/* roulang page: index */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --r-card:16px;
  --r-lg:20px;
  --r-pill:999px;
  --r-img:12px;
  --r-input:12px;
  --sh:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-hover:0 26px 52px -22px rgba(0,0,0,.88), 0 0 0 1px rgba(18,225,196,.3);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding-bottom:84px;
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--text-hi);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--brand-500)}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,225,196,.28);color:#fff}
.num{font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.wrap{padding:0 32px}}
@media (min-width:1440px){.wrap{max-width:1280px}}
.sec{padding:56px 0}
@media (min-width:1024px){.sec{padding:96px 0}}
.sec-alt{background:var(--ink-800);position:relative}
.sec-alt::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:28px 28px;pointer-events:none}
.sec-alt > *{position:relative;z-index:1}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,3.2vw,36px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.sec-head p{margin-top:14px;color:var(--text-mid);font-size:16px;max-width:62ch}
.sec-head--split{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;max-width:none}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand-500);border-bottom:1px solid transparent;padding-bottom:2px}
.link-more:hover{border-bottom-color:var(--brand-500)}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:0;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease,color .25s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent-500),var(--accent-600));
  color:#1B0A00;
  box-shadow:0 12px 30px -8px var(--accent-glow);
}
.btn-primary:hover{color:#1B0A00;transform:translateY(-2px);box-shadow:0 20px 42px -10px var(--accent-glow);filter:brightness(1.08)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:rgba(16,24,41,.6);
  border:1px solid var(--line-strong);
  color:var(--text-hi);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.btn-ghost:hover{background:rgba(18,225,196,.14);border-color:var(--brand-500);color:var(--text-hi);transform:translateY(-2px)}
.btn-sm{min-height:44px;padding:0 20px;font-size:14px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;line-height:1.6;font-weight:600;
  border:1px solid rgba(18,225,196,.32);
  background:rgba(18,225,196,.12);
  color:var(--brand-500);
}
.badge-warm{border-color:rgba(255,122,47,.34);background:rgba(255,122,47,.12);color:#FFAA78}
.badge-mute{border-color:var(--line-strong);background:rgba(255,255,255,.06);color:var(--text-mid)}
/* ============ Dock 导航 ============ */
.dock-wrap{
  position:fixed;top:20px;left:0;right:0;z-index:120;
  display:flex;justify-content:center;padding:0 16px;
  transition:top .3s ease;
}
.dock{
  width:100%;max-width:1080px;
  display:flex;align-items:center;gap:14px;
  padding:10px 12px 10px 18px;
  border-radius:var(--r-pill);
  background:rgba(16,24,41,.55);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  box-shadow:0 18px 40px -18px rgba(0,0,0,.75),inset 0 1px 0 rgba(255,255,255,.06);
  transition:padding .3s ease,background .3s ease,max-width .3s ease;
}
.dock-wrap.is-scrolled{top:10px}
.dock-wrap.is-scrolled .dock{padding:6px 10px 6px 16px;background:rgba(10,16,32,.88)}
.dock-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(18,225,196,.22),rgba(16,24,41,.9));
  border:1px solid rgba(18,225,196,.35);
  box-shadow:0 0 0 4px rgba(18,225,196,.06);
}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:15px;font-weight:700;letter-spacing:.01em;color:var(--text-hi)}
.brand-text i{font-style:normal;font-size:11px;color:var(--brand-500);letter-spacing:.12em}
.dock-menu{display:flex;align-items:center;gap:2px;flex:1 1 auto;justify-content:center;flex-wrap:nowrap}
.dock-menu a{
  display:inline-flex;align-items:center;min-height:44px;
  padding:0 14px;border-radius:var(--r-pill);
  font-size:14px;color:var(--text-mid);white-space:nowrap;
  transition:background .25s ease,color .25s ease;
}
.dock-menu a:hover{background:rgba(255,255,255,.06);color:var(--text-hi)}
.dock-menu a.is-active{background:rgba(18,225,196,.14);color:var(--brand-500);font-weight:600}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--text-mid);transition:all .25s ease;
}
.icon-btn:hover{color:var(--brand-500);border-color:rgba(18,225,196,.45);background:rgba(18,225,196,.1)}
.icon-btn svg{width:18px;height:18px}
.burger{display:none;width:44px;height:44px;border-radius:50%;place-items:center;border:1px solid var(--line);background:rgba(255,255,255,.04)}
.burger span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.mnav{
  position:fixed;top:0;left:0;right:0;z-index:110;
  padding:88px 16px 20px;
  background:rgba(8,12,24,.94);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transform:translateY(-102%);
  transition:transform .32s ease;
  display:none;
}
.mnav.is-open{transform:translateY(0)}
.mnav ul{display:grid;gap:6px}
.mnav a{display:flex;align-items:center;min-height:52px;padding:0 16px;border-radius:14px;font-size:15px;color:var(--text-mid);background:rgba(255,255,255,.03);border:1px solid var(--line)}
.mnav a.is-active{color:var(--brand-500);border-color:rgba(18,225,196,.35);background:rgba(18,225,196,.1)}
.mnav .mnav-cta{margin-top:12px;display:grid}
@media (max-width:1023px){
  .dock-menu{display:none}
  .burger{display:grid}
  .mnav{display:block}
  .dock-actions .btn-primary{display:none}
}
@media (max-width:520px){
  .brand-text b{font-size:14px}
  .brand-text i{font-size:10px}
}
/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:150px 0 72px;
  background:
    radial-gradient(900px 460px at 88% -6%, rgba(18,225,196,.14), transparent 62%),
    linear-gradient(180deg,#05070E 0%,#070B16 62%,#05070E 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;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:24px 24px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 88%);
}
.hero-slash{
  position:absolute;top:-80px;left:-160px;width:620px;height:820px;
  background:linear-gradient(180deg,rgba(18,225,196,.1),rgba(18,225,196,0));
  transform:rotate(22deg);pointer-events:none;
}
.hero-glow{
  position:absolute;top:-140px;right:-120px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(18,225,196,.2),transparent 66%);
  pointer-events:none;
}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1fr;gap:44px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px}}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;padding:6px 14px 6px 8px;border-radius:var(--r-pill);border:1px solid var(--line-strong);background:rgba(16,24,41,.6);font-size:13px;color:var(--text-mid)}
.hero-eyebrow em{font-style:normal;color:var(--brand-500);font-weight:600}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(18,225,196,.16)}
.hero h1{
  margin-top:22px;
  font-size:clamp(30px,5.2vw,54px);
  line-height:1.15;font-weight:800;letter-spacing:-.01em;
}
.hero h1 .hl{
  color:var(--brand-500);
  background:linear-gradient(180deg,transparent 62%,rgba(18,225,196,.2) 62%);
}
.hero-sub{margin-top:20px;font-size:clamp(15px,1.5vw,17px);line-height:1.85;color:var(--text-mid);max-width:62ch}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
@media (max-width:520px){.hero-actions{display:grid}.hero-actions .btn{width:100%}}
.hero-points{margin-top:36px;display:flex;flex-wrap:wrap;gap:14px 28px}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-mid)}
.hero-points svg{width:18px;height:18px;color:var(--brand-500);flex:0 0 auto}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--sh);background:linear-gradient(150deg,#0D1626,#060A14)}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;opacity:.92}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,14,.08) 0%,rgba(5,7,14,.72) 100%)}
.hero-corner{position:absolute;top:14px;left:14px;width:34px;height:34px;border-left:2px solid var(--brand-500);border-top:2px solid var(--brand-500);border-radius:6px 0 0 0;z-index:2}
.hero-chip{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:3;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;border-radius:14px;
  background:rgba(10,16,32,.78);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);
}
.hero-chip strong{display:block;font-size:15px;font-weight:700;color:var(--text-hi)}
.hero-chip span{font-size:12px;color:var(--text-low)}
.hero-chip b{font-size:26px;color:var(--accent-500);font-weight:800;line-height:1}
.hero-strip{
  margin-top:56px;display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--line);
}
@media (min-width:768px){.hero-strip{grid-template-columns:repeat(4,1fr)}}
.hero-strip li{background:rgba(10,16,32,.7);padding:20px 18px}
.hero-strip strong{display:block;font-size:clamp(22px,3vw,30px);font-weight:800;color:var(--accent-500);line-height:1.2}
.hero-strip span{display:block;margin-top:6px;font-size:13px;color:var(--text-low)}
/* ============ 卖点三连 ============ */
.feature-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:1024px){.feature-grid{grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:24px}}
.card{
  position:relative;border-radius:var(--r-card);border:1px solid var(--line);
  background:rgba(16,24,41,.55);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  overflow:hidden;
}
.card:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-hover)}
.card:hover .card-title{color:var(--brand-500)}
.card:hover img{transform:scale(1.04)}
.card-media{overflow:hidden;position:relative}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease}
.feature-lead{display:flex;flex-direction:column}
.feature-lead .card-media img{aspect-ratio:16/9}
.feature-lead .card-body{padding:28px 28px 30px}
.card-body{padding:24px}
.card-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:44px;height:28px;padding:0 10px;border-radius:8px;
  font-size:13px;font-weight:800;letter-spacing:.06em;
  color:var(--accent-500);background:rgba(255,122,47,.12);border:1px solid rgba(255,122,47,.28);
}
.card-title{margin-top:16px;font-size:clamp(18px,2vw,22px);font-weight:600;line-height:1.4;transition:color .3s ease}
.card-text{margin-top:12px;color:var(--text-mid);font-size:15px;line-height:1.85}
.feature-stack{display:grid;gap:20px}
.feature-mini{display:flex;gap:18px;padding:24px;align-items:flex-start}
.feature-mini .icon-box{
  width:52px;height:52px;border-radius:14px;flex:0 0 auto;display:grid;place-items:center;
  background:rgba(18,225,196,.1);border:1px solid rgba(18,225,196,.28);color:var(--brand-500);
}
.feature-mini .icon-box svg{width:24px;height:24px}
.feature-mini h3{margin-top:4px;font-size:18px;font-weight:600}
.feature-mini p{margin-top:8px;font-size:14.5px;color:var(--text-mid)}
/* ============ 场景演示 ============ */
.scene-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
@media (min-width:1024px){.scene-grid{grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:52px}}
.device-frame{
  border-radius:var(--r-card);border:1px solid var(--line-strong);overflow:hidden;
  background:#0A1020;box-shadow:var(--sh);
}
.device-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.03)}
.device-bar i{width:10px;height:10px;border-radius:50%;display:block}
.device-bar i:nth-child(1){background:#FF5F57}
.device-bar i:nth-child(2){background:#FEBC2E}
.device-bar i:nth-child(3){background:#28C840}
.device-bar em{margin-left:10px;font-style:normal;font-size:12px;color:var(--text-low);letter-spacing:.02em}
.device-frame img{width:100%;aspect-ratio:16/10;object-fit:cover}
.timeline{display:grid;gap:0}
.timeline li{position:relative;padding:0 0 30px 60px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:19px;top:34px;bottom:0;width:1px;background:linear-gradient(180deg,rgba(18,225,196,.4),rgba(18,225,196,0))}
.timeline li:last-child::before{display:none}
.timeline .step-dot{
  position:absolute;left:0;top:0;width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;font-size:14px;font-weight:800;color:var(--brand-500);
  background:rgba(18,225,196,.1);border:1px solid rgba(18,225,196,.4);
  font-variant-numeric:tabular-nums;
}
.timeline h3{font-size:18px;font-weight:600;line-height:1.5}
.timeline p{margin-top:8px;font-size:14.5px;color:var(--text-mid);max-width:56ch}
@media (max-width:767px){
  .timeline{display:flex;gap:14px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
  .timeline li{flex:0 0 78%;padding:0;scroll-snap-align:start}
  .timeline li::before{display:none}
  .timeline .step-dot{position:static;margin-bottom:14px}
}
/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{display:flex;flex-direction:column;height:100%}
.news-card .news-link{display:flex;flex-direction:column;height:100%}
.news-thumb{overflow:hidden;position:relative;background:linear-gradient(140deg,#0E1727,#070B14)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.news-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;
  transition:color .3s ease;
}
.news-card:hover .news-body h3{color:var(--brand-500)}
.news-body p{
  font-size:14px;color:var(--text-mid);line-height:1.8;flex:1 1 auto;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--text-low);border-top:1px solid var(--line);padding-top:12px}
.news-meta time{font-variant-numeric:tabular-nums}
.empty-state{
  border:1px dashed rgba(255,255,255,.18);border-radius:var(--r-card);
  background:rgba(16,24,41,.4);
  min-height:180px;max-height:240px;
  display:grid;place-items:center;text-align:center;padding:28px 20px;gap:12px;
}
.empty-state svg{width:34px;height:34px;color:var(--brand-500);opacity:.85}
.empty-state p{color:var(--text-mid);font-size:15px}
/* ============ 社会认同 ============ */
.stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;margin-bottom:44px}
@media (min-width:768px){.stat-row{grid-template-columns:repeat(4,1fr)}}
.stat-row li{background:rgba(10,16,32,.72);padding:26px 22px}
.stat-row strong{display:block;font-size:clamp(26px,3.4vw,36px);font-weight:800;color:var(--accent-500);line-height:1.15;font-variant-numeric:tabular-nums}
.stat-row span{display:block;margin-top:8px;font-size:13.5px;color:var(--text-mid)}
.quote-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.quote-grid{grid-template-columns:repeat(3,1fr)}}
.quote-card{padding:26px 24px;display:flex;flex-direction:column;gap:14px}
.quote-head{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;font-size:15px;font-weight:700;color:#04211C;background:linear-gradient(140deg,var(--brand-500),var(--brand-600))}
.quote-head b{display:block;font-size:15px;font-weight:600}
.quote-head span{display:block;font-size:12.5px;color:var(--text-low)}
.quote-card p{font-size:14.5px;color:var(--text-mid);line-height:1.85}
.stars{display:flex;gap:3px;color:var(--accent-500)}
.stars svg{width:15px;height:15px}
.logo-strip{margin-top:40px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center;opacity:.62;filter:grayscale(1)}
.logo-strip span{
  padding:10px 20px;border-radius:var(--r-pill);border:1px solid var(--line);
  font-size:13px;color:var(--text-low);background:rgba(255,255,255,.03);letter-spacing:.04em;
}
/* ============ FAQ ============ */
.faq-list{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:rgba(16,24,41,.5)}
.faq-item + .faq-item{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding:18px 24px;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-hi);
  transition:color .25s ease,background .25s ease;
}
.faq-q:hover{color:var(--brand-500);background:rgba(255,255,255,.02)}
.faq-q .sign{position:relative;width:20px;height:20px;flex:0 0 auto;transition:transform .36s ease}
.faq-q .sign::before,.faq-q .sign::after{content:"";position:absolute;background:var(--brand-500);border-radius:2px}
.faq-q .sign::before{left:0;top:9px;width:20px;height:2px}
.faq-q .sign::after{left:9px;top:0;width:2px;height:20px;transition:opacity .25s ease}
.faq-item.is-open .faq-q{color:var(--brand-500)}
.faq-item.is-open .faq-q .sign{transform:rotate(180deg)}
.faq-item.is-open .faq-q .sign::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 24px 24px;color:var(--text-mid);font-size:15px;line-height:1.9;max-width:74ch}
/* ============ 收尾 CTA ============ */
.cta-card{
  border-radius:var(--r-lg);border:1px solid var(--line-strong);
  background:linear-gradient(150deg,rgba(16,24,41,.9),rgba(8,12,24,.9));
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  padding:36px 24px;display:grid;gap:32px;
  box-shadow:var(--sh);
  position:relative;overflow:hidden;
}
@media (min-width:1024px){.cta-card{padding:52px 48px;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:56px;align-items:center}}
.cta-card::before{content:"";position:absolute;top:-120px;right:-120px;width:360px;height:360px;background:radial-gradient(circle,rgba(255,122,47,.16),transparent 68%);pointer-events:none}
.cta-card h2{font-size:clamp(24px,3.2vw,34px);font-weight:700;line-height:1.3;position:relative;z-index:1}
.cta-card > div > p{margin-top:16px;color:var(--text-mid);font-size:15.5px;max-width:56ch;position:relative;z-index:1}
.cta-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1}
.form-box{position:relative;z-index:1;display:grid;gap:14px;background:rgba(5,7,14,.5);border:1px solid var(--line);border-radius:var(--r-card);padding:24px}
.field{display:grid;gap:8px}
.field label{font-size:13.5px;color:var(--text-mid);font-weight:600;letter-spacing:.01em}
.field input{
  height:50px;padding:0 16px;border-radius:var(--r-input);
  background:rgba(255,255,255,.04);border:1px solid var(--line-strong);
  color:var(--text-hi);transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
  width:100%;
}
.field input::placeholder{color:var(--text-low)}
.field input:focus{outline:none;border-color:var(--brand-500);background:rgba(18,225,196,.06);box-shadow:0 0 0 4px rgba(18,225,196,.16)}
.field.has-error input{border-color:var(--err);box-shadow:0 0 0 4px rgba(255,92,108,.14)}
.field-msg{font-size:12.5px;color:var(--err);min-height:18px}
.form-box .btn{width:100%}
.form-note{font-size:12.5px;color:var(--text-low);line-height:1.7}
/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:#04060C;margin-top:96px;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:minmax(0,4fr) minmax(0,2.6fr) minmax(0,2.6fr) minmax(0,2.8fr);gap:40px}}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--text-hi);margin-bottom:18px}
.footer-col p{font-size:14px;color:var(--text-mid);line-height:1.9;max-width:42ch}
.footer-links{display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:var(--text-mid);transition:color .22s ease,transform .22s ease}
.footer-links a:hover{color:var(--brand-500);transform:translateX(4px)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.footer-bottom{
  margin-top:52px;border-top:1px solid var(--line);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--brand-500)}
/* ============ 底部固定转化条 ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:100;
  background:rgba(9,13,25,.86);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-top:1px solid var(--line);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  transform:translateY(0);opacity:1;
  transition:transform .3s ease,opacity .3s ease;
}
.sticky-cta.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.sticky-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px}
.sticky-inner p{font-size:13.5px;color:var(--text-mid);line-height:1.5}
@media (max-width:520px){
  .sticky-inner p{font-size:12.5px}
  .sticky-inner .btn{padding:0 18px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --r-card:16px;
  --r-big:20px;
  --r-pill:999px;
  --r-img:12px;
  --sh-stat:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-hover:0 26px 48px -20px rgba(0,0,0,.85),0 0 0 1px rgba(18,225,196,.3);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:-.01em;
  overflow-x:hidden;
  padding-bottom:88px;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--text-hi);text-decoration:none;transition:color .25s ease-out,border-color .25s ease-out}
a:hover{color:var(--brand-500)}
p{margin:0 0 1.1em}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;font-weight:700}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;background:none;border:0;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,225,196,.28)}
.num{font-variant-numeric:tabular-nums}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}
@media(min-width:1280px){.wrap{max-width:1280px}}

