var(--text-2); font-size:14px; line-height:1.8;
  display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden;
  flex:1;
}
.post-meta{
  margin-top:16px; padding-top:14px; border-top:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between;
  font-size:12.5px; color:var(--text-3); font-weight:500;
}
.post-meta i{ color:var(--brand); transition:transform .2s ease-out; }
.post-card:hover .post-meta i{ transform:translateX(4px); }
.empty-box{
  border:1px dashed var(--line); border-radius:16px;
  padding:48px 24px; text-align:center;
}
.empty-box p{ color:var(--text-2); font-size:15px; margin-bottom:18px; }

/* ---------- 数据条与文字墙 ---------- */
.stats{
  display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px 16px;
}
@media (min-width:768px){ .stats{ grid-template-columns:repeat(4,minmax(0,1fr)); gap:0; } }
.stat{ padding:0 0 0 0; }
@media (min-width:768px){
  .stat{ padding:0 26px; border-left:1px solid var(--line); }
  .stat:first-child{ border-left:0; padding-left:0; }
}
.stat-num{ font-size:30px; font-weight:800; color:var(--brand); line-height:1.2; letter-spacing:-.01em; }
.stat-label{ font-size:13px; color:var(--text-3); font-weight:500; margin-top:4px; }
.wall{ display:flex; flex-wrap:wrap; gap:10px; margin-top:40px; }
.wall span{
  padding:7px 14px; border-radius:999px; font-size:13px; font-weight:500;
  color:var(--text-2); border:1px solid var(--line); background:var(--panel);
  transition:color .18s ease-out, border-color .18s ease-out;
}
.wall span:hover{ color:var(--brand); border-color:rgba(0,224,184,.32); }

/* ---------- FAQ ---------- */
.faq-grid{ display:grid; grid-template-columns:1fr; gap:32px; }
@media (min-width:1024px){ .faq-grid{ grid-template-columns:repeat(12,minmax(0,1fr)); gap:48px; } .faq-aside{ grid-column:span 4; } .faq-list{ grid-column:span 8; } }
.faq-list{ display:flex; flex-direction:column; gap:12px; }
.faq-item{
  border-radius:16px; border:1px solid var(--line);
  background:var(--panel);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  transition:border-color .2s ease-out, background .2s ease-out;
}
.faq-item:hover{ border-color:rgba(0,224,184,.24); }
.faq-item.is-open{ border-color:rgba(0,224,184,.34); background:var(--panel-strong); }
.faq-q{
  width:100%; display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:18px 20px; text-align:left; font-size:15.5px; font-weight:600; color:var(--text-1);
  min-height:44px;
  transition:color .2s ease-out;
}
.faq-item.is-open .faq-q{ color:var(--brand); }
.faq-q i{ flex:0 0 auto; font-size:13px; color:var(--text-3); transition:transform .24s ease-out, color .2s ease-out; }
.faq-item.is-open .faq-q i{ transform:rotate(180deg); color:var(--brand); }
.faq-a{ display:grid; grid-template-rows:0fr; transition:grid-template-rows .24s ease-out; }
.faq-item.is-open .faq-a{ grid-template-rows:1fr; }
.faq-a > div{ overflow:hidden; }
.faq-a p{ padding:0 20px 20px; color:var(--text-2); font-size:14.5px; line-height:1.85; }

/* ---------- 全宽 CTA ---------- */
.cta-band{
  border-radius:20px; padding:40px 26px;
  background:linear-gradient(135deg, rgba(0,224,184,.10), rgba(255,154,60,.05) 62%, rgba(255,255,255,.02));
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  display:flex; flex-direction:column; gap:24px; align-items:flex-start;
}
@media (min-width:1024px){
  .cta-band{ flex-direction:row; align-items:center; justify-content:space-between; padding:52px 56px; gap:40px; }
}
.cta-band h2{ font-size:23px; font-weight:700; line-height:1.4; }
@media (min-width:768px){ .cta-band h2{ font-size:28px; } }
.cta-band p{ margin-top:12px; color:var(--text-2); font-size:15px; line-height:1.85; max-width:620px; }
.cta-actions{ display:flex; flex-wrap:wrap; gap:14px; flex:0 0 auto; }

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  padding:56px 0 32px;
  background:linear-gradient(180deg, rgba(8,14,28,0), rgba(8,14,28,.6));
}
.footer-grid{ display:grid; grid-template-columns:1fr; gap:36px; }
@media (min-width:640px){ .footer-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (min-width:1024px){ .footer-grid{ grid-template-columns:1.5fr 1fr 1fr 1.2fr; gap:40px; } }
.footer-title{ font-size:13px; font-weight:600; color:var(--text-3); margin-bottom:16px; letter-spacing:.06em; }
.footer-links{ display:flex; flex-direction:column; gap:10px; }
.footer-links a{ font-size:14px; color:var(--text-2); transition:color .18s ease-out; width:fit-content; }
.footer-links a:hover{ color:var(--brand); }
.footer-desc{ color:var(--text-2); font-size:14px; line-height:1.9; margin-top:14px; max-width:340px; }
.footer-contact{ color:var(--text-2); font-size:14px; line-height:2; }
.footer-contact strong{ color:var(--text-1); font-weight:600; }
.footer-bottom{
  margin-top:44px; padding-top:22px; border-top:1px solid var(--line);
  display:flex; flex-direction:column; gap:10px;
  font-size:12.5px; color:var(--text-3); line-height:1.9;
}
@media (min-width:768px){ .footer-bottom{ flex-direction:row; align-items:center; justify-content:space-between; } }

/* ---------- 底部转化条 ---------- */
.bottom-bar{
  position:fixed; left:0; right:0; bottom:0; z-index:75;
  min-height:56px;
  padding:8px 16px calc(8px + env(safe-area-inset-bottom));
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  background:rgba(7,12,23,.86);
  border-top:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  opacity:0; transform:translateY(100%); pointer-events:none;
  transition:opacity .26s ease-out, transform .26s ease-out;
}
.bottom-bar.is-visible{ opacity:1; transform:translateY(0); pointer-events:auto; }
.bottom-bar .bb-text{ font-size:13.5px; color:var(--text-2); line-height:1.5; }
.bottom-bar .bb-text strong{ color:var(--text-1); font-weight:600; }
.bottom-bar .btn{ flex:0 0 auto; }
@media (min-width:1024px){
  .bottom-bar{ left:var(--sidebar-w); min-height:64px; padding:10px 32px; }
  .bottom-bar .bb-text{ font-size:14px; }
}
@media (max-width:520px){
  .bottom-bar .btn{ flex:1 1 auto; }
  .bottom-bar .bb-text{ display:none; }
}

/* roulang page: article */
:root{
  --bg-900:#05080F;
  --bg-800:#080E1C;
  --panel:rgba(255,255,255,0.04);
  --panel-strong:rgba(255,255,255,0.07);
  --line:rgba(255,255,255,0.08);
  --brand:#00E0B8;
  --brand-deep:#00B894;
  --brand-soft:rgba(0,224,184,0.14);
  --accent:#FF9A3C;
  --text-1:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C96;
  --radius-lg:20px;
  --radius-md:16px;
  --radius-sm:12px;
  --shadow-card:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  --side-w:240px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:auto 0 -20% 0;
  height:70vh;
  background:radial-gradient(60% 60% at 50% 100%, rgba(0,224,184,.08), transparent 70%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:72px 72px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em}
p{margin:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container-x{padding:0 32px}}

/* ---------- 侧边导航 ---------- */
.side-bar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--side-w);
  padding:26px 18px 20px;
  display:flex;
  flex-direction:column;
  gap:18px;
  background:rgba(8,14,28,.88);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
  transition:transform .24s ease-out;
}
.brand{display:flex;align-items:center;gap:10px;padding:0 6px 4px}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(135deg, rgba(0,224,184,.22), rgba(0,224,184,0));
  border:1px solid rgba(0,224,184,.35);
  color:var(--brand);
  font-size:15px;
  box-shadow:0 0 0 1px rgba(0,224,184,.12), 0 12px 28px -14px rgba(0,224,184,.6);
}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.01em;color:var(--text-1);line-height:1.35}
.side-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:11px 12px;
  border-radius:12px;
  color:var(--text-2);
  font-size:14.5px;
  transition:background .18s ease-out,color .18s ease-out,transform .18s ease-out;
  min-height:44px;
}
.side-link i{width:18px;font-size:14px;color:var(--text-3);transition:color .18s ease-out}
.side-link:hover{background:var(--panel);color:var(--text-1)}
.side-link:hover i{color:var(--brand)}
.side-link.is-active{background:var(--panel-strong);color:var(--text-1);box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.side-link.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;background:var(--brand);
}
.side-link.is-active i{color:var(--brand)}
.side-divider{height:1px;background:var(--line);margin:6px 2px}

.side-cta{
  margin-top:auto;
  padding:16px;
  border-radius:var(--radius-md);
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.side-cta p{font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:12px}
.side-meta{font-size:12.5px;color:var(--text-3);line-height:1.75;padding:0 6px}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  border-radius:var(--radius-sm);
  border:none;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
  color:#04140F;
  font-size:14.5px;font-weight:700;
  cursor:pointer;
  box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
  transition:transform .18s ease-out, box-shadow .18s ease-out, filter .18s ease-out;
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(0,224,184,.5), 0 16px 40px -12px rgba(0,224,184,.7)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(0,224,184,.32), 0 8px 20px -12px rgba(0,224,184,.5)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:transparent;
  color:var(--text-1);
  font-size:14.5px;font-weight:600;
  cursor:pointer;
  transition:background .18s ease-out, border-color .18s ease-out, transform .18s ease-out;
}
.btn-ghost:hover{background:var(--panel-strong);border-color:rgba(0,224,184,.35);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:8px 14px;font-size:13.5px}
.btn-block{width:100%}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);
  font-size:14px;font-weight:600;
  transition:color .18s ease-out;
}
.text-link i{transition:transform .18s ease-out}
.text-link:hover{color:var(--brand-deep)}
.text-link:hover i{transform:translateX(3px)}

