/* roulang page: index */
:root{
  --ink-900:#070C15;
  --ink-800:#0C1420;
  --ink-700:#131E2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand-500:#22D3C5;
  --brand-400:#5FF0E3;
  --brand-700:#0E8F87;
  --accent-500:#FF8A4C;
  --accent-400:#FFB27A;
  --t-hi:#EAF2F8;
  --t-mid:#A7B6C6;
  --t-low:#6B7C8E;
  --paper:#F4F7FA;
  --paper-line:#DCE4EC;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--ink-900);color:var(--t-hi);
  font-family:"HarmonyOS Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.7;font-weight:400;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28;color:var(--t-hi)}
p{margin:0}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:8px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container-x{padding:0 28px}}

/* ---------- 通用组件 ---------- */
.glass{
  background:rgba(255,255,255,.06);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.10);
}
.card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:20px;
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.card:hover{border-color:rgba(95,240,227,.4);transform:translateY(-2px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:12px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.btn-primary{background:var(--brand-500);color:#04211F;border-color:var(--brand-500)}
.btn-primary:hover{background:var(--brand-400);border-color:var(--brand-400);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(34,211,197,.4),0 14px 34px -14px rgba(34,211,197,.75)}
.btn-primary:active{background:var(--brand-700);border-color:var(--brand-700);transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t-hi)}
.btn-ghost:hover{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.32);transform:translateY(-1px)}
.btn-ghost:active{background:rgba(255,255,255,.02);transform:translateY(0)}
.btn-text{color:var(--brand-400);font-weight:600;display:inline-flex;align-items:center;gap:6px;min-height:44px;text-underline-offset:4px}
.btn-text:hover{text-decoration:underline;color:var(--brand-300)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:10px}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.5}
.badge-brand{background:rgba(34,211,197,.12);color:var(--brand-400);border:1px solid rgba(34,211,197,.24)}
.badge-accent{background:rgba(255,138,76,.14);color:var(--accent-400);border:1px solid rgba(255,138,76,.26)}
.badge-neutral{background:rgba(255,255,255,.05);color:var(--t-mid);border:1px solid var(--line)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand-400);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand-500);display:block}

.sec-head{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,3.2vw,32px);max-width:640px}
.sec-sub{color:var(--t-mid);font-size:15px;max-width:460px;line-height:1.8}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,21,.78);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.logo-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 36px;
  background:linear-gradient(140deg,rgba(34,211,197,.95),rgba(34,211,197,.35));
  display:flex;align-items:center;justify-content:center;color:#04211F;font-size:17px;
  box-shadow:0 0 0 1px rgba(34,211,197,.35),0 10px 24px -12px rgba(34,211,197,.8);
}
.logo-text{font-weight:700;font-size:16px;letter-spacing:-.01em;line-height:1.2}
.logo-sub{font-size:11px;color:var(--t-low);letter-spacing:.08em}

.nav-search{
  position:relative;display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;border-radius:999px;
  background:rgba(255,255,255,.04);border:1px solid var(--line-strong);
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.nav-search:focus-within{border-color:var(--brand-400);background:rgba(255,255,255,.06);box-shadow:0 0 0 3px rgba(34,211,197,.14)}
.nav-search i{color:var(--t-low);font-size:14px}
.nav-search input{flex:1;min-width:0;background:transparent;border:0;outline:none;font-size:14px;color:var(--t-hi)}
.nav-search input::placeholder{color:var(--t-low)}
.key-hint{
  font-family:var(--mono);font-size:11px;color:var(--t-low);
  border:1px solid var(--line-strong);border-radius:6px;padding:1px 6px;flex:0 0 auto;
}
.suggest-panel{
  position:absolute;left:0;right:0;top:calc(100% + 10px);border-radius:18px;
  padding:8px;z-index:70;display:none;
  box-shadow:0 24px 60px -24px rgba(0,0,0,.8),0 0 0 1px rgba(34,211,197,.14);
}
.suggest-panel.is-open{display:block}
.suggest-item{
  display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;
  font-size:14px;color:var(--t-mid);transition:background .18s ease,color .18s ease;
}
.suggest-item:hover,.suggest-item:focus-visible{background:rgba(255,255,255,.07);color:var(--t-hi)}
.suggest-item .s-ico{width:30px;height:30px;border-radius:9px;background:rgba(34,211,197,.12);color:var(--brand-400);display:flex;align-items:center;justify-content:center;font-size:12px;flex:0 0 30px}
.suggest-item .s-cat{margin-left:auto;font-size:11px;color:var(--t-low);font-family:var(--mono)}

.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:14px;font-weight:500;color:var(--t-mid);border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--t-hi)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;
  background:var(--brand-500);border-radius:2px;box-shadow:0 0 12px rgba(34,211,197,.8);
}
.burger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--t-hi);
}
.burger:hover{background:rgba(255,255,255,.06)}
.drawer{
  display:none;border-top:1px solid var(--line);padding:16px 0 22px;
}
.drawer.is-open{display:block}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 4px;font-size:15px;color:var(--t-mid);border-bottom:1px solid var(--line);
}
.drawer-link:hover{color:var(--brand-400)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 72px}
@media(min-width:768px){.hero{padding:88px 0 96px}}
@media(min-width:1024px){.hero{padding:104px 0 112px}}
.hero-bg{
  position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.16;
}
.hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 28%,transparent 76%);
  mask-image:radial-gradient(ellipse at 50% 0%,#000 28%,transparent 76%);
}
.hero-glow{
  position:absolute;width:760px;height:760px;left:-180px;top:-300px;pointer-events:none;
  background:radial-gradient(circle,rgba(34,211,197,.22),transparent 62%);
}
.hero-glow-2{
  position:absolute;width:520px;height:520px;right:-160px;bottom:-260px;pointer-events:none;
  background:radial-gradient(circle,rgba(255,138,76,.13),transparent 64%);
}
.hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,21,.84),rgba(7,12,21,.94) 58%,var(--ink-900));
}
.hero h1{font-size:clamp(30px,5vw,52px);letter-spacing:-.02em;line-height:1.16}
.hero-lead{margin-top:20px;font-size:16px;line-height:1.85;color:var(--t-mid);max-width:560px}
.hero-metric{
  border-top:1px solid var(--line);padding-top:12px;margin-top:12px;
  display:flex;align-items:baseline;justify-content:space-between;gap:10px;
}
.hero-metric .v{font-family:var(--mono);font-size:20px;font-weight:700;color:var(--brand-400)}
.hero-metric .k{font-size:12.5px;color:var(--t-low)}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;
  font-size:13px;color:var(--t-mid);background:rgba(255,255,255,.05);border:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.chip:hover{color:var(--brand-400);border-color:rgba(34,211,197,.4);background:rgba(34,211,197,.08)}

/* ---------- 实时状态条 ---------- */
.status-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-800)}
.dot-live{
  width:8px;height:8px;border-radius:999px;background:var(--brand-500);flex:0 0 8px;
  box-shadow:0 0 0 4px rgba(34,211,197,.16);animation:pulse 2.2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.55;transform:scale(.86)}}

/* ---------- 功能 ---------- */
.feature-row{
  display:flex;gap:18px;padding:22px;border-radius:20px;
  background:var(--ink-700);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease,background .25s ease;
}
.feature-row:hover{border-color:rgba(95,240,227,.4);transform:translateY(-2px)}
.feature-ico{
  width:46px;height:46px;flex:0 0 46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  background:rgba(34,211,197,.12);color:var(--brand-400);border:1px solid rgba(34,211,197,.22);
}
.feature-ico.accent{background:rgba(255,138,76,.12);color:var(--accent-400);border-color:rgba(255,138,76,.24)}
.sticky-side{position:sticky;top:108px}

/* ---------- 场景 ---------- */
.scene-btn{
  display:flex;gap:14px;width:100%;text-align:left;padding:16px 18px;border-radius:16px;
  border:1px solid var(--line);background:var(--ink-700);cursor:pointer;
  transition:border-color .22s ease,background .22s ease,transform .22s ease;
}
.scene-btn:hover{border-color:rgba(95,240,227,.35);transform:translateY(-1px)}
.scene-btn.is-active{
  border-color:rgba(34,211,197,.55);
  background:linear-gradient(90deg,rgba(34,211,197,.10),rgba(19,30,46,1) 72%);
}
.scene-idx{font-family:var(--mono);font-size:13px;color:var(--t-low);flex:0 0 auto;padding-top:2px}
.scene-btn.is-active .scene-idx{color:var(--brand-400)}
.scene-panel[hidden]{display:none}

/* ---------- 案例 ---------- */
.case-num{font-family:var(--mono);font-size:32px;font-weight:700;line-height:1;color:var(--brand-400)}
.case-num.accent{color:var(--accent-400)}

/* ---------- 最新信息 ---------- */
.cms-card{
  display:flex;flex-direction:column;gap:12px;padding:22px;border-radius:20px;
  background:var(--ink-700);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.cms-card:hover{border-color:rgba(95,240,227,.4);transform:translateY(-2px)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:20px;padding:36px 24px;text-align:center;
  background:rgba(255,255,255,.02);max-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-icon{
  width:50px;height:50px;border-radius:16px;background:rgba(34,211,197,.10);
  color:var(--brand-400);display:flex;align-items:center;justify-content:center;font-size:19px;
}