/* ---------- Dock 导航 ---------- */
.dock-wrap{position:fixed;top:0;left:0;right:0;z-index:60;padding:20px 16px 0;transition:padding .3s ease-out}
.dock-wrap.is-stuck{padding-top:10px}
.dock{
  max-width:1080px;margin:0 auto;
  display:flex;align-items:center;gap:var(--sp-5);
  padding:10px 14px 10px 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(16,24,41,.55);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-stat),inset 0 1px 0 rgba(255,255,255,.06);
  transition:background .3s ease-out,box-shadow .3s ease-out,transform .3s ease-out;
}
.dock-wrap.is-stuck .dock{background:rgba(10,16,32,.86);box-shadow:0 20px 42px -22px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.07)}
.dock-brand{display:flex;align-items:center;gap:10px;min-height:44px;flex:0 0 auto}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line-strong);background:linear-gradient(150deg,rgba(18,225,196,.16),rgba(16,24,41,.6));flex:0 0 auto}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;font-weight:800;letter-spacing:0}
.brand-text i{font-style:normal;font-size:11px;color:var(--brand-500);letter-spacing:.16em}
.dock-menu{display:flex;align-items:center;gap:2px;margin-left:var(--sp-4);flex:1 1 auto}
.dock-menu a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:var(--r-pill);font-size:14.5px;color:var(--text-mid);white-space:nowrap;transition:background .25s ease-out,color .25s ease-out}
.dock-menu a:hover{color:var(--text-hi);background:rgba(255,255,255,.05)}
.dock-menu a.is-active{color:#03110F;background:var(--brand-500);font-weight:700}
.dock-menu a.is-active:hover{color:#03110F;background:var(--brand-500)}
.dock-actions{display:flex;align-items:center;gap:var(--sp-3);flex:0 0 auto}
.icon-btn{width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-pill);border:1px solid var(--line);color:var(--text-mid);transition:color .25s,background .25s,border-color .25s}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--brand-500);border-color:rgba(18,225,196,.5);background:rgba(18,225,196,.1)}
.burger{display:none;width:44px;height:44px;position:relative;border-radius:var(--r-pill);border:1px solid var(--line)}
.burger span,.burger span::before,.burger span::after{content:"";position:absolute;left:50%;width:17px;height:1.6px;background:var(--text-hi);border-radius:2px;transform:translateX(-50%);transition:transform .25s ease-out,opacity .25s ease-out}
.burger span{top:50%;margin-top:-.8px}
.burger span::before{left:0;top:-6px;transform:none}
.burger span::after{left:0;top:6px;transform:none}
.burger.is-open span{background:transparent}
.burger.is-open span::before{transform:translateY(6px) rotate(45deg)}
.burger.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 26px;border-radius:var(--r-pill);font-size:15px;font-weight:700;border:1px solid transparent;transition:transform .25s ease-out,box-shadow .25s ease-out,background .25s ease-out,border-color .25s ease-out,color .25s ease-out}
.btn-sm{min-height:44px;padding:0 20px;font-size:14px}
.btn-primary{background:linear-gradient(180deg,var(--accent-500),var(--accent-600));color:#210C02;box-shadow:0 12px 30px -8px var(--accent-glow)}
.btn-primary:hover{color:#210C02;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 18px 40px -8px var(--accent-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--line-strong);color:var(--text-hi);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--brand-500);background:rgba(18,225,196,.14);color:var(--text-hi);transform:translateY(-2px)}