/* ---------- 主区域 ---------- */
.main-area{position:relative;z-index:1;margin-left:var(--side-w);min-height:100vh;display:flex;flex-direction:column}

/* 移动端顶栏 */
.mobile-topbar{
  display:none;
  position:sticky;top:0;z-index:70;
  height:60px;
  align-items:center;justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:rgba(8,14,28,.9);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.burger{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text-1);
  font-size:16px;
  cursor:pointer;
}
.burger:hover{border-color:rgba(0,224,184,.35);color:var(--brand)}
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(4,8,16,.72);
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;
  transition:opacity .22s ease-out, visibility .22s ease-out;
  z-index:55;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  padding:28px 0 20px;
}
.crumb a{color:var(--text-2);transition:color .18s ease-out}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:var(--text-3);opacity:.7}
.crumb .current{color:var(--text-1);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头 ---------- */
.article-head{
  position:relative;
  padding:30px 30px 28px;
  border-radius:var(--radius-lg);
  background:linear-gradient(180deg, rgba(8,14,28,.94), rgba(5,8,15,.9));
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.article-head::after{
  content:"";
  position:absolute;right:-10%;top:-40%;
  width:46%;height:180%;
  background:radial-gradient(circle at 60% 40%, rgba(0,224,184,.16), transparent 62%);
  pointer-events:none;
}
.article-head h1{
  position:relative;z-index:1;
  font-size:clamp(24px,2.8vw,36px);
  font-weight:800;
  line-height:1.32;
  letter-spacing:-0.01em;
  margin:14px 0 0;
}
.article-meta{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:20px;
  font-size:13px;color:var(--text-3);font-weight:500;
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);opacity:.7}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12px;font-weight:600;
  letter-spacing:.04em;
  color:var(--accent);
  border:1px solid rgba(255,154,60,.4);
  background:rgba(255,154,60,.08);
}
.badge-brand{
  color:var(--brand);
  border-color:rgba(0,224,184,.4);
  background:var(--brand-soft);
}

/* ---------- 阅读版式 ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:36px;
  padding:36px 0 0;
}
@media(min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,760px) 280px;justify-content:center;gap:48px}
}
.article-panel{
  padding:28px 24px 34px;
  border-radius:var(--radius-lg);
  background:var(--bg-800);
  border:1px solid var(--line);
  box-shadow:0 24px 60px -32px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.05);
}
@media(min-width:768px){.article-panel{padding:40px 44px 48px}}

.article-body{font-size:16px;line-height:1.9;color:var(--text-1)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em;color:#DDE7F6}
.article-body > p:first-of-type{font-size:17px;color:#F2F7FF;line-height:1.92}
.article-body h2{
  position:relative;
  font-size:26px;font-weight:700;line-height:1.38;
  margin:1.6em 0 .6em;
  padding-left:14px;
  color:#FFFFFF;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.5;margin:1.5em 0 .5em;color:#F4F8FF}
.article-body h4{font-size:16.5px;font-weight:600;margin:1.3em 0 .4em;color:var(--text-1)}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(0,224,184,.35);transition:color .18s ease-out,border-color .18s ease-out}
.article-body a:hover{color:var(--brand-deep);border-bottom-color:var(--accent)}
.article-body strong{color:#FFFFFF;font-weight:700}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0}
.article-body ul li{list-style:none;position:relative;padding-left:20px;margin-bottom:.55em;color:#DDE7F6}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--brand);
}
.article-body ol{counter-reset:olc;padding-left:0}
.article-body ol li{list-style:none;position:relative;padding-left:30px;margin-bottom:.6em;color:#DDE7F6;counter-increment:olc}
.article-body ol li::before{
  content:counter(olc,decimal-leading-zero);
  position:absolute;left:0;top:.28em;
  font-size:12.5px;font-weight:700;color:var(--accent);letter-spacing:.04em;
}
.article-body blockquote{
  margin:1.4em 0;padding:16px 22px;
  border-left:3px solid var(--brand);
  background:var(--brand-soft);
  border-radius:0 14px 14px 0;
  color:#E7F1FF;
}
.article-body blockquote p{margin:0;color:#E7F1FF}
.article-body img{border-radius:var(--radius-md);margin:1.5em auto;box-shadow:0 24px 60px -30px rgba(0,0,0,.9)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px}
.article-body thead th{
  text-align:left;padding:12px 14px;font-size:12.5px;font-weight:600;letter-spacing:.06em;
  color:var(--text-2);border-bottom:1px solid var(--line);
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--line);color:#DDE7F6}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.026)}
.article-body pre{
  background:#03060C;border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;overflow:auto;margin:1.5em 0;font-size:14px;line-height:1.7;
}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:rgba(255,255,255,.06);padding:2px 6px;border-radius:6px;color:#9DF3E2;
}
.article-body pre code{background:none;padding:0;color:#C9E7FF}
.article-body hr{border:none;border-top:1px dashed var(--line);margin:2em 0}

/* ---------- 侧栏模块 ---------- */
.side-card{
  padding:20px;
  border-radius:var(--radius-md);
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  margin-bottom:20px;
}
.side-card:last-child{margin-bottom:0}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:14px;
}
.side-title::before{content:"";width:2px;height:12px;background:var(--brand);border-radius:2px}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow-y:auto}
.toc-list a{
  display:block;
  font-size:13.5px;line-height:1.6;
  color:var(--text-2);
  padding:7px 10px;
  border-radius:9px;
  border-left:2px solid transparent;
  transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.toc-list a.lvl-3{padding-left:22px;font-size:13px;color:var(--text-3)}
.toc-list a:hover{background:var(--panel-strong);color:var(--text-1)}
.toc-list a.is-current{color:var(--brand);border-left-color:var(--brand);background:var(--brand-soft)}
.side-empty{font-size:13px;color:var(--text-3);line-height:1.7}

/* ---------- 底部导览 ---------- */
.nav-duo{
  display:grid;grid-template-columns:1fr;gap:16px;margin-top:44px;
}
@media(min-width:768px){.nav-duo{grid-template-columns:1fr 1fr}}
.nav-card{
  display:block;
  padding:20px 22px;
  border-radius:var(--radius-md);
  background:var(--panel);
  border:1px solid var(--line);
  transition:transform .18s ease-out,border-color .18s ease-out,background .18s ease-out;
}
.nav-card:hover{transform:translateY(-2px);border-color:rgba(0,224,184,.35);background:var(--panel-strong)}
.nav-card .k{font-size:12px;letter-spacing:.14em;color:var(--text-3);font-weight:600}
.nav-card .v{margin-top:8px;font-size:16px;font-weight:600;color:var(--text-1);display:flex;align-items:center;gap:8px}
.nav-card:hover .v i{transform:translateX(3px)}
.nav-card .v i{transition:transform .18s ease-out;color:var(--brand);font-size:14px}
.nav-card.next{text-align:right}
.nav-card.next .v{justify-content:flex-end}

.related-grid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:22px}
@media(min-width:640px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.related-card{
  display:flex;flex-direction:column;
  border-radius:var(--radius-md);
  background:var(--panel);
  border:1px solid var(--line);
  overflow:hidden;
  transition:transform .18s ease-out,border-color .18s ease-out;
}
.related-card:hover{transform:translateY(-3px);border-color:rgba(0,224,184,.35)}
.related-thumb{aspect-ratio:16/10;overflow:hidden;position:relative}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(to top, rgba(5,8,15,.78), rgba(5,8,15,0) 62%);
}
.related-body{padding:16px 18px 18px}
.related-body h3{font-size:16px;font-weight:600;line-height:1.5;color:var(--text-1)}
.related-body p{font-size:13.5px;color:var(--text-2);line-height:1.75;margin-top:8px}
.section-head{margin-top:56px}
.section-head .title{
  font-size:22px;font-weight:700;color:var(--text-1);
  display:flex;align-items:center;gap:10px;
}
.section-head .title::before{content:"";width:3px;height:18px;border-radius:3px;background:linear-gradient(180deg,var(--brand),var(--brand-deep))}
.section-head .sub{font-size:13.5px;color:var(--text-3);margin-top:8px}

.back-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:48px}

.empty-state{
  text-align:center;
  padding:60px 24px;
  border:1px dashed var(--line);
  border-radius:var(--radius-md);
  background:var(--panel);
}
.empty-state .big{font-size:18px;font-weight:600;color:var(--text-1)}
.empty-state .sub{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.8}
.empty-state .btn-primary{margin-top:22px}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;
  left:0;right:0;bottom:0;
  min-height:56px;
  display:flex;align-items:center;gap:16px;
  padding:8px 16px;
  padding-bottom:calc(8px + env(safe-area-inset-bottom));
  background:rgba(8,14,28,.9);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-top:1px solid var(--line);
  transform:translateY(110%);
  opacity:0;
  transition:transform .24s ease-out, opacity .24s ease-out;
  z-index:80;
}
.sticky-bar.is-visible{transform:translateY(0);opacity:1}
.sticky-bar .txt{font-size:13.5px;color:var(--text-2);flex:1;min-width:0;line-height:1.6}
.sticky-bar .txt strong{color:var(--text-1);font-weight:600}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:auto;
  padding:64px 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(8,14,28,.6), rgba(5,8,15,.95));
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-desc{font-size:13.5px;color:var(--text-2);line-height:1.85;margin-top:16px;max-width:44ch}
.footer-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--text-3);margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .18s ease-out}
.footer-links a:hover{color:var(--brand)}
.footer-contact{font-size:13.5px;color:var(--text-2);line-height:2}
.footer-contact strong{color:var(--text-1);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media(min-width:1280px){
  :root{--side-w:264px}
}
@media(max-width:1023px){
  .side-bar{width:280px;transform:translateX(-100%);padding-top:22px}
  .side-bar.is-open{transform:translateX(0)}
  .main-area{margin-left:0}
  .mobile-topbar{display:flex}
  .sticky-bar{left:0}
}
@media(min-width:1024px){
  .sticky-bar{left:var(--side-w);min-height:64px;padding-left:32px;padding-right:32px}
  .mobile-topbar{display:none}
  .drawer-mask{display:none}
}
@media(max-width:519px){
  .article-panel{padding:22px 18px 28px}
  .article-head{padding:24px 20px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .sticky-bar .txt{display:none}
  .sticky-bar .btn-primary{width:100%}
  .crumb{padding-top:20px}
}