/* ---------- 价格 ---------- */
.price-card{
  display:flex;flex-direction:column;padding:28px;border-radius:20px;
  background:var(--ink-700);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.price-card:hover{border-color:rgba(95,240,227,.4);transform:translateY(-2px)}
.price-card.featured{
  background:rgba(255,255,255,.06);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(34,211,197,.42);
  box-shadow:0 0 0 1px rgba(34,211,197,.18),0 14px 44px -14px rgba(34,211,197,.32);
}
.price-value{font-family:var(--mono);font-size:40px;font-weight:700;line-height:1.1;color:var(--t-hi)}
.price-value .unit{font-size:14px;color:var(--t-low);font-weight:500;margin-left:4px}
.price-li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--t-mid);line-height:1.7}
.price-li i{color:var(--brand-400);font-size:13px;margin-top:6px}

/* ---------- FAQ ---------- */
.faq-item{border:1px solid var(--line);border-radius:16px;background:var(--ink-700);overflow:hidden;transition:border-color .22s ease}
.faq-item:hover{border-color:rgba(95,240,227,.3)}
.faq-item.is-open{border-color:rgba(34,211,197,.42)}
.faq-btn{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  padding:18px 20px;font-size:16px;font-weight:600;color:var(--t-hi);
}
.faq-bar{width:3px;height:20px;border-radius:3px;background:var(--line-strong);flex:0 0 3px;transition:background .22s ease}
.faq-item.is-open .faq-bar{background:var(--brand-500);box-shadow:0 0 12px rgba(34,211,197,.7)}
.faq-btn .faq-arrow{margin-left:auto;color:var(--t-low);font-size:13px;transition:transform .22s ease}
.faq-item.is-open .faq-arrow{transform:rotate(180deg);color:var(--brand-400)}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-panel-inner{padding:0 20px 20px 37px;font-size:14.5px;line-height:1.85;color:var(--t-mid)}

/* ---------- CTA ---------- */
.cta-block{
  position:relative;overflow:hidden;border-radius:24px;
  border:1px solid rgba(34,211,197,.24);
  background:linear-gradient(120deg,rgba(34,211,197,.12),rgba(12,20,32,.9) 58%);
  padding:44px 28px;
}
@media(min-width:768px){.cta-block{padding:56px 48px}}
.cta-block::after{
  content:"";position:absolute;width:420px;height:420px;right:-140px;top:-180px;
  background:radial-gradient(circle,rgba(34,211,197,.24),transparent 66%);pointer-events:none;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:56px 0 26px;margin-top:0}
.foot-title{font-size:13px;font-weight:700;color:var(--t-hi);letter-spacing:.06em;margin-bottom:16px}
.foot-link{display:block;font-size:14px;color:var(--t-mid);padding:5px 0;transition:color .2s ease}
.foot-link:hover{color:var(--brand-400)}
.foot-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--t-low)}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;z-index:50;
  background:var(--brand-500);color:#04211F;font-size:15px;
  box-shadow:0 0 0 1px rgba(34,211,197,.4),0 14px 34px -14px rgba(34,211,197,.85);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--brand-400)}

@media (max-width:520px){
  .btn{width:100%}
  .btn-sm{width:auto}
  .hero-metric{flex-direction:column;align-items:flex-start;gap:2px}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink-900:#070C15;
  --ink-800:#0C1420;
  --ink-700:#131E2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand-500:#22D3C5;
  --brand-400:#5FF0E3;
  --brand-700:#0E8F87;
  --accent-500:#FF8A4C;
  --accent-400:#FFB27A;
  --t-hi:#EAF2F8;
  --t-mid:#A7B6C6;
  --t-low:#6B7C8E;
  --paper:#F4F7FA;
  --paper-line:#DCE4EC;
  --r-card:20px;
  --r-img:16px;
  --r-btn:12px;
  --glow:0 0 0 1px rgba(34,211,197,.18), 0 14px 44px -14px rgba(34,211,197,.32);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t-mid);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px}
.mono{font-family:var(--font-mono)}
.container-x{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,21,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:16px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(34,211,197,.24),rgba(34,211,197,.04));
  border:1px solid rgba(34,211,197,.34);color:var(--brand-400);font-size:15px;
}
.logo-text{font-weight:700;color:var(--t-hi);font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.search-zone{position:relative;flex:1;display:flex;justify-content:center;min-width:0}
.search-box{
  display:flex;align-items:center;gap:10px;width:100%;max-width:560px;height:44px;
  padding:0 14px;border-radius:999px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);transition:.2s ease;
}
.search-box i{color:var(--t-low);font-size:14px}
.search-box:focus-within{border-color:var(--brand-400);box-shadow:0 0 0 3px rgba(34,211,197,.14)}
.search-box input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--t-hi);font-size:14px}
.search-box input::placeholder{color:var(--t-low)}
.kbd{
  font-family:var(--font-mono);font-size:11px;color:var(--t-low);
  border:1px solid var(--line-strong);border-radius:6px;padding:1px 6px;line-height:1.6;
}
.search-panel{
  position:absolute;top:52px;left:50%;transform:translateX(-50%) translateY(-6px);
  width:100%;max-width:560px;padding:8px;border-radius:18px;
  background:rgba(12,20,32,.72);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--line-strong);
  box-shadow:0 24px 60px -24px rgba(0,0,0,.75);
  opacity:0;visibility:hidden;transition:.2s ease;z-index:80;
}
.search-panel.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.sug-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:12px;font-size:14px;color:var(--t-mid)}
.sug-item:hover{background:rgba(255,255,255,.06);color:var(--t-hi)}
.sug-item .sug-ico{color:var(--brand-400);width:16px;text-align:center;font-size:13px}
.sug-item .sug-cat{margin-left:auto;font-size:12px;color:var(--t-low)}
.nav-link{
  padding:8px 12px;font-size:14.5px;color:var(--t-mid);border-radius:8px;
  position:relative;white-space:nowrap;transition:.18s ease;
}
.nav-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--brand-400)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand-500);border-radius:2px;
}
.header-cta{height:42px;padding:0 16px;font-size:14px;flex-shrink:0}
.menu-btn{
  display:none;place-items:center;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);background:transparent;color:var(--t-hi);cursor:pointer;
}
.menu-btn:hover{border-color:var(--brand-400);color:var(--brand-400)}
.drawer{display:none;border-top:1px solid var(--line);background:rgba(12,20,32,.96);padding:14px 20px 22px}
.drawer.open{display:block}
.drawer .search-box{margin-bottom:12px}
.drawer-nav{display:grid;gap:6px}
.drawer-nav a{padding:11px 12px;border-radius:12px;font-size:15px;color:var(--t-mid);border:1px solid transparent}
.drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--t-hi);border-color:var(--line)}
.drawer-nav a.active{color:var(--brand-400);background:rgba(34,211,197,.08);border-color:rgba(34,211,197,.28)}

/* ---------- 按钮 / 徽章 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:var(--r-btn);border:0;cursor:pointer;
  background:var(--brand-500);color:#04211F;font-weight:700;font-size:15px;
  transition:.2s ease;white-space:nowrap;
}
.btn-primary:hover{background:var(--brand-400);box-shadow:0 12px 32px -12px rgba(34,211,197,.6);transform:translateY(-1px)}
.btn-primary:active{background:var(--brand-700);color:#EAF2F8;transform:translateY(0)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:var(--r-btn);cursor:pointer;
  background:transparent;border:1px solid var(--line-strong);color:var(--t-hi);
  font-weight:600;font-size:15px;transition:.2s ease;white-space:nowrap;
}
.btn-ghost:hover{background:rgba(255,255,255,.05);border-color:var(--brand-400);color:var(--brand-400);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);background:rgba(255,255,255,.09)}
.btn-text{color:var(--brand-400);font-size:14.5px;font-weight:600;text-decoration:underline;text-underline-offset:4px}
.btn-text:hover{color:var(--brand-500)}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  font-size:12.5px;line-height:1.7;white-space:nowrap;
}
.badge-brand{background:rgba(34,211,197,.12);color:var(--brand-400)}
.badge-accent{background:rgba(255,138,76,.14);color:var(--accent-400)}
.badge-neutral{background:rgba(255,255,255,.06);color:var(--t-mid);border:1px solid var(--line)}

/* ---------- 页头 banner ---------- */
.page-banner{position:relative;overflow:hidden;padding:40px 0 36px;border-bottom:1px solid var(--line)}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.16;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 260px at 12% 0%,rgba(34,211,197,.18),transparent 68%),
             linear-gradient(180deg,rgba(7,12,21,.55),rgba(7,12,21,.94));
}
.page-banner .container-x{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-low)}
.breadcrumb a{color:var(--t-mid)}
.breadcrumb a:hover{color:var(--brand-400)}
.breadcrumb .sep{color:var(--t-low);opacity:.6}