.mnav{display:none}

/* ---------- 页头 ---------- */
.page-head{position:relative;padding:150px 0 56px;overflow:hidden;border-bottom:1px solid var(--line);background:var(--ink-900)}
.page-head::before{content:"";position:absolute;inset:0;background:
  linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px) 0 0/100% 24px,
  linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px) 0 0/24px 100%;
  opacity:.9;pointer-events:none}
.page-head::after{content:"";position:absolute;top:-140px;right:-120px;width:520px;height:520px;background:radial-gradient(circle,rgba(18,225,196,.2),transparent 62%);pointer-events:none}
.page-head .wrap{position:relative;z-index:2}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:20px}
.crumbs a{color:var(--text-mid)}
.crumbs span.sep{color:var(--text-low);opacity:.6}
.crumbs .cur{color:var(--brand-500)}
.page-head h1{font-size:clamp(30px,5.2vw,54px);line-height:1.15;font-weight:800;max-width:22ch}
.page-head .lead{margin-top:18px;max-width:62ch;color:var(--text-mid);font-size:16.5px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--r-pill);font-size:13px;color:var(--brand-500);border:1px solid rgba(18,225,196,.32);background:rgba(18,225,196,.1)}
.tag.alt{color:var(--text-mid);border-color:var(--line-strong);background:rgba(255,255,255,.04)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section.alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:var(--sp-7)}
.sec-head .kick{display:inline-block;font-size:13px;letter-spacing:.2em;color:var(--brand-500);text-transform:uppercase;margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,3.2vw,36px);line-height:1.25}
.sec-head p{margin-top:14px;color:var(--text-mid);max-width:62ch}

/* ---------- 步骤 + 侧栏 ---------- */
.grid-steps{display:grid;grid-template-columns:1fr;gap:var(--sp-7)}
@media(min-width:1024px){.grid-steps{grid-template-columns:minmax(0,1fr) 340px;gap:56px}}
.steps{position:relative}
.step{display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;position:relative;padding-bottom:44px}
@media(min-width:768px){.step{grid-template-columns:84px minmax(0,1fr);gap:26px;padding-bottom:56px}}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:31px;top:70px;bottom:0;width:1px;background:linear-gradient(180deg,rgba(18,225,196,.5),rgba(255,255,255,.06));}
@media(min-width:768px){.step::before{left:41px}}
.step:last-child::before{display:none}
.step-num{font-size:40px;line-height:1;font-weight:800;color:var(--accent-500);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
@media(min-width:768px){.step-num{font-size:52px}}
.step-body{padding-top:4px}
.step-body h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.step-body p{color:var(--text-mid);margin-bottom:12px;max-width:62ch}
.ticks{display:grid;gap:8px;margin-top:14px}
.ticks li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-mid)}
.ticks li::before{content:"";position:absolute;left:0;top:.68em;width:7px;height:7px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 4px rgba(18,225,196,.14)}
.shot{margin-top:20px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:var(--ink-700);box-shadow:var(--sh-stat)}
.shot img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease-out}
.shot:hover img{transform:scale(1.04)}
.shot figcaption{padding:12px 16px;font-size:13px;color:var(--text-low);border-top:1px solid var(--line)}

.side-card{position:sticky;top:104px;padding:26px;border-radius:var(--r-big);border:1px solid var(--line);background:rgba(16,24,41,.6);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--sh-stat),inset 0 1px 0 rgba(255,255,255,.06)}
.side-card h3{font-size:18px;margin-bottom:8px}
.side-card>p{font-size:14px;color:var(--text-mid);margin-bottom:18px}
.side-links{display:grid;gap:6px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:48px;padding:0 14px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.03);font-size:14.5px;transition:border-color .25s,background .25s,transform .25s,color .25s}
.side-links a i{font-style:normal;color:var(--brand-500);font-size:12px}
.side-links a:hover{border-color:rgba(18,225,196,.5);background:rgba(18,225,196,.12);transform:translateX(3px)}
.side-note{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--text-low)}
@media(max-width:1023px){.side-card{position:static;margin-top:8px}}

/* ---------- 核对清单 ---------- */
.check-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.check-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.check-card{padding:24px;border-radius:var(--r-card);border:1px solid var(--line);background:rgba(16,24,41,.5);transition:transform .3s ease-out,border-color .3s ease-out,box-shadow .3s ease-out}
.check-card:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-hover)}
.check-card h3{font-size:17px;margin-bottom:8px;transition:color .3s}
.check-card:hover h3{color:var(--brand-500)}
.check-card p{font-size:14.5px;color:var(--text-mid);margin:0}
.badge{display:inline-block;padding:3px 10px;border-radius:var(--r-pill);font-size:12px;border:1px solid rgba(18,225,196,.32);background:rgba(18,225,196,.12);color:var(--brand-500);margin-bottom:14px}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:var(--sp-7)}
@media(min-width:1024px){.faq-layout{grid-template-columns:300px minmax(0,1fr);gap:56px}}
ul.accordion{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:rgba(16,24,41,.45);margin:0}
ul.accordion li.accordion-item{border-bottom:1px solid var(--line);list-style:none}
ul.accordion li.accordion-item:last-child{border-bottom:0}
ul.accordion li.accordion-item.is-active{background:rgba(18,225,196,.05)}
a.accordion-title{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:16px 22px;font-size:16px;font-weight:600;color:var(--text-hi);position:relative;transition:color .25s}
a.accordion-title:hover{color:var(--brand-500)}
a.accordion-title::before{content:"+";order:2;font-size:22px;font-weight:400;color:var(--brand-500);line-height:1;transition:transform .3s ease-out}
.accordion-item.is-active a.accordion-title::before{transform:rotate(45deg)}
.accordion-content{padding:0 22px 20px;color:var(--text-mid);font-size:15px}
.accordion-content p:last-child{margin-bottom:0}

/* ---------- CTA ---------- */
.cta-box{border-radius:var(--r-big);border:1px solid var(--line-strong);background:linear-gradient(140deg,rgba(18,225,196,.1),rgba(16,24,41,.7) 46%,rgba(255,122,47,.1));backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--sh-stat),inset 0 1px 0 rgba(255,255,255,.06);padding:40px 24px}
@media(min-width:768px){.cta-box{padding:56px}}
.cta-box h2{font-size:clamp(24px,3.2vw,36px);line-height:1.25;max-width:24ch}
.cta-box>p{margin-top:16px;color:var(--text-mid);max-width:60ch}
.form-inline{margin-top:30px;display:grid;gap:12px;max-width:520px}
.field label{display:block;font-size:13px;color:var(--text-mid);margin-bottom:8px}
.field input{width:100%;height:52px;padding:0 16px;border-radius:12px;border:1px solid var(--line-strong);background:rgba(5,7,14,.7);color:var(--text-hi);transition:border-color .25s,box-shadow .25s}
.field input::placeholder{color:var(--text-low)}
.field input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(18,225,196,.16)}
.field.has-error input{border-color:var(--err);box-shadow:0 0 0 4px rgba(255,92,108,.14)}
.field .tip{display:none;margin-top:8px;font-size:13px;color:var(--err)}
.field.has-error .tip{display:block}
.form-row{display:flex;flex-wrap:wrap;gap:12px}
.form-row .field{flex:1 1 260px}
.form-msg{margin-top:14px;font-size:14px;color:var(--brand-500);min-height:22px}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:0;background:var(--ink-800);border-top:1px solid var(--line);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:var(--sp-6)}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text-hi)}
.footer-col p{font-size:14px;color:var(--text-mid);max-width:44ch}
.footer-links{display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:40px;font-size:14.5px;color:var(--text-mid);transition:color .25s,padding-left .25s}
.footer-links a:hover{color:var(--brand-500);padding-left:6px}
.footer-bottom{margin-top:var(--sp-7);padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--text-low)}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--brand-500)}

/* ---------- 底部固定条 ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:55;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 16px calc(0px + env(safe-area-inset-bottom));background:rgba(10,16,32,.82);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);border-top:1px solid var(--line-strong);transition:transform .35s ease-out,opacity .35s ease-out}
@media(min-width:768px){.sticky-cta{padding:0 32px}}
.sticky-cta .txt{font-size:14px;color:var(--text-mid);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sticky-cta.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}

@media(max-width:1023px){
  .dock-menu{display:none}
  .burger{display:grid;place-items:center}
  .dock{gap:var(--sp-3);padding:8px 10px 8px 14px}
  .dock-actions{margin-left:auto}
  .mnav{display:block;position:fixed;left:0;right:0;top:0;z-index:59;padding:88px 20px 26px;background:rgba(5,7,14,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line-strong);transform:translateY(-110%);transition:transform .35s ease-out}
  .mnav.is-open{transform:translateY(0)}
  .mnav a{display:flex;align-items:center;min-height:52px;padding:0 14px;border-radius:12px;font-size:16px;color:var(--text-mid);border:1px solid transparent}
  .mnav a:hover,.mnav a.is-active{color:var(--text-hi);border-color:rgba(18,225,196,.4);background:rgba(18,225,196,.12)}
  .mnav .mnav-cta{margin-top:14px;justify-content:center;color:#210C02}
  .page-head{padding:126px 0 48px}
}
@media(max-width:767px){
  .section{padding:56px 0}
  .step{grid-template-columns:48px minmax(0,1fr);gap:14px;padding-bottom:36px}
  .step::before{left:23px;top:56px}
  .step-num{font-size:34px}
  .btn{width:100%}
  .dock .btn-sm{width:auto}
  .form-row .btn{width:100%}
}
@media(max-width:520px){
  body{font-size:15.5px}
  .brand-text b{font-size:15px}
  .sticky-cta .txt{font-size:13px}
}
@media(prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important}
  .shot:hover img{transform:none}
}

/* roulang page: article */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --glass:rgba(16,24,41,.55);
  --r-card:16px;
  --r-lg:20px;
  --r-img:12px;
  --r-pill:999px;
  --sh:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-strong:0 26px 52px -20px rgba(0,0,0,.85);
  --ease:cubic-bezier(.22,.61,.36,1);
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:64px; --s9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img)}
a{color:var(--text-hi);text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease)}
a:hover{color:var(--brand-500)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;line-height:1.25;font-weight:700}
p{margin:0}
::selection{background:rgba(18,225,196,.28);color:#fff}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.wrap{max-width:1280px;padding:0 32px}}