/* roulang page: category1 */
:root{
  --bg-900:#05080F;
  --bg-800:#080E1C;
  --panel:rgba(255,255,255,.04);
  --panel-strong:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.08);
  --brand:#00E0B8;
  --brand-deep:#00B894;
  --brand-soft:rgba(0,224,184,.14);
  --accent:#FF9A3C;
  --text-1:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C96;
  --r-lg:20px;
  --r-md:16px;
  --r-btn:12px;
  --nav-w:240px;
  --shadow-card:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  left:0;right:0;bottom:-30vh;
  height:70vh;
  background:radial-gradient(60% 60% at 50% 100%, rgba(0,224,184,.07), transparent 70%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease-out, border-color .18s ease-out, background-color .18s ease-out;}
a:hover{color:var(--brand);}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}
p{margin:0 0 1.15em;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

.container-x{max-width:1280px;margin:0 auto;padding:0 20px;position:relative;z-index:1;}
@media (min-width:768px){.container-x{padding:0 32px;}}

/* ---------- App shell ---------- */
.app-shell{min-height:100vh;position:relative;z-index:1;}
.side-shell{display:none;}
.topbar{
  position:fixed;top:0;left:0;right:0;height:60px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(6,10,20,.88);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
  z-index:50;
}
.topbar-actions{display:flex;align-items:center;gap:10px;}
.burger{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);color:var(--text-1);
  transition:background-color .18s ease-out,border-color .18s ease-out;
}
.burger:hover{background:var(--panel-strong);border-color:var(--brand-soft);}
.main-area{padding-top:60px;padding-bottom:96px;}
@media (min-width:1024px){
  :root{--nav-w:240px;}
  .side-shell{
    display:flex;flex-direction:column;
    position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
    padding:22px 16px 18px;
    background:linear-gradient(180deg, rgba(8,14,28,.96), rgba(5,8,15,.98));
    border-right:1px solid var(--line);
    z-index:50;
    overflow-y:auto;
  }
  .topbar{display:none;}
  .main-area{padding-top:0;padding-left:var(--nav-w);}
}
@media (min-width:1280px){
  :root{--nav-w:264px;}
}

.brand{display:flex;align-items:center;gap:10px;padding:0 4px 22px;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(145deg, rgba(0,224,184,.22), rgba(0,224,184,.06));
  border:1px solid rgba(0,224,184,.35);
  color:var(--brand);font-size:16px;
  box-shadow:0 0 22px -8px rgba(0,224,184,.55);
}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.01em;line-height:1.3;}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:11px;
  min-height:44px;padding:10px 12px 10px 14px;
  border-radius:var(--r-btn);
  color:var(--text-2);font-size:14.5px;
  transition:background-color .18s ease-out,color .18s ease-out;
}
.side-link i{width:18px;text-align:center;font-size:14px;color:var(--text-3);transition:color .18s ease-out;}
.side-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);
  width:3px;height:22px;border-radius:999px;background:var(--brand);
  transition:transform .18s ease-out;
}
.side-link:hover{background:var(--panel);color:var(--text-1);}
.side-link:hover i{color:var(--brand);}
.side-link.is-active{background:var(--panel-strong);color:var(--text-1);font-weight:600;}
.side-link.is-active i{color:var(--brand);}
.side-link.is-active::before{transform:translateY(-50%) scaleY(1);}
.side-divider{height:1px;background:var(--line);margin:18px 4px;}
.side-cta{
  margin:0 2px;
  padding:16px 14px;
  border-radius:var(--r-md);
  background:var(--panel);
  border:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.side-cta p{margin:0 0 12px;font-size:13px;line-height:1.7;color:var(--text-2);}
.side-foot{margin:auto;padding:18px 4px 0;font-size:12.5px;line-height:1.8;color:var(--text-3);}
.side-foot strong{color:var(--text-2);font-weight:600;display:block;margin-bottom:2px;}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,8,16,.72);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;transition:opacity .2s ease-out;z-index:60;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;
  padding:20px 16px;
  background:#070C18;border-right:1px solid var(--line);
  transform:translateX(-100%);
  transition:transform .22s ease-out;
  z-index:70;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
body.no-scroll{overflow:hidden;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 20px;
  border-radius:var(--r-btn);
  font-size:14.5px;font-weight:600;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04140F;
  box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
}
.btn-primary:hover{
  color:#04140F;transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(0,224,184,.5), 0 18px 40px -12px rgba(0,224,184,.72);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 8px 22px -14px rgba(0,224,184,.5);}
.btn-ghost{
  background:transparent;border:1px solid var(--line);color:var(--text-1);
}
.btn-ghost:hover{background:var(--panel-strong);border-color:var(--brand-soft);color:var(--text-1);transform:translateY(-1px);}
.btn-sm{min-height:38px;padding:8px 15px;font-size:13.5px;}

/* ---------- Breadcrumb / page head ---------- */
.crumbs{font-size:13px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:26px 0 0;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--text-3);opacity:.6;}
.crumbs .current{color:var(--text-1);}

.page-head{padding:26px 0 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--text-3);
}
.eyebrow::before{content:"";width:2px;height:12px;border-radius:2px;background:var(--brand);display:inline-block;}
.page-head h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.18;font-weight:800;
  margin:14px 0 16px;max-width:22em;
}
.page-head h1 em{font-style:normal;color:var(--brand);}
.page-sub{max-width:46em;color:var(--text-2);font-size:16px;margin-bottom:22px;}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.head-media{
  margin-top:34px;border-radius:var(--r-md);overflow:hidden;position:relative;
  border:1px solid var(--line);aspect-ratio:16/7;
}
.head-media img{width:100%;height:100%;object-fit:cover;opacity:.62;}
.head-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(5,8,15,.15), rgba(5,8,15,.92));
}
.head-media-tag{
  position:absolute;left:18px;bottom:16px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(255,154,60,.12);
  border:1px solid rgba(255,154,60,.42);
  color:var(--accent);font-size:12.5px;font-weight:600;
}

/* ---------- Section basics ---------- */
.section{padding:64px 0 0;}
@media (min-width:768px){.section{padding:88px 0 0;}}
@media (min-width:1024px){.section{padding:104px 0 0;}}
.section-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between;margin-bottom:32px;}
.section-head h2{font-size:clamp(23px,3vw,34px);line-height:1.3;}
.section-note{color:var(--text-3);font-size:13px;}
.lead{color:var(--text-2);max-width:52em;}

/* ---------- Two column layout ---------- */
.layout-2{
  display:grid;grid-template-columns:1fr;gap:28px;
}
@media (min-width:1024px){
  .layout-2{grid-template-columns:300px minmax(0,1fr);gap:40px;align-items:start;}
}
.aside-stick{position:sticky;top:28px;display:flex;flex-direction:column;gap:16px;}
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}
.panel-title{font-size:13px;color:var(--text-3);letter-spacing:.08em;margin-bottom:14px;}
.index-list{display:flex;flex-direction:column;gap:2px;}
.index-list a{
  display:flex;gap:10px;align-items:flex-start;
  padding:9px 10px;border-radius:10px;
  font-size:14px;color:var(--text-2);
  transition:background-color .18s ease-out,color .18s ease-out;
}
.index-list a:hover{background:var(--panel-strong);color:var(--brand);}
.index-list span{color:var(--accent);font-size:12px;font-weight:600;min-width:22px;padding-top:2px;}
.aside-card{overflow:hidden;border-radius:var(--r-md);border:1px solid var(--line);position:relative;}
.aside-card img{width:100%;aspect-ratio:16/10;object-fit:cover;opacity:.75;}
.aside-card figcaption{padding:14px 16px;font-size:13px;color:var(--text-2);background:var(--bg-800);}
.aside-tip{font-size:13.5px;color:var(--text-2);line-height:1.8;margin:0;}
.aside-tip strong{color:var(--text-1);}

/* ---------- Flow ---------- */
.flow{position:relative;margin-top:6px;}
.flow-step{position:relative;display:grid;grid-template-columns:52px minmax(0,1fr);gap:16px;padding-bottom:26px;}
.flow-step:last-child{padding-bottom:0;}
.flow-step::before{
  content:"";position:absolute;left:25px;top:56px;bottom:0;width:1px;
  background:linear-gradient(180deg,var(--line),rgba(255,255,255,.03));
}
.flow-step:last-child::before{display:none;}
.flow-num{
  width:52px;height:52px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:var(--panel-strong);border:1px solid var(--line);
  color:var(--accent);font-size:16px;font-weight:700;letter-spacing:.02em;
}
.flow-body{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px 22px 20px;
  transition:border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
}
.flow-body:hover{border-color:var(--brand-soft);transform:translateY(-1px);box-shadow:var(--shadow-card);}
.flow-body h3{font-size:19px;line-height:1.45;margin-bottom:10px;}
.flow-body p{color:var(--text-2);font-size:15px;margin-bottom:12px;}
.point-list{display:flex;flex-direction:column;gap:8px;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);}
.point-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-2);line-height:1.75;}
.point-list li::before{
  content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:2px;
  background:var(--brand);opacity:.85;
}
.flow-tag{
  display:inline-block;font-size:12px;font-weight:600;color:var(--accent);
  border:1px solid rgba(255,154,60,.35);border-radius:999px;padding:2px 10px;margin-bottom:10px;
}

