/* roulang page: index */
:root{
  --bg-0:#0A0E12;
  --bg-1:#10171E;
  --surface:#16202A;
  --surface-2:#1E2A35;
  --primary:#2ED3B7;
  --primary-deep:#14A98F;
  --accent:#FF8A3D;
  --ink:#E9F0F4;
  --ink-2:#A7B6C2;
  --ink-3:#6E8090;
  --line:rgba(255,255,255,.08);
  --paper:#F6F8F9;
  --paper-ink:#1B2A33;
  --success:#3FCF8E;
  --warning:#F2C14E;
  --error:#FF6B6B;
  --radius-card:16px;
  --radius-img:14px;
  --radius-input:12px;
  --radius-btn:999px;
  --shadow:0 20px 40px -20px rgba(0,0,0,.6);
  --shadow-hover:0 28px 56px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-family:Inter,"HarmonyOS Sans SC",system-ui,sans-serif;font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section--alt{background:var(--bg-1)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{
  position:relative;
  padding-left:16px;
  font-size:30px;
  line-height:1.3;
  font-weight:700;
  letter-spacing:-.01em;
}
.section-head h2::before{
  content:"";
  position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--primary-deep));
}
.eyebrow{
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:10px;font-weight:600;
}
.section-head p{color:var(--ink-2);font-size:15px;max-width:600px;margin-top:10px}
.more-link{
  display:inline-flex;align-items:center;gap:8px;color:var(--primary);
  font-size:14px;font-weight:600;white-space:nowrap;transition:gap 200ms var(--ease),color 200ms var(--ease);
}
.more-link:hover{gap:12px;color:#5BE7CE}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,18,.6);
  border-bottom:1px solid transparent;
  transition:background 240ms var(--ease),border-color 240ms var(--ease),backdrop-filter 240ms var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,14,18,.82);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.01em}
.logo__mark{
  width:34px;height:34px;border-radius:11px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--primary),var(--primary-deep));
  display:grid;place-items:center;color:#06231E;
  box-shadow:0 8px 18px -10px rgba(46,211,183,.9);
}
.logo__mark svg{width:19px;height:19px}
.logo span b{color:var(--primary);font-weight:800}
.nav__links{display:flex;align-items:center;gap:6px}
.nav__links a{
  position:relative;padding:10px 15px;border-radius:10px;
  font-size:15px;color:var(--ink-2);font-weight:500;
  transition:color 200ms var(--ease),background 200ms var(--ease);
}
.nav__links a::after{
  content:"";position:absolute;left:15px;right:15px;bottom:5px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform 220ms var(--ease);
}
.nav__links a:hover{color:var(--ink);background:rgba(255,255,255,.04)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__links a.is-active{color:var(--primary);font-weight:600;background:rgba(46,211,183,.1)}
.nav__links a.is-active::after{transform:scaleX(1)}
.nav__actions{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-btn);
  padding:12px 24px;font-size:15px;font-weight:600;cursor:pointer;
  min-height:44px;line-height:1;
  transition:transform 200ms var(--ease),background 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease),color 200ms var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn svg{width:16px;height:16px}
.btn--primary{background:var(--primary);color:#06231E;box-shadow:0 14px 28px -16px rgba(46,211,183,.9)}
.btn--primary:hover{background:#4BE0C6;box-shadow:0 18px 34px -16px rgba(46,211,183,.95)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.02)}
.btn--ghost:hover{border-color:rgba(46,211,183,.5);color:var(--primary)}
.btn--ghost-dark{border-color:rgba(255,255,255,.22);color:#06231E;background:transparent}
.btn--sm{padding:10px 18px;font-size:14px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  cursor:pointer;align-items:center;justify-content:center;
}
.nav-toggle svg{width:20px;height:20px}
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(10,14,18,.98);
  padding:24px 20px 32px;display:flex;flex-direction:column;
  transform:translateY(-12px);opacity:0;pointer-events:none;
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px}
.drawer__close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:transparent;cursor:pointer;display:grid;place-items:center}
.drawer nav{display:flex;flex-direction:column;gap:6px;flex:1}
.drawer nav a{
  font-size:22px;font-weight:700;padding:16px 4px;border-bottom:1px solid var(--line);
  color:var(--ink);transition:color 200ms var(--ease)
}
.drawer nav a:hover,.drawer nav a.is-active{color:var(--primary)}
.drawer .btn{width:100%}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:78vh;
  display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 0% 50%, rgba(4,8,11,.94) 0%, rgba(4,8,11,.72) 42%, rgba(4,8,11,.35) 68%, rgba(4,8,11,.15) 100%),
    linear-gradient(180deg, rgba(4,8,11,.72) 0%, rgba(4,8,11,.42) 38%, rgba(4,8,11,.9) 100%);
}
.hero__inner{position:relative;z-index:2;padding:96px 0 88px}
.hero__grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:center}
.hero__brand{
  display:inline-flex;align-items:center;gap:10px;padding:7px 16px 7px 12px;
  border:1px solid rgba(46,211,183,.35);border-radius:999px;
  background:rgba(46,211,183,.08);color:var(--primary);
  font-size:13px;font-weight:600;letter-spacing:.02em;margin-bottom:22px;
}
.hero__brand i{width:7px;height:7px;border-radius:50%;background:var(--primary);display:block;box-shadow:0 0 0 4px rgba(46,211,183,.18)}
.hero h1{
  font-size:52px;line-height:1.15;font-weight:800;letter-spacing:-.02em;
  margin-bottom:20px;max-width:15ch;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero__sub{font-size:18px;color:var(--ink-2);max-width:52ch;margin-bottom:32px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.hero__stats{
  display:flex;flex-wrap:wrap;gap:14px 40px;padding-top:26px;
  border-top:1px solid var(--line);
}
.hero__stat b{display:block;font-size:26px;font-weight:800;color:var(--accent);letter-spacing:-.01em}
.hero__stat span{font-size:13px;color:var(--ink-3)}
.float-card{
  background:linear-gradient(180deg,rgba(30,42,53,.92),rgba(22,32,42,.92));
  border:1px solid var(--line);border-radius:var(--radius-card);
  padding:16px;box-shadow:var(--shadow);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.float-card:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.32)}
.float-card__media{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:16/9}
.float-card__media img{width:100%;height:100%;object-fit:cover}
.float-card__tag{
  position:absolute;top:10px;left:10px;padding:4px 10px;border-radius:999px;
  background:rgba(10,14,18,.78);color:var(--primary);font-size:12px;font-weight:600;
}
.float-card h3{font-size:17px;font-weight:700;margin:14px 0 8px;line-height:1.5}
.float-card p{font-size:14px;color:var(--ink-2);margin-bottom:14px}
.float-card a{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;gap:6px;align-items:center}
.float-card a:hover{gap:10px}

