/* roulang page: index */
:root{
  --bg-0:#060F16;
  --bg-1:#0A1A24;
  --bg-2:#0E2230;
  --bg-3:#122C3C;
  --line:rgba(255,255,255,.10);
  --line-soft:rgba(255,255,255,.06);
  --line-strong:rgba(23,198,174,.38);
  --text-1:#EAF4F8;
  --text-2:#A9BEC9;
  --text-3:#6E8794;
  --brand:#17C6AE;
  --brand-deep:#0E8F80;
  --sub:#4C8DE0;
  --accent:#F2B23E;
  --warn:#E86A5B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:24px;
  --r-pill:999px;
  --shadow-1:0 1px 0 rgba(255,255,255,.06) inset;
  --shadow-2:0 12px 32px -12px rgba(0,0,0,.55);
  --shadow-3:0 0 0 1px rgba(23,198,174,.28),0 14px 40px -14px rgba(23,198,174,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --glass-bg:rgba(255,255,255,.045);
  --glass-line:1px solid rgba(255,255,255,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(23,198,174,.10), transparent 62%),
    radial-gradient(900px 480px at 6% 4%, rgba(76,141,224,.10), transparent 60%),
    var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);}
a:hover{color:var(--brand);}
p{margin:0 0 1.1em;}
h1,h2,h3,h4,h5{margin:0;color:var(--text-1);font-weight:700;letter-spacing:-.01em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(23,198,174,.28);color:#fff;}

.num{font-family:Inter,"Segoe UI",system-ui,sans-serif;font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

.row{max-width:none;margin-left:-12px;margin-right:-12px;}
.row .column,.row .columns{padding-left:12px;padding-right:12px;float:none;}
.row::before,.row::after{display:none;}

.section{padding:96px 0;position:relative;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--brand);
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(23,198,174,.10);border:1px solid rgba(23,198,174,.26);
  margin-bottom:18px;text-transform:uppercase;
}
.section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.25;margin-bottom:14px;}
.section-head p{color:var(--text-2);font-size:16px;max-width:640px;}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,15,22,.78);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line-soft);
  transition:background .2s var(--ease);
}
.header-inner{
  display:flex;align-items:center;gap:24px;
  min-height:76px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;text-decoration:none;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(23,198,174,.22),rgba(76,141,224,.18));
  border:1px solid rgba(23,198,174,.34);
  color:var(--brand);font-size:18px;
  box-shadow:var(--shadow-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;color:var(--text-1);letter-spacing:.04em;font-weight:700;}
.brand-text span{font-size:11px;color:var(--text-3);letter-spacing:.24em;}
.brand:hover .brand-text strong{color:var(--brand);}

.nav-search{flex:1 1 auto;max-width:460px;min-width:220px;}
.search-form{position:relative;display:flex;align-items:center;height:48px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--line);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);}
.search-form:hover{border-color:rgba(23,198,174,.26);}
.search-form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,198,174,.14);}
.search-form .fa-magnifying-glass{position:absolute;left:18px;font-size:15px;color:var(--text-3);pointer-events:none;}
.search-form input[type="text"]{
  flex:1 1 auto;width:100%;height:100%;margin:0;padding:0 104px 0 46px;
  background:transparent;border:0;box-shadow:none;border-radius:var(--r-pill);
  color:var(--text-1);font-size:15px;line-height:48px;
}
.search-form input[type="text"]::placeholder{color:var(--text-3);}
.search-form input[type="text"]:focus{box-shadow:none;background:transparent;}
.search-form button{
  position:absolute;right:5px;top:5px;height:38px;padding:0 18px;
  border:0;border-radius:var(--r-pill);cursor:pointer;
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;font-size:14px;font-weight:600;
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.search-form button:hover{filter:brightness(1.07);transform:translateY(-1px);}

.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;flex-shrink:0;}
.nav-links a{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--brand);transition:width .24s var(--ease);
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after{width:100%;}
.nav-links a.is-active{color:var(--brand);font-weight:600;}
.nav-links a.is-active::after{width:100%;height:2px;}
.nav-cta{height:42px;padding:0 20px;font-size:14px;}

.burger{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text-1);font-size:17px;cursor:pointer;align-items:center;justify-content:center;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.burger:hover{border-color:var(--line-strong);color:var(--brand);}

.mobile-search{display:none;padding:0 0 14px;}
.drawer{display:none;padding:8px 0 22px;border-top:1px solid var(--line-soft);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:16px;}
.drawer-nav a{
  display:flex;justify-content:space-between;align-items:center;
  padding:14px 4px;font-size:16px;color:var(--text-2);
  border-bottom:1px solid var(--line-soft);
}
.drawer-nav a.is-active{color:var(--brand);}
.drawer-nav a i{font-size:12px;color:var(--text-3);}
.drawer .btn{width:100%;}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;letter-spacing:.02em;text-decoration:none;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),filter .2s var(--ease);
}
.btn-primary{background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);color:#04181A;box-shadow:var(--shadow-3);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);color:#04181A;box-shadow:0 0 0 1px rgba(23,198,174,.34),0 18px 46px -14px rgba(23,198,174,.45);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:42px;padding:0 20px;font-size:14px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--brand);position:relative;padding-bottom:3px;
  background-image:linear-gradient(var(--brand),var(--brand));
  background-repeat:no-repeat;background-position:0 100%;background-size:0 2px;
  transition:background-size .24s var(--ease),color .2s var(--ease);
}
.link-arrow:hover{background-size:100% 2px;color:var(--brand);}
.link-arrow i{transition:transform .24s var(--ease);}
.link-arrow:hover i{transform:translateX(3px);}

/* ---------------- Hero ---------------- */
.hero{padding:64px 0 40px;}
.hero-panel{
  position:relative;
  border-radius:var(--r-xl);
  background:var(--glass-bg);
  border:var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-2);
  padding:56px 48px;
}
.hero .row{display:flex;flex-wrap:wrap;align-items:center;}
.hero-copy h1{
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.15;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero-copy h1 em{font-style:normal;color:var(--brand);}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text-2);max-width:520px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:12px 26px;padding-top:22px;border-top:1px solid var(--line-soft);}
.hero-trust span{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);}
.hero-trust i{color:var(--brand);font-size:13px;}
.hero-figure{
  margin:0;position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(23,198,174,.22);
  box-shadow:var(--shadow-2);
}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,15,22,.12) 0%,rgba(6,15,22,.62) 100%);
}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}

/* ---------------- Story / principle ---------------- */
.story .row{display:flex;flex-wrap:wrap;}
.story-side{display:flex;gap:18px;align-items:flex-start;padding-top:6px;}
.story-rail{display:flex;flex-direction:column;align-items:center;gap:14px;}
.story-rail span{
  writing-mode:vertical-rl;letter-spacing:.34em;font-size:12px;color:var(--text-3);
}
.story-rail i{display:block;width:1px;height:76px;background:linear-gradient(180deg,var(--brand),transparent);}
.story-lead{font-size:17px;line-height:1.9;color:var(--text-2);margin-bottom:8px;}
.story-rule{display:block;width:60px;height:3px;border-radius:2px;background:var(--accent);margin:26px 0 34px;}
.story-list{display:flex;flex-direction:column;gap:28px;}
.story-item{display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start;}
.story-item .idx{
  font-family:Inter,"Segoe UI",system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:20px;font-weight:700;color:var(--brand);
  padding-top:2px;letter-spacing:.02em;
}
.story-item h3{font-size:20px;line-height:1.4;margin-bottom:8px;}
.story-item p{margin:0;font-size:15px;line-height:1.8;color:var(--text-2);}

/* ---------------- Timeline ---------------- */
.timeline{position:relative;padding-left:34px;}
.timeline::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--brand),rgba(23,198,174,.06));}
.tl-item{position:relative;padding:0 0 30px 0;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--bg-0);border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(23,198,174,.12);
}
.tl-item h3{font-size:19px;margin-bottom:6px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tl-item p{margin:0 0 10px;font-size:15px;line-height:1.8;color:var(--text-2);}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1;padding:7px 12px;border-radius:var(--r-sm);
  background:var(--bg-3);color:var(--sub);border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.tag:hover{background:rgba(23,198,174,.10);color:var(--brand);border-color:rgba(23,198,174,.30);}

/* ---------------- Feature cards ---------------- */
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:stretch;}
.card{
  position:relative;display:flex;flex-direction:column;
  border-radius:var(--r-lg);background:var(--glass-bg);border:var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:0 0 0 1px rgba(23,198,174,.18),0 16px 40px -18px rgba(23,198,174,.32);}
.card-media{overflow:hidden;position:relative;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .34s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.card-body h3{font-size:20px;line-height:1.4;transition:color .2s var(--ease);}
.card:hover .card-body h3{color:var(--brand);}
.card-body p{margin:0;font-size:15px;line-height:1.75;color:var(--text-2);}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:8px;}
.card-foot time{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.chip{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:7px 12px;
  border-radius:var(--r-pill);background:var(--bg-3);color:var(--sub);
  align-self:flex-start;transition:background .2s var(--ease),color .2s var(--ease);
}
.card:hover .chip{background:rgba(23,198,174,.12);color:var(--brand);}
.f-a{grid-column:1 / 7;grid-row:1 / 3;}
.f-a .card-media{flex:1 1 auto;min-height:220px;}
.f-b{grid-column:7 / 13;grid-row:1 / 2;}
.f-b .card-media img{aspect-ratio:16/9;}
.f-c{grid-column:7 / 10;grid-row:2 / 3;}
.f-d{grid-column:10 / 13;grid-row:2 / 3;}
.f-c .card-body,.f-d .card-body{padding:20px;}
.f-c .card-body h3,.f-d .card-body h3{font-size:17px;}