/* ---------- Stat strip ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;
  margin-top:8px;padding:24px 20px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--bg-800);
}
@media (min-width:768px){.stat-strip{grid-template-columns:repeat(4,minmax(0,1fr));padding:28px 32px;}}
.stat-item{border-left:1px solid var(--line);padding-left:16px;}
.stat-item:first-child{border-left:none;padding-left:0;}
.stat-num{font-size:26px;font-weight:800;color:var(--brand);line-height:1.2;}
.stat-label{font-size:12.5px;color:var(--text-3);margin-top:4px;}

/* ---------- Text-image block ---------- */
.split{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;}
@media (min-width:900px){.split{grid-template-columns:6fr 6fr;gap:40px;}}
.split-media{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);position:relative;}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,8,15,.75));}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:1fr;gap:26px;}
@media (min-width:1024px){.faq-wrap{grid-template-columns:4fr 8fr;gap:48px;align-items:start;}}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:border-color .18s ease-out,background-color .18s ease-out;
}
.faq-item.is-open{border-color:var(--brand-soft);background:var(--panel-strong);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;padding:18px 20px;font-size:16px;font-weight:600;line-height:1.6;
  transition:color .18s ease-out;
}
.faq-q:hover{color:var(--brand);}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-q i{color:var(--text-3);font-size:13px;transition:transform .24s ease-out;flex:0 0 auto;}
.faq-item.is-open .faq-q i{transform:rotate(180deg);color:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease-out;}
.faq-a p{margin:0;padding:0 20px 20px;color:var(--text-2);font-size:14.5px;line-height:1.85;}

/* ---------- Related categories ---------- */
.rel-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media (min-width:768px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.rel-card{
  display:flex;flex-direction:column;gap:10px;
  padding:22px;border-radius:var(--r-md);
  background:var(--panel);border:1px solid var(--line);
  transition:transform .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.rel-card:hover{transform:translateY(-2px);border-color:var(--brand-soft);background:var(--panel-strong);color:inherit;}
.rel-card i{color:var(--brand);font-size:20px;}
.rel-card h3{font-size:17px;}
.rel-card p{margin:0;font-size:13.5px;color:var(--text-2);line-height:1.75;}
.rel-more{margin-top:auto;font-size:13px;color:var(--text-3);display:inline-flex;align-items:center;gap:6px;}
.rel-card:hover .rel-more{color:var(--accent);}

/* ---------- CTA band ---------- */
.cta-band{
  margin-top:72px;
  padding:34px 26px;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(0,224,184,.10),rgba(255,154,60,.06) 70%,transparent);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
}
@media (min-width:768px){.cta-band{padding:40px 44px;}}
.cta-band h2{font-size:clamp(21px,2.6vw,28px);margin-bottom:8px;}
.cta-band p{margin:0;color:var(--text-2);font-size:14.5px;max-width:44em;}

/* ---------- Footer ---------- */
.site-footer{margin-top:88px;border-top:1px solid var(--line);background:var(--bg-800);padding:52px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-desc{font-size:13.5px;color:var(--text-2);line-height:1.85;max-width:34em;margin:14px 0 0;}
.footer-title{font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-bottom:14px;}
.footer-links{display:flex;flex-direction:column;gap:9px;}
.footer-links a{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--brand);}
.footer-contact{font-size:13.5px;color:var(--text-2);line-height:1.9;}
.footer-contact strong{color:var(--text-1);font-weight:600;}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:var(--text-3);
}

/* ---------- Sticky CTA ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:55;
  display:flex;align-items:center;gap:14px;
  padding:8px 16px calc(8px + env(safe-area-inset-bottom));
  min-height:56px;
  background:rgba(7,12,24,.9);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-top:1px solid var(--line);
  transform:translateY(110%);opacity:0;pointer-events:none;
  transition:transform .24s ease-out,opacity .24s ease-out;
}
.sticky-cta.is-visible{transform:translateY(0);opacity:1;pointer-events:auto;}
.sticky-cta p{margin:0;font-size:13.5px;color:var(--text-2);flex:1 1 auto;min-width:0;}
.sticky-cta .btn{flex:0 0 auto;}
@media (min-width:1024px){
  .sticky-cta{left:var(--nav-w);padding:10px 32px;min-height:64px;}
  .sticky-cta .btn{flex:0 0 auto;}
}
@media (max-width:519px){
  .sticky-cta p{display:none;}
  .sticky-cta .btn{width:100%;}
  .sticky-cta{gap:0;}
}

/* roulang page: category3 */
:root{
    --bg-900:#05080F;
    --bg-800:#080E1C;
    --panel:rgba(255,255,255,0.04);
    --panel-strong:rgba(255,255,255,0.07);
    --line:rgba(255,255,255,0.08);
    --brand:#00E0B8;
    --brand-deep:#00B894;
    --brand-soft:rgba(0,224,184,0.14);
    --accent:#FF9A3C;
    --text-1:#EAF2FF;
    --text-2:#9FB0C9;
    --text-3:#6B7C96;
    --r-lg:20px;
    --r-md:16px;
    --r-sm:12px;
    --shadow-card:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
    --ease:cubic-bezier(.4,0,.2,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-900);
    color:var(--text-1);
    font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%}
  a{color:inherit;text-decoration:none}
  a:hover{color:var(--brand)}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
  h1,h2,h3,h4,p,ul,ol{margin:0}
  ul{list-style:none;padding:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px}

  .page-bg{
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background:
      radial-gradient(900px 520px at 78% 8%, rgba(0,224,184,.075), transparent 62%),
      radial-gradient(700px 460px at 8% 96%, rgba(0,224,184,.05), transparent 66%);
  }
  .page-bg::after{
    content:"";
    position:absolute;
    inset:0;
    background-image:linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(ellipse at 50% 30%, #000 5%, transparent 78%);
    -webkit-mask-image:radial-gradient(ellipse at 50% 30%, #000 5%, transparent 78%);
  }

  .container-x{max-width:1280px;margin:0 auto;padding:0 32px}

  /* ===== 品牌 ===== */
  .brand{display:flex;align-items:center;gap:11px;padding:6px 10px 6px 6px;border-radius:14px;transition:background .18s var(--ease)}
  .brand:hover{background:var(--panel);color:inherit}
  .brand-mark{
    width:34px;height:34px;flex:0 0 34px;
    display:flex;align-items:center;justify-content:center;
    border-radius:11px;
    background:var(--brand-soft);
    border:1px solid rgba(0,224,184,.35);
    color:var(--brand);
    font-size:15px;
    box-shadow:0 0 22px -8px rgba(0,224,184,.75);
  }
  .brand-text{font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap}

  /* ===== 桌面侧栏 ===== */
  .side-nav-wrap{display:none}
  .side-inner{
    height:100%;
    display:flex;
    flex-direction:column;
    gap:22px;
    padding:22px 16px;
    overflow-y:auto;
    scrollbar-width:thin;
  }
  .side-nav{display:flex;flex-direction:column;gap:4px}
  .side-link{
    position:relative;
    display:flex;align-items:center;gap:12px;
    padding:11px 14px;
    border-radius:var(--r-sm);
    font-size:14.5px;
    color:var(--text-2);
    transition:background .18s var(--ease),color .18s var(--ease);
  }
  .side-link i{width:18px;text-align:center;font-size:15px;color:var(--text-3);transition:color .18s var(--ease)}
  .side-link:hover{background:var(--panel);color:var(--text-1)}
  .side-link:hover i{color:var(--text-2)}
  .side-link.is-active{background:var(--panel-strong);color:var(--text-1);font-weight:600}
  .side-link.is-active i{color:var(--brand)}
  .side-link.is-active::before{
    content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
    width:3px;height:18px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 14px rgba(0,224,184,.8);
  }
  .side-divider{height:1px;background:var(--line);margin:2px 6px}
  .glass{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:var(--shadow-card);
  }
  .side-cta{padding:18px 16px}
  .side-cta p{font-size:13.5px;line-height:1.75;color:var(--text-2);margin-bottom:14px}
  .side-foot{font-size:12.5px;line-height:1.8;color:var(--text-3);padding:0 8px}
  .side-foot strong{display:block;color:var(--text-2);font-size:12.5px;letter-spacing:.04em;margin-bottom:4px}

  /* ===== 按钮 ===== */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-sm);
    padding:12px 22px;
    font-size:15px;font-weight:600;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(180deg,var(--brand),var(--brand-deep));
    color:var(--bg-900);
    box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
  }
  .btn-primary:hover{transform:translateY(-1px);color:var(--bg-900);box-shadow:0 0 0 1px rgba(0,224,184,.5), 0 16px 42px -12px rgba(0,224,184,.72)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(0,224,184,.28), 0 6px 18px -12px rgba(0,224,184,.5)}
  .btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text-1)}
  .btn-ghost:hover{background:var(--panel-strong);border-color:rgba(0,224,184,.45);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-sm{padding:8px 15px;font-size:13.5px;border-radius:10px}
  .btn-block{width:100%}

  /* ===== 移动顶栏与抽屉 ===== */
  .mobile-bar{
    position:fixed;top:0;left:0;right:0;height:60px;z-index:60;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:0 16px;
    background:rgba(5,8,15,.86);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
  }
  .mobile-brand{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:700}
  .mobile-brand .brand-mark{width:28px;height:28px;flex:0 0 28px;border-radius:9px;font-size:13px}
  .mobile-actions{display:flex;align-items:center;gap:8px}
  .hamburger{
    width:44px;height:44px;display:flex;align-items:center;justify-content:center;
    border-radius:var(--r-sm);border:1px solid var(--line);background:var(--panel);
    color:var(--text-1);font-size:16px;
  }
  .hamburger:hover{border-color:rgba(0,224,184,.45)}

  .drawer-mask{
    position:fixed;inset:0;z-index:70;
    background:rgba(4,8,16,.72);
    backdrop-filter:blur(4px);
    -webkit-backdrop-filter:blur(4px);
    opacity:0;visibility:hidden;
    transition:opacity .22s var(--ease),visibility .22s var(--ease);
  }
  .drawer-mask.show{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;left:0;bottom:0;z-index:80;
    width:280px;max-width:82vw;
    background:var(--bg-800);
    border-right:1px solid var(--line);
    transform:translateX(-102%);
    transition:transform .24s var(--ease);
    overflow-y:auto;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .drawer.show{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 8px}
  .drawer-close{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line);color:var(--text-2);background:var(--panel)}