/* ---------- Buttons / badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;
  background:rgba(46,211,183,.12);color:var(--primary);border:1px solid rgba(46,211,183,.24);
}
.badge--orange{background:rgba(255,138,61,.12);color:var(--accent);border-color:rgba(255,138,61,.28)}
.badge--muted{background:rgba(255,255,255,.05);color:var(--ink-2);border-color:var(--line)}

/* ---------- Stories rail ---------- */
.rail-wrap{position:relative}
.rail{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 2px 22px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none}
.rail__item{flex:0 0 calc(100% / 3.5 - 18px);scroll-snap-align:start}
.rail-nav{
  position:absolute;top:-72px;right:0;display:flex;gap:10px;
}
.rail-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:rgba(255,255,255,.03);color:var(--ink-2);cursor:pointer;
  display:grid;place-items:center;transition:all 200ms var(--ease)
}
.rail-btn:hover{border-color:var(--primary);color:var(--primary);background:rgba(46,211,183,.08)}
.rail-btn svg{width:18px;height:18px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;height:100%;display:flex;flex-direction:column;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.32);box-shadow:var(--shadow-hover)}
.card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.card:hover .card__media img{transform:scale(1.04)}
.card__corner{
  position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:999px;
  background:rgba(10,14,18,.8);color:var(--accent);font-size:12px;font-weight:600;
  border:1px solid rgba(255,138,61,.3);
}
.card__time{
  position:absolute;right:12px;bottom:12px;padding:3px 9px;border-radius:8px;
  background:rgba(10,14,18,.78);color:var(--ink-2);font-size:12px;
}
.card__body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card__body h3{font-size:19px;font-weight:700;line-height:1.45;transition:color 220ms var(--ease)}
.card:hover .card__body h3{color:var(--primary)}
.card__body p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card__meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-3);padding-top:6px}

/* ---------- Feature (1 large + 2 rows) ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.feature-main{position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);min-height:420px;display:flex;align-items:flex-end}
.feature-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 520ms var(--ease)}
.feature-main:hover img{transform:scale(1.04)}
.feature-main::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,18,.1) 25%,rgba(10,14,18,.92) 100%)}
.feature-main__body{position:relative;z-index:2;padding:32px}
.feature-main__body h3{font-size:26px;font-weight:800;line-height:1.35;margin:14px 0 12px;letter-spacing:-.01em}
.feature-main__body p{color:var(--ink-2);font-size:15px;max-width:56ch;margin-bottom:16px}
.feature-main__body a{color:var(--primary);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:8px}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.row-card{
  display:grid;grid-template-columns:150px 1fr;gap:18px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:14px;transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease)
}
.row-card:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.32);box-shadow:var(--shadow-hover)}
.row-card__media{border-radius:12px;overflow:hidden;aspect-ratio:16/11;background:var(--surface-2)}
.row-card__media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.row-card:hover .row-card__media img{transform:scale(1.05)}
.row-card h3{font-size:17px;font-weight:700;line-height:1.45;margin:8px 0 6px}
.row-card p{font-size:13.5px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Topic grid ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.topic{
  position:relative;border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:4/3;display:flex;align-items:flex-end;background:var(--surface-2)
}
.topic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 480ms var(--ease)}
.topic:hover img{transform:scale(1.04)}
.topic::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,18,.05) 30%,rgba(10,14,18,.9) 100%)}
.topic__body{position:relative;z-index:2;padding:20px}
.topic__body h3{font-size:18px;font-weight:700;margin-bottom:6px}
.topic__body span{font-size:13px;color:var(--ink-2)}
.topic__count{
  position:absolute;top:12px;right:12px;z-index:2;
  padding:4px 10px;border-radius:999px;background:rgba(10,14,18,.75);
  font-size:12px;color:var(--ink);border:1px solid var(--line);
}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;display:flex;flex-direction:column;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease)
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.32);box-shadow:var(--shadow-hover)}
.news-card h3{font-size:18px;font-weight:700;line-height:1.5;margin-bottom:10px;transition:color 220ms var(--ease)}
.news-card:hover h3{color:var(--primary)}
.news-card p{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.news-card__meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-3);padding-top:14px;border-top:1px solid var(--line)}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 20px;border:1px dashed var(--line);border-radius:var(--radius-card);
  color:var(--ink-2);background:rgba(255,255,255,.02)
}
.empty-state svg{width:44px;height:44px;margin:0 auto 14px;color:var(--ink-3)}