/* ---------------- Feed + sidebar ---------------- */
.feed{display:flex;flex-direction:column;border-top:1px solid var(--line-soft);}
.feed-item{border-bottom:1px solid var(--line-soft);}
.feed-link{
  display:block;padding:24px 20px;margin:0 -20px;border-radius:var(--r-md);
  transition:background .2s var(--ease);
}
.feed-link:hover{background:var(--bg-2);}
.feed-link:hover h3{color:var(--brand);}
.feed-top{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
.feed-top time{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;}
.feed-link h3{font-size:19px;line-height:1.5;margin-bottom:8px;transition:color .2s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feed-link p{margin:0;font-size:15px;line-height:1.75;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feed-more{display:flex;align-items:center;gap:8px;margin-top:16px;font-size:13px;color:var(--brand);}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 24px;text-align:center;border-radius:var(--r-lg);
  background:var(--bg-2);border:1px dashed rgba(255,255,255,.14);
}
.empty-state i{font-size:26px;color:var(--brand);}
.empty-state p{margin:0;font-size:15px;color:var(--text-2);}
.skeleton{height:84px;border-radius:var(--r-md);background:rgba(255,255,255,.05);margin-bottom:12px;}

.side-panel{
  position:sticky;top:100px;
  padding:26px;border-radius:var(--r-lg);
  background:var(--glass-bg);border:var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.side-panel h3{font-size:16px;margin-bottom:16px;letter-spacing:.04em;}
.pill-group{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px;}
.pill{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;padding:9px 14px;
  border-radius:var(--r-pill);background:var(--bg-2);color:var(--text-2);
  border:1px solid var(--line);transition:all .2s var(--ease);
}
.pill:hover,.pill.is-on{background:rgba(23,198,174,.10);color:var(--brand);border-color:rgba(23,198,174,.36);}
.hot-list{display:flex;flex-direction:column;gap:0;}
.hot-list li{border-bottom:1px dashed var(--line-soft);}
.hot-list li:last-child{border-bottom:0;}
.hot-list a{display:flex;gap:12px;padding:12px 0;font-size:14px;line-height:1.6;color:var(--text-2);}
.hot-list a:hover{color:var(--brand);}
.hot-list .n{font-family:Inter,"Segoe UI",system-ui,sans-serif;font-size:13px;color:var(--brand);font-weight:700;flex:0 0 18px;padding-top:2px;}

/* ---------------- Stats + wall + quote ---------------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:36px 8px;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
  margin-bottom:48px;
}
.stat-item{text-align:left;}
.stat-item strong{
  display:block;font-family:Inter,"Segoe UI",system-ui,sans-serif;
  font-variant-numeric:tabular-nums;font-size:clamp(34px,4vw,52px);
  line-height:1.1;color:var(--text-1);font-weight:700;letter-spacing:-.02em;
}
.stat-item strong em{font-style:normal;font-size:.44em;color:var(--brand);margin-left:6px;font-weight:600;}
.stat-item span{display:block;margin-top:8px;font-size:13px;color:var(--text-3);}
.wall{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:44px;
}
.wall-item{
  display:flex;align-items:center;justify-content:center;gap:10px;
  height:70px;border-radius:var(--r-md);
  background:rgba(255,255,255,.03);border:1px solid var(--line-soft);
  color:var(--text-3);font-size:14px;opacity:.62;
  transition:opacity .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.wall-item:hover{opacity:1;color:var(--text-1);border-color:var(--line-strong);transform:translateY(-2px);}
.wall-item i{color:var(--sub);}
.quote-card{
  position:relative;margin:0;padding:40px 44px;border-radius:var(--r-lg);
  background:var(--glass-bg);border:var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;
}
.quote-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent);
}
.quote-card p{font-size:18px;line-height:1.9;color:var(--text-1);margin-bottom:18px;}
.quote-card footer{font-size:13px;color:var(--text-3);letter-spacing:.06em;}

/* ---------------- FAQ ---------------- */
.faq-grid{display:flex;flex-wrap:wrap;}
.faq-col{display:flex;flex-direction:column;}
.faq-item{border-bottom:1px solid var(--line-soft);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 4px;background:transparent;border:0;cursor:pointer;
  text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-q .sign{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:12px;
  background:var(--bg-3);color:var(--brand);
  transition:transform .24s var(--ease),background .2s var(--ease);
}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-item.is-open .sign{transform:rotate(180deg);background:rgba(23,198,174,.16);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a p{margin:0;padding:0 4px 20px;font-size:15px;line-height:1.8;color:var(--text-2);}

/* ---------------- CTA ---------------- */
.cta-panel{
  display:flex;flex-wrap:wrap;align-items:center;gap:36px;
  padding:48px;border-radius:var(--r-xl);
  background:var(--glass-bg);border:var(--glass-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-2);
}
.cta-copy{flex:1 1 360px;}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;margin-bottom:12px;}
.cta-copy p{margin:0;font-size:15px;color:var(--text-2);}
.cta-copy small{display:block;margin-top:12px;font-size:12px;color:var(--text-3);}
.cta-form{flex:1 1 380px;display:flex;gap:12px;}
.cta-form input[type="email"]{
  flex:1 1 auto;height:48px;margin:0;padding:0 18px;border-radius:var(--r-md);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text-1);
  font-size:15px;box-shadow:none;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cta-form input[type="email"]::placeholder{color:var(--text-3);}
.cta-form input[type="email"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,198,174,.14);background:var(--bg-2);}

/* ---------------- Footer ---------------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line-soft);padding:64px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-3);max-width:300px;}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--text-1);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--text-3);display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);}
.footer-col ul a:hover{color:var(--brand);transform:translateX(2px);}
.footer-col p{font-size:14px;color:var(--text-3);margin:0 0 10px;}
.footer-col p strong{color:var(--text-2);font-weight:600;}
.footer-bottom{
  border-top:1px solid var(--line-soft);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------------- Responsive ---------------- */
@media (max-width:1279px){
  .f-a{grid-column:1 / 7;}
  .f-b{grid-column:7 / 13;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .container{padding:0 24px;}
  .header-inner{min-height:68px;gap:16px;}
  .nav-search{display:none;}
  .nav-links{display:none;}
  .burger{display:inline-flex;margin-left:auto;}
  .mobile-search{display:block;padding:0 0 14px;}
  .mobile-search .search-form{height:42px;}
  .mobile-search .search-form input[type="text"]{line-height:42px;padding:0 96px 0 42px;}
  .mobile-search .search-form button{height:32px;top:5px;padding:0 15px;font-size:13px;}
  .hero{padding:32px 0 24px;}
  .hero-panel{padding:36px 28px;}
  .feature-grid{grid-template-columns:1fr;}
  .f-a,.f-b,.f-c,.f-d{grid-column:auto;grid-row:auto;}
  .f-c,.f-d{display:flex;}
  .stat-band{grid-template-columns:repeat(2,1fr);gap:28px 24px;padding:32px 0;}
  .wall{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .side-panel{position:static;margin-top:24px;}
  .cta-panel{padding:36px 28px;}
}
@media (max-width:767px){
  .cta-form{flex-direction:column;}
  .cta-form .btn{width:100%;}
  .quote-card{padding:28px 24px;}
  .quote-card p{font-size:16px;}
}
@media (max-width:639px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .row{margin-left:-10px;margin-right:-10px;}
  .row .column,.row .columns{padding-left:10px;padding-right:10px;}
  .hero-panel{padding:28px 20px;border-radius:var(--r-lg);}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-trust{gap:10px 18px;}
  .story-item{grid-template-columns:1fr;gap:6px;}
  .story-item .idx{font-size:16px;}
  .timeline{padding-left:28px;}
  .tl-item::before{left:-24px;}
  .stat-band{grid-template-columns:1fr 1fr;}
  .wall{grid-template-columns:1fr 1fr;gap:10px;}
  .wall-item{height:60px;font-size:13px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px;}
  .site-footer{margin-top:56px;padding-top:44px;}
  .faq-q{font-size:15px;}
  .card-body{padding:20px;}
  .cta-panel{padding:28px 20px;border-radius:var(--r-lg);}
  .feed-link{padding:20px 14px;margin:0 -14px;}
}