/* ============ Dock 导航 ============ */
.dock-wrap{
  position:sticky;top:0;z-index:60;
  padding:20px 16px 0;
  transition:padding .3s var(--ease),background .3s var(--ease),backdrop-filter .3s var(--ease);
}
.dock-wrap.is-stuck{
  padding:10px 16px 0;
  background:linear-gradient(180deg,rgba(5,7,14,.92),rgba(5,7,14,.35));
  backdrop-filter:blur(10px);
}
.dock{
  max-width:1080px;margin:0 auto;
  display:flex;align-items:center;gap:18px;
  padding:10px 14px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px) saturate(120%);
  transition:padding .3s var(--ease),background .3s var(--ease);
}
.dock-wrap.is-stuck .dock{padding:7px 14px;background:rgba(16,24,41,.78)}
.dock-brand{display:flex;align-items:center;gap:10px;min-height:44px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;display:grid;place-items:center;flex:0 0 34px;
  border-radius:12px;background:rgba(18,225,196,.10);border:1px solid rgba(18,225,196,.28);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:15px;font-weight:800;letter-spacing:-.01em}
.brand-text i{font-style:normal;font-size:11px;color:var(--brand-500);letter-spacing:.14em}
.dock-menu{display:none;align-items:center;gap:4px;margin:0 auto}
.dock-menu a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 13px;
  font-size:14px;color:var(--text-mid);border-radius:var(--r-pill);
  border:1px solid transparent;transition:all .24s var(--ease);white-space:nowrap;
}
.dock-menu a:hover{color:var(--text-hi);background:rgba(255,255,255,.06)}
.dock-menu a.is-active{
  color:#03201C;background:var(--brand-500);font-weight:600;
  box-shadow:0 8px 22px -10px var(--brand-glow);
}
.dock-menu a.is-active:hover{color:#03201C;background:var(--brand-500)}
.dock-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{
  width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);color:var(--text-mid);background:rgba(255,255,255,.03);
  transition:all .24s var(--ease);
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{color:var(--brand-500);border-color:rgba(18,225,196,.45);background:rgba(18,225,196,.10)}
.burger{
  width:44px;height:44px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.burger span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px;
  transition:transform .24s var(--ease);
}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.burger[aria-expanded="true"] span{background:transparent}
.burger[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}
.mnav{
  display:none;max-width:1080px;margin:10px auto 0;padding:14px;
  border-radius:var(--r-lg);background:rgba(10,16,32,.94);border:1px solid var(--line);
  box-shadow:var(--sh);backdrop-filter:blur(14px);
}
.mnav.is-open{display:block}
.mnav a{
  display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:12px;
  font-size:15px;color:var(--text-mid);border:1px solid transparent;
}
.mnav a:hover,.mnav a.is-active{color:var(--brand-500);background:rgba(18,225,196,.10);border-color:rgba(18,225,196,.24)}
.mnav .mnav-cta{margin-top:10px}
.mnav .mnav-cta a{justify-content:center;background:var(--accent-500);color:#210D02;font-weight:700}
@media (min-width:1024px){
  .dock-menu{display:flex}
  .burger{display:none}
  .mnav{display:none !important}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;transition:all .26s var(--ease);white-space:nowrap;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(180deg,var(--accent-500),var(--accent-600));
  color:#22100 2;color:#221002;
  box-shadow:0 12px 30px -8px var(--accent-glow);
}
.btn-primary:hover{color:#221002;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 18px 38px -10px var(--accent-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:rgba(255,255,255,.04);border-color:var(--line-strong);color:var(--text-hi);
}
.btn-ghost:hover{border-color:var(--brand-500);background:rgba(18,225,196,.14);color:var(--text-hi);transform:translateY(-2px)}
.btn-line{
  background:transparent;border-color:rgba(18,225,196,.4);color:var(--brand-500);
}
.btn-line:hover{background:rgba(18,225,196,.14);border-color:var(--brand-500)}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none}

/* ============ 面包屑 / 徽章 / 标签 ============ */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low)}
.crumbs a{color:var(--text-mid);min-height:24px;display:inline-flex;align-items:center}
.crumbs a:hover{color:var(--brand-500)}
.crumbs .sep{color:var(--text-low);opacity:.6}
.crumbs .cur{color:var(--text-hi);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);font-size:12px;line-height:1.5;
  border:1px solid rgba(18,225,196,.28);background:rgba(18,225,196,.12);color:var(--brand-500);
}
.badge.orange{border-color:rgba(255,122,47,.3);background:rgba(255,122,47,.12);color:var(--accent-500)}
.badge.plain{border-color:var(--line-strong);background:rgba(255,255,255,.04);color:var(--text-mid)}
.tag{
  display:inline-flex;align-items:center;min-height:34px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-mid);border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:all .24s var(--ease);
}
.tag:hover{border-color:rgba(18,225,196,.45);color:var(--brand-500);background:rgba(18,225,196,.1)}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;overflow:hidden;
  padding:56px 0 44px;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(90deg,rgba(18,225,196,.08) 0%,rgba(18,225,196,0) 42%),
    radial-gradient(680px 340px at 88% -10%,rgba(18,225,196,.16),transparent 70%),
    var(--ink-900);
}
.article-hero::before{
  content:"";position:absolute;inset:0;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:24px 24px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.8),transparent 85%);
}
.article-hero .wrap{position:relative;z-index:1}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 16px}
.article-hero h1{
  font-size:clamp(26px,4.4vw,44px);line-height:1.22;font-weight:800;
  max-width:900px;margin:0 0 18px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13px;color:var(--text-low);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--brand-500);font-size:12px}
.article-lead{
  max-width:820px;margin-top:20px;font-size:16px;line-height:1.9;color:var(--text-mid);
}
@media (min-width:768px){.article-hero{padding:72px 0 56px}}

/* ============ 正文布局 ============ */
.article-main{padding:56px 0 64px}
.article-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:1024px){
  .article-main{padding:72px 0 88px}
  .article-grid{grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
}

.reader{
  background:rgba(10,16,32,.6);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px 20px;
  box-shadow:var(--sh);
}
@media (min-width:768px){.reader{padding:44px 48px}}
.reader .article-body{max-width:820px}
.article-body p{margin:0 0 1.2em;font-size:16.5px;line-height:1.9;color:#DCE5F5}
.article-body h2{
  position:relative;margin:2em 0 .6em;padding-left:16px;
  font-size:clamp(21px,2.6vw,27px);line-height:1.35;font-weight:700;color:var(--text-hi);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:1.05em;border-radius:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--brand-600));
}
.article-body h3{
  margin:1.6em 0 .5em;font-size:18px;line-height:1.45;font-weight:600;color:var(--text-hi);
}
.article-body h4{margin:1.3em 0 .4em;font-size:16px;font-weight:600;color:var(--text-mid)}
.article-body a{color:var(--brand-500);border-bottom:1px solid rgba(18,225,196,.35)}
.article-body a:hover{color:#7BF3E2;border-bottom-color:#7BF3E2}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.3em}
.article-body ul li{list-style:none;position:relative;padding-left:18px;margin-bottom:.55em;color:#DCE5F5;line-height:1.85}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--brand-500);box-shadow:0 0 0 3px rgba(18,225,196,.15);
}
.article-body ol{counter-reset:olc}
.article-body ol li{list-style:none;position:relative;padding-left:30px;margin-bottom:.6em;color:#DCE5F5;line-height:1.85}
.article-body ol li::before{
  counter-increment:olc;content:counter(olc);
  position:absolute;left:0;top:.35em;width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;font-size:12px;font-weight:700;
  color:#031F1A;background:var(--brand-500);
}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;border-radius:var(--r-card);border-left:3px solid var(--brand-500);
  background:rgba(16,24,41,.6);color:var(--text-mid);font-size:15.5px;line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{margin:1.6em auto;border-radius:var(--r-img);border:1px solid var(--line)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--text-low);margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:14.5px}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{color:var(--text-hi);background:rgba(255,255,255,.04);font-weight:600}
.article-body td{color:var(--text-mid)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-body strong{color:var(--text-hi);font-weight:700}
.article-body code{
  padding:2px 7px;border-radius:6px;background:rgba(18,225,196,.10);color:var(--brand-500);font-size:.92em;
}

/* 空态 */
.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--line-strong);border-radius:var(--r-lg);
  background:rgba(16,24,41,.4);
}
.empty-state i{font-size:26px;color:var(--brand-500)}
.empty-state h2{margin:16px 0 8px;font-size:22px}
.empty-state p{color:var(--text-mid);margin-bottom:22px}

/* 文末标签 + 分享 */
.article-foot{
  margin-top:38px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
}
.article-foot .tags{display:flex;flex-wrap:wrap;gap:10px}
.share{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-low)}
.share a{
  width:40px;height:40px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);color:var(--text-mid);background:rgba(255,255,255,.03);
  transition:all .24s var(--ease);
}
.share a:hover{color:var(--brand-500);border-color:rgba(18,225,196,.45);background:rgba(18,225,196,.1)}

/* 侧栏 */
.side-card{
  padding:22px;border-radius:var(--r-card);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,24,41,.75),rgba(10,16,32,.6));
  box-shadow:var(--sh);backdrop-filter:blur(10px);
}
.side-card + .side-card{margin-top:20px}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:3px;height:15px;border-radius:2px;background:var(--brand-500)}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:340px;overflow:auto}
.toc-list a{
  display:block;padding:7px 10px;border-left:2px solid var(--line);font-size:13.5px;
  color:var(--text-mid);line-height:1.6;border-radius:0 8px 8px 0;
}
.toc-list a:hover{color:var(--text-hi);background:rgba(255,255,255,.04)}
.toc-list a.is-current{color:var(--brand-500);border-left-color:var(--brand-500);background:rgba(18,225,196,.08)}
.side-meta{display:flex;flex-direction:column;gap:12px;font-size:13.5px;color:var(--text-mid)}
.side-meta div{display:flex;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.side-meta div:last-child{border-bottom:0;padding-bottom:0}
.side-meta b{color:var(--text-hi);font-weight:600}
.side-links a{display:flex;align-items:center;gap:8px;min-height:40px;font-size:14px;color:var(--text-mid)}
.side-links a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-500);opacity:.7}
.side-links a:hover{color:var(--brand-500)}
.side-sticky{position:sticky;top:104px}

/* 上一篇 / 下一篇 */
.pager{display:grid;grid-template-columns:1fr;gap:16px;margin-top:28px}
@media (min-width:768px){.pager{grid-template-columns:1fr 1fr}}
.pager a{
  display:block;padding:20px 22px;border-radius:var(--r-card);border:1px solid var(--line);
  background:rgba(16,24,41,.5);transition:all .28s var(--ease);
}
.pager a:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-strong)}
.pager span{display:block;font-size:12px;color:var(--text-low);letter-spacing:.08em;margin-bottom:8px}
.pager b{display:block;font-size:16px;color:var(--text-hi);font-weight:600;line-height:1.5}
.pager a:hover b{color:var(--brand-500)}
.pager .next{text-align:right}

.back-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;min-height:44px;
  font-size:14px;color:var(--text-mid);
}
.back-link:hover{color:var(--brand-500)}

/* ============ 相关推荐 ============ */
.related{padding:64px 0 72px;background:var(--ink-800);border-top:1px solid var(--line)}
.sec-head{margin-bottom:34px;max-width:760px}
.sec-head h2{font-size:clamp(23px,3vw,32px);line-height:1.3;margin-bottom:12px}
.sec-head p{color:var(--text-mid);font-size:15.5px}
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.pcard{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-card);
  border:1px solid var(--line);background:rgba(16,24,41,.55);
  box-shadow:var(--sh);transition:all .3s var(--ease);backdrop-filter:blur(10px);
}
.pcard:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-strong)}
.pcard-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--ink-700)}
.pcard-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s ease}
.pcard:hover .pcard-media img{transform:scale(1.04)}
.pcard-media .badge{position:absolute;left:14px;top:14px;background:rgba(5,7,14,.72);backdrop-filter:blur(6px)}
.pcard-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.pcard h3{font-size:17.5px;line-height:1.5;font-weight:600}
.pcard:hover h3{color:var(--brand-500)}
.pcard p{font-size:14.5px;color:var(--text-mid);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pcard time{font-size:12.5px;color:var(--text-low);margin-top:auto}