/* ---------- Trust ---------- */
.trust{display:flex;flex-wrap:wrap;gap:16px 44px;align-items:center;justify-content:space-between;padding:26px 28px;border:1px solid var(--line);border-radius:var(--radius-card);background:rgba(255,255,255,.02)}
.trust span{font-size:14px;color:var(--ink-3);letter-spacing:.04em;filter:grayscale(1);opacity:.75;transition:opacity 200ms var(--ease),color 200ms var(--ease)}
.trust span:hover{opacity:1;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq{max-width:900px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:44px;padding:20px 0;font-size:17px;font-weight:600;transition:color 200ms var(--ease)
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--primary)}
.faq summary .icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;position:relative;transition:transform 240ms var(--ease),border-color 240ms var(--ease)
}
.faq summary .icon::before,.faq summary .icon::after{
  content:"";position:absolute;background:var(--ink-2);transition:background 240ms var(--ease)
}
.faq summary .icon::before{width:11px;height:1.6px}
.faq summary .icon::after{width:1.6px;height:11px}
.faq details[open] summary .icon{transform:rotate(90deg);border-color:rgba(46,211,183,.5)}
.faq details[open] summary .icon::after{opacity:0}
.faq details[open] summary .icon::before{background:var(--primary)}
.faq .answer{padding:0 0 22px;max-width:72ch;font-size:15px;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--surface) 0%,#121C25 60%,#0F1A22 100%);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:72px 0;
}
.cta-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center}
.cta-grid h2{font-size:32px;font-weight:800;line-height:1.3;letter-spacing:-.01em;margin-bottom:14px}
.cta-grid p{color:var(--ink-2);font-size:16px;max-width:48ch}
.cta-points{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cta-points li{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);
  padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.02)
}
.cta-points svg{width:15px;height:15px;color:var(--primary)}
.lead-form{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow)}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--ink-2);margin-bottom:8px;font-weight:600}
.field input,.field textarea{
  width:100%;background:#0E151B;border:1px solid var(--line);border-radius:var(--radius-input);
  padding:13px 14px;font-size:15px;min-height:46px;
  transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease)
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(46,211,183,.2)
}
.lead-form .btn{width:100%}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:12px;text-align:center}
.form-msg{font-size:14px;color:var(--success);margin-top:12px;text-align:center;display:none}
.form-msg.is-show{display:block}

/* ---------- Footer ---------- */
.site-footer{background:#070B0F;border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-grid > div + div{border-left:1px solid var(--line);padding-left:40px}
.footer-brand p{color:var(--ink-2);font-size:14px;margin-top:14px;max-width:34ch}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--ink-2);transition:color 200ms var(--ease),transform 200ms var(--ease);display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-2);margin-bottom:12px}
.footer-contact svg{width:18px;height:18px;flex:0 0 auto;color:var(--primary);margin-top:4px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3)
}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:rgba(22,32,42,.9);color:var(--ink-2);cursor:pointer;
  display:grid;place-items:center;opacity:0;pointer-events:none;
  transition:opacity 240ms var(--ease),transform 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease)
}
.to-top.is-show{opacity:1;pointer-events:auto}
.to-top:hover{color:var(--primary);border-color:rgba(46,211,183,.5);transform:translateY(-3px)}
.to-top svg{width:18px;height:18px}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
  .hero h1{font-size:44px}
  .rail__item{flex:0 0 calc(100% / 2.2 - 14px)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .nav__links{display:none}
  .nav__actions .btn--ghost{display:none}
  .nav-toggle{display:flex}
  .hero{min-height:72vh}
  .hero__grid{grid-template-columns:1fr;gap:36px}
  .hero h1{max-width:22ch}
  .float-card{max-width:520px}
  .feature-grid{grid-template-columns:1fr}
  .feature-main{min-height:360px}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid > div + div{border-left:0;padding-left:0}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .section-head h2{font-size:23px}
  .hero{min-height:64vh}
  .hero__inner{padding:72px 0 64px}
  .hero h1{font-size:31px}
  .hero__sub{font-size:16px}
  .hero__stats{gap:12px 26px}
  .hero__stat b{font-size:22px}
  .rail-nav{display:none}
  .rail__item{flex:0 0 82%}
  .topic-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .row-card{grid-template-columns:110px 1fr;gap:14px}
  .row-card h3{font-size:16px}
  .cta-grid h2{font-size:24px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:16px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .card:hover,.news-card:hover,.row-card:hover,.float-card:hover,.topic:hover img,.card:hover .card__media img,.feature-main:hover img,.row-card:hover .row-card__media img{transform:none}
}