/* roulang page: category1 */
:root{
  --bg-0:#060F16;
  --bg-1:#0A1A24;
  --bg-2:#0E2230;
  --bg-3:#122C3C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(23,198,174,.38);
  --text-1:#EAF4F8;
  --text-2:#A9BEC9;
  --text-3:#6E8794;
  --brand:#17C6AE;
  --brand-deep:#0E8F80;
  --sub:#4C8DE0;
  --accent:#F2B23E;
  --warn:#E86A5B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:24px;
  --r-pill:999px;
  --shadow-l1:0 1px 0 rgba(255,255,255,.06) inset;
  --shadow-l2:0 12px 32px -12px rgba(0,0,0,.55);
  --shadow-l3:0 0 0 1px rgba(23,198,174,.28), 0 14px 40px -14px rgba(23,198,174,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}

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

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

body{
  margin:0;
  padding:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Inter,"Segoe UI",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
strong{font-weight:700;}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:var(--r-sm);
}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,15,22,.90);
  backdrop-filter:blur(12px) saturate(120%);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,15,22,.97);
  border-bottom-color:rgba(255,255,255,.16);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:76px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  color:var(--text-1);
}
.brand-mark{
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:linear-gradient(140deg,rgba(23,198,174,.24),rgba(76,141,224,.16));
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-size:17px;
  box-shadow:var(--shadow-l1);
}
.brand-text strong{
  display:block;
  font-size:16px;
  line-height:1.2;
  letter-spacing:.01em;
  color:var(--text-1);
}
.brand-text span{
  display:block;
  font-size:10.5px;
  line-height:1.4;
  letter-spacing:.26em;
  color:var(--text-3);
}

.nav-search{
  flex:1 1 auto;
  max-width:452px;
  min-width:220px;
}
.search-form{
  display:flex;
  align-items:center;
  gap:6px;
  height:48px;
  padding:0 6px 0 16px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.search-form > i{
  color:var(--text-3);
  font-size:15px;
  flex:0 0 auto;
}
.search-form input[type="text"]{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  margin:0;
  padding:0 4px;
  background:transparent;
  border:0;
  box-shadow:none;
  color:var(--text-1);
  font-size:14.5px;
  line-height:1.4;
}
.search-form input[type="text"]::placeholder{color:var(--text-3);}
.search-form input[type="text"]:focus{outline:none;box-shadow:none;}
.search-form:focus-within{
  border-color:var(--brand);
  background:rgba(23,198,174,.06);
  box-shadow:0 0 0 3px rgba(23,198,174,.14);
}
.search-form button{
  flex:0 0 auto;
  height:36px;
  padding:0 18px;
  border:0;
  border-radius:var(--r-pill);
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.search-form button:hover{filter:brightness(1.06);transform:translateY(-1px);}
.search-form button:active{transform:translateY(0);}

.nav-links{
  display:flex;
  align-items:center;
  gap:22px;
  margin-left:auto;
  flex:0 0 auto;
}
.nav-links > a{
  position:relative;
  font-size:14.5px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav-links > a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:0;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transition:width .24s var(--ease);
}
.nav-links > a:hover{color:var(--text-1);}
.nav-links > a:hover::after{width:100%;}
.nav-links > a.is-active{color:var(--text-1);font-weight:600;}
.nav-links > a.is-active::after{width:100%;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),filter .2s var(--ease),background .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  box-shadow:var(--shadow-l3);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);filter:brightness(.98);}
.btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,.22);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.nav-cta{margin-left:2px;}

.burger{
  display:none;
  width:44px;
  height:44px;
  margin-left:auto;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.045);
  color:var(--text-1);
  font-size:17px;
  place-items:center;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.burger:hover{border-color:var(--brand);color:var(--brand);}

.mobile-search{display:none;padding-bottom:14px;}

.drawer{
  display:none;
  overflow:hidden;
  max-height:0;
  transition:max-height .28s var(--ease);
}
.drawer.is-open{max-height:460px;}
.drawer-nav{
  display:flex;
  flex-direction:column;
  padding:8px 0 22px;
}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:48px;
  padding:0 4px;
  font-size:15.5px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-nav a:hover,
.drawer-nav a.is-active{color:var(--brand);padding-left:8px;}
.drawer-nav a i{font-size:12px;color:var(--text-3);}

/* ---------- Page head ---------- */
.page-head{
  position:relative;
  padding:56px 0 56px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 320px at 15% -20%, rgba(23,198,174,.12), transparent 70%),
    var(--bg-1);
  overflow:hidden;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-3);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb i{font-size:10px;opacity:.7;}
.breadcrumb .current{color:var(--brand);}

.page-head-grid{
  display:grid;
  grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);
  gap:48px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  background:rgba(23,198,174,.10);
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-size:12.5px;
  letter-spacing:.06em;
  margin-bottom:20px;
}
h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.16;
  letter-spacing:-.02em;
  font-weight:700;
  color:var(--text-1);
  margin-bottom:18px;
}
.lead{
  font-size:16.5px;
  line-height:1.85;
  color:var(--text-2);
  max-width:640px;
}
.page-head-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.head-figure{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-l2);
  aspect-ratio:4/3;
}
.head-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(105%);
}
.head-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,15,22,.12) 0%,rgba(6,15,22,.62) 100%);
}
.head-figure figcaption{
  position:absolute;
  left:18px;
  right:18px;
  bottom:16px;
  z-index:2;
  font-size:12.5px;
  line-height:1.6;
  color:var(--text-2);
  letter-spacing:.02em;
}

/* ---------- Stats ---------- */
.stats{
  padding:44px 0;
  background:var(--bg-0);
  border-bottom:1px solid var(--line);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.stat{
  padding:22px 22px 20px;
  border-radius:var(--r-md);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  box-shadow:var(--shadow-l1);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.stat:hover{border-color:var(--line-strong);transform:translateY(-2px);}
.stat b{
  display:block;
  font-size:clamp(28px,3.2vw,40px);
  line-height:1.1;
  font-weight:700;
  color:var(--text-1);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat b em{font-style:normal;font-size:15px;color:var(--brand);margin-left:4px;letter-spacing:0;}
.stat span{
  display:block;
  margin-top:8px;
  font-size:13px;
  line-height:1.6;
  color:var(--text-3);
}

/* ---------- Section base ---------- */
.section{padding:88px 0;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-kicker::before{
  content:"";
  width:32px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
}
h2{
  font-size:clamp(24px,2.9vw,34px);
  line-height:1.28;
  letter-spacing:-.015em;
  font-weight:700;
  color:var(--text-1);
  margin-bottom:14px;
}
h3{
  font-size:21px;
  line-height:1.42;
  font-weight:700;
  color:var(--text-1);
  margin-bottom:12px;
}
.section-head p{font-size:16px;line-height:1.85;color:var(--text-2);}

/* ---------- Split rows ---------- */
.split-stack{display:flex;flex-direction:column;gap:64px;}
.split-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:56px;
  align-items:center;
}
.split-row.reverse .split-media{order:2;}
.split-media{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-l2);
  aspect-ratio:3/2;
  background:var(--bg-2);
}
.split-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.split-row:hover .split-media img{transform:scale(1.03);}
.step-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:28px;
  padding:0 13px;
  margin-bottom:16px;
  border-radius:var(--r-pill);
  background:rgba(76,141,224,.14);
  border:1px solid rgba(76,141,224,.32);
  color:#9CC4F5;
  font-size:12.5px;
  letter-spacing:.05em;
  font-variant-numeric:tabular-nums;
}
.split-body p{font-size:15.5px;line-height:1.85;color:var(--text-2);margin-bottom:16px;}
.point-list{margin:0 0 20px;}
.point-list li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  line-height:1.78;
  color:var(--text-2);
  margin-bottom:10px;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:11px;
  width:8px;
  height:8px;
  border-radius:3px;
  background:var(--brand);
  opacity:.85;
}
.point-list li strong{color:var(--text-1);font-weight:600;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand);
  padding-bottom:3px;
  background-image:linear-gradient(var(--brand),var(--brand));
  background-repeat:no-repeat;
  background-size:0% 2px;
  background-position:0 100%;
  transition:background-size .24s var(--ease),color .2s var(--ease);
}
.link-more:hover{background-size:100% 2px;}
.link-more i{font-size:12px;transition:transform .24s var(--ease);}
.link-more:hover i{transform:translateX(3px);}

/* ---------- Scene cards ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.scene-card{
  padding:28px;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  box-shadow:var(--shadow-l1);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{
  border-color:var(--line-strong);
  transform:translateY(-2px);
  box-shadow:var(--shadow-l2);
}
.scene-icon{
  width:44px;
  height:44px;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:var(--bg-3);
  border:1px solid var(--line);
  color:var(--sub);
  font-size:17px;
  margin-bottom:16px;
}
.scene-card h3{font-size:18px;margin-bottom:10px;}
.scene-card p{font-size:15px;line-height:1.78;color:var(--text-2);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 11px;
  border-radius:var(--r-pill);
  background:var(--bg-3);
  border:1px solid transparent;
  color:#9CC4F5;
  font-size:12px;
  letter-spacing:.02em;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{color:var(--brand);border-color:var(--line-strong);background:rgba(23,198,174,.10);}