.article-head{margin-top:18px;max-width:900px}
.article-head h1{
  font-size:clamp(30px,4.4vw,48px);line-height:1.24;font-weight:700;
  letter-spacing:-.01em;color:var(--t-hi);margin:14px 0 18px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-family:var(--font-mono);font-size:13px;color:var(--t-low)}
.meta-row .mi{display:inline-flex;align-items:center;gap:6px}
.meta-row .mi i{color:var(--brand-400);font-size:12px}
.meta-row .sep{opacity:.5}

/* ---------- 正文布局 ---------- */
.main-wrap{padding:40px 0 64px}
.layout-grid{display:grid;gap:38px;grid-template-columns:minmax(0,1fr) 306px;align-items:start}
.article-col{min-width:0}
.paper{
  background:var(--paper);color:#1B2733;border:1px solid var(--paper-line);
  border-radius:var(--r-card);padding:36px 38px;
  box-shadow:0 30px 70px -36px rgba(0,0,0,.7);
  max-width:760px;
}
.article-content{font-size:16px}
.article-content p{margin:0 0 1.2em;line-height:1.9;color:#2C3A48}
.article-content h2{
  position:relative;font-size:clamp(22px,2.4vw,28px);font-weight:700;color:#121C26;
  letter-spacing:-.01em;margin:1.8em 0 .8em;padding-left:14px;line-height:1.4;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:3px;
  background:var(--brand-500);border-radius:2px;
}
.article-content h3{font-size:20px;font-weight:700;color:#1B2733;margin:1.5em 0 .6em;line-height:1.5}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding:0;list-style:none}
.article-content li{position:relative;padding-left:20px;margin:.5em 0;line-height:1.85;color:#2C3A48}
.article-content li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;
  background:var(--brand-500);
}
.article-content ol{counter-reset:item}
.article-content blockquote{
  margin:1.5em 0;padding:14px 18px;background:#E9EFF5;border-left:3px solid var(--brand-500);
  border-radius:0 12px 12px 0;color:#3A4A5A;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:var(--r-img);margin:1.6em auto}
.article-content figure{margin:1.6em 0}
.article-content figcaption{font-size:13px;color:#6B7C8E;text-align:center;margin-top:8px}
.article-content code{
  font-family:var(--font-mono);font-size:14px;background:#E3EAF1;
  padding:2px 6px;border-radius:6px;color:#0E5F5A;
}
.article-content pre{
  background:#0C1420;color:#D6E4EF;padding:18px 20px;border-radius:14px;
  overflow-x:auto;margin:1.6em 0;font-size:14px;line-height:1.75;
}
.article-content pre code{background:none;color:inherit;padding:0}
.article-content table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-content th,.article-content td{border:1px solid var(--paper-line);padding:10px 12px;text-align:left}
.article-content th{background:#E7EEF5;color:#1B2733;font-weight:700}
.article-content tbody tr:nth-child(even){background:#EDF3F8}
.article-content a{color:#0E8F87;text-decoration:underline;text-underline-offset:3px}
.article-content a:hover{color:#0A6E68;font-weight:600}
.article-content hr{border:0;border-top:1px solid var(--paper-line);margin:2em 0}

.empty-state{
  max-width:760px;padding:46px 34px;border-radius:var(--r-card);
  background:var(--ink-700);border:1px dashed var(--line-strong);text-align:center;
}
.empty-state i{font-size:28px;color:var(--brand-400)}
.empty-state p{margin:14px 0 18px;color:var(--t-mid)}

/* ---------- 标签行 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;max-width:760px;margin-top:22px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
  font-size:13px;color:var(--t-mid);background:var(--ink-700);border:1px solid var(--line);
  transition:.18s ease;
}
.tag:hover{color:var(--brand-400);border-color:rgba(34,211,197,.42);transform:translateY(-1px)}

/* ---------- 侧栏 ---------- */
.side-col{position:relative}
.toc-card{
  position:sticky;top:96px;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px;
}
.side-title{
  font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--t-low);
  text-transform:uppercase;margin:0 0 12px;font-family:var(--font-mono);
}
.toc-link{
  display:block;font-size:13.5px;color:var(--t-mid);padding:7px 10px;
  border-left:2px solid transparent;border-radius:0 8px 8px 0;line-height:1.6;
}
.toc-link:hover{color:var(--t-hi);background:rgba(255,255,255,.04)}
.toc-link.active{color:var(--brand-400);border-left-color:var(--brand-500);background:rgba(34,211,197,.08)}
.side-links{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.side-link{display:flex;gap:10px;align-items:flex-start;padding:9px 10px;border-radius:12px;font-size:13.5px;color:var(--t-mid);line-height:1.6}
.side-link:hover{background:rgba(255,255,255,.04);color:var(--brand-400)}
.side-link i{color:var(--brand-400);font-size:12px;margin-top:4px}
.mobile-toc{display:none;margin-top:24px;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:16px 18px}

/* ---------- 上下篇 ---------- */
.pager-grid{display:grid;gap:18px;grid-template-columns:repeat(2,minmax(0,1fr));max-width:760px;margin-top:34px}
.pager-card{
  display:block;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 22px;transition:.2s ease;
}
.pager-card:hover{border-color:rgba(34,211,197,.42);transform:translateY(-2px)}
.pager-card .pk{font-family:var(--font-mono);font-size:12px;color:var(--t-low);letter-spacing:.05em}
.pager-card .pt{display:block;margin-top:10px;font-size:16px;font-weight:700;color:var(--t-hi);line-height:1.55}
.pager-card:hover .pt{color:var(--brand-400)}

/* ---------- 相关推荐 ---------- */
.section-block{padding:64px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;color:var(--t-hi);margin:0;letter-spacing:-.01em}
.section-head p{margin:8px 0 0;font-size:14.5px;color:var(--t-mid);max-width:620px}
.card-grid{display:grid;gap:22px;grid-template-columns:repeat(3,minmax(0,1fr))}
.post-card{
  display:flex;flex-direction:column;background:var(--ink-700);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;transition:.22s ease;height:100%;
}
.post-card:hover{border-color:rgba(34,211,197,.42);transform:translateY(-2px);box-shadow:0 18px 40px -26px rgba(34,211,197,.5)}
.post-card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--ink-800)}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-body h3{margin:0;font-size:17px;font-weight:700;color:var(--t-hi);line-height:1.55}
.post-card:hover h3{color:var(--brand-400)}
.post-body p{margin:0;font-size:14px;line-height:1.75;color:var(--t-mid);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-family:var(--font-mono);font-size:12.5px;color:var(--t-low)}

/* ---------- CTA ---------- */
.cta-band{position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-800)}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 220px at 82% 50%,rgba(255,138,76,.16),transparent 70%),
             radial-gradient(560px 220px at 10% 20%,rgba(34,211,197,.16),transparent 70%);
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding:52px 0}
.cta-inner h2{margin:0;font-size:clamp(22px,2.8vw,32px);font-weight:700;color:var(--t-hi);letter-spacing:-.01em}
.cta-inner p{margin:10px 0 0;font-size:15px;color:var(--t-mid);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;border:1px solid rgba(34,211,197,.35);cursor:pointer;
  background:rgba(19,30,46,.92);color:var(--brand-400);opacity:0;visibility:hidden;
  transition:.25s ease;z-index:70;
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{box-shadow:var(--glow);transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:56px 0 22px;margin-top:0}
.foot-title{font-size:14px;font-weight:700;color:var(--t-hi);margin:0 0 14px;letter-spacing:.02em}
.foot-link{display:block;font-size:14px;color:var(--t-mid);padding:5px 0}
.foot-link:hover{color:var(--brand-400)}
.foot-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--t-low);font-family:var(--font-mono);
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .layout-grid{grid-template-columns:minmax(0,1fr) 280px;gap:30px}
}
@media (max-width:1024px){
  .layout-grid{grid-template-columns:minmax(0,1fr)}
  .side-col{display:none}
  .mobile-toc{display:block}
  .header-inner{height:auto;padding:12px 0;flex-wrap:wrap;row-gap:12px}
  .search-zone{order:3;width:100%;flex-basis:100%}
  .search-box{max-width:none}
  .menu-btn{display:inline-grid;margin-left:auto}
  .nav-link{padding:8px 10px;font-size:14px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .paper{padding:26px 20px;border-radius:16px}
  .article-head h1{font-size:clamp(24px,6.4vw,34px)}
  .pager-grid{grid-template-columns:minmax(0,1fr)}
  .cta-inner{padding:42px 0}
  .section-block{padding:48px 0}
  .main-wrap{padding:28px 0 48px}
}
@media (max-width:520px){
  .container-x{padding:0 16px}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .logo-text{font-size:15px}
  .btn-primary,.btn-ghost{width:100%}
  .cta-actions{width:100%}
  .search-panel{left:0;transform:translateY(-6px)}
  .search-panel.show{transform:translateY(0)}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .btn-primary:hover,.btn-ghost:hover,.post-card:hover,.pager-card:hover,.tag:hover,.to-top:hover{transform:none;box-shadow:none}
}