/* roulang page: article */
:root{
  --bg-0:#0A0E12;
  --bg-1:#10171E;
  --surface:#16202A;
  --surface-2:#1E2A35;
  --primary:#2ED3B7;
  --primary-deep:#14A98F;
  --accent:#FF8A3D;
  --ink:#E9F0F4;
  --ink-2:#A7B6C2;
  --ink-3:#6E8090;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --paper:#F6F8F9;
  --paper-ink:#1B2A33;
  --paper-ink-2:#4A5C68;
  --paper-line:#E3E9ED;
  --paper-link:#0C7F6C;
  --success:#3FCF8E;
  --warning:#F2C14E;
  --error:#FF6B6B;
  --radius-card:16px;
  --radius-img:14px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-1:0 20px 40px -20px rgba(0,0,0,.6);
  --shadow-2:0 28px 56px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --transition:200ms cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--transition),opacity var(--transition)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
svg{width:100%;height:100%;display:block}
::selection{background:rgba(46,211,183,.3)}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media(min-width:1440px){.container{max-width:1320px}}
@media(max-width:768px){.container{padding:0 20px}}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,14,18,.72);
  border-bottom:1px solid transparent;
  transition:background var(--transition),border-color var(--transition),backdrop-filter var(--transition);
}
.site-header.is-scrolled{
  background:rgba(10,14,18,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.logo b{color:var(--primary);font-weight:800}
.logo__mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  display:grid;place-items:center;padding:7px;
  color:var(--primary);
  background:linear-gradient(160deg,rgba(46,211,183,.18),rgba(46,211,183,.04));
  border:1px solid rgba(46,211,183,.32);
}
.nav__links{display:flex;align-items:center;gap:6px;margin-left:8px;flex:1 1 auto}
.nav__links a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  font-size:15px;color:var(--ink-2);border-radius:var(--radius-pill);
}
.nav__links a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:8px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform var(--transition);border-radius:2px;
}
.nav__links a:hover{color:var(--ink);background:rgba(255,255,255,.04)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__links a.is-active{color:var(--ink);background:rgba(46,211,183,.12)}
.nav__links a.is-active::after{transform:scaleX(1)}
.nav__actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  display:none;width:44px;height:44px;padding:11px;border-radius:12px;
  border:1px solid var(--line-strong);color:var(--ink);
}
.nav-toggle:hover{border-color:rgba(46,211,183,.5);color:var(--primary)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;transition:all var(--transition);
}
.btn svg{width:16px;height:16px;flex:0 0 16px}
.btn--sm{min-height:40px;padding:0 18px;font-size:14px}
.btn--primary{background:var(--primary);color:#04201B;box-shadow:0 12px 26px -14px rgba(46,211,183,.9)}
.btn--primary:hover{filter:brightness(1.08);border-color:rgba(46,211,183,.6)}
.btn--primary:active{transform:translateY(1px)}
.btn--ghost{border-color:var(--line-strong);color:var(--ink)}
.btn--ghost:hover{border-color:rgba(46,211,183,.55);color:var(--primary);background:rgba(46,211,183,.06)}
.btn--ghost:active{transform:translateY(1px)}
.btn--paper{background:#0F8F79;color:#F2FBF8}
.btn--paper:hover{background:#12A188}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:72px 0 0 0;z-index:70;
  background:rgba(10,14,18,.97);
  padding:28px 20px 100px;
  display:none;overflow-y:auto;
}
.drawer.is-open{display:block}
.drawer a{
  display:block;padding:16px 4px;font-size:20px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer a:hover{color:var(--primary)}
.drawer__foot{position:fixed;left:20px;right:20px;bottom:20px}
.drawer__foot .btn{width:100%}

/* ---------- breadcrumb ---------- */
.crumbs{padding:26px 0 0;font-size:13px;color:var(--ink-3)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:inline-flex;align-items:center;gap:8px;min-width:0}
.crumbs li+li::before{content:"/";color:var(--ink-3)}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--primary)}
.crumbs .now{
  color:var(--ink-2);max-width:46vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- article head ---------- */
.article-head{padding:26px 0 0}
.badge{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;
  border-radius:var(--radius-pill);font-size:12.5px;font-weight:600;letter-spacing:.02em;
  background:rgba(46,211,183,.14);color:var(--primary);border:1px solid rgba(46,211,183,.3);
}
.article-head h1{
  margin:18px 0 0;font-size:clamp(28px,3.6vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.02em;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:20px;padding-bottom:22px;border-bottom:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;font-variant-numeric:tabular-nums}
.article-meta svg{width:15px;height:15px;color:var(--primary)}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3)}

.article-cover{
  margin:32px 0 0;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-1);aspect-ratio:16/9;background:var(--surface-2);
}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ---------- layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr);gap:44px;
  padding:40px 0 0;align-items:start;
}
@media(min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 304px;gap:48px}
}
.article-main{max-width:780px;margin:0 auto;width:100%}