/* ---------- Checklist ---------- */
.check-layout{
  display:grid;
  grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);
  gap:56px;
  align-items:start;
}
.check-side{
  position:sticky;
  top:104px;
  padding:28px;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.check-side h3{font-size:19px;margin-bottom:12px;}
.check-side p{font-size:14.5px;line-height:1.8;color:var(--text-2);}
.check-side .accent-line{
  width:56px;
  height:3px;
  border-radius:2px;
  background:var(--accent);
  margin:18px 0 0;
}
.check-list{
  display:flex;
  flex-direction:column;
  gap:0;
  border-top:1px solid var(--line);
}
.check-item{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:18px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.check-item:hover{background:rgba(255,255,255,.025);}
.check-num{
  font-size:15px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
  padding-top:2px;
}
.check-item h4{
  font-size:16.5px;
  font-weight:600;
  color:var(--text-1);
  margin-bottom:6px;
}
.check-item p{font-size:14.5px;line-height:1.78;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.faq-item{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg-2);
  overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item.is-open{border-color:var(--line-strong);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:64px;
  padding:16px 20px;
  background:transparent;
  border:0;
  text-align:left;
  color:var(--text-1);
  font-size:15.5px;
  font-weight:600;
  line-height:1.5;
  cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-q .faq-sign{
  flex:0 0 auto;
  width:26px;
  height:26px;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--brand);
  font-size:12px;
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.faq-item.is-open .faq-sign{transform:rotate(180deg);border-color:var(--line-strong);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 20px 20px;
  font-size:14.8px;
  line-height:1.82;
  color:var(--text-2);
}

/* ---------- CTA ---------- */
.cta-band{
  padding:0 0 96px;
}
.cta-panel{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
  gap:40px;
  align-items:center;
  padding:44px;
  border-radius:var(--r-xl);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-l2);
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  right:-120px;
  top:-120px;
  width:320px;
  height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(23,198,174,.16),transparent 68%);
  pointer-events:none;
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel p{font-size:15.5px;line-height:1.8;color:var(--text-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;position:relative;z-index:1;}
.cta-meta{
  margin-top:14px;
  font-size:12.5px;
  color:var(--text-3);
  letter-spacing:.02em;
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{
  font-size:14.5px;
  line-height:1.8;
  color:var(--text-2);
  max-width:330px;
}
.footer-brand .footer-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--text-3);
}
.site-footer h4{
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-list li{margin-bottom:10px;}
.footer-list a{
  display:inline-block;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-list a:hover{color:var(--brand);transform:translateX(2px);}
.footer-list span{
  display:block;
  font-size:14px;
  color:var(--text-2);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color .2s var(--ease);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{padding-left:28px;padding-right:28px;}
}

@media (max-width:1023px){
  .container{padding-left:24px;padding-right:24px;}
  .nav-search,.nav-links{display:none;}
  .burger{display:grid;}
  .mobile-search{display:block;}
  .drawer{display:block;}
  .header-inner{min-height:68px;gap:16px;}
  .page-head{padding:40px 0 44px;}
  .page-head-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .head-figure{order:2;aspect-ratio:16/9;}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .section{padding:68px 0;}
  .section-head{margin-bottom:36px;}
  .split-stack{gap:48px;}
  .split-row{grid-template-columns:minmax(0,1fr);gap:28px;}
  .split-row.reverse .split-media{order:0;}
  .scene-grid{grid-template-columns:minmax(0,1fr);}
  .check-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .check-side{position:static;}
  .faq-list{grid-template-columns:minmax(0,1fr);}
  .cta-band{padding:0 0 72px;}
  .cta-panel{grid-template-columns:minmax(0,1fr);gap:26px;padding:32px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}

@media (max-width:639px){
  .container{padding-left:18px;padding-right:18px;}
  body{font-size:16px;}
  .page-head{padding:30px 0 36px;}
  h1{font-size:clamp(26px,7vw,32px);}
  .lead{font-size:15.5px;}
  .page-head-actions{gap:12px;}
  .page-head-actions .btn{width:100%;height:46px;}
  .stats{padding:32px 0;}
  .stats-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .stat{padding:18px;}
  .section{padding:56px 0;}
  h2{font-size:clamp(22px,6.4vw,27px);}
  h3{font-size:19px;}
  .split-media{aspect-ratio:16/10;}
  .scene-card{padding:22px;}
  .check-item{grid-template-columns:40px minmax(0,1fr);gap:14px;}
  .faq-q{font-size:15px;min-height:56px;padding:14px 16px;}
  .faq-a p{padding:0 16px 18px;}
  .cta-panel{padding:24px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .search-form{height:44px;}
  .search-form button{height:34px;padding:0 15px;font-size:13.5px;}
  .drawer-nav a{min-height:48px;}
}

/* roulang page: article */
:root{
  --bg-0:#060F16;
  --bg-1:#0A1A24;
  --bg-2:#0E2230;
  --bg-3:#122C3C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(23,198,174,.38);
  --text-1:#EAF4F8;
  --text-2:#A9BEC9;
  --text-3:#6E8794;
  --brand:#17C6AE;
  --brand-deep:#0E8F80;
  --sub:#4C8DE0;
  --accent:#F2B23E;
  --warn:#E86A5B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:24px;
  --r-pill:999px;
  --shadow-1:inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-2:0 12px 32px -12px rgba(0,0,0,.55);
  --shadow-3:0 0 0 1px rgba(23,198,174,.28),0 14px 40px -14px rgba(23,198,174,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:Inter,"Segoe UI",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease)}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:rgba(23,198,174,.32);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:32px;padding-right:32px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ===== Header ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,15,22,.86);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:26px;
  min-height:76px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  color:var(--brand);font-size:18px;
  background:linear-gradient(140deg,rgba(23,198,174,.22),rgba(76,141,224,.14));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-1);
}
.brand-text strong{
  display:block;
  color:var(--text-1);
  font-size:18px;
  line-height:1.2;
  letter-spacing:.02em;
  font-weight:700;
}
.brand-text span{
  display:block;
  color:var(--text-3);
  font-size:11px;
  line-height:1.5;
  letter-spacing:.34em;
}
.nav-search{flex:1 1 auto;max-width:520px;margin:0 auto}
.search-form{
  position:relative;
  display:flex;
  align-items:center;
  height:48px;
  padding:0 6px 0 44px;
  border-radius:var(--r-pill);
  background:var(--bg-2);
  border:1px solid var(--line);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.search-form > i{
  position:absolute;
  left:18px;
  color:var(--text-3);
  font-size:15px;
  pointer-events:none;
}
.search-form input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  color:var(--text-1);
  font-size:15px;
  outline:none;
}
.search-form input::placeholder{color:var(--text-3)}
.search-form button{
  flex:0 0 auto;
  height:38px;
  padding:0 20px;
  border:0;
  border-radius:var(--r-pill);
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  font-size:14px;
  font-weight:600;
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.search-form button:hover{filter:brightness(1.06)}
.search-form button:active{transform:translateY(1px)}
.search-form:focus-within{
  border-color:var(--brand);
  background:var(--bg-3);
  box-shadow:0 0 0 3px rgba(23,198,174,.16);
}
.nav-links{display:flex;align-items:center;gap:20px;flex:0 0 auto}
.nav-links > a{
  position:relative;
  padding:6px 0;
  font-size:14px;
  color:var(--text-2);
  white-space:nowrap;
}
.nav-links > a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--brand);
  border-radius:2px;
  transition:width .22s var(--ease);
}
.nav-links > a:hover{color:var(--text-1)}
.nav-links > a:hover::after{width:100%}
.nav-links > a.is-active{color:var(--text-1)}
.nav-links > a.is-active::after{width:100%}
.nav-links .nav-cta{color:var(--text-1)}
.nav-links .nav-cta::after{display:none}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  text-align:center;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),filter .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  box-shadow:var(--shadow-3);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);filter:brightness(1)}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 18px;font-size:13px}
.btn-block{width:100%}
.burger{
  display:none;
  width:44px;height:44px;
  place-items:center;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-1);
  font-size:17px;
}
.burger:hover{border-color:var(--line-strong);color:var(--brand)}
.mobile-search{display:none;padding-bottom:14px}
.drawer{display:none;border-top:1px solid var(--line);padding:10px 0 18px}
.drawer.open{display:block;animation:drawerIn .22s var(--ease)}
@keyframes drawerIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 4px;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  font-size:15px;
}
.drawer-nav a i{font-size:12px;color:var(--text-3)}
.drawer-nav a:hover{color:var(--brand)}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-cta{margin-top:16px;width:100%}