  /* ===== 主内容布局 ===== */
  .main{position:relative;z-index:1;padding-top:76px;padding-bottom:80px}
  .site-footer{position:relative;z-index:1}
  @media (min-width:1024px){
    .side-nav-wrap{
      display:block;
      position:fixed;top:0;left:0;bottom:0;
      width:240px;z-index:50;
      background:rgba(8,14,28,.72);
      border-right:1px solid var(--line);
      backdrop-filter:blur(18px) saturate(140%);
      -webkit-backdrop-filter:blur(18px) saturate(140%);
    }
    .mobile-bar{display:none}
    .drawer,.drawer-mask{display:none}
    .main{margin-left:240px;padding-top:48px}
    .site-footer{margin-left:240px}
  }
  @media (min-width:1280px){
    .side-nav-wrap{width:264px}
    .main{margin-left:264px;padding-top:56px}
    .site-footer{margin-left:264px}
  }

  /* ===== 面包屑 ===== */
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
  .crumbs a{transition:color .18s var(--ease)}
  .crumbs .sep{color:var(--text-3);opacity:.7}
  .crumbs .cur{color:var(--text-1)}

  /* ===== Hero ===== */
  .cat-hero{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:24px;background:var(--bg-800)}
  .cat-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center right;
    opacity:.34;
  }
  .cat-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(96deg, rgba(5,8,15,.97) 0%, rgba(5,8,15,.88) 42%, rgba(5,8,15,.42) 100%);
  }
  .cat-hero-inner{position:relative;z-index:2;padding:58px 52px;max-width:840px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:9px;
    font-size:12px;letter-spacing:.12em;font-weight:600;
    color:var(--accent);margin-bottom:18px;
  }
  .eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:block}
  .cat-hero h1{
    font-size:clamp(30px,3.6vw,46px);
    font-weight:800;line-height:1.2;letter-spacing:-.01em;
    margin-bottom:18px;
  }
  .cat-hero h1 em{font-style:normal;color:var(--brand)}
  .lede{font-size:16.5px;line-height:1.9;color:var(--text-2);max-width:660px;margin-bottom:30px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:38px}
  .stat-row{display:flex;flex-wrap:wrap;gap:36px}
  .stat-item{border-left:1px solid var(--line);padding-left:16px}
  .stat-num{font-size:26px;font-weight:800;color:var(--accent);line-height:1.15;letter-spacing:-.02em}
  .stat-num small{font-size:13px;font-weight:600;margin-left:3px}
  .stat-label{font-size:12.5px;color:var(--text-3);letter-spacing:.04em}

  /* ===== 区块通用 ===== */
  .section{margin-top:104px}
  .section-head{max-width:760px;margin-bottom:38px}
  .section-head h2{font-size:clamp(23px,2.4vw,34px);font-weight:700;line-height:1.32;letter-spacing:-.005em}
  .section-head p{margin-top:14px;font-size:15.5px;line-height:1.9;color:var(--text-2)}
  .divider-dash{height:1px;background:repeating-linear-gradient(90deg,var(--line) 0 8px, transparent 8px 16px);margin:56px 0}

  /* ===== 规格网格 ===== */
  .spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .spec-card{
    display:flex;flex-direction:column;
    padding:26px 24px 22px;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--bg-800);
    transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
  }
  .spec-card:hover{transform:translateY(-3px);border-color:rgba(0,224,184,.35);background:#0A1122}
  .spec-index{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--accent);opacity:.85}
  .spec-title{font-size:18px;font-weight:600;line-height:1.45;margin:10px 0 14px}
  .spec-value{display:flex;align-items:baseline;gap:5px;margin-bottom:12px}
  .spec-value .num{font-size:42px;font-weight:800;line-height:1;color:var(--text-1);letter-spacing:-.03em}
  .spec-value .unit{font-size:13px;color:var(--accent);font-weight:600}
  .spec-desc{font-size:14.5px;line-height:1.85;color:var(--text-2);flex:1}
  .spec-link{
    display:inline-flex;align-items:center;gap:8px;
    margin-top:18px;padding-top:16px;
    border-top:1px solid var(--line);
    font-size:13.5px;font-weight:600;color:var(--text-2);
    transition:color .18s var(--ease),gap .18s var(--ease);
  }
  .spec-link i{font-size:12px;transition:transform .18s var(--ease)}
  .spec-link:hover{color:var(--brand);gap:12px}
  .spec-link:hover i{transform:translateX(2px)}

  /* ===== 要点清单 ===== */
  .points-wrap{display:grid;grid-template-columns:4fr 8fr;gap:44px;align-items:start}
  .point-list{display:grid;gap:16px}
  .point-list li{position:relative;padding-left:22px;font-size:15.5px;line-height:1.88;color:var(--text-2)}
  .point-list li::before{
    content:"";position:absolute;left:0;top:.72em;
    width:8px;height:8px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 12px rgba(0,224,184,.55);
  }
  .point-list li strong{color:var(--text-1);font-weight:600}

  /* ===== 图文块 ===== */
  .split{display:grid;grid-template-columns:6fr 6fr;gap:40px;align-items:center}
  .figure{
    position:relative;border-radius:var(--r-md);overflow:hidden;
    border:1px solid var(--line);
    aspect-ratio:16/10;
    background:var(--bg-800);
  }
  .figure img{width:100%;height:100%;object-fit:cover}
  .figure::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(5,8,15,0) 40%, rgba(5,8,15,.78) 100%);
  }
  .figure figcaption{
    position:absolute;left:20px;bottom:16px;z-index:2;
    font-size:13px;color:var(--text-2);
  }
  .split-body h3{font-size:20px;font-weight:600;line-height:1.5;margin-bottom:16px}
  .split-body p{font-size:15.5px;line-height:1.9;color:var(--text-2);margin-bottom:14px}
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
  .tag{
    display:inline-flex;align-items:center;gap:7px;
    padding:6px 14px;border-radius:999px;
    font-size:12.5px;font-weight:600;
    border:1px solid rgba(255,154,60,.4);
    color:var(--accent);
    background:rgba(255,154,60,.08);
  }
  .tag.alt{border-color:rgba(0,224,184,.35);color:var(--brand);background:var(--brand-soft)}

  /* ===== FAQ ===== */
  .faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:44px;align-items:start}
  .faq-col-title h2{font-size:clamp(23px,2.4vw,32px);font-weight:700;line-height:1.34}
  .faq-col-title p{margin-top:14px;font-size:15px;line-height:1.88;color:var(--text-2)}
  .faq-item{
    border:1px solid var(--line);
    border-radius:var(--r-md);
    background:var(--panel);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    margin-bottom:12px;
    overflow:hidden;
    transition:border-color .2s var(--ease);
  }
  .faq-item.open{border-color:rgba(0,224,184,.35)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;
    font-size:15.5px;font-weight:600;line-height:1.65;color:var(--text-1);
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:var(--brand)}
  .faq-q i{font-size:13px;color:var(--text-3);transition:transform .24s var(--ease),color .24s var(--ease);flex:0 0 auto}
  .faq-item.open .faq-q{color:var(--brand)}
  .faq-item.open .faq-q i{transform:rotate(180deg);color:var(--brand)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
  .faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--text-2);border-top:1px solid var(--line);padding-top:16px;margin:0 22px 20px;padding-left:0;padding-right:0}

  /* ===== 其它分区窄卡 ===== */
  .link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .link-card{
    display:flex;flex-direction:column;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--bg-800);
    overflow:hidden;
    transition:transform .2s var(--ease),border-color .2s var(--ease);
  }
  .link-card:hover{transform:translateY(-3px);border-color:rgba(0,224,184,.4)}
  .link-card .thumb{aspect-ratio:16/10;overflow:hidden;position:relative}
  .link-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
  .link-card:hover .thumb img{transform:scale(1.04)}
  .link-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,15,.05),rgba(5,8,15,.6))}
  .link-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;gap:9px}
  .link-card h3{font-size:17px;font-weight:600;line-height:1.5}
  .link-card p{font-size:14px;line-height:1.8;color:var(--text-2);flex:1}
  .link-card .arrow{font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:8px}

  /* ===== CTA 条 ===== */
  .cta-bar{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
    padding:34px 38px;
    border-radius:24px;
    background:var(--panel);
    border:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:var(--shadow-card);
    position:relative;
    overflow:hidden;
  }
  .cta-bar::before{
    content:"";position:absolute;top:-70px;right:-40px;width:280px;height:280px;
    background:radial-gradient(circle, rgba(0,224,184,.16), transparent 68%);
    pointer-events:none;
  }
  .cta-bar h2{font-size:clamp(20px,2vw,26px);font-weight:700;line-height:1.4;position:relative;z-index:2}
  .cta-bar p{margin-top:8px;font-size:14.5px;color:var(--text-2);position:relative;z-index:2}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2}

  /* ===== 页脚 ===== */
  .site-footer{
    border-top:1px solid var(--line);
    background:rgba(8,14,28,.6);
    padding:64px 0 32px;
    margin-top:96px;
  }
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
  .footer-desc{font-size:14px;line-height:1.88;color:var(--text-2);margin-top:14px;max-width:340px}
  .footer-title{font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--text-3);margin-bottom:16px}
  .footer-links{display:flex;flex-direction:column;gap:11px}
  .footer-links a{font-size:14px;color:var(--text-2);transition:color .18s var(--ease)}
  .footer-links a:hover{color:var(--brand)}
  .footer-contact{font-size:13.5px;line-height:1.95;color:var(--text-2)}
  .footer-contact strong{color:var(--text-1);font-weight:600}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
    margin-top:44px;padding-top:22px;
    border-top:1px solid var(--line);
    font-size:13px;color:var(--text-3);
  }