/* ============ 收尾 CTA ============ */
.cta-section{padding:64px 0 72px}
.cta-card{
  position:relative;overflow:hidden;padding:34px 24px;border-radius:var(--r-lg);
  border:1px solid var(--line-strong);background:
    radial-gradient(560px 260px at 88% 0%,rgba(18,225,196,.16),transparent 70%),
    linear-gradient(180deg,rgba(16,24,41,.86),rgba(10,16,32,.7));
  box-shadow:var(--sh);backdrop-filter:blur(14px);
}
@media (min-width:768px){.cta-card{padding:52px 48px}.cta-section{padding:80px 0 96px}}
.cta-card h2{font-size:clamp(23px,3vw,32px);margin-bottom:12px;max-width:640px}
.cta-card > p{color:var(--text-mid);max-width:640px;font-size:15.5px}
.cta-form{display:grid;grid-template-columns:1fr;gap:14px;margin-top:26px;max-width:560px}
@media (min-width:768px){.cta-form{grid-template-columns:1fr auto}}
.field label{display:block;font-size:13px;color:var(--text-mid);margin-bottom:8px}
.field input{
  width:100%;min-height:48px;padding:0 16px;border-radius:12px;
  background:rgba(5,7,14,.65);border:1px solid var(--line-strong);color:var(--text-hi);
  font-size:15px;transition:all .24s var(--ease);
}
.field input::placeholder{color:var(--text-low)}
.field input:hover{border-color:rgba(18,225,196,.35)}
.field input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(18,225,196,.14)}
.field.is-error input{border-color:var(--err);box-shadow:0 0 0 4px rgba(255,92,108,.12)}
.form-hint{font-size:12.5px;color:var(--text-low);margin-top:12px}
.form-hint.err{color:var(--err)}
.form-hint.ok{color:var(--ok)}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);background:var(--ink-800);padding:56px 0 90px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text-hi)}
.footer-col p{font-size:14px;color:var(--text-mid);line-height:1.85;max-width:42ch}
.footer-links{display:flex;flex-direction:column;gap:4px}
.footer-links a{
  display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:var(--text-mid);
  transition:all .24s var(--ease);
}
.footer-links a:hover{color:var(--brand-500);transform:translateX(4px)}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:13px;color:var(--text-low);
}
.footer-bottom a{color:var(--text-low);border-bottom:1px solid var(--line-strong)}
.footer-bottom a:hover{color:var(--brand-500)}

/* ============ 底部转化条 ============ */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  min-height:64px;padding:10px 18px calc(10px + env(safe-area-inset-bottom));
  background:rgba(10,16,32,.86);border-top:1px solid var(--line-strong);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.sticky-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.sticky-bar p{margin:0;font-size:13.5px;color:var(--text-mid)}
.sticky-bar strong{color:var(--text-hi);font-weight:600}
@media (max-width:520px){
  .sticky-bar{padding:10px 14px calc(10px + env(safe-area-inset-bottom))}
  .sticky-bar p{font-size:12.5px;line-height:1.5}
  .sticky-bar .btn{min-height:42px;padding:0 16px;font-size:13.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --r-card:16px;
  --r-big:20px;
  --r-pill:999px;
  --r-img:12px;
  --sh:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-hover:0 22px 46px -12px rgba(0,0,0,.85);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  padding-bottom:calc(64px + env(safe-area-inset-bottom));
}
body.nav-open{overflow:hidden}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{letter-spacing:-.01em}
a{color:var(--text-hi);text-decoration:none;transition:color .25s var(--ease),background-color .25s var(--ease),border-color .25s var(--ease)}
a:hover{color:var(--brand-500)}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
button,input{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
svg{display:block}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,225,196,.28)}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.wrap{padding:0 32px}}
@media (min-width:1360px){.wrap{max-width:1240px}}

/* ===== dock nav ===== */
.dock-wrap{position:sticky;top:0;z-index:60;padding:20px 20px 0;transition:padding .3s var(--ease)}
.dock-wrap.is-stuck{padding-top:8px}
.dock{
  max-width:1080px;margin:0 auto;display:flex;align-items:center;gap:14px;
  padding:10px 14px;border-radius:var(--r-pill);
  background:rgba(16,24,41,.55);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--sh);
  transition:padding .3s var(--ease),background-color .3s var(--ease),border-color .3s var(--ease);
}
.dock-wrap.is-stuck .dock{padding:6px 12px;background:rgba(10,16,32,.88);border-color:var(--line-strong)}
.dock-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:12px;background:rgba(18,225,196,.1);border:1px solid var(--line-strong);flex:0 0 auto}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.12}
.brand-text b{font-size:15px;font-weight:800}
.brand-text i{font-style:normal;font-size:10px;color:var(--text-low);letter-spacing:.22em}
.dock-menu{display:flex;align-items:center;gap:2px;margin:0 auto}
.dock-menu a{display:flex;align-items:center;min-height:44px;padding:0 13px;border-radius:var(--r-pill);font-size:14px;color:var(--text-mid);white-space:nowrap}
.dock-menu a:hover{color:var(--text-hi);background:rgba(18,225,196,.12)}
.dock-menu a.is-active{color:#03130F;background:var(--brand-500);font-weight:700}
.dock-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-pill);border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--text-mid);transition:all .25s var(--ease)}
.icon-btn svg{width:18px;height:18px}
.icon-btn:hover{color:var(--brand-500);border-color:var(--brand-500);background:rgba(18,225,196,.12)}
.burger{display:none;position:relative;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);background:rgba(255,255,255,.04)}
.burger span{position:absolute;top:21px;left:12px;width:18px;height:2px;background:var(--text-hi);border-radius:2px;transition:transform .25s var(--ease),background-color .25s var(--ease)}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px;transition:transform .25s var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.burger.is-open span{background:transparent}
.burger.is-open span::before{transform:translateY(6px) rotate(45deg)}
.burger.is-open span::after{transform:translateY(-6px) rotate(-45deg)}

.mnav{display:none;position:fixed;left:0;right:0;top:0;z-index:58;padding:92px 20px 30px;background:rgba(5,7,14,.97);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.mnav.is-open{display:block}
.mnav a{display:flex;align-items:center;min-height:52px;padding:0 16px;border-radius:14px;font-size:16px;color:var(--text-mid);border:1px solid transparent}
.mnav a:hover,.mnav a.is-active{color:var(--text-hi);background:rgba(18,225,196,.12);border-color:rgba(18,225,196,.35)}
.mnav .mnav-cta{margin-top:12px;justify-content:center;background:var(--accent-500);color:#200D02;font-weight:700}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:var(--r-pill);border:1px solid transparent;font-size:15px;font-weight:600;transition:all .25s var(--ease)}
.btn svg{width:16px;height:16px}
.btn-primary{background:linear-gradient(180deg,#FF8B47,var(--accent-600));color:#1F0C02;box-shadow:0 12px 30px -8px var(--accent-glow)}
.btn-primary:hover{color:#1F0C02;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 38px -6px var(--accent-glow)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(16,24,41,.5);border-color:var(--line-strong);color:var(--text-hi)}
.btn-ghost:hover{border-color:var(--brand-500);background:rgba(18,225,196,.14);color:var(--text-hi)}
.btn-sm{min-height:44px;padding:0 16px;font-size:14px}

/* ===== page hero ===== */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:52px 0 60px}
.page-hero-bg{position:absolute;inset:0;z-index:0;background-size:cover;background-position:center;opacity:.24;filter:saturate(.85)}
.page-hero::after{content:"";position:absolute;inset:0;z-index:1;background:
  linear-gradient(180deg,rgba(5,7,14,.74) 0%,rgba(5,7,14,.94) 78%,var(--ink-900) 100%),
  linear-gradient(115deg,rgba(18,225,196,.10) 0 26%,transparent 26%)}
.page-hero::before{content:"";position:absolute;inset:0;z-index:2;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:24px 24px}
.page-hero-inner{position:relative;z-index:3}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:20px}
.crumbs a{color:var(--text-low)}
.crumbs a:hover{color:var(--brand-500)}
.crumbs span{opacity:.55}
.crumbs em{font-style:normal;color:var(--text-mid)}
.page-hero h1{font-size:clamp(30px,5.2vw,52px);line-height:1.15;font-weight:800;max-width:22ch}
.page-hero-sub{margin-top:18px;max-width:64ch;color:var(--text-mid);font-size:17px;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.trust-row li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-mid)}
.trust-row svg{width:16px;height:16px;color:var(--brand-500)}
@media (max-width:767px){
  .page-hero{padding:36px 0 44px}
  .hero-actions .btn{width:100%}
}

/* ===== section shell ===== */
.section{padding:56px 0;position:relative}
@media (min-width:768px){.section{padding:96px 0}}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:800px;margin-bottom:36px}
.sec-tag{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.1em;color:var(--brand-500);margin-bottom:14px}
.sec-tag::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand-500)}
.sec-title{font-size:clamp(24px,3.2vw,36px);line-height:1.25;font-weight:700}
.sec-desc{margin-top:14px;color:var(--text-mid);font-size:16px;max-width:62ch}

/* ===== feature grid 1 big + 2 small ===== */
.feat-grid{display:grid;gap:20px}
.feat-stack{display:grid;gap:20px}
@media (min-width:900px){
  .feat-grid{grid-template-columns:1.12fr 1fr;align-items:stretch}
  .feat-stack{grid-template-rows:1fr 1fr}
}
.card{background:rgba(16,24,41,.55);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease)}
.card:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-hover)}
.feat-big{overflow:hidden;display:flex;flex-direction:column}
.feat-big .thumb{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.feat-big .thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s var(--ease)}
.feat-big:hover .thumb img{transform:scale(1.04)}
.feat-body{padding:26px}
@media (min-width:768px){.feat-body{padding:30px}}
.num{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.16em;color:var(--accent-500);font-variant-numeric:tabular-nums}
.card h3{margin-top:10px;font-size:21px;font-weight:700;line-height:1.4;transition:color .25s var(--ease)}
.card:hover h3{color:var(--brand-500)}
.card p{margin-top:12px;color:var(--text-mid);font-size:15px}
.feat-small{display:flex;gap:16px;padding:24px;align-items:flex-start}
.ico{width:44px;height:44px;flex:0 0 auto;display:grid;place-items:center;border-radius:13px;border:1px solid rgba(18,225,196,.3);background:rgba(18,225,196,.09);color:var(--brand-500)}
.ico svg{width:21px;height:21px}
.feat-small h3{font-size:18px;margin-top:6px}
.feat-small p{margin-top:8px;font-size:14.5px}

/* ===== module list ===== */
.mod-list{display:grid;gap:0}
@media (min-width:768px){.mod-list{grid-template-columns:1fr 1fr;column-gap:48px}}
.mod-item{display:flex;gap:16px;padding:24px 0;border-top:1px solid var(--line)}
.mod-item:last-child{border-bottom:1px solid var(--line)}
@media (min-width:768px){.mod-item:nth-last-child(2){border-bottom:1px solid var(--line)}}
.mod-item h3{font-size:17px;font-weight:700}
.mod-item p{margin-top:8px;color:var(--text-mid);font-size:14.5px}
.mod-item .ico{width:40px;height:40px;border-radius:12px}

/* ===== compare table ===== */
.table-wrap{border:1px solid var(--line);border-radius:var(--r-big);overflow:hidden;background:rgba(16,24,41,.45);box-shadow:var(--sh)}
table.cmp{width:100%;border-collapse:collapse;font-size:15px}
.cmp th,.cmp td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.cmp thead th{background:rgba(18,225,196,.07);font-size:14px;font-weight:700;color:var(--text-hi);white-space:nowrap}
.cmp tbody th{font-weight:600;color:var(--text-mid);width:24%}
.cmp tbody td{color:var(--text-mid);font-size:14.5px}
.cmp tbody tr:last-child th,.cmp tbody tr:last-child td{border-bottom:none}
.cmp tbody tr:hover td,.cmp tbody tr:hover th{background:rgba(18,225,196,.05);color:var(--text-hi)}
@media (max-width:767px){
  .table-wrap{border:none;background:transparent;box-shadow:none}
  .cmp thead{display:none}
  .cmp,.cmp tbody,.cmp tr,.cmp th,.cmp td{display:block;width:100%}
  .cmp tr{border:1px solid var(--line);border-radius:var(--r-card);background:rgba(16,24,41,.55);padding:16px 18px;margin-bottom:14px}
  .cmp tbody th{color:var(--brand-500);font-size:15px;padding:0 0 10px;border-bottom:1px solid var(--line)}
  .cmp tbody td{padding:10px 0 0;border:none}
  .cmp tbody td::before{content:attr(data-label);display:block;font-size:12px;letter-spacing:.06em;color:var(--text-low);margin-bottom:3px}
}