/* ===== Article head ===== */
.article-hero{padding:44px 0 0;position:relative;overflow:hidden}
.article-hero::before{
  content:"";
  position:absolute;
  right:-160px;top:-120px;
  width:520px;height:520px;
  background:radial-gradient(circle,rgba(23,198,174,.10),transparent 68%);
  pointer-events:none;
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  position:relative;
}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(255,255,255,.18)}
.breadcrumb .current{
  color:var(--text-1);
  max-width:520px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-hero h1{
  position:relative;
  margin:18px 0 18px;
  max-width:900px;
  font-size:clamp(28px,4.2vw,46px);
  line-height:1.2;
  letter-spacing:-.02em;
  font-weight:700;
  color:var(--text-1);
}
.meta-line{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
  font-family:var(--font-num);
}
.meta-line .pill{font-family:var(--font-cn)}
.meta-line .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22)}
.pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:var(--bg-3);
  border:1px solid var(--line);
  color:var(--sub);
  font-size:12px;
  line-height:1.6;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.pill:hover{color:var(--brand);border-color:var(--line-strong);background:rgba(23,198,174,.10)}
.pill-brand{
  background:rgba(23,198,174,.10);
  border-color:var(--line-strong);
  color:var(--brand);
}
.lead{
  margin-top:22px;
  max-width:820px;
  padding-left:14px;
  border-left:3px solid var(--brand);
  color:var(--text-2);
  font-size:16px;
  line-height:1.85;
}

/* ===== Layout ===== */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:48px;
  align-items:start;
  padding:36px 0 64px;
}
.article-main{min-width:0;max-width:840px;width:100%}
.article-body{
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:40px clamp(20px,4vw,48px);
  box-shadow:var(--shadow-2);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  color:var(--text-2);
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  margin:42px 0 16px;
  padding-left:14px;
  border-left:3px solid var(--brand);
  font-size:clamp(21px,2.4vw,28px);
  line-height:1.35;
  color:var(--text-1);
  letter-spacing:-.01em;
  scroll-margin-top:96px;
}
.article-body h3{
  margin:30px 0 12px;
  font-size:20px;
  line-height:1.45;
  color:var(--text-1);
  scroll-margin-top:96px;
}
.article-body h4{
  margin:24px 0 10px;
  font-size:17px;
  line-height:1.5;
  color:var(--text-1);
}
.article-body p{
  margin:0 0 18px;
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
}
.article-body ul,.article-body ol{
  margin:0 0 20px;
  padding-left:22px;
  color:var(--text-2);
  font-size:16px;
  line-height:1.85;
}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:10px}
.article-body li::marker{color:var(--brand)}
.article-body a{
  color:var(--brand);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-body a:hover{color:#5BE2D0}
.article-body strong,.article-body b{color:var(--text-1);font-weight:600}
.article-body blockquote{
  margin:28px 0;
  padding:18px 22px;
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-left:3px solid var(--accent);
  border-radius:var(--r-md);
  color:var(--text-2);
  font-size:16px;
  line-height:1.85;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  margin:26px auto;
  border-radius:var(--r-md);
  border:1px solid var(--line);
}
.article-body figure{margin:28px 0}
.article-body figure img{margin:0 auto}
.article-body figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}
.article-body table{
  width:100%;
  margin:24px 0;
  border-collapse:collapse;
  font-size:14px;
  line-height:1.7;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:11px 14px;
  text-align:left;
  border-bottom:1px solid var(--line);
}
.article-body th{color:var(--text-1);background:var(--bg-3);font-weight:600}
.article-body tbody tr:nth-child(odd){background:rgba(14,34,48,.55)}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body code{
  padding:2px 6px;
  border-radius:6px;
  background:var(--bg-2);
  color:var(--brand);
  font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  margin:24px 0;
  padding:18px 20px;
  border-radius:var(--r-md);
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:auto;
}
.article-body pre code{background:none;padding:0;color:var(--text-1)}
.article-body hr{
  margin:34px 0;
  border:0;
  border-top:1px solid var(--line);
}
.empty-state{
  padding:48px 20px 52px;
  text-align:center;
}
.empty-state .empty-icon{
  width:64px;height:64px;
  margin:0 auto 18px;
  display:grid;place-items:center;
  border-radius:50%;
  background:rgba(23,198,174,.10);
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-size:24px;
}
.empty-state h2{
  margin:0 0 10px;
  padding:0;
  border:0;
  font-size:24px;
  color:var(--text-1);
}
.empty-state p{margin:0 auto 22px;max-width:440px;font-size:15px;color:var(--text-3)}
.empty-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}

/* ===== Side ===== */
.article-side{
  position:sticky;
  top:100px;
  display:flex;
  flex-direction:column;
  gap:18px;
  min-width:0;
}
.side-card{
  padding:20px;
  border-radius:var(--r-md);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1);
}
.side-title{
  margin-bottom:14px;
  font-size:12px;
  letter-spacing:.2em;
  font-weight:600;
  color:var(--text-3);
  text-transform:uppercase;
}
.toc-list{display:flex;flex-direction:column}
.toc-list a{
  display:block;
  padding:8px 0 8px 12px;
  border-left:2px solid var(--line);
  font-size:14px;
  line-height:1.55;
  color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease);
}
.toc-list a:hover,.toc-list a.active{
  color:var(--brand);
  border-left-color:var(--brand);
  padding-left:16px;
}
.side-links{display:flex;flex-direction:column}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:14px;
  color:var(--text-2);
}
.side-links a:last-child{border-bottom:0;padding-bottom:0}
.side-links a i{font-size:11px;color:var(--text-3);transition:transform .2s var(--ease),color .2s var(--ease)}
.side-links a:hover{color:var(--brand)}
.side-links a:hover i{color:var(--brand);transform:translateX(3px)}
.side-note{
  font-size:13px;
  line-height:1.8;
  color:var(--text-3);
}
.side-note strong{display:block;color:var(--text-1);font-size:14px;margin-bottom:6px}
.side-card .btn{margin-top:14px}

/* ===== Related ===== */
.related{padding:0 0 72px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:26px;
}
.section-head h2{
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--text-1);
}
.section-head p{margin-top:6px;font-size:14px;color:var(--text-3)}
.section-head .head-link{
  flex:0 0 auto;
  font-size:14px;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.section-head .head-link:hover{gap:10px}
.related-grid{margin-left:-12px;margin-right:-12px}
.related-grid > .columns{padding-left:12px;padding-right:12px}
.related-card{
  display:flex;
  flex-direction:column;
  height:100%;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.related-card figure{
  margin:0;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-2);
}
.related-card figure img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.related-card .card-body{
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1 1 auto;
  padding:18px 20px 20px;
}
.related-card .card-tag{
  align-self:flex-start;
  padding:3px 10px;
  border-radius:var(--r-pill);
  background:var(--bg-3);
  border:1px solid var(--line);
  color:var(--sub);
  font-size:12px;
}
.related-card h3{
  font-size:17px;
  line-height:1.55;
  color:var(--text-1);
  transition:color .2s var(--ease);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-card p{
  font-size:14px;
  line-height:1.7;
  color:var(--text-3);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-card .card-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:auto;
  padding-top:8px;
  font-size:12px;
  color:var(--text-3);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
}
.related-card .card-meta i{color:var(--brand);font-size:11px}
.related-card:hover{
  transform:translateY(-2px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-2);
}
.related-card:hover h3{color:var(--brand)}
.related-card:hover figure img{transform:scale(1.03)}

/* ===== CTA ===== */
.cta-band{padding:0 0 84px}
.cta-panel{
  display:grid;
  grid-template-columns:1.15fr .95fr;
  gap:34px;
  align-items:center;
  padding:clamp(28px,4vw,52px);
  border-radius:var(--r-xl);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-2);
}
.cta-panel h2{
  font-size:clamp(22px,2.7vw,32px);
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--text-1);
}
.cta-panel p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:520px}
.cta-form{display:flex;gap:12px}
.cta-form input{
  flex:1 1 auto;
  min-width:0;
  height:48px;
  padding:0 16px;
  border-radius:var(--r-md);
  background:var(--bg-2);
  border:1px solid var(--line);
  color:var(--text-1);
  font-size:15px;
  outline:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.cta-form input::placeholder{color:var(--text-3)}
.cta-form input:focus{
  border-color:var(--brand);
  background:var(--bg-3);
  box-shadow:0 0 0 3px rgba(23,198,174,.14);
}
.cta-form .btn{flex:0 0 auto}
.privacy{margin-top:10px;font-size:12px;line-height:1.7;color:var(--text-3)}