/* ---------- reading panel ---------- */
.article-body{
  background:var(--paper);color:var(--paper-ink);
  border-radius:18px;padding:44px 46px;
  box-shadow:var(--shadow-1);
  font-size:16px;line-height:1.85;
  word-break:break-word;
}
.article-body>*+*{margin-top:18px}
.article-body h2{
  font-size:24px;line-height:1.35;color:#12222B;margin-top:38px;
  border-left:4px solid var(--primary-deep);padding-left:14px;
}
.article-body h3{font-size:19px;color:#12222B;margin-top:28px;font-weight:700}
.article-body h4{font-size:17px;color:#12222B;margin-top:22px}
.article-body p{color:#2B3B45}
.article-body strong{color:#12222B}
.article-body a{color:var(--paper-link);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#0A6A5A}
.article-body ul{list-style:none;padding-left:2px}
.article-body ul>li{position:relative;padding-left:20px;margin-top:10px;color:#2B3B45}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.75em;width:7px;height:7px;border-radius:50%;
  background:var(--primary-deep);
}
.article-body ol{list-style:decimal;padding-left:22px}
.article-body ol>li{margin-top:10px;color:#2B3B45;padding-left:4px}
.article-body ol>li::marker{color:var(--primary-deep);font-weight:700}
.article-body blockquote{
  margin-top:24px;padding:16px 20px;background:#EDF2F4;border-left:3px solid var(--primary-deep);
  border-radius:0 12px 12px 0;color:#33454F;
}
.article-body img{border-radius:12px;margin:24px auto;max-width:100%;height:auto}
.article-body table{width:100%;border-collapse:collapse;margin-top:22px;font-size:15px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--paper-line);padding:10px 14px;text-align:left;white-space:nowrap}
.article-body th{background:#EAEFF2;color:#12222B;font-weight:600}
.article-body code{
  background:#E7EDF0;border-radius:6px;padding:2px 6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#0C5A4E;
}
.article-body hr{border:0;border-top:1px solid var(--paper-line);margin:32px 0}

.empty-state{
  background:var(--surface);border:1px dashed var(--line-strong);border-radius:18px;
  padding:64px 32px;text-align:center;
}
.empty-state svg{width:48px;height:48px;margin:0 auto 18px;color:var(--ink-3)}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--ink-2);font-size:15px;margin-bottom:24px}

/* ---------- tags & foot ---------- */
.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  margin-top:28px;padding-top:24px;border-top:1px solid var(--line);
}
.chips{display:flex;flex-wrap:wrap;gap:10px;flex:1 1 240px}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--radius-pill);
  font-size:13px;color:var(--ink-2);background:var(--surface-2);border:1px solid var(--line);
  transition:all var(--transition);
}
.chip:hover{color:var(--primary);border-color:rgba(46,211,183,.4);transform:translateY(-2px)}
.pager{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;font-size:14.5px}
.pager a{
  display:inline-flex;align-items:center;gap:8px;color:var(--ink-2);
  border-bottom:1px solid transparent;
}
.pager a:hover{color:var(--primary);border-bottom-color:rgba(46,211,183,.5)}
.pager svg{width:15px;height:15px}

/* ---------- aside ---------- */
.article-aside{display:grid;gap:20px}
@media(min-width:1280px){
  .article-aside{position:sticky;top:96px}
}
.aside-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 22px 20px;box-shadow:var(--shadow-1);
}
.aside-card h3{font-size:16px;display:flex;align-items:center;gap:9px}
.aside-card h3::before{content:"";width:3px;height:15px;border-radius:3px;background:var(--primary)}
.aside-list{margin-top:14px;display:grid;gap:2px}
.aside-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  min-height:48px;padding:0 6px;border-bottom:1px solid var(--line);
  font-size:14.5px;color:var(--ink-2);
}
.aside-list li:last-child a{border-bottom:0}
.aside-list a:hover{color:var(--primary);transform:translateX(4px)}
.aside-list svg{width:14px;height:14px;flex:0 0 14px;color:var(--ink-3)}
.aside-cta{
  background:linear-gradient(150deg,rgba(46,211,183,.16),rgba(255,138,61,.08)),var(--surface-2);
  border:1px solid rgba(46,211,183,.24);
}
.aside-cta p{font-size:14px;color:var(--ink-2);margin-top:12px}
.aside-cta .btn{width:100%;margin-top:18px}

/* ---------- related ---------- */
.section{padding:88px 0 0}
@media(max-width:768px){.section{padding:56px 0 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head .eyebrow{
  display:block;font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);font-weight:600;
}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin-top:8px;position:relative;padding-left:16px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;background:var(--primary);
}
.section-head .more{font-size:14px;color:var(--ink-2);display:inline-flex;align-items:center;gap:6px}
.section-head .more:hover{color:var(--primary)}
.section-head .more svg{width:14px;height:14px}

.card-grid{display:grid;gap:22px;grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:1024px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.card-grid{grid-template-columns:1fr}}

.rcard{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;height:100%;
  transition:all var(--transition);
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(46,211,183,.32)}
.rcard__cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.rcard__cover img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease)}
.rcard:hover .rcard__cover img{transform:scale(1.04)}
.rcard__tag{
  position:absolute;left:12px;top:12px;height:26px;padding:0 10px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;
  background:rgba(10,14,18,.72);color:var(--primary);border:1px solid rgba(46,211,183,.35);
}
.rcard__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rcard__body h3{font-size:18px;line-height:1.45;transition:color var(--transition)}
.rcard:hover .rcard__body h3{color:var(--primary)}
.rcard__body p{
  font-size:14.5px;color:var(--ink-2);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rcard__meta{margin-top:auto;font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}

/* ---------- cta band ---------- */
.cta-band{
  margin-top:88px;background:linear-gradient(120deg,rgba(46,211,183,.14),rgba(10,14,18,0) 55%),var(--bg-1);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;padding:64px 0;align-items:center}
@media(max-width:1024px){.cta-inner{grid-template-columns:1fr;padding:52px 0}}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px)}
.cta-inner p{color:var(--ink-2);font-size:15px;margin-top:14px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.cta-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-1)}
.field{display:grid;gap:8px;margin-bottom:16px}
.field label{font-size:13.5px;color:var(--ink-2)}
.field input,.field textarea{
  width:100%;min-height:46px;padding:12px 14px;border-radius:var(--radius-input);
  background:#0E151B;border:1px solid var(--line);color:var(--ink);
  transition:border-color var(--transition),box-shadow var(--transition);
}
.field textarea{min-height:88px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(46,211,183,.2);
}
.cta-form .btn{width:100%}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:12px}
@media(max-width:520px){.cta-actions .btn{width:100%}}