/* ===== path block ===== */
.path-grid{display:grid;gap:30px}
@media (min-width:900px){.path-grid{grid-template-columns:1.05fr 1fr;align-items:center;gap:48px}}
.shot{border-radius:var(--r-big);overflow:hidden;border:1px solid var(--line-strong);background:var(--ink-700);box-shadow:var(--sh)}
.shot-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:rgba(5,7,14,.7);border-bottom:1px solid var(--line)}
.shot-bar b{width:8px;height:8px;border-radius:50%;background:var(--line-strong);display:block}
.shot-bar span{margin-left:8px;font-size:12px;color:var(--text-low);letter-spacing:.04em}
.shot img{width:100%;aspect-ratio:16/11;object-fit:cover}
.steps{display:grid;gap:22px}
.step{display:flex;gap:16px}
.step-num{flex:0 0 42px;height:42px;display:grid;place-items:center;border-radius:13px;border:1px solid rgba(255,122,47,.35);background:rgba(255,122,47,.09);color:var(--accent-500);font-weight:800;font-variant-numeric:tabular-nums}
.step h3{font-size:17px;font-weight:700}
.step p{margin-top:6px;color:var(--text-mid);font-size:14.5px}

/* ===== badge strip ===== */
.badge-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;padding:22px;border-radius:var(--r-big);border:1px dashed var(--line-strong);background:rgba(16,24,41,.35)}
.badge{display:inline-flex;align-items:center;gap:8px;min-height:36px;padding:0 15px;border-radius:var(--r-pill);border:1px solid var(--line-strong);background:rgba(255,255,255,.04);color:var(--text-mid);font-size:13px}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--text-low)}

/* ===== faq ===== */
.faq .accordion{margin:0;background:transparent;border:none;border-radius:0}
.faq .accordion-item{border:none;border-top:1px solid var(--line);background:transparent}
.faq .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq .accordion-title{display:block;position:relative;padding:22px 46px 22px 0;background:transparent;border:none;font-size:16px;font-weight:600;color:var(--text-hi);transition:color .25s var(--ease)}
.faq .accordion-title:hover{color:var(--brand-500);background:transparent}
.faq .accordion-title::before{display:none}
.faq .accordion-title::after{content:"+";position:absolute;right:10px;top:50%;transform:translateY(-50%);font-size:20px;line-height:1;color:var(--brand-500);transition:transform .24s var(--ease)}
.faq .accordion-item.is-active .accordion-title::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq .accordion-content{padding:0 46px 22px 0;border:none;background:transparent;color:var(--text-mid);font-size:15px}

/* ===== CTA ===== */
.cta-card{border-radius:var(--r-big);border:1px solid var(--line-strong);background:
  radial-gradient(120% 140% at 100% 0%,rgba(18,225,196,.14) 0%,transparent 55%),
  rgba(16,24,41,.62);
  box-shadow:var(--sh);padding:30px;display:grid;gap:30px}
@media (min-width:900px){.cta-card{grid-template-columns:1.05fr .95fr;padding:48px;align-items:center;gap:44px}}
.cta-card h2{font-size:clamp(24px,3.2vw,34px);line-height:1.3;font-weight:700}
.cta-card p{margin-top:14px;color:var(--text-mid);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.field{display:flex;flex-direction:column;gap:9px}
.field label{font-size:13px;color:var(--text-mid)}
.field input{height:50px;margin:0;border-radius:12px;border:1px solid var(--line-strong);background:rgba(5,7,14,.65);color:var(--text-hi);padding:0 16px;font-size:15px;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.field input::placeholder{color:var(--text-low)}
.field input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(18,225,196,.16)}
.field input.is-invalid{border-color:var(--err);box-shadow:0 0 0 4px rgba(255,92,108,.16)}
.form-row{display:flex;flex-wrap:wrap;gap:12px}
.form-row .field{flex:1 1 240px}
.form-row .btn{flex:0 0 auto}
.form-msg{min-height:20px;font-size:13px;color:var(--brand-500)}
.form-msg.err{color:var(--err)}
@media (max-width:767px){.form-row .btn{width:100%}}

/* ===== footer ===== */
.site-footer{border-top:1px solid var(--line);background:var(--ink-800);padding:56px 0 0}
.footer-grid{display:grid;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.25fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text-hi);margin-bottom:16px}
.footer-col p{color:var(--text-low);font-size:14px;line-height:1.8}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{color:var(--text-mid);font-size:14px;transition:color .25s var(--ease),padding-left .25s var(--ease)}
.footer-links a:hover{color:var(--brand-500);padding-left:6px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;align-items:center;margin-top:44px;padding:22px 0 30px;border-top:1px solid var(--line);font-size:13px;color:var(--text-low)}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--brand-500)}

/* ===== sticky bottom bar ===== */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(10,16,32,.88);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);transition:transform .3s var(--ease),opacity .3s var(--ease)}
.sticky-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
.sbar-inner{max-width:1200px;margin:0 auto;min-height:64px;padding:10px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
@media (min-width:768px){.sbar-inner{padding:10px 32px}}
.sbar-inner p{font-size:14px;color:var(--text-mid)}
.sbar-inner p b{color:var(--text-hi);font-weight:700}
@media (max-width:520px){.sbar-inner p{font-size:13px}.sbar-inner p span{display:none}}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
/* ============ 1. 设计变量 ============ */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --r-card:16px;
  --r-lg:20px;
  --r-img:12px;
  --r-pill:999px;
  --sh:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-hi:0 24px 50px -18px rgba(0,0,0,.85);
  --glass:rgba(16,24,41,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ============ 2. Reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-bottom:86px;
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease),background-color .25s var(--ease);}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px;
  border-radius:8px;
}
button,input,textarea{font:inherit;color:inherit;}
button{border:0;background:none;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;color:var(--text-hi);}
h1{font-size:clamp(30px,5.2vw,54px);line-height:1.15;font-weight:800;}
h2{font-size:clamp(24px,3.2vw,36px);line-height:1.25;font-weight:700;}
h3{font-size:clamp(19px,2vw,22px);line-height:1.4;font-weight:600;}
p{margin:0;}
::selection{background:rgba(18,225,196,.28);color:#fff;}

/* ============ 3. 容器 ============ */
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){ .wrap{padding:0 32px;} }
@media (min-width:1400px){ .wrap{max-width:1280px;} }

.section{padding:56px 0;}
@media (min-width:1024px){ .section{padding:96px 0;} }

.sec-head{max-width:760px;margin-bottom:32px;}
.sec-head h2{margin-bottom:12px;}
.sec-head p{color:var(--text-mid);font-size:16px;max-width:62ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.06em;color:var(--brand-500);
  text-transform:uppercase;margin-bottom:14px;font-weight:600;
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--brand-500);}

/* ============ 4. 浮动 Dock 导航 ============ */
.dock-wrap{
  position:fixed;top:20px;left:0;right:0;z-index:80;
  display:flex;justify-content:center;
  padding:0 16px;pointer-events:none;
}
.dock{
  pointer-events:auto;
  width:100%;max-width:1080px;
  display:flex;align-items:center;gap:14px;
  padding:12px 16px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06);
  transition:padding .3s var(--ease),background-color .3s var(--ease),box-shadow .3s var(--ease);
}
.dock-wrap.is-stuck .dock{
  padding:8px 14px;
  background:rgba(10,16,32,.88);
  box-shadow:0 22px 46px -22px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.06);
}
.dock-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:4px 6px;border-radius:var(--r-pill);}
.brand-mark{width:30px;height:30px;display:grid;place-items:center;flex:0 0 30px;}
.brand-mark svg{width:100%;height:100%;}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-text b{font-size:15px;font-weight:800;letter-spacing:.02em;}
.brand-text i{font-style:normal;font-size:11px;color:var(--brand-500);letter-spacing:.18em;}
.dock-menu{display:none;align-items:center;gap:4px;margin:0 auto;}
.dock-menu a{
  display:inline-flex;align-items:center;min-height:38px;
  padding:0 13px;border-radius:var(--r-pill);
  font-size:14px;color:var(--text-mid);white-space:nowrap;
}
.dock-menu a:hover{color:var(--text-hi);background:rgba(18,225,196,.1);}
.dock-menu a.is-active{color:var(--ink-900);background:var(--brand-500);font-weight:700;}
.dock-actions{display:flex;align-items:center;gap:8px;margin-left:auto;}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-pill);
  display:grid;place-items:center;color:var(--text-mid);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:all .25s var(--ease);
}
.icon-btn svg{width:19px;height:19px;}
.icon-btn:hover{color:var(--brand-500);border-color:rgba(18,225,196,.5);background:rgba(18,225,196,.1);}
.burger{
  width:44px;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  display:grid;place-items:center;gap:5px;padding:0 12px;
}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-hi);position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--text-hi);
  transition:transform .25s var(--ease);
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
@media (min-width:1024px){
  .dock{gap:20px;padding:12px 20px;}
  .dock-menu{display:flex;}
  .burger{display:none;}
}

/* 移动端下拉面板 */
.mnav{
  position:fixed;top:84px;left:16px;right:16px;z-index:75;
  display:none;
  border-radius:var(--r-lg);
  background:rgba(10,16,32,.94);
  border:1px solid var(--line-strong);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  box-shadow:var(--sh-hi);
  padding:14px;
}
body.nav-open .mnav{display:block;animation:dropIn .26s var(--ease);}
@keyframes dropIn{from{opacity:0;transform:translateY(-10px);}to{opacity:1;transform:translateY(0);}}
.mnav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;border-radius:12px;
  font-size:15px;color:var(--text-mid);
}
.mnav a+a{margin-top:4px;}
.mnav a:hover{background:rgba(255,255,255,.05);color:var(--text-hi);}
.mnav a.is-active{background:var(--brand-500);color:var(--ink-900);font-weight:700;}
@media (min-width:1024px){ .mnav{display:none !important;} }

/* ============ 5. 按钮 / 标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),filter .25s var(--ease);
}
.btn:active{transform:translateY(0) scale(.99);}
.btn-primary{
  background:linear-gradient(135deg,var(--accent-500),var(--accent-600));
  color:#160802;
  box-shadow:0 12px 30px -8px var(--accent-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 20px 44px -10px var(--accent-glow);}
.btn-ghost{
  background:rgba(16,24,41,.6);border-color:var(--line-strong);color:var(--text-hi);
}
.btn-ghost:hover{background:rgba(18,225,196,.14);border-color:var(--brand-500);color:var(--brand-500);transform:translateY(-2px);}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--brand-500);
  background:rgba(18,225,196,.12);border:1px solid rgba(18,225,196,.32);
}
.tag-accent{color:var(--accent-500);background:rgba(255,122,47,.12);border-color:rgba(255,122,47,.34);}
.tag-plain{color:var(--text-mid);background:rgba(255,255,255,.04);border-color:var(--line-strong);}

/* ============ 6. 页面头部 ============ */
.page-head{
  position:relative;overflow:hidden;
  padding:132px 0 48px;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:"";position:absolute;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:24px 24px;
  -webkit-mask-image:radial-gradient(120% 90% at 20% 0%,#000 20%,transparent 78%);
  mask-image:radial-gradient(120% 90% at 20% 0%,#000 20%,transparent 78%);
  pointer-events:none;
}
.page-head::after{
  content:"";position:absolute;top:-140px;right:-120px;width:560px;height:400px;
  background:linear-gradient(115deg,rgba(18,225,196,.16),rgba(18,225,196,0) 62%);
  transform:skewX(-14deg);pointer-events:none;
}
.page-head .wrap{position:relative;z-index:2;}
@media (min-width:1024px){ .page-head{padding:158px 0 68px;} }