/* roulang page: category1 */
:root{
    --ink-900:#070C15;
    --ink-800:#0C1420;
    --ink-700:#131E2E;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --brand-500:#22D3C5;
    --brand-400:#5FF0E3;
    --brand-700:#0E8F87;
    --accent-500:#FF8A4C;
    --accent-400:#FFB27A;
    --t-hi:#EAF2F8;
    --t-mid:#A7B6C6;
    --t-low:#6B7C8E;
    --paper:#F4F7FA;
    --paper-line:#DCE4EC;
    --glow:0 0 0 1px rgba(34,211,197,.18), 0 14px 44px -14px rgba(34,211,197,.32);
    --radius-card:20px;
    --radius-img:16px;
    --radius-btn:12px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--ink-900);
    color:var(--t-hi);
    font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.7;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  button{background:none;border:0;cursor:pointer}
  h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  :focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:8px}
  ::selection{background:rgba(34,211,197,.28)}

  .mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
  .container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  .container-wide{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

  /* ---------- 导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(9,15,26,.78);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{display:flex;align-items:center;gap:16px;min-height:68px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;order:1}
  .logo-mark{
    width:36px;height:36px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(150deg,rgba(34,211,197,.24),rgba(34,211,197,.06));
    border:1px solid rgba(34,211,197,.4);color:var(--brand-400);font-size:15px;
    box-shadow:0 0 18px -6px rgba(34,211,197,.55);
  }
  .logo-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}

  .nav-search{position:relative;order:3;flex:1 1 100%;min-width:0}
  .search-box{
    display:flex;align-items:center;gap:10px;height:46px;padding:0 14px;
    background:rgba(255,255,255,.045);
    border:1px solid var(--line-strong);
    border-radius:999px;
    transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
  }
  .search-box i.fa-magnifying-glass{color:var(--t-low);font-size:14px}
  .search-box input{
    flex:1 1 auto;min-width:0;background:transparent;border:0;outline:none;font-size:14.5px;color:var(--t-hi);
  }
  .search-box input::placeholder{color:var(--t-low)}
  .search-box:focus-within{
    border-color:var(--brand-400);
    background:rgba(255,255,255,.07);
    box-shadow:0 0 0 4px rgba(34,211,197,.14), 0 0 24px -6px rgba(34,211,197,.5);
  }
  .key-badge{
    flex:0 0 auto;min-width:22px;height:22px;padding:0 6px;border-radius:6px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:11px;color:var(--t-mid);border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
    font-family:"JetBrains Mono",ui-monospace,monospace;
  }
  .suggest-panel{
    position:absolute;top:calc(100% + 10px);left:0;right:0;z-index:70;
    padding:8px;border-radius:18px;
    background:rgba(18,28,44,.72);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border:1px solid rgba(255,255,255,.12);
    box-shadow:0 24px 60px -24px rgba(0,0,0,.85);
    opacity:0;visibility:hidden;transform:translateY(-6px);
    transition:opacity .18s ease, transform .18s ease, visibility .18s ease;
  }
  .suggest-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
  .suggest-item{
    display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;
    font-size:14px;color:var(--t-mid);transition:background .16s ease,color .16s ease;
  }
  .suggest-item:hover{background:rgba(255,255,255,.07);color:var(--t-hi)}
  .suggest-item .s-ico{width:22px;text-align:center;color:var(--brand-400);font-size:13px}
  .suggest-item .s-cat{margin-left:auto;font-size:12px;color:var(--t-low)}

  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
    font-size:14px;color:var(--t-mid);border-radius:10px;
    transition:color .18s ease, background .18s ease;
  }
  .nav-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
  .nav-link.active{color:var(--brand-400)}
  .nav-link.active::after{
    content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;background:var(--brand-400);
  }

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 20px;border-radius:var(--radius-btn);
    font-size:14.5px;font-weight:600;white-space:nowrap;
    transition:background .18s ease, color .18s ease, transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  }
  .btn-primary{
    background:var(--brand-500);color:#04211F;border:1px solid var(--brand-500);
  }
  .btn-primary:hover{background:var(--brand-400);border-color:var(--brand-400);transform:translateY(-1px);box-shadow:0 10px 30px -10px rgba(34,211,197,.7)}
  .btn-primary:active{background:var(--brand-700);border-color:var(--brand-700);transform:translateY(0);box-shadow:none}
  .btn-ghost{
    background:transparent;color:var(--t-hi);border:1px solid var(--line-strong);
  }
  .btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(34,211,197,.5);transform:translateY(-1px)}
  .btn-ghost:active{background:rgba(255,255,255,.02);transform:translateY(0)}
  .btn-sm{min-height:38px;padding:0 16px;font-size:13.5px}
  .header-cta{order:2;margin-left:auto}
  .menu-btn{
    order:2;margin-left:auto;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line-strong);color:var(--t-hi);display:inline-flex;align-items:center;justify-content:center;
    transition:background .18s ease,border-color .18s ease;
  }
  .menu-btn:hover{background:rgba(255,255,255,.06);border-color:rgba(34,211,197,.5)}

  .mobile-drawer{
    display:none;border-top:1px solid var(--line);background:var(--ink-800);
    padding:14px 20px 20px;
  }
  .mobile-drawer.open{display:block}
  .drawer-link{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    min-height:48px;padding:0 14px;border-radius:12px;font-size:15px;color:var(--t-mid);
    border:1px solid transparent;transition:background .16s ease,color .16s ease,border-color .16s ease;
  }
  .drawer-link:hover{background:rgba(255,255,255,.05);color:var(--t-hi);border-color:var(--line)}
  .drawer-link.active{color:var(--brand-400);border-color:rgba(34,211,197,.4);background:rgba(34,211,197,.07)}

  /* ---------- 通用组件 ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.6;
  }
  .badge-brand{background:rgba(34,211,197,.12);color:var(--brand-400);border:1px solid rgba(34,211,197,.28)}
  .badge-accent{background:rgba(255,138,76,.13);color:var(--accent-400);border:1px solid rgba(255,138,76,.28)}
  .badge-neutral{background:rgba(255,255,255,.05);color:var(--t-mid);border:1px solid var(--line-strong)}

  .chip{
    display:inline-flex;align-items:center;gap:8px;min-height:38px;padding:0 16px;
    border-radius:999px;font-size:13.5px;color:var(--t-mid);
    border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
    transition:color .16s ease,border-color .16s ease,background .16s ease,transform .16s ease;
  }
  .chip:hover{color:var(--brand-400);border-color:rgba(34,211,197,.5);background:rgba(34,211,197,.07);transform:translateY(-1px)}
  .chip.active{color:#04211F;background:var(--brand-500);border-color:var(--brand-500)}
  .chip.active:hover{background:var(--brand-400);border-color:var(--brand-400)}

  .card{
    background:var(--ink-700);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
  }
  .card:hover{
    border-color:rgba(34,211,197,.42);
    transform:translateY(-2px);
    box-shadow:var(--glow);
  }
  .glass{
    background:rgba(255,255,255,.06);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid rgba(255,255,255,.12);
    border-radius:var(--radius-card);
  }

  .section{padding:64px 0}
  @media (min-width:768px){.section{padding:88px 0}}
  @media (min-width:1024px){.section{padding:104px 0}}

  .sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:32px}
  .sec-title{font-size:clamp(24px,3vw,32px)}
  .sec-sub{margin-top:10px;font-size:15px;color:var(--t-mid);max-width:640px;line-height:1.85}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
    text-transform:uppercase;color:var(--brand-400);font-weight:600;margin-bottom:12px;
  }
  .eyebrow::before{content:"";width:20px;height:1px;background:var(--brand-400)}

  .link-arrow{
    display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand-400);
    text-underline-offset:5px;transition:color .16s ease,gap .16s ease;
  }
  .link-arrow:hover{color:var(--brand-400);text-decoration:underline;gap:12px}
  .link-arrow:active{color:var(--brand-700)}

  /* ---------- 分类 Hero ---------- */
  .cat-hero{
    position:relative;overflow:hidden;background:var(--ink-800);
    border-bottom:1px solid var(--line);
    padding:56px 0 52px;
  }
  .cat-hero::before{
    content:"";position:absolute;inset:0;
    background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity:.16;
  }
  .cat-hero::after{
    content:"";position:absolute;inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px),
      radial-gradient(620px 320px at 12% 0%, rgba(34,211,197,.18), transparent 66%),
      linear-gradient(180deg, rgba(7,12,21,.72), rgba(7,12,21,.94));
    background-size:46px 46px, 46px 46px, auto, auto;
    background-position:center, center, center, center;
  }
  .cat-hero > .container-wide{position:relative;z-index:2}
  .hero-grid{display:grid;gap:34px;align-items:start}
  @media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,1fr) 380px;gap:48px;align-items:center}}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-low);margin-bottom:20px;flex-wrap:wrap}
  .breadcrumb a{color:var(--t-mid);transition:color .16s ease}
  .breadcrumb a:hover{color:var(--brand-400)}
  .breadcrumb .sep{color:var(--t-low);opacity:.6}
  .cat-hero h1{
    font-size:clamp(30px,5vw,50px);
    line-height:1.22;
    max-width:18em;
  }
  .cat-hero h1 .hl{
    color:var(--brand-400);
    position:relative;
  }
  .hero-lede{margin-top:20px;font-size:16.5px;line-height:1.9;color:var(--t-mid);max-width:620px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