/* ---------- footer ---------- */
.site-footer{margin-top:0;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 1.2fr;gap:36px;padding-bottom:44px}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr;gap:28px}}
.footer-brand p{color:var(--ink-2);font-size:14.5px;margin-top:16px;max-width:330px}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--ink)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14.5px;color:var(--ink-2);display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;color:var(--ink-2);font-size:14.5px}
.footer-contact svg{width:20px;height:20px;flex:0 0 20px;color:var(--primary);margin-top:3px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--ink-3);
}

/* ---------- back to top ---------- */
.back-top{
  position:fixed;right:22px;bottom:24px;z-index:60;
  width:46px;height:46px;border-radius:50%;padding:12px;
  background:var(--surface-2);border:1px solid var(--line-strong);color:var(--ink);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all var(--transition);
}
.back-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{color:var(--primary);border-color:rgba(46,211,183,.5)}

@media(prefers-reduced-motion:reduce){
  *{transition-duration:1ms !important;animation-duration:1ms !important}
  .rcard:hover{transform:none}
  .rcard:hover .rcard__cover img{transform:none}
}
@media(max-width:1024px){
  .nav__links,.nav__actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  .nav{height:68px}
  .drawer{inset:68px 0 0 0}
}

/* roulang page: category1 */
:root{
  --bg-0:#0A0E12;
  --bg-1:#10171E;
  --surface:#16202A;
  --surface-2:#1E2A35;
  --primary:#2ED3B7;
  --primary-deep:#14A98F;
  --accent:#FF8A3D;
  --ink:#E9F0F4;
  --ink-2:#A7B6C2;
  --ink-3:#6E8090;
  --line:rgba(255,255,255,.08);
  --paper:#F6F8F9;
  --paper-ink:#1B2A33;
  --paper-line:#E3E9ED;
  --success:#3FCF8E;
  --warn:#F2C14E;
  --danger:#FF6B6B;
  --radius:16px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 20px 40px -20px rgba(0,0,0,.6);
  --shadow-hover:0 28px 56px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --cwidth:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:var(--cwidth);margin:0 auto;padding:0 32px}
@media (min-width:1440px){:root{--cwidth:1320px}}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,14,18,.72);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),backdrop-filter .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,14,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;gap:28px;height:74px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.logo b{color:var(--primary);font-weight:800}
.logo__mark{
  width:36px;height:36px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,rgba(46,211,183,.22),rgba(46,211,183,.06));
  border:1px solid rgba(46,211,183,.36);
  color:var(--primary);
}
.logo__mark svg{width:20px;height:20px}
.nav__links{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav__links a{
  position:relative;padding:9px 14px;border-radius:var(--pill);
  font-size:15px;color:var(--ink-2);
}
.nav__links a:hover{color:var(--ink);background:rgba(255,255,255,.05)}
.nav__links a.is-active{color:var(--primary);background:rgba(46,211,183,.12)}
.nav__links a.is-active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:20px;height:2px;border-radius:2px;background:var(--primary);
}
.nav__cta-mobile{display:none}
.nav__actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:transparent;border:1px solid var(--line);color:var(--ink);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--pill);border:1px solid transparent;
  padding:13px 24px;font-size:15px;font-weight:600;letter-spacing:.01em;
  cursor:pointer;transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn svg{width:16px;height:16px;flex:none}
.btn--primary{background:var(--primary);color:#04211C;box-shadow:0 12px 26px -14px rgba(46,211,183,.75)}
.btn--primary:hover{background:#43ddc3;transform:translateY(-1px)}
.btn--primary:active{background:var(--primary-deep);transform:translateY(1px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:rgba(46,211,183,.55);color:var(--primary)}
.btn--sm{padding:9px 16px;font-size:14px}
.btn--lg{padding:15px 30px;font-size:16px}
.btn--block{width:100%}

/* ---------- Sub hero ---------- */
.subhero{
  position:relative;overflow:hidden;
  min-height:300px;display:flex;align-items:center;
  padding:78px 0 62px;
  background-color:var(--bg-1);
  background-image:
    radial-gradient(120% 130% at 8% 0%,rgba(10,14,18,.94),rgba(10,14,18,.6) 55%,rgba(10,14,18,.9) 100%),
    linear-gradient(180deg,rgba(10,14,18,.55),rgba(10,14,18,.95)),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover,cover,cover;
  background-position:center,center,center;
  border-bottom:1px solid var(--line);
}
.subhero__inner{max-width:820px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:18px}
.crumb a{color:var(--ink-2)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:var(--ink-3)}
.subhero h1{font-size:clamp(28px,3.4vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.18}
.subhero h1 em{font-style:normal;color:var(--primary)}
.subhero__lead{margin-top:18px;color:var(--ink-2);font-size:16px;max-width:760px}
.subhero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  margin-top:38px;padding-top:26px;border-top:1px solid var(--line);
}
.metric__k{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}
.metric__v{font-size:20px;font-weight:700;color:var(--ink);margin-top:4px}
.metric__v b{color:var(--accent);font-weight:700}