/* ===== Footer ===== */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:60px 0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand .brand{margin-bottom:4px}
.footer-brand p{
  margin-top:16px;
  max-width:320px;
  font-size:14px;
  line-height:1.85;
  color:var(--text-3);
}
.footer-col h4{
  margin-bottom:16px;
  font-size:14px;
  font-weight:600;
  color:var(--text-1);
  letter-spacing:.04em;
}
.footer-col a{
  display:block;
  padding:6px 0;
  font-size:14px;
  color:var(--text-3);
}
.footer-col a:hover{color:var(--brand);transform:translateX(2px)}
.footer-col p{font-size:13px;line-height:1.85;color:var(--text-3)}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom .foot-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a:hover{color:var(--brand)}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 272px;gap:32px}
  .nav-links{gap:14px}
}
@media (max-width:1023px){
  .nav-search,.nav-links{display:none}
  .burger{display:grid;margin-left:auto}
  .mobile-search{display:block}
  .header-inner{min-height:70px;gap:16px}
  .article-layout{grid-template-columns:1fr;gap:30px;padding:30px 0 52px}
  .article-main{max-width:none}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 280px}
  .cta-panel{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding-bottom:64px}
  .related{padding-bottom:56px}
}
@media (max-width:767px){
  .container{padding-left:24px;padding-right:24px}
  body{font-size:16px}
  .article-hero{padding-top:32px}
  .article-hero h1{margin:14px 0 14px}
  .article-body{padding:26px 22px}
  .article-body p{font-size:16px;line-height:1.85}
  .article-body h2{margin-top:34px}
  .lead{font-size:15px}
  .breadcrumb .current{max-width:100%;white-space:normal}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .related-grid > .columns{margin-bottom:18px}
  .related-grid > .columns:last-child{margin-bottom:0}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:519px){
  .container{padding-left:18px;padding-right:18px}
  .header-inner{min-height:64px}
  .brand-mark{width:38px;height:38px;border-radius:11px;font-size:16px}
  .brand-text strong{font-size:16px}
  .brand-text span{font-size:10px;letter-spacing:.28em}
  .search-form{height:44px;padding-left:40px}
  .search-form button{height:34px;padding:0 16px;font-size:13px}
  .article-body{padding:22px 18px}
  .article-layout{padding-top:24px}
  .meta-line{font-size:12px;gap:8px}
  .footer-grid{grid-template-columns:1fr}
  .side-card{padding:18px}
  .btn{height:44px;padding:0 20px}
  .btn-sm{height:36px;padding:0 14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --bg-0:#060F16;
  --bg-1:#0A1A24;
  --bg-2:#0E2230;
  --bg-3:#122C3C;
  --line:rgba(255,255,255,0.10);
  --line-strong:rgba(23,198,174,0.38);
  --text-1:#EAF4F8;
  --text-2:#A9BEC9;
  --text-3:#6E8794;
  --brand:#17C6AE;
  --brand-deep:#0E8F80;
  --sub:#4C8DE0;
  --accent:#F2B23E;
  --warn:#E86A5B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:24px;
  --r-pill:999px;
  --sh-l2:0 12px 32px -12px rgba(0,0,0,.55);
  --sh-l3:0 0 0 1px rgba(23,198,174,.28),0 14px 40px -14px rgba(23,198,174,.35);
  --glass:rgba(255,255,255,0.045);
  --ease:cubic-bezier(.2,.7,.3,1);
}

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

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

body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Inter,"Segoe UI",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  color:var(--text-1);
  margin:0;
  font-weight:700;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.25;}
h3{font-size:21px;line-height:1.4;}
h4{font-size:17px;line-height:1.5;}

p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand);}

img{max-width:100%;display:block;height:auto;}

ul,ol{margin:0;padding:0;list-style:none;}

button{font-family:inherit;}

:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

.row{max-width:none;margin-left:-12px;margin-right:-12px;}
.row .columns{padding-left:12px;padding-right:12px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,15,22,.86);
  backdrop-filter:blur(12px) saturate(120%);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,15,22,.96);
  border-bottom-color:rgba(255,255,255,.14);
}

.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:76px;
  padding:12px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--text-1);
}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:42px;
  height:42px;
  border-radius:13px;
  display:grid;
  place-items:center;
  font-size:19px;
  color:#04181A;
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  box-shadow:0 8px 20px -10px rgba(23,198,174,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;letter-spacing:.02em;color:var(--text-1);}
.brand-text span{font-size:11px;letter-spacing:.28em;color:var(--text-3);}

.nav-search{
  flex:1 1 40%;
  max-width:470px;
  margin:0 auto;
}

.search-form{
  position:relative;
  display:flex;
  align-items:center;
  height:48px;
  padding:6px 6px 6px 44px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-form:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(23,198,174,.14);
}
.search-form > i{
  position:absolute;
  left:17px;
  top:50%;
  transform:translateY(-50%);
  font-size:15px;
  color:var(--text-3);
}
.search-form input[type="text"]{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  background:transparent;
  border:0;
  margin:0;
  padding:0 8px;
  color:var(--text-1);
  font-size:15px;
  box-shadow:none;
}
.search-form input[type="text"]::placeholder{color:var(--text-3);}
.search-form input[type="text"]:focus{outline:none;box-shadow:none;}
.search-form button{
  flex:0 0 auto;
  height:36px;
  padding:0 18px;
  border:0;
  border-radius:var(--r-pill);
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:transform .2s var(--ease),filter .2s var(--ease);
}
.search-form button:hover{filter:brightness(1.06);transform:translateY(-1px);}
.search-form button:active{transform:translateY(0);}

.nav-links{
  display:flex;
  align-items:center;
  gap:22px;
  flex:0 0 auto;
}
.nav-links > a{
  position:relative;
  color:var(--text-2);
  font-size:15px;
  padding:6px 0;
  white-space:nowrap;
}
.nav-links > a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links > a:hover{color:var(--text-1);}
.nav-links > a:hover::after{transform:scaleX(1);}
.nav-links > a.is-active{color:var(--text-1);}
.nav-links > a.is-active::after{transform:scaleX(1);}

.nav-cta{
  padding:9px 20px !important;
  border-radius:var(--r-pill);
  font-size:14px !important;
}
.nav-cta::after{display:none !important;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),filter .2s var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  box-shadow:var(--sh-l3);
}
.btn-primary:hover{
  color:#04181A;
  filter:brightness(1.06);
  transform:translateY(-2px);
}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,.18);
  color:var(--text-1);
}
.btn-ghost:hover{
  border-color:var(--brand);
  color:var(--brand);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}

.burger{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-1);
  font-size:17px;
  cursor:pointer;
}
.burger:hover{border-color:var(--line-strong);color:var(--brand);}

.mobile-search{display:none;padding-bottom:14px;}

.drawer{
  display:none;
  border-top:1px solid var(--line);
  padding:12px 0 20px;
}
.drawer.is-open{display:block;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 14px;
  border-radius:var(--r-md);
  color:var(--text-2);
  font-size:16px;
  border:1px solid transparent;
}
.drawer-nav a:hover{background:var(--bg-2);color:var(--text-1);}
.drawer-nav a.is-active{
  color:var(--brand);
  background:rgba(23,198,174,.08);
  border-color:var(--line-strong);
}
.drawer-nav a i{font-size:12px;opacity:.7;}
.drawer-cta{margin-top:12px;width:100%;}

/* ---------- main sections ---------- */
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:34px;
  height:1px;
  background:var(--accent);
  display:inline-block;
}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head p{margin-top:16px;font-size:16px;}

/* ---------- page hero ---------- */
.page-hero{
  padding:56px 0 64px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 320px at 12% -20%, rgba(23,198,174,.10), transparent 70%),
    var(--bg-0);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb span.sep{opacity:.6;}
.breadcrumb .current{color:var(--brand);}

.hero-title{margin-bottom:18px;}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  max-width:620px;
  color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

.hero-figure{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-l2);
}
.hero-figure img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
}
.hero-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(6,15,22,0) 35%,rgba(6,15,22,.7) 100%);
  pointer-events:none;
}
.hero-figure figcaption{
  position:absolute;
  left:18px;
  right:18px;
  bottom:14px;
  z-index:2;
  font-size:13px;
  color:var(--text-2);
}

/* ---------- numbered layout ---------- */
.num-nav{
  position:sticky;
  top:100px;
  padding:22px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.num-nav h2{
  font-size:13px;
  letter-spacing:.18em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:14px;
}
.num-nav ol{display:flex;flex-direction:column;gap:4px;}
.num-nav a{
  display:flex;
  gap:12px;
  align-items:baseline;
  padding:12px 14px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  color:var(--text-2);
  font-size:15px;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.num-nav a .n{
  font-size:13px;
  font-weight:700;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
}
.num-nav a:hover{background:var(--bg-2);color:var(--text-1);}
.num-nav a.active{
  background:rgba(23,198,174,.08);
  border-color:var(--line-strong);
  color:var(--brand);
}
.num-nav a.active .n{color:var(--brand);}

.num-content{display:flex;flex-direction:column;gap:20px;}

.num-item{
  padding:30px;
  border-radius:var(--r-lg);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  scroll-margin-top:110px;
  transition:border-color .22s var(--ease),transform .22s var(--ease),background .22s var(--ease);
}
.num-item:hover{
  border-color:var(--line-strong);
  background:rgba(255,255,255,.06);
  transform:translateY(-2px);
}
.num-item-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:14px;
}
.num-badge{
  flex:0 0 auto;
  width:40px;
  height:40px;
  border-radius:12px;
  display:grid;
  place-items:center;
  background:rgba(23,198,174,.10);
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-size:14px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.num-item h3{font-size:21px;}
.num-item p{font-size:15px;line-height:1.8;}

.check-list{margin:16px 0 0;display:flex;flex-direction:column;gap:8px;}
.check-list li{
  position:relative;
  padding-left:24px;
  font-size:15px;
  line-height:1.75;
  color:var(--text-2);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:2px;
  top:10px;
  width:10px;
  height:10px;
  border-radius:3px;
  border:1.5px solid var(--brand);
  background:rgba(23,198,174,.16);
}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  color:var(--sub);
  background:var(--bg-3);
  border:1px solid rgba(76,141,224,.22);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.chip:hover{color:var(--brand);border-color:var(--line-strong);background:rgba(23,198,174,.10);}