  /* ===== 响应式 ===== */
  @media (max-width:1279px){
    .spec-grid{grid-template-columns:repeat(3,1fr)}
  }
  @media (max-width:1023px){
    .container-x{padding:0 24px}
    .section{margin-top:80px}
    .spec-grid{grid-template-columns:repeat(2,1fr)}
    .points-wrap{grid-template-columns:1fr;gap:26px}
    .split{grid-template-columns:1fr;gap:26px}
    .faq-wrap{grid-template-columns:1fr;gap:26px}
    .link-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
    .cat-hero-inner{padding:46px 38px}
  }
  @media (max-width:639px){
    .container-x{padding:0 20px}
    .section{margin-top:60px}
    .cat-hero-inner{padding:34px 22px}
    .lede{font-size:15.5px}
    .stat-row{gap:22px}
    .stat-item{padding-left:12px}
    .stat-num{font-size:23px}
    .spec-grid{grid-template-columns:1fr}
    .link-grid{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .cta-bar{padding:26px 22px}
    .hero-actions .btn{width:100%}
    .cta-actions .btn{width:100%}
    .spec-value .num{font-size:36px}
    .faq-q{padding:16px 18px;font-size:15px}
    .faq-a-inner{margin:0 18px 18px;padding-top:14px}
    .site-footer{padding-top:48px}
  }

/* roulang page: category2 */
:root{
  --bg-900:#05080F;
  --bg-800:#080E1C;
  --panel:rgba(255,255,255,.04);
  --panel-strong:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.08);
  --brand:#00E0B8;
  --brand-deep:#00B894;
  --brand-soft:rgba(0,224,184,.14);
  --accent:#FF9A3C;
  --text-1:#EAF2FF;
  --text-2:#9FB0C9;
  --text-3:#6B7C96;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shell:240px;
  --shadow-card:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:auto 0 -30% 0;
  height:70vh;
  background:radial-gradient(60% 60% at 50% 100%, rgba(0,224,184,.08), rgba(0,224,184,0) 70%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:.5;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{font-weight:700;color:var(--text-1)}
p{margin:0 0 1.15em}
p:last-child{margin-bottom:0}

.container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* ---------- 左侧 App Shell ---------- */
.side-shell{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--shell);
  padding:24px 18px 22px;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg, rgba(8,14,28,.97), rgba(5,8,15,.97));
  border-right:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  z-index:80;
  transform:translateX(-100%);
  transition:transform .24s var(--ease);
  overflow-y:auto;
}
body.nav-open .side-shell{transform:translateX(0)}
@media(min-width:1024px){
  .side-shell{transform:none}
  :root{--shell:240px}
}
@media(min-width:1280px){
  :root{--shell:264px}
}

.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 20px;text-decoration:none}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;
  border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04211C;
  font-size:15px;
  box-shadow:0 0 0 1px rgba(0,224,184,.35),0 12px 28px -12px rgba(0,224,184,.6);
}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.01em;color:var(--text-1);line-height:1.3}

.side-nav{display:flex;flex-direction:column;gap:4px;margin:6px 0 0}
.side-link{
  position:relative;
  display:flex;align-items:center;gap:11px;
  min-height:44px;
  padding:10px 12px;
  border-radius:var(--r-sm);
  font-size:14.5px;
  color:var(--text-2);
  transition:background .18s var(--ease), color .18s var(--ease);
}
.side-link i{font-size:15px;color:var(--text-3);transition:color .18s var(--ease);width:18px;text-align:center}
.side-link:hover{background:var(--panel);color:var(--text-1)}
.side-link:hover i{color:var(--brand)}
.side-link.is-active{background:var(--panel-strong);color:var(--text-1)}
.side-link.is-active i{color:var(--brand)}
.side-link.is-active::before{
  content:"";position:absolute;left:-18px;top:9px;bottom:9px;width:3px;
  border-radius:0 3px 3px 0;background:var(--brand);
}

.side-divider{height:1px;background:var(--line);margin:18px 4px}

.side-cta{
  margin-top:auto;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:16px;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}
.side-cta p{font-size:13.5px;color:var(--text-2);line-height:1.8;margin:0 0 12px}
.side-cta .btn{width:100%}

.side-contact{margin-top:16px;font-size:12.5px;color:var(--text-3);line-height:1.9}
.side-contact strong{display:block;color:var(--text-2);font-weight:600;font-size:12.5px}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;height:60px;
  display:flex;align-items:center;gap:10px;
  padding:0 14px;
  background:rgba(5,8,15,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  z-index:70;
}
.topbar .brand{padding:0;flex:1;min-width:0}
.topbar .brand-text{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.icon-btn{
  width:44px;height:44px;flex:0 0 44px;
  display:grid;place-items:center;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text-1);
  font-size:16px;
  cursor:pointer;
  transition:background .18s var(--ease), border-color .18s var(--ease);
}
.icon-btn:hover{background:var(--panel-strong);border-color:var(--brand-soft)}
.topbar-cta{min-height:38px;padding:0 14px;font-size:13.5px}
@media(max-width:400px){.topbar-cta{display:none}}
@media(min-width:1024px){.topbar{display:none}}

.nav-mask{
  position:fixed;inset:0;
  background:rgba(4,8,16,.72);
  backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;
  transition:opacity .22s var(--ease);
  z-index:75;
}
body.nav-open .nav-mask{opacity:1;pointer-events:auto}
@media(min-width:1024px){.nav-mask{display:none}}

/* ---------- 主内容 ---------- */
.page-main{
  position:relative;
  z-index:1;
  padding-top:60px;
  padding-bottom:120px;
  min-height:100vh;
}
@media(min-width:1024px){
  .page-main{padding-top:0;padding-left:var(--shell)}
}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  cursor:pointer;
  transition:transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#04211C;
  box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
}
.btn-primary:hover{
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(0,224,184,.5), 0 16px 42px -12px rgba(0,224,184,.75);
  filter:brightness(1.06);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(0,224,184,.3), 0 8px 20px -14px rgba(0,224,184,.45)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text-1)}
.btn-ghost:hover{background:var(--panel-strong);border-color:var(--brand-soft);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;font-weight:600;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--text-2);
  line-height:1.7;
}
.badge-warm{border-color:rgba(255,154,60,.42);color:var(--accent);background:rgba(255,154,60,.09)}
.badge-brand{border-color:rgba(0,224,184,.42);color:var(--brand);background:var(--brand-soft)}

.text-link{
  color:var(--text-1);
  transition:color .18s var(--ease), text-decoration-color .18s var(--ease);
}
.text-link:hover{
  color:var(--brand);
  text-decoration:underline;
  text-decoration-color:var(--accent);
  text-decoration-thickness:2px;
  text-underline-offset:4px;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;font-weight:600;letter-spacing:.16em;
  color:var(--brand);
  margin:0 0 16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--brand);border-radius:2px}

.section{padding:96px 0}
.section-tight{padding:72px 0}
@media(max-width:1023px){.section{padding:76px 0}.section-tight{padding:60px 0}}
@media(max-width:640px){.section{padding:56px 0}.section-tight{padding:48px 0}}

.section-h2{
  font-size:clamp(23px,2.6vw,34px);
  line-height:1.3;
  font-weight:700;
  margin:0 0 14px;
  letter-spacing:-.005em;
}
.section-sub{color:var(--text-2);font-size:16px;max-width:700px;margin:0 0 40px;line-height:1.9}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin:0 0 22px;
}
.crumb a{color:var(--text-3);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.65}
.crumb .current{color:var(--text-1)}

/* ---------- Banner ---------- */
.banner{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background-color:var(--bg-800);
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  padding:112px 0 72px;
}
.banner::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg, rgba(5,8,15,.97) 0%, rgba(5,8,15,.88) 42%, rgba(5,8,15,.58) 100%);
  pointer-events:none;
}
.banner .container-x{z-index:2}
.banner h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.01em;
  margin:0 0 18px;
  max-width:16em;
}
.banner .lead{
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  max-width:720px;
  margin:0 0 30px;
}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}
.banner .badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
@media(max-width:767px){
  .banner{padding:88px 0 56px}
  .banner h1{font-size:clamp(28px,8vw,34px)}
  .banner .lead{font-size:15.5px}
}

/* ---------- 对照双栏 ---------- */
.compare-group + .compare-group{
  margin-top:56px;
  padding-top:56px;
  border-top:1px dashed var(--line);
}
.compare-head{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  margin:0 0 22px;
}
.compare-head h3{font-size:20px;font-weight:700;margin:0}
.compare-head span{font-size:13px;color:var(--text-3)}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
@media(max-width:900px){.compare-grid{grid-template-columns:1fr}}
.compare-card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.compare-card:hover{transform:translateY(-2px);border-color:var(--brand-soft)}
.compare-card.is-strong{
  border-color:rgba(0,224,184,.3);
  background:linear-gradient(180deg, rgba(0,224,184,.075), rgba(255,255,255,.03));
}
.compare-card h4{font-size:18px;font-weight:600;margin:14px 0 0;line-height:1.5}
.compare-card .note{font-size:14px;color:var(--text-3);margin:8px 0 0}
.check-list{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}
.check-list li{position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--text-2)}
.check-list li::before{
  content:"";position:absolute;left:0;top:.72em;
  width:8px;height:8px;border-radius:2px;
  background:var(--brand);
}
.check-list.is-muted li::before{background:var(--text-3)}
.compare-tag{
  position:absolute;top:-13px;right:22px;
}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  margin-top:8px;
}
.stat-cell{padding:28px 24px;border-right:1px solid var(--line)}
.stat-cell:last-child{border-right:0}
.stat-num{font-size:34px;font-weight:800;color:var(--brand);line-height:1.1;letter-spacing:-.02em}
.stat-label{font-size:13px;color:var(--text-3);margin-top:8px;line-height:1.7}
@media(max-width:900px){
  .stat-strip{grid-template-columns:1fr 1fr}
  .stat-cell:nth-child(2){border-right:0}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
}
@media(max-width:520px){
  .stat-strip{grid-template-columns:1fr}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line)}
  .stat-cell:last-child{border-bottom:0}
}