  .metric-card{padding:24px}
  .metric-card h2{font-size:15px;color:var(--t-hi);font-weight:600;letter-spacing:0}
  .metric-list{margin-top:18px;display:grid;gap:16px}
  .metric-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding-bottom:14px;border-bottom:1px dashed rgba(255,255,255,.1)}
  .metric-row:last-child{border-bottom:0;padding-bottom:0}
  .metric-num{font-size:24px;font-weight:700;color:var(--brand-400);letter-spacing:-.02em}
  .metric-label{font-size:13.5px;color:var(--t-mid)}
  .metric-foot{margin-top:16px;font-size:12.5px;color:var(--t-low);line-height:1.8}

  /* ---------- 条目流 ---------- */
  .entry-stream{display:grid;gap:22px}
  .entry-row{
    display:grid;gap:22px;align-items:center;
    padding:22px;border-radius:var(--radius-card);
    background:var(--ink-700);border:1px solid var(--line);
    transition:border-color .22s ease, box-shadow .22s ease, transform .22s ease;
  }
  .entry-row:hover{border-color:rgba(34,211,197,.5);box-shadow:var(--glow);transform:translateY(-2px)}
  .entry-media{position:relative;overflow:hidden;border-radius:var(--radius-img);background:var(--ink-800)}
  .entry-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s ease}
  .entry-row:hover .entry-media img{transform:scale(1.04)}
  .entry-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(7,12,21,.05),rgba(7,12,21,.42));
  }
  .entry-body{min-width:0}
  .entry-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
  .entry-index{font-size:12.5px;color:var(--t-low)}
  .entry-body h3{font-size:20px;margin-top:12px}
  .entry-body > p{margin-top:12px;font-size:14.8px;line-height:1.85;color:var(--t-mid)}
  .entry-points{margin-top:16px;display:grid;gap:9px}
  .entry-points li{position:relative;padding-left:20px;font-size:13.8px;color:var(--t-mid);line-height:1.75}
  .entry-points li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
    background:rgba(34,211,197,.85);box-shadow:0 0 10px -2px rgba(34,211,197,.9);
  }
  .entry-foot{margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
  .entry-stamp{font-size:12.5px;color:var(--t-low)}
  @media (min-width:1024px){
    .entry-row{grid-template-columns:minmax(0,40%) minmax(0,1fr);gap:30px;padding:24px;min-height:190px}
    .entry-row.reverse{grid-template-columns:minmax(0,1fr) minmax(0,40%)}
    .entry-row.reverse .entry-media{order:2}
    .entry-row.reverse .entry-body{order:1}
  }

  /* ---------- 指标条 ---------- */
  .stat-strip{
    display:grid;gap:1px;background:var(--line);
    border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  }
  .stat-cell{background:var(--ink-800);padding:26px 22px}
  .stat-cell .val{font-size:30px;font-weight:700;color:var(--brand-400);letter-spacing:-.02em;line-height:1.2}
  .stat-cell .lab{margin-top:8px;font-size:13.5px;color:var(--t-mid)}
  .stat-cell .sub{margin-top:4px;font-size:12.5px;color:var(--t-low)}
  @media (min-width:640px){.stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.stat-strip{grid-template-columns:repeat(4,minmax(0,1fr))}}

  /* ---------- 流程 ---------- */
  .flow-grid{display:grid;gap:18px}
  @media (min-width:768px){.flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.flow-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .flow-item{padding:24px;position:relative}
  .flow-step{font-size:12.5px;color:var(--brand-400);letter-spacing:.1em}
  .flow-item h3{margin-top:14px;font-size:17px}
  .flow-item p{margin-top:10px;font-size:14px;color:var(--t-mid);line-height:1.8}

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:860px;margin:0 auto}
  .faq-item{
    border:1px solid var(--line);border-left:3px solid transparent;border-radius:14px;
    background:var(--ink-700);margin-bottom:12px;overflow:hidden;
    transition:border-color .22s ease, background .22s ease;
  }
  .faq-item.open{border-left-color:var(--brand-500);background:var(--ink-800)}
  .faq-item:hover{border-color:rgba(34,211,197,.36);border-left-color:rgba(34,211,197,.7)}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--t-hi);
  }
  .faq-q i{color:var(--brand-400);font-size:13px;transition:transform .22s ease}
  .faq-item.open .faq-q i{transform:rotate(180deg)}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
  .faq-item.open .faq-a{max-height:360px}
  .faq-a p{padding:0 20px 20px;font-size:14.5px;line-height:1.9;color:var(--t-mid)}

  /* ---------- CTA ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:24px;
    border:1px solid rgba(34,211,197,.3);
    padding:44px 28px;
    background:var(--ink-800);
  }
  .cta-band::before{
    content:"";position:absolute;inset:0;
    background:radial-gradient(560px 260px at 80% 10%, rgba(34,211,197,.2), transparent 68%),
               radial-gradient(420px 240px at 8% 100%, rgba(255,138,76,.12), transparent 70%);
  }
  .cta-band > *{position:relative;z-index:2}
  .cta-band h2{font-size:clamp(23px,3vw,30px)}
  .cta-band p{margin-top:14px;font-size:15px;color:var(--t-mid);line-height:1.9;max-width:620px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

  /* ---------- 相关分类 ---------- */
  .rel-grid{display:grid;gap:18px}
  @media (min-width:640px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.rel-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .rel-card{display:block;padding:24px}
  .rel-card h3{font-size:17px}
  .rel-card p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--t-mid)}
  .rel-card .rel-go{margin-top:18px;display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--brand-400);font-weight:600}

  /* ---------- 页脚 ---------- */
  .site-footer{
    margin-top:24px;
    border-top:1px solid var(--line);
    background:var(--ink-800);
    padding:56px 0 24px;
  }
  .foot-title{font-size:14px;color:var(--t-hi);margin-bottom:16px;font-weight:600}
  .foot-link{display:block;font-size:14px;color:var(--t-mid);padding:7px 0;transition:color .16s ease,transform .16s ease}
  .foot-link:hover{color:var(--brand-400);transform:translateX(3px)}
  .foot-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
    font-size:13px;color:var(--t-low);
  }

  /* ---------- 返回顶部 ---------- */
  .to-top{
    position:fixed;right:20px;bottom:24px;z-index:80;
    width:46px;height:46px;border-radius:999px;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand-500);color:#04211F;
    box-shadow:0 0 0 1px rgba(34,211,197,.4), 0 12px 34px -12px rgba(34,211,197,.9);
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .24s ease, transform .24s ease, visibility .24s ease, background .18s ease;
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
  .to-top:hover{background:var(--brand-400)}
  .to-top:active{background:var(--brand-700)}

  @media (max-width:1023px){
    .header-inner{gap:12px}
    .brand{order:1}
    .menu-btn{order:2}
    .header-cta{display:none}
    .nav-search{order:3;flex:1 1 100%}
  }
  @media (min-width:1024px){
    .nav-search{flex:1 1 auto;order:2;max-width:620px}
    .menu-btn{display:none}
    .header-cta{order:4;margin-left:0}
    .site-header .nav-search{min-width:420px}
  }
  @media (min-width:1280px){
    .site-header .nav-search{min-width:560px}
  }
  @media (max-width:480px){
    .cat-hero{padding:40px 0 38px}
    .entry-row{padding:18px}
    .stat-cell{padding:22px 18px}
  }

  @media (prefers-reduced-motion: reduce){
    *{animation:none !important;transition:none !important}
    html{scroll-behavior:auto}
    .entry-row:hover,.card:hover{transform:none;box-shadow:none}
  }

/* roulang page: category2 */
:root{
  --ink-900:#070C15;
  --ink-800:#0C1420;
  --ink-700:#131E2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand-500:#22D3C5;
  --brand-400:#5FF0E3;
  --brand-700:#0E8F87;
  --accent-500:#FF8A4C;
  --accent-400:#FFB27A;
  --t-hi:#EAF2F8;
  --t-mid:#A7B6C6;
  --t-low:#6B7C8E;
  --paper:#F4F7FA;
  --paper-line:#DCE4EC;
  --r-card:20px;
  --r-img:16px;
  --r-btn:12px;
  --glow:0 0 0 1px rgba(34,211,197,.18), 0 14px 44px -14px rgba(34,211,197,.32);
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t-hi);
  font-family:"HarmonyOS Sans SC","PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s,border-color .2s,background-color .2s,transform .2s}
button,input{font:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,p{margin:0}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.container-wide{max-width:1240px}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand-500);color:#05211F;padding:10px 16px;border-radius:8px;z-index:200}
.skip:focus{left:12px;top:12px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(9,14,24,.74);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;padding:6px 4px;border-radius:12px}
.logo-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(140deg,#22D3C5,#0E8F87);color:#04201E;font-size:15px}
.logo-text{font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--t-hi);white-space:nowrap}
.brand:hover .logo-text{color:var(--brand-400)}
.nav-link{position:relative;padding:8px 12px;border-radius:10px;font-size:14.5px;color:var(--t-mid);white-space:nowrap}
.nav-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--t-hi)}
.nav-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;background:var(--brand-500)}
.menu-btn{width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--t-hi);cursor:pointer;display:grid;place-items:center;transition:.2s}
.menu-btn:hover{background:rgba(255,255,255,.09);border-color:rgba(95,240,227,.45)}