/* ---------- stat panel ---------- */
.stat-panel{
  border-radius:var(--r-xl);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  padding:36px;
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
}
.stat-item{border-left:1px solid var(--line);padding-left:22px;}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:Inter,"Segoe UI",system-ui,sans-serif;
  font-size:clamp(34px,4vw,52px);
  line-height:1.05;
  font-weight:700;
  color:var(--text-1);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat-num em{font-style:normal;font-size:.42em;color:var(--brand);margin-left:6px;letter-spacing:0;}
.stat-label{font-size:13px;color:var(--text-3);margin-top:8px;line-height:1.6;}

/* ---------- faq ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--bg-2);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:56px;
  padding:16px 22px;
  background:transparent;
  border:0;
  text-align:left;
  color:var(--text-1);
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  line-height:1.6;
}
.faq-q .ic{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:50%;
  display:grid;
  place-items:center;
  border:1px solid var(--line);
  color:var(--brand);
  font-size:12px;
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.faq-item.is-open .faq-q .ic{transform:rotate(180deg);background:rgba(23,198,174,.12);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-a-inner{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  border-top:1px solid transparent;
}

/* ---------- cta ---------- */
.cta-panel{
  padding:48px;
  border-radius:var(--r-xl);
  background:
    radial-gradient(700px 260px at 88% 0%, rgba(23,198,174,.14), transparent 70%),
    var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--sh-l2);
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel p{max-width:460px;font-size:15px;}
.cta-form{
  display:flex;
  gap:12px;
  align-items:center;
}
.cta-form input[type="email"]{
  flex:1 1 auto;
  min-width:0;
  height:48px;
  margin:0;
  padding:0 18px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-1);
  font-size:15px;
  box-shadow:none;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cta-form input[type="email"]::placeholder{color:var(--text-3);}
.cta-form input[type="email"]:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(23,198,174,.14);
}
.cta-note{font-size:12px;color:var(--text-3);margin-top:14px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-3);margin-top:16px;max-width:300px;}
.footer-col h4{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  display:inline-block;
  color:var(--text-2);
  font-size:14px;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:var(--brand);transform:translateX(2px);}
.footer-col p{font-size:14px;color:var(--text-3);line-height:1.8;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  padding-top:24px;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom .domain{color:var(--text-3);}

/* ---------- responsive ---------- */
@media screen and (max-width:1279px){
  .container{padding:0 32px;}
}

@media screen and (max-width:1023px){
  .container{padding:0 24px;}
  .header-inner{gap:16px;min-height:68px;}
  .nav-search,.nav-links{display:none;}
  .burger{display:inline-flex;align-items:center;justify-content:center;margin-left:auto;}
  .mobile-search{display:block;}
  .search-form{height:44px;}
  .search-form button{height:32px;padding:0 14px;font-size:13px;}
  .section{padding:72px 0;}
  .page-hero{padding:40px 0 52px;}
  .num-nav{
    position:static;
    margin-bottom:24px;
    padding:18px;
  }
  .num-nav ol{
    flex-direction:row;
    overflow-x:auto;
    gap:8px;
    padding-bottom:4px;
    -webkit-overflow-scrolling:touch;
  }
  .num-nav a{
    flex:0 0 auto;
    white-space:nowrap;
    padding:10px 14px;
    font-size:14px;
  }
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .stat-item{border-left:1px solid var(--line);padding-left:18px;}
  .stat-item:nth-child(odd){border-left:0;padding-left:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-panel{padding:36px;}
}

@media screen and (max-width:639px){
  .container{padding:0 18px;}
  body{font-size:16px;}
  .brand-text strong{font-size:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .page-hero{padding:32px 0 44px;}
  .hero-lead{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .num-item{padding:22px;}
  .num-badge{width:34px;height:34px;border-radius:10px;font-size:13px;}
  .num-item h3{font-size:19px;}
  .stat-panel{padding:24px;}
  .stat-grid{grid-template-columns:1fr;gap:20px;}
  .stat-item,
  .stat-item:nth-child(odd),
  .stat-item:nth-child(3){
    border-left:0;
    padding-left:0;
    border-top:1px solid var(--line);
    padding-top:16px;
  }
  .stat-item:first-child{border-top:0;padding-top:0;}
  .cta-panel{padding:26px;}
  .cta-form{flex-direction:column;align-items:stretch;}
  .cta-form .btn{width:100%;}
  .faq-q{padding:14px 16px;font-size:15px;}
  .faq-a-inner{padding:0 16px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* roulang page: category3 */
:root{
  --bg-0:#060F16;
  --bg-1:#0A1A24;
  --bg-2:#0E2230;
  --bg-3:#122C3C;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(23,198,174,.38);
  --text-1:#EAF4F8;
  --text-2:#A9BEC9;
  --text-3:#6E8794;
  --brand:#17C6AE;
  --brand-deep:#0E8F80;
  --sub:#4C8DE0;
  --accent:#F2B23E;
  --warn:#E86A5B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-xl:24px;
  --r-pill:999px;
  --l1:inset 0 1px 0 rgba(255,255,255,.06);
  --l2:0 12px 32px -12px rgba(0,0,0,.55);
  --l3:0 0 0 1px rgba(23,198,174,.28),0 14px 40px -14px rgba(23,198,174,.35);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --font-num:Inter,"Segoe UI",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(30px,4.4vw,50px);line-height:1.16;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,34px);line-height:1.28;}
h3{font-size:21px;line-height:1.4;}
h4{font-size:17px;line-height:1.5;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
img{display:block;max-width:100%;height:auto;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input[type="text"]{font-family:inherit;}
a:focus-visible,
button:focus-visible,
input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(23,198,174,.28);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.row{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px;max-width:none;}
.row .column{padding-left:12px;padding-right:12px;}
.section{padding:80px 0;}
.section-tight{padding:56px 0;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,15,22,.86);
  backdrop-filter:blur(12px) saturate(120%);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 14px 30px -22px rgba(0,0,0,.9);}
.header-inner{
  display:grid;
  grid-template-columns:auto minmax(300px,42%) auto;
  justify-content:space-between;
  align-items:center;
  gap:28px;
  min-height:78px;
}
.brand{display:inline-flex;align-items:center;gap:12px;}
.brand-mark{
  width:42px;height:42px;
  display:grid;place-items:center;
  border-radius:13px;
  background:linear-gradient(135deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  font-size:19px;
  box-shadow:var(--l3);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{color:var(--text-1);font-size:17px;letter-spacing:.02em;font-weight:700;}
.brand-text span{color:var(--text-3);font-size:11.5px;letter-spacing:.22em;}
.brand:hover .brand-text strong{color:var(--brand);}

.nav-search{width:100%;}
.search-form{
  position:relative;
  display:flex;
  align-items:center;
  height:48px;
  padding:4px 4px 4px 44px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.search-form > i{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  font-size:15px;color:var(--text-3);
}
.search-form input[type="text"]{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  margin:0;
  padding:0 8px 0 0;
  border:0;
  background:transparent;
  color:var(--text-1);
  font-size:15px;
  box-shadow:none;
  outline:none;
}
.search-form input[type="text"]::placeholder{color:var(--text-3);}
.search-form button{
  flex:0 0 auto;
  height:38px;
  padding:0 20px;
  border:0;
  border-radius:var(--r-pill);
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:filter .2s var(--ease),transform .2s var(--ease);
}
.search-form button:hover{filter:brightness(1.07);}
.search-form button:active{transform:scale(.98);}
.search-form:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(23,198,174,.16);}

.nav-links{display:flex;align-items:center;gap:22px;}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a:not(.nav-cta)::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--brand);
  border-radius:2px;
  transition:width .22s var(--ease);
}
.nav-links a:not(.nav-cta):hover{color:var(--text-1);}
.nav-links a:not(.nav-cta):hover::after{width:100%;}
.nav-links a.is-active{color:var(--brand);}
.nav-links a.is-active::after{width:100%;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),background .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(100deg,#17C6AE 0%,#2FA8D8 100%);
  color:#04181A;
  box-shadow:var(--l3);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,198,174,.35),0 20px 42px -16px rgba(23,198,174,.5);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  border-color:var(--line);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.nav-cta{height:40px;padding:0 20px;font-size:14px;}

.burger{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-1);
  font-size:17px;
  cursor:pointer;
}
.burger:hover{border-color:var(--brand);color:var(--brand);}
.mobile-search{display:none;padding-bottom:14px;}
.drawer{display:none;}

/* ============ 面包屑 / 页头 ============ */
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.crumb a:hover{color:var(--brand);}
.crumb .sep{opacity:.5;}
.crumb .current{color:var(--text-1);}