.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:18px;}
.crumb a{color:var(--text-low);}
.crumb a:hover{color:var(--brand-500);}
.crumb span.sep{color:rgba(255,255,255,.22);}
.crumb strong{color:var(--text-mid);font-weight:500;}

.page-head h1{margin-bottom:16px;max-width:900px;}
.page-head h1 em{font-style:normal;color:var(--brand-500);}
.page-lead{color:var(--text-mid);font-size:16.5px;max-width:70ch;}
.head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}

/* 帮助搜索 */
.help-search{margin-top:26px;max-width:620px;}
.help-search label{display:block;font-size:13.5px;color:var(--text-mid);margin-bottom:8px;}
.search-row{display:flex;gap:10px;flex-wrap:wrap;}
.search-row input{
  flex:1 1 220px;min-height:48px;padding:0 16px;
  border-radius:12px;border:1px solid var(--line-strong);
  background:rgba(10,16,32,.75);color:var(--text-hi);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background-color .25s var(--ease);
}
.search-row input::placeholder{color:var(--text-low);}
.search-row input:focus{
  outline:none;border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(18,225,196,.16);
  background:rgba(10,16,32,.95);
}
.form-msg{font-size:13.5px;margin-top:10px;color:var(--brand-500);min-height:20px;}
.form-msg.is-err{color:var(--err);}

/* ============ 7. 两栏 FAQ 布局 ============ */
.faq-layout{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:296px 1fr;gap:40px;align-items:start;}
}
.side{display:flex;flex-direction:column;gap:16px;}
@media (min-width:1024px){
  .side{position:sticky;top:104px;}
}
.side-card{
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06);
  padding:20px;
}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:3px;height:15px;border-radius:2px;background:var(--brand-500);}
.anchor-list{display:flex;flex-direction:column;gap:4px;}
.anchor-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:44px;padding:0 12px;border-radius:12px;
  font-size:14px;color:var(--text-mid);
  border:1px solid transparent;
}
.anchor-list a:hover{color:var(--text-hi);background:rgba(18,225,196,.1);border-color:rgba(18,225,196,.28);}
.anchor-list a b{
  font-size:12px;font-weight:600;color:var(--text-low);
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:1px 9px;
}
.side-note{font-size:13.5px;color:var(--text-mid);line-height:1.75;}
.side-note strong{color:var(--brand-500);font-weight:600;}
.side-card .btn{margin-top:16px;}

/* 移动端锚点横滑 */
@media (max-width:1023px){
  .side-card{padding:16px;}
  .anchor-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;-webkit-overflow-scrolling:touch;}
  .anchor-list a{flex:0 0 auto;border:1px solid var(--line-strong);background:rgba(255,255,255,.03);}
}

/* ============ 8. FAQ 分组 ============ */
.faq-group{margin-bottom:36px;scroll-margin-top:110px;}
.faq-group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;}
.group-idx{
  flex:0 0 auto;font-size:13px;font-weight:700;color:var(--accent-500);
  font-variant-numeric:tabular-nums;letter-spacing:.06em;padding-top:6px;
}
.group-head h2{font-size:clamp(20px,2.4vw,26px);}
.group-head p{color:var(--text-mid);font-size:14.5px;margin-top:6px;max-width:62ch;}

.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:rgba(16,24,41,.42);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .25s var(--ease),background-color .25s var(--ease),transform .25s var(--ease);
}
.faq-item:hover{border-color:rgba(18,225,196,.4);background:rgba(16,24,41,.62);}
.faq-item[open]{
  border-color:rgba(18,225,196,.42);
  background:rgba(16,24,41,.72);
  box-shadow:var(--sh);
}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:16px 20px;
  cursor:pointer;list-style:none;
  font-size:15.5px;font-weight:600;color:var(--text-hi);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::marker{content:"";}
.faq-item summary:hover{color:var(--brand-500);}
.faq-ico{position:relative;flex:0 0 22px;width:22px;height:22px;border-radius:50%;border:1px solid var(--line-strong);}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;background:var(--brand-500);border-radius:2px;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-ico::before{left:5px;right:5px;top:10px;height:2px;}
.faq-ico::after{top:5px;bottom:5px;left:10px;width:2px;}
.faq-item[open] .faq-ico::after{transform:rotate(90deg);opacity:0;}
.faq-a{padding:0 20px 20px;border-top:1px solid var(--line);}
.faq-a p{color:var(--text-mid);font-size:15px;padding-top:16px;max-width:70ch;}
.faq-a p+p{margin-top:10px;}
.faq-a ul{margin-top:10px;display:flex;flex-direction:column;gap:8px;}
.faq-a li{position:relative;padding-left:18px;color:var(--text-mid);font-size:14.5px;}
.faq-a li::before{content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);}

/* ============ 9. 未解决 CTA 卡 ============ */
.help-cta{
  margin-top:12px;
  display:grid;grid-template-columns:1fr;gap:20px;
  border-radius:var(--r-lg);
  border:1px solid rgba(18,225,196,.3);
  background:linear-gradient(135deg,rgba(18,225,196,.1),rgba(16,24,41,.72) 55%);
  padding:26px;
  box-shadow:var(--sh);
}
@media (min-width:768px){
  .help-cta{grid-template-columns:1fr auto;align-items:center;padding:32px;}
}
.help-cta h3{margin-bottom:8px;}
.help-cta p{color:var(--text-mid);font-size:14.5px;max-width:58ch;}

/* ============ 10. 图 + 上下文 ============ */
.media-card{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh);
  background:linear-gradient(140deg,var(--ink-700),var(--ink-900));
}
.media-card img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.media-card:hover img{transform:scale(1.04);}
.media-frame{position:relative;}
.media-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,14,0) 40%,rgba(5,7,14,.72));
  pointer-events:none;
}
.browser-bar{
  display:flex;align-items:center;gap:6px;
  padding:10px 14px;background:rgba(10,16,32,.9);border-bottom:1px solid var(--line);
}
.browser-bar i{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.2);display:block;}
.browser-bar i:first-child{background:var(--accent-500);}
.browser-bar i:nth-child(2){background:var(--warn);}
.browser-bar i:nth-child(3){background:var(--ok);}
.browser-bar span{margin-left:8px;font-size:12px;color:var(--text-low);}

/* ============ 11. 概览提示条 ============ */
.quick-strip{display:grid;grid-template-columns:1fr;gap:14px;}
@media (min-width:768px){ .quick-strip{grid-template-columns:repeat(3,1fr);} }
.quick-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:18px;border-radius:var(--r-card);
  border:1px solid var(--line);background:rgba(255,255,255,.02);
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.quick-item:hover{border-color:rgba(18,225,196,.38);transform:translateY(-3px);}
.quick-item .qi{
  flex:0 0 34px;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;color:var(--brand-500);
  background:rgba(18,225,196,.1);border:1px solid rgba(18,225,196,.26);
}
.quick-item .qi svg{width:17px;height:17px;}
.quick-item h3{font-size:15px;margin-bottom:4px;}
.quick-item p{font-size:13.5px;color:var(--text-mid);}

/* ============ 12. 数字条 ============ */
.stats{padding:28px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stat{padding:14px 0;}
.stat b{
  display:block;font-size:clamp(26px,3.6vw,38px);font-weight:800;
  color:var(--accent-500);font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat span{font-size:13.5px;color:var(--text-mid);}

/* ============ 13. 收尾 CTA + 表单 ============ */
.final{
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh),inset 0 1px 0 rgba(255,255,255,.06);
  padding:28px 22px;
  display:grid;grid-template-columns:1fr;gap:26px;
}
@media (min-width:1024px){ .final{grid-template-columns:1.05fr .95fr;padding:44px;gap:44px;align-items:center;} }
.final h2{margin-bottom:14px;}
.final p{color:var(--text-mid);font-size:15.5px;max-width:56ch;}
.final-points{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.final-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-mid);}
.final-points li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;background:var(--brand-500);}
.form-card{border-radius:var(--r-card);border:1px solid var(--line);background:rgba(10,16,32,.7);padding:22px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--text-mid);margin-bottom:8px;}
.field input,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;
  border-radius:12px;border:1px solid var(--line-strong);
  background:rgba(5,7,14,.7);color:var(--text-hi);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.field textarea{min-height:92px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-low);}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);
  box-shadow:0 0 0 4px rgba(18,225,196,.16);
}
.field.is-err input,.field.is-err textarea{border-color:var(--err);}
.field .err-txt{display:none;font-size:12.5px;color:var(--err);margin-top:6px;}
.field.is-err .err-txt{display:block;}
.form-tip{font-size:12.5px;color:var(--text-low);margin-top:12px;}

/* ============ 14. 页脚 ============ */
.site-footer{
  margin-top:64px;
  border-top:1px solid var(--line-strong);
  background:var(--ink-800);
  padding:48px 0 26px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;} }
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:.02em;}
.footer-col p{font-size:13.5px;color:var(--text-mid);max-width:42ch;}
.footer-links{display:flex;flex-direction:column;gap:2px;}
.footer-links a{
  display:inline-flex;align-items:center;min-height:40px;
  font-size:14px;color:var(--text-mid);
  transition:color .25s var(--ease),padding-left .25s var(--ease);
}
.footer-links a:hover{color:var(--brand-500);padding-left:6px;}
.footer-bottom{
  margin-top:36px;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(--text-low);
}
.footer-bottom a{color:var(--text-low);}
.footer-bottom a:hover{color:var(--brand-500);}

/* ============ 15. 底部固定转化条 ============ */
.convert-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  min-height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 20px calc(10px + env(safe-area-inset-bottom));
  background:rgba(10,16,32,.82);
  border-top:1px solid var(--line-strong);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .35s var(--ease),opacity .35s var(--ease);
}
.convert-bar span{font-size:13.5px;color:var(--text-mid);line-height:1.5;}
.convert-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none;}
@media (max-width:520px){
  .convert-bar span{max-width:56%;font-size:12.5px;}
}