/* ---------- Sections ---------- */
main > section{padding:84px 0}
.sec-alt{background:var(--bg-1)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:42px}
.sec-head__label{display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--ink-3);text-transform:uppercase;margin-bottom:12px}
.sec-head__label::before{content:"";width:3px;height:16px;border-radius:3px;background:var(--primary)}
.sec-head h2{font-size:clamp(22px,2.4vw,30px);font-weight:700}
.sec-head p{color:var(--ink-2);font-size:15px;margin-top:10px;max-width:620px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;white-space:nowrap}
.text-link svg{width:15px;height:15px;transition:transform .2s var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- Alternating media rows ---------- */
.media-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:44px 0;
}
.media-row + .media-row{border-top:1px solid var(--line)}
.media-row__figure{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  aspect-ratio:16/10;background:var(--surface-2);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.media-row__figure img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.media-row:hover .media-row__figure{border-color:rgba(46,211,183,.3);box-shadow:var(--shadow-hover)}
.media-row:hover .media-row__figure img{transform:scale(1.04)}
.media-row__tag{
  position:absolute;top:14px;right:14px;z-index:2;
  padding:5px 12px;border-radius:var(--pill);font-size:12px;font-weight:600;
  background:rgba(10,14,18,.78);border:1px solid var(--line);color:var(--ink);
}
.media-row__body h3{font-size:clamp(19px,2vw,23px);font-weight:700;margin-bottom:14px}
.media-row__body p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px}
.media-row__body p:last-of-type{margin-bottom:20px}
.media-row--rev .media-row__figure{order:2}
.media-row--rev .media-row__body{order:1}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.step{
  position:relative;padding:26px 20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.step:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.3);box-shadow:var(--shadow)}
.step__no{
  font-size:13px;font-weight:700;color:var(--accent);
  font-variant-numeric:tabular-nums;letter-spacing:.14em;
}
.step h3{font-size:17px;margin:12px 0 8px}
.step p{font-size:14px;color:var(--ink-2);line-height:1.7}

/* ---------- Scenarios ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene{
  padding:26px 24px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.scene:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.3);box-shadow:var(--shadow)}
.scene__icon{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(46,211,183,.12);border:1px solid rgba(46,211,183,.28);color:var(--primary);
  margin-bottom:16px;
}
.scene__icon svg{width:20px;height:20px}
.scene h3{font-size:17px;margin-bottom:8px}
.scene p{font-size:14.5px;color:var(--ink-2)}

/* ---------- Deliverable panel ---------- */
.panel{
  border-radius:20px;border:1px solid var(--line);
  background:linear-gradient(180deg,var(--surface),rgba(22,32,42,.55));
  padding:44px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;
}
.panel h2{font-size:clamp(22px,2.3vw,28px);margin-bottom:14px}
.panel p{color:var(--ink-2);font-size:15.5px}
.check-list{display:grid;gap:12px;margin-top:22px}
.check-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2)}
.check-list svg{width:19px;height:19px;flex:none;margin-top:5px;color:var(--primary)}
.panel__figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3}
.panel__figure img{width:100%;height:100%;object-fit:cover}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.faq__item{border-bottom:1px solid var(--line)}
.faq__q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:16px 4px;font-size:16.5px;font-weight:600;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq__q:hover{color:var(--primary)}
.faq__icon{
  width:26px;height:26px;flex:none;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--ink-2);transition:transform .3s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.faq__icon svg{width:14px;height:14px}
.faq__item.is-open .faq__icon{transform:rotate(90deg);border-color:rgba(46,211,183,.5);color:var(--primary)}
.faq__panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s var(--ease)}
.faq__item.is-open .faq__panel{grid-template-rows:1fr}
.faq__panel > div{overflow:hidden}
.faq__panel p{color:var(--ink-2);font-size:15px;padding:0 4px 20px}

/* ---------- CTA ---------- */
.cta{
  position:relative;overflow:hidden;border-top:1px solid var(--line);
  background-color:var(--bg-1);
  background-image:
    linear-gradient(100deg,rgba(10,14,18,.96) 0%,rgba(10,14,18,.82) 52%,rgba(10,14,18,.7) 100%),
    url('/assets/images/backpic/back-3.png');
  background-size:cover,cover;
  background-position:center,center;
  padding:84px 0;
}
.cta__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.cta h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;margin-bottom:14px}
.cta p{color:var(--ink-2);font-size:15.5px;max-width:520px}
.cta__points{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:var(--pill);font-size:13px;
  background:rgba(46,211,183,.1);border:1px solid rgba(46,211,183,.26);color:var(--primary);
}
.form-card{
  background:rgba(16,23,30,.86);border:1px solid var(--line);
  border-radius:20px;padding:30px;box-shadow:var(--shadow);
}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card .hint{font-size:13.5px;color:var(--ink-3);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--ink-2);margin-bottom:8px}
.field input,.field textarea{
  width:100%;padding:13px 14px;border-radius:var(--radius-sm);
  background:#0E151B;border:1px solid var(--line);color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,211,183,.2);
}
.form-note{font-size:12.5px;color:var(--ink-3);margin-top:14px}

/* ---------- Cross links ---------- */
.cross{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.cross__card{
  border-radius:var(--radius);border:1px solid var(--line);
  background:var(--surface);padding:28px;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cross__card:hover{transform:translateY(-4px);border-color:rgba(46,211,183,.32);box-shadow:var(--shadow)}
.cross__card h3{font-size:19px;margin-bottom:10px}
.cross__card p{color:var(--ink-2);font-size:14.5px;margin-bottom:18px}