.page-head{
  position:relative;
  padding:56px 0 48px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(680px 320px at 12% -20%,rgba(23,198,174,.10),transparent 70%),
    var(--bg-0);
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;
  left:0;bottom:-1px;
  width:180px;height:2px;
  background:linear-gradient(90deg,var(--brand),transparent);
}
.head-grid{display:flex;flex-wrap:wrap;align-items:center;gap:40px;}
.head-copy{flex:1 1 520px;min-width:0;}
.head-figure{flex:0 0 38%;max-width:38%;}
.head-figure img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--l2);
  filter:saturate(1.05) brightness(.92);
}
.head-lead{
  margin-top:16px;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text-2);
  max-width:640px;
}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 14px;
  font-size:12.5px;
  line-height:1.6;
  border-radius:var(--r-pill);
  background:var(--bg-3);
  color:var(--sub);
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.tag:hover{background:rgba(23,198,174,.10);color:var(--brand);border-color:var(--line-strong);}
.tag-accent{background:rgba(242,178,62,.12);color:var(--accent);}

/* ============ 通用玻璃与标题 ============ */
.glass{
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-radius:var(--r-lg);
}
.section-head{max-width:720px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--brand);
  margin-bottom:14px;
  font-family:var(--font-num);
}
.eyebrow::before{
  content:"";
  width:28px;height:2px;
  background:var(--accent);
  border-radius:2px;
}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;}

/* ============ 时间轴 ============ */
.timeline-wrap{position:relative;}
.timeline{
  position:relative;
  padding-left:34px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:6px;top:10px;bottom:26px;
  width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(23,198,174,.06));
}
.timeline-item{
  position:relative;
  padding-bottom:34px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-34px;top:9px;
  width:14px;height:14px;
  border-radius:50%;
  background:var(--bg-0);
  border:2px solid var(--brand);
  box-shadow:0 0 0 4px rgba(23,198,174,.10);
  transition:box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.timeline-item:hover::before{box-shadow:0 0 0 6px rgba(23,198,174,.18);}
.tl-index{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:12.5px;
  letter-spacing:.18em;
  color:var(--text-3);
  margin-bottom:6px;
}
.timeline-item h3{font-size:20px;margin-bottom:8px;}
.timeline-item h3 a:hover{color:var(--brand);}
.timeline-item p{font-size:15px;line-height:1.8;color:var(--text-2);margin-bottom:14px;}
.tl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.tl-time{
  font-size:12.5px;
  color:var(--text-3);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  display:inline-flex;
  align-items:center;
  gap:6px;
}

/* ============ 侧栏卡 ============ */
.side-card{
  position:sticky;
  top:100px;
  padding:26px;
}
.side-card h3{font-size:18px;margin-bottom:12px;}
.side-card > p{font-size:14.5px;line-height:1.8;color:var(--text-2);}
.stat-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  margin:22px 0;
  padding:20px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:30px;
  font-weight:700;
  line-height:1.1;
  color:var(--brand);
}
.stat-num small{font-size:14px;color:var(--text-3);margin-left:2px;font-weight:600;}
.stat-label{font-size:12.5px;color:var(--text-3);margin-top:4px;line-height:1.6;}
.side-sub{font-size:12.5px;letter-spacing:.14em;color:var(--text-3);margin-bottom:10px;font-family:var(--font-num);}
.side-links{display:flex;flex-direction:column;gap:2px;}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:11px 0;
  font-size:14.5px;
  color:var(--text-2);
  border-bottom:1px dashed rgba(255,255,255,.07);
}
.side-links a:last-child{border-bottom:0;}
.side-links a i{font-size:12px;color:var(--text-3);transition:transform .2s var(--ease),color .2s var(--ease);}
.side-links a:hover{color:var(--brand);}
.side-links a:hover i{color:var(--brand);transform:translateX(3px);}

/* ============ 处理顺序 ============ */
.steps-band{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:0;
  overflow:hidden;
  border-radius:var(--r-xl);
  border:1px solid var(--line);
  background:var(--bg-1);
}
.steps-figure{position:relative;min-height:280px;}
.steps-figure img{
  width:100%;height:100%;
  object-fit:cover;
  position:absolute;inset:0;
  filter:brightness(.78) saturate(1.05);
}
.steps-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,15,22,.15) 0%,rgba(6,15,22,.85) 100%);
}
.steps-body{padding:38px 34px;}
.steps-body h2{font-size:26px;margin-bottom:10px;}
.steps-body > p{font-size:15px;color:var(--text-2);}
.step-list{margin-top:24px;display:flex;flex-direction:column;gap:18px;}
.step-item{display:flex;gap:16px;align-items:flex-start;}
.step-no{
  flex:0 0 34px;
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:rgba(23,198,174,.12);
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:14px;
  font-weight:700;
}
.step-item h4{margin-bottom:4px;}
.step-item p{font-size:14.5px;line-height:1.75;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  min-height:60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 0;
  background:transparent;
  border:0;
  text-align:left;
  color:var(--text-1);
  font-size:16px;
  font-weight:600;
  line-height:1.5;
  cursor:pointer;
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-q .fi{
  flex:0 0 auto;
  width:24px;height:24px;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--brand);
  font-size:11px;
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.faq-item.is-open .faq-q .fi{transform:rotate(180deg);border-color:var(--line-strong);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-item.is-open .faq-a{max-height:260px;}
.faq-a p{
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  padding:0 0 18px 0;
  margin:0;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  padding:44px;
  border-radius:var(--r-xl);
  overflow:hidden;
  background:
    radial-gradient(560px 260px at 88% -30%,rgba(23,198,174,.18),transparent 70%),
    rgba(255,255,255,.045);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;}
.cta-copy{flex:1 1 460px;min-width:0;}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-copy p{font-size:15px;color:var(--text-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:20px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
}
.foot-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
  border-bottom:1px solid var(--line);
}
.foot-brand .brand{margin-bottom:16px;}
.foot-brand p{font-size:14px;line-height:1.85;color:var(--text-3);max-width:320px;}
.foot-col h4{
  font-size:14px;
  color:var(--text-1);
  margin-bottom:16px;
  letter-spacing:.04em;
}
.foot-col ul{display:flex;flex-direction:column;gap:11px;}
.foot-col a,
.foot-col span{font-size:14px;color:var(--text-3);}
.foot-col a{display:inline-flex;align-items:center;gap:8px;transition:color .2s var(--ease),transform .2s var(--ease);}
.foot-col a:hover{color:var(--brand);transform:translateX(2px);}
.foot-col a i{font-size:11px;opacity:.7;}
.foot-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
}
.foot-bottom .domain{font-family:var(--font-num);letter-spacing:.04em;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .header-inner{gap:18px;grid-template-columns:auto minmax(240px,36%) auto;}
  .nav-links{gap:15px;}
  .nav-links a{font-size:14px;}
  .nav-cta{height:36px;padding:0 14px;font-size:13px;}
  .head-figure{flex:0 0 34%;max-width:34%;}
}

@media (max-width:1023px){
  .container{padding:0 24px;}
  .header-inner{grid-template-columns:1fr auto;min-height:66px;gap:12px;}
  .nav-search,.nav-links{display:none;}
  .burger{display:inline-flex;}
  .mobile-search{display:block;}
  .drawer{
    display:none;
    padding:8px 0 20px;
    border-top:1px solid var(--line);
    margin-top:6px;
  }
  .drawer.is-open{display:block;}
  .drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:18px;}
  .drawer-nav a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:48px;
    padding:12px 4px;
    font-size:15.5px;
    color:var(--text-2);
    border-bottom:1px solid rgba(255,255,255,.06);
  }
  .drawer-nav a i{font-size:12px;color:var(--text-3);}
  .drawer-nav a.is-active{color:var(--brand);}
  .drawer-cta{width:100%;margin-top:18px;border-bottom:0;}
  .section{padding:64px 0;}
  .head-grid{gap:30px;}
  .head-figure{flex:0 0 100%;max-width:100%;}
  .head-figure img{aspect-ratio:16/8;}
  .side-card{position:static;margin-top:34px;}
  .steps-band{grid-template-columns:1fr;}
  .steps-figure{min-height:190px;position:relative;}
  .faq-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:639px){
  .container{padding:0 18px;}
  .section{padding:52px 0;}
  .page-head{padding:38px 0 34px;}
  body{font-size:16px;}
  .head-lead{font-size:15.5px;}
  .brand-mark{width:38px;height:38px;font-size:17px;border-radius:11px;}
  .brand-text strong{font-size:16px;}
  .search-form{height:44px;padding-left:40px;}
  .search-form > i{left:14px;}
  .search-form button{height:34px;padding:0 15px;font-size:13.5px;}
  .btn{height:46px;padding:0 22px;font-size:15px;}
  .btn-sm{height:42px;font-size:14px;}
  .timeline{padding-left:28px;}
  .timeline::before{left:5px;}
  .timeline-item::before{left:-28px;width:12px;height:12px;}
  .timeline-item h3{font-size:18px;}
  .stat-list{grid-template-columns:1fr 1fr;gap:16px;}
  .stat-num{font-size:26px;}
  .steps-body{padding:26px 20px;}
  .steps-body h2{font-size:22px;}
  .cta-band{padding:28px 22px;}
  .cta-actions .btn{width:100%;}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .site-footer{padding:48px 0 22px;}
  .faq-q{font-size:15.5px;}
}