/* ============ 16. 动效偏好 ============ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --ink-900:#05070E;
  --ink-800:#0A1020;
  --ink-700:#101829;
  --brand-500:#12E1C4;
  --brand-600:#05B79E;
  --brand-glow:rgba(18,225,196,.42);
  --accent-500:#FF7A2F;
  --accent-600:#E85F14;
  --accent-glow:rgba(255,122,47,.5);
  --text-hi:#F2F7FF;
  --text-mid:#A8B6CE;
  --text-low:#6E7C96;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --ok:#35D07F;
  --warn:#FFC53D;
  --err:#FF5C6C;
  --r-card:16px;
  --r-lg:20px;
  --r-img:12px;
  --r-input:12px;
  --sh:0 18px 40px -18px rgba(0,0,0,.75);
  --sh-hover:0 12px 42px -14px rgba(0,0,0,.85),0 0 0 1px rgba(18,225,196,.3);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-bottom:calc(72px + env(safe-area-inset-bottom));
  background:var(--ink-900);
  color:var(--text-hi);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--text-hi);text-decoration:none;transition:color .25s var(--ease)}
a:hover{color:var(--brand-500)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.25}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent-500);color:#0a0a0a;padding:10px 16px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}
.wrap{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.wrap{padding:0 32px}}
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.band{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.08em;color:var(--brand-500);text-transform:none}
.eyebrow::before{content:"";width:3px;height:14px;background:var(--brand-500);border-radius:2px}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;margin:14px 0 12px}
.sec-head p{color:var(--text-mid);line-height:1.85}
/* ===== Dock ===== */
.dock-wrap{position:sticky;top:0;z-index:60;padding:18px 16px 0;transition:padding .28s var(--ease)}
.dock-wrap::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--ink-900) 52%,rgba(5,7,14,0));opacity:0;transition:opacity .28s var(--ease);pointer-events:none}
.dock-wrap.is-scrolled::before{opacity:1}
.dock-wrap.is-tight{padding-top:8px}
.dock{
  position:relative;
  max-width:1080px;margin:0 auto;
  display:flex;align-items:center;gap:16px;
  padding:10px 14px;
  border-radius:999px;
  background:rgba(16,24,41,.55);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 16px 34px -20px rgba(0,0,0,.9);
  transition:padding .28s var(--ease),background .28s var(--ease);
}
.dock-wrap.is-tight .dock{padding:6px 12px;background:rgba(16,24,41,.78)}
.dock-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;border:1px solid var(--line-strong);background:rgba(18,225,196,.08)}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:15px;font-weight:700;letter-spacing:.02em}
.brand-text i{font-style:normal;font-size:11px;color:var(--brand-500);letter-spacing:.14em}
.dock-menu{display:none;align-items:center;gap:2px;flex:1 1 auto;justify-content:center}
.dock-menu a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:999px;font-size:14px;color:var(--text-mid);white-space:nowrap;transition:color .22s var(--ease),background .22s var(--ease)}
.dock-menu a:hover{color:var(--text-hi);background:rgba(255,255,255,.06)}
.dock-menu a.is-active{color:#041613;background:var(--brand-500);font-weight:600}
.dock-menu a.is-active:hover{color:#041613;background:var(--brand-600)}
.dock-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{width:44px;height:44px;display:none;place-items:center;border-radius:999px;border:1px solid var(--line);color:var(--text-mid);transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease)}
.icon-btn svg{width:18px;height:18px}
.icon-btn:hover{color:var(--brand-500);border-color:var(--brand-500);background:rgba(18,225,196,.1)}
.burger{width:44px;height:44px;display:grid;place-items:center;border-radius:999px;border:1px solid var(--line)}
.burger span{position:relative;width:18px;height:2px;background:var(--text-hi);border-radius:2px;transition:background .2s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px;transition:transform .24s var(--ease)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.burger[aria-expanded="true"] span{background:transparent}
.burger[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.burger[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}
.mnav{position:fixed;top:80px;left:12px;right:12px;z-index:70;padding:16px;border-radius:var(--r-lg);background:rgba(10,16,32,.92);border:1px solid var(--line-strong);backdrop-filter:blur(16px) saturate(120%);box-shadow:0 24px 50px -20px rgba(0,0,0,.9)}
.mnav[hidden]{display:none}
.mnav nav{display:flex;flex-direction:column;gap:4px}
.mnav a{display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:12px;font-size:15px;color:var(--text-mid)}
.mnav a:hover,.mnav a.is-active{color:var(--brand-500);background:rgba(18,225,196,.1)}
.mnav .btn{margin-top:10px;justify-content:center}
@media (min-width:900px){
  .dock-menu{display:flex}
  .icon-btn{display:grid}
  .burger{display:none}
  .mnav{display:none!important}
}
/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease)}
.btn-primary{background:var(--accent-500);color:#1a0a02;box-shadow:0 12px 30px -8px var(--accent-glow)}
.btn-primary:hover{background:#ff8b4a;color:#1a0a02;transform:translateY(-2px);box-shadow:0 18px 42px -8px var(--accent-glow),0 0 0 1px rgba(255,122,47,.35)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--line-strong);color:var(--text-hi);background:rgba(16,24,41,.5)}
.btn-ghost:hover{border-color:var(--brand-500);background:rgba(18,225,196,.14);color:var(--text-hi);transform:translateY(-2px)}
.btn-sm{min-height:44px;padding:0 18px;font-size:14px}
/* ===== Page hero ===== */
.page-hero{position:relative;overflow:hidden;padding:56px 0 48px;background:var(--ink-900);border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.03) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.03) 0 1px,transparent 1px 24px);
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(560px 320px at 86% -10%,rgba(18,225,196,.18),transparent 70%),
    linear-gradient(115deg,rgba(18,225,196,.08) 0 36%,transparent 36%);
}
.page-hero .wrap{position:relative;z-index:1}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-low);margin-bottom:22px}
.crumbs a{color:var(--text-low);min-height:24px;display:inline-flex;align-items:center}
.crumbs a:hover{color:var(--brand-500)}
.crumbs span.sep{color:rgba(255,255,255,.22)}
.page-hero h1{font-size:clamp(30px,4.6vw,48px);font-weight:800;margin:14px 0 16px;max-width:18ch}
.page-hero .lead{max-width:62ch;color:var(--text-mid);font-size:17px}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-facts li{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:rgba(16,24,41,.5);font-size:14px;color:var(--text-mid)}
.hero-facts svg{width:16px;height:16px;color:var(--brand-500);flex:0 0 auto}
/* ===== Zigzag ===== */
.zig{display:grid;gap:26px;align-items:center;padding:34px 0;border-top:1px solid var(--line)}
.zig:first-of-type{border-top:0;padding-top:0}
.zig-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-strong);background:var(--ink-700);box-shadow:var(--sh)}
.zig-media img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .4s var(--ease)}
.zig-media:hover img{transform:scale(1.04)}
.zig-media .corner{position:absolute;top:12px;left:12px;padding:5px 12px;border-radius:999px;font-size:12px;color:#041613;background:var(--brand-500);font-weight:700}
.zig-num{font-size:13px;letter-spacing:.14em;color:var(--accent-500);font-weight:700}
.zig h3{font-size:clamp(20px,2.4vw,24px);font-weight:700;margin:10px 0 12px}
.zig p.desc{color:var(--text-mid);max-width:62ch}
.zig-points{margin-top:18px;display:grid;gap:10px}
.zig-points li{position:relative;padding-left:20px;color:var(--text-mid);font-size:15px}
.zig-points li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 3px rgba(18,225,196,.14)}
@media (min-width:900px){
  .zig{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;padding:48px 0}
  .zig--flip .zig-media{order:2}
  .zig--flip .zig-body{order:1}
}
/* ===== Device cards ===== */
.device-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:640px){.device-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.device-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.device-card{padding:24px;border-radius:var(--r-card);border:1px solid var(--line);background:var(--ink-700);box-shadow:var(--sh);transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease)}
.device-card:hover{transform:translateY(-4px);border-color:rgba(18,225,196,.4);box-shadow:var(--sh-hover)}
.device-card .d-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;border:1px solid var(--line-strong);background:rgba(18,225,196,.08);color:var(--brand-500);margin-bottom:16px}
.device-card .d-icon svg{width:20px;height:20px}
.device-card h3{font-size:18px;font-weight:700;margin-bottom:12px}
.device-card dl{margin:0;display:grid;gap:8px}
.device-card dt{font-size:12px;color:var(--text-low);letter-spacing:.06em}
.device-card dd{margin:0;font-size:14px;color:var(--text-mid)}
.device-card:hover h3{color:var(--brand-500)}
/* ===== Tips ===== */
.tips-layout{display:grid;gap:32px}
@media (min-width:960px){.tips-layout{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:start}}
.tips-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--sh)}
.tips-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.tips-list{display:grid;gap:14px}
.tips-list li{padding:20px 22px;border-radius:var(--r-card);border:1px solid var(--line);background:rgba(16,24,41,.55);transition:border-color .26s var(--ease),transform .26s var(--ease)}
.tips-list li:hover{border-color:rgba(18,225,196,.38);transform:translateY(-3px)}
.tips-list strong{display:block;font-size:16px;margin-bottom:6px}
.tips-list span{color:var(--text-mid);font-size:14px}
/* ===== Mini cards ===== */
.mini-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:768px){.mini-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.mini-card{padding:24px 22px;border-radius:var(--r-card);border:1px dashed var(--line-strong);background:rgba(16,24,41,.4);transition:border-color .26s var(--ease),background .26s var(--ease)}
.mini-card:hover{border-color:var(--brand-500);background:rgba(18,225,196,.07)}
.mini-card .m-icon{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:rgba(255,122,47,.14);color:var(--accent-500);margin-bottom:14px}
.mini-card .m-icon svg{width:18px;height:18px}
.mini-card h3{font-size:16px;font-weight:600;margin-bottom:8px}
.mini-card p{font-size:14px;color:var(--text-mid)}
/* ===== CTA ===== */
.cta-card{position:relative;overflow:hidden;padding:32px 24px;border-radius:var(--r-lg);border:1px solid var(--line-strong);background:rgba(16,24,41,.6);backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--sh)}
@media (min-width:768px){.cta-card{padding:48px 44px}}
.cta-card::after{content:"";position:absolute;right:-80px;top:-90px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(18,225,196,.2),transparent 70%);pointer-events:none}
.cta-inner{position:relative;z-index:1;display:grid;gap:28px}
@media (min-width:960px){.cta-inner{grid-template-columns:minmax(0,6fr) minmax(0,5fr);align-items:center;gap:48px}}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:700;margin-bottom:12px}
.cta-inner p{color:var(--text-mid);max-width:52ch}
.cta-form{padding:24px;border-radius:var(--r-card);border:1px solid var(--line);background:rgba(5,7,14,.55)}
.cta-form label{display:block;font-size:14px;color:var(--text-mid);margin-bottom:10px}
.field-row{display:flex;flex-direction:column;gap:12px}
@media (min-width:560px){.field-row{flex-direction:row}}
.cta-form input{flex:1 1 auto;min-height:48px;padding:0 16px;border-radius:var(--r-input);border:1px solid var(--line-strong);background:rgba(10,16,32,.9);color:var(--text-hi);transition:border-color .24s var(--ease),box-shadow .24s var(--ease)}
.cta-form input::placeholder{color:var(--text-low)}
.cta-form input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(18,225,196,.18)}
.cta-form.has-error input{border-color:var(--err);box-shadow:0 0 0 3px rgba(255,92,108,.16)}
.form-msg{margin-top:12px;font-size:13px;color:var(--text-low);min-height:20px}
.cta-form.has-error .form-msg{color:var(--err)}
.cta-form.is-ok .form-msg{color:var(--ok)}
/* ===== Footer ===== */
.site-footer{margin-top:64px;background:var(--ink-800);border-top:1px solid var(--line-strong)}
.footer-grid{display:grid;gap:32px;padding:56px 0 32px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text-hi)}
.footer-col p{color:var(--text-mid);font-size:14px;max-width:46ch}
.footer-links{display:flex;flex-direction:column;gap:2px}
.footer-links a{display:inline-flex;align-items:center;min-height:40px;font-size:14px;color:var(--text-mid);transition:color .22s var(--ease),padding-left .22s var(--ease)}
.footer-links a:hover{color:var(--brand-500);padding-left:6px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--text-low)}
.footer-bottom a{color:var(--text-low)}
.footer-bottom a:hover{color:var(--brand-500)}
/* ===== Sticky bar ===== */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:65;padding-bottom:env(safe-area-inset-bottom);background:rgba(10,16,32,.86);border-top:1px solid var(--line-strong);backdrop-filter:blur(14px) saturate(120%);transition:transform .3s var(--ease),opacity .3s var(--ease)}
.sticky-inner{display:flex;align-items:center;gap:16px;justify-content:space-between;min-height:64px;padding-top:8px;padding-bottom:8px}
.sticky-inner p{font-size:14px;color:var(--text-mid);margin:0}
.sticky-bar.is-hidden{transform:translateY(110%);opacity:0;pointer-events:none}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}