/* ---------- search ---------- */
.search-shell{position:relative;width:100%}
.search-box{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.05);border:1px solid var(--line-strong);border-radius:999px;padding:0 14px;height:44px;transition:border-color .2s,box-shadow .2s,background-color .2s}
.search-box:hover{background:rgba(255,255,255,.07)}
.search-box:focus-within{border-color:var(--brand-400);box-shadow:0 0 0 3px rgba(34,211,197,.14)}
.search-box input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:var(--t-hi);font-size:14.5px}
.search-box input::placeholder{color:var(--t-low)}
.kbd{font-family:var(--mono);font-size:12px;color:var(--t-low);border:1px solid var(--line-strong);border-radius:6px;padding:1px 7px;line-height:1.6}
.search-panel{position:absolute;left:0;right:0;top:calc(100% + 10px);padding:8px;border-radius:16px;background:rgba(12,20,32,.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--line);box-shadow:var(--glow);display:none;z-index:70}
.search-panel.open{display:block}
.sug{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;color:var(--t-mid);font-size:14px;min-height:44px}
.sug i{width:18px;text-align:center;color:var(--brand-400);font-size:13px}
.sug span{flex:1}
.sug small{color:var(--t-low);font-size:12px;font-family:var(--mono)}
.sug:hover,.sug:focus-visible{background:rgba(255,255,255,.07);color:var(--t-hi)}

/* ---------- drawer ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(2,5,10,.6);opacity:0;pointer-events:none;transition:opacity .28s;z-index:80}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);background:rgba(9,14,24,.98);backdrop-filter:blur(16px);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .28s;z-index:90;padding:20px;overflow-y:auto}
.drawer.open{transform:none}
.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:0 14px;border-radius:12px;border:1px solid var(--line);background:var(--ink-700);color:var(--t-mid);font-size:15px;margin-bottom:10px}
.drawer-link:hover{color:var(--t-hi);border-color:rgba(95,240,227,.45)}
.drawer-link.active{color:var(--t-hi);border-color:rgba(95,240,227,.5);background:rgba(34,211,197,.1)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:var(--r-btn);font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s,background-color .18s,box-shadow .18s,color .18s,border-color .18s}
.btn-primary{background:var(--brand-500);color:#05211F}
.btn-primary:hover{background:var(--brand-400);box-shadow:0 12px 32px -10px rgba(34,211,197,.6);transform:translateY(-1px)}
.btn-primary:active{background:var(--brand-700);transform:translateY(0);box-shadow:none}
.btn-ghost{border-color:var(--line-strong);color:var(--t-hi);background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(95,240,227,.5);transform:translateY(-1px)}
.btn-ghost:active{background:rgba(255,255,255,.12);transform:translateY(0)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand-400);font-weight:600;font-size:14px;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;background:none;border:0;padding:2px 0;cursor:pointer;min-height:auto}
.btn-text:hover{color:var(--brand-500);text-decoration-thickness:2px}
.btn-sm{min-height:38px;padding:0 15px;font-size:13.5px}

/* ---------- badges / chips ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:4px 11px;font-size:13px;line-height:1.6}
.badge-brand{background:rgba(34,211,197,.12);color:var(--brand-400);border:1px solid rgba(34,211,197,.24)}
.badge-accent{background:rgba(255,138,76,.12);color:var(--accent-400);border:1px solid rgba(255,138,76,.24)}
.badge-neutral{background:rgba(255,255,255,.05);color:var(--t-mid);border:1px solid var(--line)}
.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:999px;border:1px solid var(--line-strong);background:rgba(255,255,255,.04);font-size:13.5px;color:var(--t-mid);transition:.2s}
.chip:hover{border-color:rgba(95,240,227,.45);color:var(--t-hi);background:rgba(255,255,255,.08)}
.live-dot{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--brand-400)}
.live-dot i{width:7px;height:7px;border-radius:50%;background:var(--brand-500);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,211,197,.55)}70%{box-shadow:0 0 0 9px rgba(34,211,197,0)}100%{box-shadow:0 0 0 0 rgba(34,211,197,0)}}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:26px 0 64px;background:var(--ink-900)}
.hero::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.16;pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(70% 62% at 42% 26%,#000,transparent 78%);
  mask-image:radial-gradient(70% 62% at 42% 26%,#000,transparent 78%);}
.hero-glow{position:absolute;left:-120px;top:-80px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(34,211,197,.22),transparent 66%);pointer-events:none;z-index:1}
.hero > .container-x{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-low);flex-wrap:wrap}
.crumb a{color:var(--t-mid)}
.crumb a:hover{color:var(--brand-400)}
.crumb .sep{opacity:.5}
.crumb .cur{color:var(--t-hi)}
.h1{font-size:clamp(30px,5vw,52px);line-height:1.2;font-weight:700;letter-spacing:-.01em}
.h2{font-size:clamp(24px,3.2vw,34px);line-height:1.32;font-weight:700;letter-spacing:-.01em}
.h3{font-size:20px;line-height:1.5;font-weight:600;letter-spacing:-.005em}
.lede{font-size:16.5px;line-height:1.85;color:var(--t-mid)}
.glass{background:rgba(255,255,255,.06);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-card);box-shadow:var(--glow)}
.hero-card{padding:22px}
.row-line{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.07);font-size:14px;color:var(--t-mid)}
.row-line:last-child{border-bottom:0}
.row-line b{font-weight:600;color:var(--t-hi)}
.metric{background:var(--ink-800);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.metric-v{display:block;font-size:23px;font-weight:600;color:var(--brand-400);line-height:1.2}
.metric-l{display:block;font-size:13px;color:var(--t-low);margin-top:5px}

/* ---------- sections ---------- */
.section{padding:64px 0}
.section.alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (min-width:768px){.section{padding:92px 0}}
@media (min-width:1024px){.section{padding:110px 0}}
.sec-head{max-width:700px}
.sec-sub{margin-top:14px;color:var(--t-mid);font-size:15.5px;line-height:1.85}

/* ---------- cards ---------- */
.card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .22s,transform .22s,box-shadow .22s;height:100%;display:flex;flex-direction:column}
.card:hover{border-color:rgba(95,240,227,.42);transform:translateY(-2px);box-shadow:0 20px 44px -24px rgba(34,211,197,.42)}
.ratio-16x9{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-800)}
.ratio-16x9 img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .ratio-16x9 img{transform:scale(1.04)}
.ratio-16x9.rounded{border-radius:var(--r-img)}
.card-p{font-size:14.5px;line-height:1.8;color:var(--t-mid);margin-top:10px}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:16px;font-size:13px;color:var(--t-low)}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}

/* ---------- scenes ---------- */
.scene-tab{display:block;width:100%;text-align:left;padding:15px 18px;border-radius:16px;border:1px solid var(--line);background:var(--ink-700);color:var(--t-mid);cursor:pointer;transition:.2s;min-height:44px}
.scene-tab + .scene-tab{margin-top:12px}
.scene-tab span{display:block;font-size:13px;color:var(--t-low);margin-top:4px}
.scene-tab:hover{border-color:rgba(95,240,227,.35);color:var(--t-hi)}
.scene-tab.active{border-color:rgba(95,240,227,.5);background:rgba(34,211,197,.08);color:var(--t-hi)}
.scene-tab.active span{color:var(--brand-400)}
.scene-pane{display:none}
.scene-pane.active{display:block}
.point-list{display:grid;gap:13px}
.point-list li{position:relative;padding-left:26px;color:var(--t-mid);font-size:15px;line-height:1.8}
.point-list li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 3px rgba(34,211,197,.16)}
.point-list li strong{color:var(--t-hi);font-weight:600}

/* ---------- steps ---------- */
.steps{display:grid;gap:20px}
@media (min-width:768px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps li{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:24px 22px;transition:border-color .22s,transform .22s}
.steps li:hover{border-color:rgba(95,240,227,.4);transform:translateY(-2px)}
.step-n{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:rgba(34,211,197,.12);color:var(--brand-400);font-size:14px;font-weight:600;margin-bottom:16px;border:1px solid rgba(34,211,197,.22)}

/* ---------- proof ---------- */
.proof-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;height:100%}
.proof-card.big{background:linear-gradient(180deg,rgba(34,211,197,.08),rgba(34,211,197,0) 62%),var(--ink-700);border-color:rgba(34,211,197,.24)}
.quote{font-size:15.5px;line-height:1.9;color:var(--t-hi)}
.stat-row{display:grid;gap:16px;grid-template-columns:repeat(2,1fr)}
@media (min-width:768px){.stat-row{grid-template-columns:repeat(4,1fr)}}
.stat{background:var(--ink-900);border:1px solid var(--line);border-radius:16px;padding:18px}
.stat .mono{display:block;font-size:26px;color:var(--brand-400);font-weight:600;line-height:1.2}
.stat small{display:block;margin-top:6px;font-size:13px;color:var(--t-low)}