/* ---------- 图文区 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
@media(max-width:900px){.split{grid-template-columns:1fr;gap:28px}}
.media{
  position:relative;
  border-radius:var(--r-md);
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.media img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(5,8,15,0) 42%, rgba(5,8,15,.72) 100%);
  pointer-events:none;
}
.split-body p{color:var(--text-2);font-size:15.5px;line-height:1.9;margin:0 0 16px}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:52px}
@media(max-width:900px){.faq-grid{grid-template-columns:1fr;gap:26px}}
.faq-list{display:flex;flex-direction:column}
.faq-item{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:12px;
  overflow:hidden;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  transition:border-color .2s var(--ease), background .2s var(--ease);
}
.faq-item:hover{border-color:var(--brand-soft)}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  background:none;border:0;
  color:var(--text-1);
  font-size:16px;font-weight:600;
  text-align:left;
  cursor:pointer;
  min-height:44px;
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q i{color:var(--text-3);font-size:13px;transition:transform .24s var(--ease), color .2s var(--ease)}
.faq-item.is-open{border-color:rgba(0,224,184,.28);background:var(--panel-strong)}
.faq-item.is-open .faq-q{color:var(--brand)}
.faq-item.is-open .faq-q i{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{
  margin:0;
  padding:0 22px 20px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.9;
}

/* ---------- 分类互链窄卡 ---------- */
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.link-cards{grid-template-columns:1fr}}
.link-card{
  display:block;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px;
  color:var(--text-1);
  transition:transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.link-card:hover{transform:translateY(-3px);border-color:var(--brand-soft);background:var(--panel-strong)}
.link-card i{font-size:20px;color:var(--brand)}
.link-card h3{font-size:17px;font-weight:600;margin:12px 0 8px;line-height:1.5}
.link-card p{margin:0;font-size:14px;color:var(--text-2);line-height:1.8}
.link-card .go{
  margin-top:16px;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--accent);
}

/* ---------- CTA 玻璃条 ---------- */
.cta-band{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:clamp(21px,2.2vw,28px);margin:0 0 10px;line-height:1.35}
.cta-band p{color:var(--text-2);font-size:15px;margin:0;max-width:560px}
@media(max-width:640px){.cta-band{padding:28px;gap:22px}}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  padding:64px 0 28px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(8,14,28,.5), rgba(5,8,15,.9));
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}
.footer-title{font-size:13px;font-weight:600;color:var(--text-3);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14.5px;color:var(--text-2);transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--brand)}
.footer-desc{font-size:14.5px;color:var(--text-2);line-height:1.9;margin:14px 0 0;max-width:330px}
.footer-contact{font-size:14.5px;color:var(--text-2);line-height:2}
.footer-contact strong{display:block;color:var(--text-1);font-weight:600;font-size:14px}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;
  z-index:90;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;
  padding:10px 20px calc(10px + env(safe-area-inset-bottom));
  background:rgba(8,14,28,.88);
  border-top:1px solid var(--line);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .24s var(--ease), transform .24s var(--ease);
}
.sticky-bar.is-visible{opacity:1;transform:none;pointer-events:auto}
.sticky-bar .tip{font-size:14px;color:var(--text-2)}
.sticky-bar .tip strong{color:var(--text-1);font-weight:600}
@media(min-width:1024px){
  .sticky-bar{padding-left:calc(var(--shell) + 20px)}
}
@media(max-width:640px){
  .sticky-bar{min-height:56px;padding:8px 14px calc(8px + env(safe-area-inset-bottom))}
  .sticky-bar .tip{font-size:13px;line-height:1.5;flex:1}
  .sticky-bar .btn{flex:0 0 auto;padding:0 16px;font-size:14px;min-height:40px}
}
@media(max-width:420px){
  .sticky-bar .tip span.hide-xs{display:none}
}

/* roulang page: category4 */
:root{
    --bg-900:#05080F;
    --bg-800:#080E1C;
    --panel:rgba(255,255,255,0.04);
    --panel-strong:rgba(255,255,255,0.07);
    --line:rgba(255,255,255,0.08);
    --brand:#00E0B8;
    --brand-deep:#00B894;
    --brand-soft:rgba(0,224,184,0.14);
    --accent:#FF9A3C;
    --text-1:#EAF2FF;
    --text-2:#9FB0C9;
    --text-3:#6B7C96;
    --r-lg:20px;
    --r-md:16px;
    --r-sm:12px;
    --shadow-card:0 24px 60px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.06);
    --glass:blur(18px) saturate(140%);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg-900);
    color:var(--text-1);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color .18s ease;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  ul{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}

  .bg-decor{
    position:fixed;inset:0;z-index:0;pointer-events:none;
    background-image:
      radial-gradient(120% 80% at 85% 108%, rgba(0,224,184,.075), transparent 62%),
      linear-gradient(to right, rgba(255,255,255,.03) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size:auto, 64px 64px, 64px 64px;
  }

  /* ============ 侧边导航 ============ */
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;width:240px;z-index:60;
    display:flex;flex-direction:column;gap:18px;
    padding:24px 18px;
    background:rgba(8,14,28,.84);
    backdrop-filter:var(--glass);
    -webkit-backdrop-filter:var(--glass);
    border-right:1px solid var(--line);
    overflow-y:auto;
    transition:transform .24s ease;
  }
  .brand{display:flex;align-items:center;gap:10px;padding:6px 8px 14px;}
  .brand-mark{
    width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
    border-radius:10px;font-size:15px;color:var(--brand);
    background:linear-gradient(135deg,rgba(0,224,184,.24),rgba(0,224,184,.06));
    border:1px solid rgba(0,224,184,.35);
  }
  .brand-text{font-size:16px;font-weight:700;letter-spacing:.01em;line-height:1.3;}

  .side-nav{display:flex;flex-direction:column;gap:6px;padding-top:16px;border-top:1px solid var(--line);}
  .side-link{
    position:relative;display:flex;align-items:center;gap:12px;
    padding:12px 14px;border-radius:var(--r-sm);
    color:var(--text-2);font-size:14.5px;font-weight:500;
    transition:background .18s ease,color .18s ease;
  }
  .side-link i{width:18px;text-align:center;font-size:15px;color:var(--text-3);transition:color .18s ease;}
  .side-link:hover{background:var(--panel);color:var(--text-1);}
  .side-link.is-active{background:var(--panel-strong);color:var(--text-1);}
  .side-link.is-active i{color:var(--brand);}
  .side-link.is-active::before{
    content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;
    border-radius:3px;background:var(--brand);
  }

  .side-cta{
    margin-top:6px;padding:18px;border-radius:var(--r-md);
    background:var(--panel);border:1px solid var(--line);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
    box-shadow:var(--shadow-card);
  }
  .side-cta p{font-size:13.5px;color:var(--text-2);line-height:1.8;margin-bottom:14px;}
  .side-foot{margin-top:auto;padding:16px 8px 4px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-3);line-height:1.9;}
  .side-foot strong{color:var(--text-2);font-weight:600;}

  /* ============ 移动顶栏 ============ */
  .topbar{
    position:fixed;top:0;left:0;right:0;height:60px;z-index:70;
    display:none;align-items:center;gap:12px;padding:0 16px;
    background:rgba(5,8,15,.88);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
    border-bottom:1px solid var(--line);
  }
  .topbar .brand{padding:0;flex:1;min-width:0;}
  .topbar .brand-text{font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .icon-btn{
    width:44px;height:44px;flex:0 0 44px;display:grid;place-items:center;
    border-radius:var(--r-sm);border:1px solid var(--line);color:var(--text-1);
    background:var(--panel);transition:background .18s ease,border-color .18s ease;
  }
  .icon-btn:hover{background:var(--panel-strong);border-color:var(--brand-soft);}

  .overlay{
    position:fixed;inset:0;z-index:55;
    background:rgba(4,8,16,.72);
    backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
    opacity:0;pointer-events:none;transition:opacity .24s ease;
  }
  .overlay.is-open{opacity:1;pointer-events:auto;}

  /* ============ 主体容器 ============ */
  .main-area{
    position:relative;z-index:1;margin-left:240px;min-height:100vh;
    display:flex;flex-direction:column;
  }
  .container-x{width:100%;max-width:1280px;margin:0 auto;padding:0 32px;}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--brand),var(--brand-deep));
    color:#05080F;
    box-shadow:0 0 0 1px rgba(0,224,184,.35), 0 12px 32px -12px rgba(0,224,184,.55);
  }
  .btn-primary:hover{
    transform:translateY(-1px);
    box-shadow:0 0 0 1px rgba(0,224,184,.45), 0 16px 42px -12px rgba(0,224,184,.72);
    filter:brightness(1.05);
  }
  .btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(0,224,184,.3), 0 6px 18px -12px rgba(0,224,184,.5);}
  .btn-ghost{
    background:transparent;border:1px solid var(--line);color:var(--text-1);
  }
  .btn-ghost:hover{background:var(--panel-strong);border-color:var(--brand-soft);transform:translateY(-1px);}
  .btn-ghost:active{transform:translateY(0);}
  .btn-sm{padding:10px 16px;font-size:14px;}

  /* ============ 面包屑 ============ */
  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    padding:32px 0 0;font-size:13px;color:var(--text-3);
  }
  .crumb a:hover{color:var(--brand);}
  .crumb .sep{opacity:.55;}
  .crumb .current{color:var(--text-1);}