/* ---------- faq ---------- */
.faq-item{border:1px solid var(--line);border-radius:16px;background:var(--ink-700);overflow:hidden;transition:border-color .22s}
.faq-item + .faq-item{margin-top:12px}
.faq-item:hover{border-color:rgba(95,240,227,.3)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;color:var(--t-hi);text-align:left;cursor:pointer;font-size:17px;font-weight:600;min-height:44px;line-height:1.5}
.faq-ico{flex-shrink:0;color:var(--brand-400);font-size:15px;transition:transform .22s,color .22s}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;border-left:3px solid transparent}
.faq-item.open .faq-a{max-height:460px;border-left-color:var(--brand-500)}
.faq-item.open .faq-ico{transform:rotate(45deg)}
.faq-a-inner{padding:0 20px 20px;color:var(--t-mid);font-size:15px;line-height:1.85}

/* ---------- cta ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--ink-800);border:1px solid var(--line);border-radius:26px;padding:44px 28px;text-align:center}
.cta-band::before{content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.12;pointer-events:none}
.cta-band > *{position:relative;z-index:2}
.rel-card{display:block;background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;transition:.22s;height:100%}
.rel-card:hover{border-color:rgba(95,240,227,.45);transform:translateY(-2px)}
.rel-card.cur{border-color:rgba(34,211,197,.4);background:rgba(34,211,197,.06)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:56px 0 24px}
.foot-title{font-size:15px;font-weight:600;color:var(--t-hi);margin-bottom:14px}
.foot-link{display:block;font-size:14px;color:var(--t-mid);padding:6px 0}
.foot-link:hover{color:var(--brand-400)}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--t-low)}

/* ---------- to top ---------- */
#toTop{position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--brand-500);color:#05211F;display:grid;place-items:center;border:0;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .25s,transform .25s,background-color .2s;box-shadow:0 12px 28px -12px rgba(34,211,197,.8);z-index:70}
#toTop.show{opacity:1;pointer-events:auto;transform:none}
#toTop:hover{background:var(--brand-400)}

@media (max-width:520px){
  .logo-text{font-size:15px}
  .hero{padding-bottom:48px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .card:hover,.steps li:hover,.rel-card:hover{transform:none}
}

/* roulang page: category3 */
:root{
  --ink-900:#070C15;
  --ink-800:#0C1420;
  --ink-700:#131E2E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand-500:#22D3C5;
  --brand-400:#5FF0E3;
  --brand-700:#0E8F87;
  --accent-500:#FF8A4C;
  --accent-400:#FFB27A;
  --t-hi:#EAF2F8;
  --t-mid:#A7B6C6;
  --t-low:#6B7C8E;
  --paper:#F4F7FA;
  --paper-line:#DCE4EC;
  --r-card:20px;
  --r-img:16px;
  --r-btn:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t-hi);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:none;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.28;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:8px}
.mono{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
.container-x{width:100%;max-width:1240px;margin:0 auto;padding:0 22px}
@media(max-width:640px){.container-x{padding:0 16px}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,21,.78);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(145deg,var(--brand-500),var(--brand-700));
  color:#04140F;font-size:15px;
  box-shadow:0 0 0 1px rgba(34,211,197,.25),0 10px 26px -12px rgba(34,211,197,.6);
}
.logo-text{font-size:16px;font-weight:700;white-space:nowrap;letter-spacing:-.02em}

.search-form{position:relative;flex:1;min-width:0;max-width:660px}
@media(min-width:1024px){.search-form{min-width:420px}}
@media(min-width:1280px){.search-form{min-width:520px}}
.search-input{
  width:100%;height:44px;border-radius:999px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line-strong);
  padding:0 58px 0 44px;font-size:15px;color:var(--t-hi);
  transition:border-color .2s ease,box-shadow .25s ease,background .2s ease;
}
.search-input::placeholder{color:var(--t-low)}
.search-input:focus{
  outline:none;
  border-color:var(--brand-400);
  background:rgba(255,255,255,.07);
  box-shadow:0 0 0 3px rgba(34,211,197,.16),0 0 24px -6px rgba(34,211,197,.4);
}
.search-icon{position:absolute;left:17px;top:50%;transform:translateY(-50%);color:var(--t-low);font-size:14px;pointer-events:none}
.search-kbd{
  position:absolute;right:14px;top:50%;transform:translateY(-50%);
  font-size:12px;color:var(--t-low);border:1px solid var(--line-strong);
  border-radius:6px;padding:2px 7px;line-height:1.4;
}
.suggest-panel{
  position:absolute;left:0;right:0;top:calc(100% + 10px);
  background:rgba(19,30,46,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  border-radius:16px;
  padding:8px;
  box-shadow:0 0 0 1px rgba(34,211,197,.14),0 22px 60px -22px rgba(34,211,197,.45);
  display:none;
  z-index:70;
}
.suggest-panel.show{display:block}
.suggest-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;transition:background .18s ease}
.suggest-item:hover{background:rgba(255,255,255,.06)}
.suggest-item i{color:var(--brand-400);width:16px;font-size:13px}
.suggest-item .s-txt{font-size:14.5px;color:var(--t-hi)}
.suggest-item .s-cat{font-size:12px;color:var(--t-low);margin-left:auto}

.nav-link{
  display:inline-flex;align-items:center;height:38px;padding:0 12px;
  border-radius:10px;font-size:14.5px;color:var(--t-mid);
  position:relative;transition:color .2s ease,background .2s ease;white-space:nowrap;
}
.nav-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--brand-400)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand-500);
}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:var(--brand-500);color:#04140F;
  box-shadow:0 0 0 1px rgba(34,211,197,.25),0 14px 34px -16px rgba(34,211,197,.8);
}
.btn-primary:hover{
  background:var(--brand-400);transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(95,240,227,.5),0 18px 44px -14px rgba(34,211,197,.9);
}
.btn-primary:active{background:var(--brand-700);transform:translateY(0);box-shadow:none}
.btn-ghost{border:1px solid var(--line-strong);color:var(--t-hi)}
.btn-ghost:hover{background:rgba(255,255,255,.05);border-color:rgba(95,240,227,.45)}
.btn-ghost:active{background:rgba(255,255,255,.02)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;height:auto;padding:0;
  color:var(--brand-400);font-weight:600;font-size:14.5px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
  text-decoration-color:rgba(95,240,227,.45);
  transition:color .2s ease,text-decoration-color .2s ease;
}
.btn-text:hover{color:var(--brand-400);text-decoration-color:var(--brand-400)}
.btn-text:active{color:var(--brand-700)}

.hamburger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  color:var(--t-hi);font-size:17px;transition:background .2s,border-color .2s;
}
.hamburger:hover{background:rgba(255,255,255,.06);border-color:rgba(95,240,227,.4)}

/* ============ badges / chips ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;
  border-radius:999px;font-size:13px;line-height:1;white-space:nowrap;
}
.badge-brand{background:rgba(34,211,197,.12);color:var(--brand-400)}
.badge-accent{background:rgba(255,138,76,.14);color:var(--accent-400)}
.badge-neutral{background:rgba(255,255,255,.06);color:var(--t-mid)}

.chip{
  display:inline-flex;align-items:center;gap:8px;
  height:36px;padding:0 14px;border-radius:999px;
  font-size:13.5px;color:var(--t-mid);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  transition:color .2s,border-color .2s,background .2s;
}
.chip:hover{color:var(--t-hi);border-color:rgba(95,240,227,.45);background:rgba(34,211,197,.08)}
.chip.is-on{color:var(--brand-400);border-color:rgba(34,211,197,.45);background:rgba(34,211,197,.1)}

/* ============ breadcrumb ============ */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-low);flex-wrap:wrap}
.crumb a{color:var(--t-mid);transition:color .2s}
.crumb a:hover{color:var(--brand-400)}
.crumb .sep{color:var(--t-low);opacity:.7}
.crumb .cur{color:var(--brand-400)}

/* ============ hero ============ */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:30px 0 54px}
.cat-hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(180deg,rgba(7,12,21,.84),rgba(7,12,21,.96)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero-grid{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  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:58px 58px;
  mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 20%,transparent 78%);
}
.glow-orb{
  position:absolute;width:560px;height:560px;border-radius:50%;z-index:1;pointer-events:none;
  background:radial-gradient(circle,rgba(34,211,197,.20),transparent 65%);
  filter:blur(18px);right:-160px;top:-220px;
}
.hero-content{position:relative;z-index:3}

.status-bar{
  display:inline-flex;align-items:center;gap:10px;padding:7px 15px;border-radius:999px;
  background:rgba(34,211,197,.08);border:1px solid rgba(34,211,197,.22);
  font-size:13px;color:var(--brand-400);
}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--brand-400);animation:pulse 2.2s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(95,240,227,.55)}
  70%{box-shadow:0 0 0 10px rgba(95,240,227,0)}
  100%{box-shadow:0 0 0 0 rgba(95,240,227,0)}
}