  /* ============ 栏目头 ============ */
  .page-hero{
    position:relative;margin-top:24px;overflow:hidden;
    border:1px solid var(--line);border-radius:var(--r-lg);
    background:var(--bg-800);
  }
  .page-hero::before{
    content:"";position:absolute;inset:0;
    background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    opacity:.34;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(115deg,rgba(5,8,15,.95) 0%,rgba(5,8,15,.82) 44%,rgba(5,8,15,.38) 100%);
  }
  .page-hero-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.4fr .6fr;gap:40px;
    padding:52px 44px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:10px;
    font-size:12px;letter-spacing:.16em;color:var(--brand);
  }
  .eyebrow::before{content:"";width:2px;height:14px;border-radius:2px;background:var(--brand);}
  h1.page-title{
    margin-top:18px;
    font-size:clamp(28px,4vw,46px);
    font-weight:800;line-height:1.18;letter-spacing:-.01em;
  }
  .page-lead{margin-top:18px;max-width:58ch;color:var(--text-2);font-size:16px;line-height:1.9;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
  .hero-side{
    align-self:end;
    padding:22px 24px;border-radius:var(--r-md);
    background:var(--panel);border:1px solid var(--line);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
    box-shadow:var(--shadow-card);
  }
  .hero-side .fact{display:flex;align-items:baseline;gap:10px;padding:8px 0;}
  .hero-side .fact + .fact{border-top:1px solid var(--line);}
  .hero-side .num{font-size:24px;font-weight:800;color:var(--accent);line-height:1.2;}
  .hero-side .lbl{font-size:13.5px;color:var(--text-2);line-height:1.6;}

  /* ============ 板块 ============ */
  section.block{padding:96px 0 0;}
  section.block:last-of-type{padding-bottom:0;}
  .sec-head{max-width:72ch;margin-bottom:40px;}
  .sec-head h2{
    font-size:clamp(23px,2.6vw,34px);
    font-weight:700;line-height:1.3;letter-spacing:-.005em;
    margin-top:12px;
  }
  .sec-head p{margin-top:14px;color:var(--text-2);font-size:15.5px;line-height:1.9;}

  .tag{
    display:inline-flex;align-items:center;
    padding:4px 12px;border-radius:999px;
    font-size:12px;font-weight:600;letter-spacing:.04em;
    color:var(--accent);background:rgba(255,154,60,.08);
    border:1px solid rgba(255,154,60,.42);
  }
  .tag-brand{color:var(--brand);background:var(--brand-soft);border-color:rgba(0,224,184,.38);}

  /* ============ 场景图集 ============ */
  .scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;align-items:start;}
  .scene-card{
    border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
    background:#0A1220;
    box-shadow:var(--shadow-card);
    transition:transform .2s ease,border-color .2s ease;
  }
  .scene-card:hover{transform:translateY(-2px);border-color:rgba(0,224,184,.3);}
  .scene-media{position:relative;overflow:hidden;aspect-ratio:4/3;background:#080E1C;}
  .scene-card:nth-child(even) .scene-media{aspect-ratio:16/10;}
  .scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
  .scene-card:hover .scene-media img{transform:scale(1.04);}
  .scene-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,8,15,0) 42%,rgba(5,8,15,.85) 100%);
  }
  .scene-body{padding:24px 26px 28px;}
  .scene-body h3{margin-top:14px;font-size:19px;font-weight:600;line-height:1.45;}
  .scene-body p{margin-top:10px;color:var(--text-2);font-size:14.8px;line-height:1.9;}
  .dot-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
  .dot-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7;}
  .dot-list li::before{
    content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;
    border-radius:2px;background:var(--brand);
  }

  /* ============ 处理路径 ============ */
  .steps{margin-top:8px;max-width:900px;}
  .step{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:22px;padding-bottom:34px;}
  .step:last-child{padding-bottom:0;}
  .step-no{
    width:56px;height:56px;display:grid;place-items:center;
    border-radius:var(--r-md);font-size:17px;font-weight:800;
    color:var(--accent);background:rgba(255,154,60,.08);
    border:1px solid rgba(255,154,60,.28);
  }
  .step:not(:last-child)::before{
    content:"";position:absolute;left:27px;top:66px;bottom:8px;width:1px;
    background:linear-gradient(180deg,rgba(0,224,184,.42),rgba(255,255,255,.06));
  }
  .step-body h3{font-size:18px;font-weight:600;line-height:1.45;}
  .step-body p{margin-top:8px;color:var(--text-2);font-size:14.8px;line-height:1.9;}

  /* ============ FAQ ============ */
  .faq-wrap{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:52px;}
  .faq-item{
    border:1px solid var(--line);border-radius:var(--r-md);
    background:var(--panel);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
    margin-bottom:12px;overflow:hidden;
    transition:border-color .2s ease,background .2s ease;
  }
  .faq-item.is-open{border-color:rgba(0,224,184,.3);background:var(--panel-strong);}
  .faq-q{
    display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;text-align:left;
    font-size:16px;font-weight:600;line-height:1.6;color:var(--text-1);
    transition:color .18s ease;min-height:44px;
  }
  .faq-item.is-open .faq-q{color:var(--brand);}
  .faq-q i{flex:0 0 auto;color:var(--text-3);font-size:13px;transition:transform .24s ease,color .24s ease;}
  .faq-item.is-open .faq-q i{transform:rotate(180deg);color:var(--brand);}
  .faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .24s ease,opacity .24s ease;}
  .faq-item.is-open .faq-a{max-height:340px;opacity:1;}
  .faq-a p{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.9;}

  /* ============ 其它分类 ============ */
  .link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
  .link-card{
    display:flex;flex-direction:column;gap:10px;
    padding:24px;border-radius:var(--r-md);
    border:1px solid var(--line);background:rgba(255,255,255,.02);
    transition:transform .2s ease,border-color .2s ease,background .2s ease;
  }
  .link-card:hover{transform:translateY(-2px);border-color:rgba(0,224,184,.3);background:var(--panel);}
  .link-card h3{font-size:17px;font-weight:600;line-height:1.45;}
  .link-card p{color:var(--text-2);font-size:14px;line-height:1.85;}
  .link-card .arrow{margin-top:auto;padding-top:12px;color:var(--brand);font-size:14px;font-weight:600;}

  /* ============ 底部 CTA 条 ============ */
  .cta-band{
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
    padding:40px 44px;margin:96px 0 0;
    border:1px solid rgba(0,224,184,.22);border-radius:var(--r-lg);
    background:linear-gradient(120deg,rgba(0,224,184,.10),rgba(255,255,255,.02) 58%);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
  }
  .cta-band h2{font-size:clamp(21px,2.3vw,28px);font-weight:700;line-height:1.35;}
  .cta-band p{margin-top:10px;color:var(--text-2);font-size:15px;line-height:1.85;max-width:56ch;}

  /* ============ 页脚 ============ */
  .site-footer{margin-top:96px;border-top:1px solid var(--line);background:rgba(8,14,28,.72);}
  .footer-grid{
    display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:44px;
    padding:64px 0 44px;
  }
  .footer-title{font-size:13px;letter-spacing:.08em;color:var(--text-3);margin-bottom:16px;}
  .footer-links{display:flex;flex-direction:column;gap:12px;}
  .footer-links a{color:var(--text-2);font-size:14.5px;min-height:26px;display:inline-block;}
  .footer-links a:hover{color:var(--brand);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px;}
  .footer-desc{margin-top:14px;max-width:42ch;color:var(--text-2);font-size:14.5px;line-height:1.9;}
  .footer-contact{color:var(--text-2);font-size:14.5px;line-height:2.05;}
  .footer-contact strong{color:var(--text-1);font-weight:600;}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
    padding:22px 0 96px;border-top:1px solid var(--line);
    color:var(--text-3);font-size:13px;
  }

  /* ============ 底部转化条 ============ */
  .sticky-cta{
    position:fixed;left:240px;right:0;bottom:0;z-index:50;height:64px;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:0 32px;padding-bottom:env(safe-area-inset-bottom);
    background:rgba(8,14,28,.88);
    backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);
    border-top:1px solid var(--line);
    transform:translateY(110%);opacity:0;
    transition:transform .26s ease,opacity .26s ease;
  }
  .sticky-cta.is-visible{transform:translateY(0);opacity:1;}
  .sticky-cta .tip{font-size:14.5px;color:var(--text-2);}

  /* ============ 断点 ============ */
  @media (min-width:1280px){
    .sidebar{width:264px;padding:28px 22px;}
    .main-area{margin-left:264px;}
    .sticky-cta{left:264px;}
  }
  @media (max-width:1023px){
    .sidebar{width:280px;transform:translateX(-100%);box-shadow:0 24px 60px -24px rgba(0,0,0,.85);}
    .sidebar.is-open{transform:translateX(0);}
    .topbar{display:flex;}
    .main-area{margin-left:0;padding-top:60px;}
    .sticky-cta{left:0;height:56px;padding:0 18px;padding-bottom:env(safe-area-inset-bottom);}
    .sticky-cta .tip{display:none;}
    .sticky-cta .btn{flex:1;}
    .page-hero-inner{grid-template-columns:1fr;gap:28px;padding:36px 26px;}
    .hero-side{align-self:stretch;}
    .faq-wrap{grid-template-columns:1fr;gap:30px;}
    .scene-grid{grid-template-columns:1fr;gap:22px;}
    .scene-card:nth-child(even) .scene-media{aspect-ratio:4/3;}
    .link-cards{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:52px 0 36px;}
    section.block{padding:72px 0 0;}
    .cta-band{margin-top:72px;padding:32px 28px;}
    .site-footer{margin-top:72px;}
  }
  @media (max-width:640px){
    .container-x{padding:0 20px;}
    .crumb{padding-top:24px;}
    .page-hero{margin-top:18px;}
    .page-hero-inner{padding:30px 20px;}
    .hero-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{padding-bottom:104px;}
    section.block{padding:56px 0 0;}
    .cta-band{margin-top:56px;padding:28px 20px;}
    .cta-band .btn{width:100%;}
    .scene-body{padding:20px 20px 24px;}
    .step{grid-template-columns:44px minmax(0,1fr);gap:16px;}
    .step-no{width:44px;height:44px;font-size:15px;}
    .step:not(:last-child)::before{left:21px;top:54px;}
  }
  @media (max-width:1023px){
    .overlay{display:block;}
  }
  @media (min-width:1024px){
    .overlay{display:none;}
  }