.hero-h1{font-size:clamp(30px,5vw,52px);letter-spacing:-.02em}
.hero-h1 .hl{color:var(--brand-400)}
.hero-sub{font-size:clamp(15px,1.6vw,17.5px);color:var(--t-mid);line-height:1.85;max-width:62ch}

.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.metric-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:14px;padding:14px 16px;
  transition:border-color .22s ease,transform .22s ease;
}
.metric-card:hover{border-color:rgba(95,240,227,.34);transform:translateY(-2px)}
.metric-num{font-size:clamp(20px,2.2vw,27px);font-weight:700;color:var(--brand-400);line-height:1.2}
.metric-num .unit{font-size:14px;color:var(--t-mid);margin-left:2px;font-weight:600}
.metric-label{font-size:12.5px;color:var(--t-low);margin-top:4px}

/* ============ layout section ============ */
.section{padding:64px 0}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media(min-width:768px){.section{padding:84px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-title{font-size:clamp(24px,2.6vw,32px)}
.sec-desc{color:var(--t-mid);font-size:15.5px;line-height:1.85;max-width:66ch}

/* ============ scene split ============ */
.scene-split{display:grid;gap:26px;grid-template-columns:1fr;align-items:center}
@media(min-width:1024px){.scene-split{grid-template-columns:1.05fr .95fr;gap:44px}}
.scene-figure{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line-strong);
  aspect-ratio:16/9;
  background:var(--ink-700);
}
.scene-figure img{width:100%;height:100%;object-fit:cover}
.scene-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,21,.05),rgba(7,12,21,.55));
}
.scene-cap{
  position:absolute;left:16px;bottom:14px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--t-hi);background:rgba(7,12,21,.6);
  border:1px solid var(--line-strong);border-radius:999px;padding:6px 12px;
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.point-list li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--line)}
.point-list li:last-child{border-bottom:none}
.point-list i{color:var(--brand-500);font-size:14px;margin-top:5px}
.point-list .pt-t{font-size:15px;color:var(--t-hi);font-weight:600}
.point-list .pt-d{font-size:13.5px;color:var(--t-mid);line-height:1.75;margin-top:2px}

/* ============ anchor + grouped list ============ */
.anchor-wrap{display:grid;gap:32px;grid-template-columns:1fr;align-items:start}
@media(min-width:1024px){.anchor-wrap{grid-template-columns:216px minmax(0,1fr);gap:48px}}
.anchor-panel{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--ink-700);padding:16px;
}
@media(min-width:1024px){
  .anchor-panel{position:sticky;top:96px;background:transparent;border:none;padding:0}
}
.anchor-title{
  font-size:12.5px;letter-spacing:.14em;color:var(--t-low);text-transform:uppercase;
  margin-bottom:12px;font-weight:600;
}
.anchor-nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
@media(min-width:1024px){.anchor-nav{flex-direction:column;overflow:visible;padding-bottom:0;gap:2px}}
.anchor-link{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14px;color:var(--t-mid);
  white-space:nowrap;border-left:2px solid transparent;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.anchor-link .a-num{font-size:12px;color:var(--t-low)}
.anchor-link:hover{color:var(--t-hi);background:rgba(255,255,255,.05)}
.anchor-link.is-active{color:var(--brand-400);background:rgba(34,211,197,.09);border-left-color:var(--brand-500)}
.anchor-foot{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t-low);line-height:1.8;
}
@media(max-width:1023px){.anchor-foot{display:none}}

.scene-group{margin-bottom:44px;scroll-margin-top:96px}
.scene-group:last-child{margin-bottom:0}
.group-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:16px}
.group-head h3{font-size:clamp(19px,2vw,22px)}
.group-head .g-sub{font-size:13.5px;color:var(--t-mid);margin-top:6px;line-height:1.75}
.group-head .g-count{font-size:12.5px;color:var(--t-low);white-space:nowrap}

.row-list{display:flex;flex-direction:column;gap:6px}
.row-item{
  position:relative;display:flex;gap:16px;align-items:flex-start;
  padding:15px 18px;border-radius:14px;border:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.row-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--brand-500);opacity:0;transition:opacity .22s ease;
}
.row-item:hover{background:rgba(255,255,255,.04);border-color:var(--line);transform:translateX(2px)}
.row-item:hover::before{opacity:1}
.row-num{font-size:13px;color:var(--t-low);padding-top:3px;min-width:26px}
.row-body{flex:1;min-width:0}
.row-title{display:block;font-size:15.5px;font-weight:600;color:var(--t-hi);line-height:1.5}
.row-desc{display:block;font-size:13.5px;color:var(--t-mid);line-height:1.75;margin-top:4px}
.row-arrow{color:var(--t-low);font-size:13px;padding-top:5px;transition:color .2s ease,transform .2s ease}
.row-item:hover .row-arrow{color:var(--brand-400);transform:translateX(3px)}

/* ============ timeline ============ */
.step-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:640px){.step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.step-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step-card{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 20px;transition:border-color .22s ease,transform .22s ease;
}
.step-card:hover{border-color:rgba(95,240,227,.34);transform:translateY(-2px)}
.step-num{font-size:13px;color:var(--brand-400)}
.step-card h3{font-size:17px;margin-top:10px}
.step-card p{font-size:13.5px;color:var(--t-mid);line-height:1.8;margin-top:8px}
.step-tag{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--t-low)}

/* ============ faq ============ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:16px;background:var(--ink-700);
  overflow:hidden;transition:border-color .22s ease;
}
.faq-item:hover{border-color:rgba(95,240,227,.28)}
.faq-item.open{border-color:rgba(95,240,227,.42)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--t-hi);
  position:relative;transition:color .2s ease;
}
.faq-q:hover{color:var(--brand-400)}
.faq-item.open .faq-q{color:var(--brand-400)}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--brand-500);
}
.faq-q i{font-size:13px;color:var(--t-low);transition:transform .22s ease,color .22s ease;flex-shrink:0}
.faq-item.open .faq-q i{transform:rotate(45deg);color:var(--brand-400)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-a-inner{padding:0 20px 19px;font-size:14.5px;color:var(--t-mid);line-height:1.9}

/* ============ cta band ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;
  border:1px solid rgba(34,211,197,.22);
  padding:44px 32px;
  background-image:linear-gradient(120deg,rgba(7,12,21,.9),rgba(11,22,34,.86)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,76,.22),transparent 65%);pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:grid;gap:24px;align-items:center}
@media(min-width:1024px){.cta-inner{grid-template-columns:1.35fr .65fr}}
.cta-title{font-size:clamp(22px,2.4vw,30px)}
.cta-note{font-size:13.5px;color:var(--t-low);margin-top:14px;line-height:1.8}

/* ============ related categories ============ */
.cat-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  transition:border-color .24s ease,transform .24s ease;
}
.cat-card:hover{border-color:rgba(95,240,227,.4);transform:translateY(-3px)}
.cat-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-800)}
.cat-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cat-card:hover .thumb img{transform:scale(1.04)}
.cat-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,12,21,.1),rgba(7,12,21,.7))}
.cat-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.cat-card h3{font-size:17.5px}
.cat-card p{font-size:13.5px;color:var(--t-mid);line-height:1.8;flex:1}
.cat-card .foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:4px}

/* ============ footer ============ */
.site-footer{background:var(--ink-800);border-top:1px solid var(--line);padding:58px 0 0;margin-top:0}
.foot-title{font-size:14px;font-weight:700;color:var(--t-hi);margin-bottom:14px}
.foot-link{display:block;font-size:14px;color:var(--t-mid);padding:5px 0;transition:color .2s ease,transform .2s ease}
.foot-link:hover{color:var(--brand-400);transform:translateX(2px)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  margin-top:46px;border-top:1px solid var(--line);padding:20px 0;
  font-size:13px;color:var(--t-low);
}

/* ============ to top ============ */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-500);color:#04140F;font-size:16px;
  box-shadow:0 0 0 1px rgba(34,211,197,.35),0 16px 38px -14px rgba(34,211,197,.9);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,visibility .28s ease,transform .28s ease,background .2s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--brand-400)}
.to-top:active{background:var(--brand-700)}

/* ============ mobile drawer ============ */
.drawer{position:fixed;inset:0;z-index:80;display:none}
.drawer.open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(4,8,14,.72);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(88vw,370px);
  background:var(--ink-800);border-left:1px solid var(--line-strong);
  padding:18px;overflow-y:auto;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;color:var(--t-hi);transition:background .2s}
.drawer-close:hover{background:rgba(255,255,255,.06)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.drawer-nav a{padding:13px 14px;border-radius:12px;font-size:15px;color:var(--t-mid);transition:background .2s,color .2s}
.drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--t-hi)}
.drawer-nav a.active{color:var(--brand-400);background:rgba(34,211,197,.1)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}
@media(max-width:520px){
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-h1{font-size:28px}
  .cta-band{padding:32px 20px}
  .to-top{right:14px;bottom:18px;width:42px;height:42px}
}