/* ---------- 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 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand p{color:var(--ink-2);font-size:14.5px;margin-top:16px;max-width:300px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--ink)}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--ink-2);font-size:14.5px;display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{display:flex;gap:10px;color:var(--ink-2);font-size:14.5px;line-height:1.6}
.footer-contact svg{width:20px;height:20px;flex:none;margin-top:4px;color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}

/* ---------- Back to top ---------- */
#backTop{
  position:fixed;right:22px;bottom:22px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface-2);border:1px solid var(--line);color:var(--ink);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),background .2s var(--ease),color .2s var(--ease),visibility .25s;
}
#backTop.is-show{opacity:1;visibility:visible;transform:translateY(0)}
#backTop:hover{background:var(--primary);color:#04211C;border-color:var(--primary)}
#backTop svg{width:20px;height:20px}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 26px}
  main > section{padding:64px 0}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .media-row{gap:36px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .panel{grid-template-columns:1fr;padding:34px}
  .cta__grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:860px){
  .nav__links{
    position:fixed;inset:74px 0 auto 0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(10,14,18,.98);
    border-bottom:1px solid var(--line);
    padding:18px 22px 26px;
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
    max-height:calc(100vh - 74px);overflow-y:auto;
  }
  .site-header.is-open .nav__links{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
  .nav__links a{padding:14px 12px;font-size:17px;border-radius:var(--radius-sm)}
  .nav__links a.is-active::after{display:none}
  .nav__cta-mobile{
    display:flex;margin-top:14px;width:100%;
    align-items:center;justify-content:center;gap:8px;
    padding:15px 20px;border-radius:var(--pill);
    background:var(--primary);color:#04211C;font-weight:700;font-size:16px;
  }
  .nav__cta-mobile svg{width:17px;height:17px}
  .nav-toggle{display:inline-flex}
  .nav__actions .btn--ghost{display:none}
  .nav__actions .btn--primary{display:none}
  .nav__actions{margin-left:auto}
  .media-row{grid-template-columns:1fr;gap:24px;padding:32px 0}
  .media-row--rev .media-row__figure{order:0}
  .media-row--rev .media-row__body{order:0}
  .subhero{min-height:0;padding:56px 0 48px}
  .cross{grid-template-columns:1fr}
}
@media (max-width:520px){
  .container{padding:0 20px}
  main > section{padding:52px 0}
  .metrics{grid-template-columns:1fr;gap:12px}
  .steps{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .subhero__actions .btn{width:100%}
  .panel{padding:26px}
  .cta{padding:58px 0}
  .form-card{padding:22px}
  .subhero h1{font-size:30px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .media-row:hover .media-row__figure img{transform:none}
  .step:hover,.scene:hover,.cross__card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bg-0:#0A0E12;
  --bg-1:#10171E;
  --surface:#16202A;
  --surface-2:#1E2A35;
  --primary:#2ED3B7;
  --primary-deep:#14A98F;
  --accent:#FF8A3D;
  --ink:#E9F0F4;
  --ink-2:#A7B6C2;
  --ink-3:#6E8090;
  --line:rgba(255,255,255,.08);
  --paper:#F6F8F9;
  --paper-ink:#1B2A33;
  --paper-line:#E3E9ED;
  --ok:#3FCF8E;
  --warn:#F2C14E;
  --err:#FF6B6B;
  --radius:16px;
  --radius-sm:12px;
  --pill:999px;
  --shadow:0 20px 40px -20px rgba(0,0,0,.6);
  --shadow-hover:0 28px 56px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--ink);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em}
p{margin:0}
svg{flex:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:8px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
@media (min-width:1440px){
  .container{max-width:1320px}
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),backdrop-filter .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,14,18,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav{
  display:flex;
  align-items:center;
  gap:20px;
  height:74px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.02em;
  white-space:nowrap;
}
.logo b{color:var(--primary);font-weight:800}
.logo__mark{
  width:36px;height:36px;
  display:grid;place-items:center;
  border-radius:11px;
  color:var(--primary);
  background:linear-gradient(150deg,rgba(46,211,183,.22),rgba(255,138,61,.14));
  border:1px solid rgba(46,211,183,.28);
}
.logo__mark svg{width:19px;height:19px}
.nav__links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:6px;
}
.nav__links a{
  padding:8px 15px;
  border-radius:var(--pill);
  font-size:15px;
  color:var(--ink-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav__links a:hover{color:var(--ink);background:rgba(255,255,255,.06)}
.nav__links a.is-active{
  color:#04120F;
  background:var(--primary);
  font-weight:600;
}
.nav__actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  color:var(--ink);
}
.nav-toggle svg{width:22px;height:22px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  white-space:nowrap;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn svg{width:17px;height:17px}
.btn--primary{background:var(--primary);color:#04120F;box-shadow:0 14px 30px -16px rgba(46,211,183,.8)}
.btn--primary:hover{background:#3FE0C4}
.btn--primary:active{transform:translateY(1px);background:var(--primary-deep)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:rgba(255,255,255,.03)}
.btn--ghost:hover{border-color:rgba(46,211,183,.5);color:var(--primary)}
.btn--ghost:active{transform:translateY(1px)}
.btn--sm{height:40px;padding:0 17px;font-size:14px}

/* ============ 页头 Hero ============ */
.page-hero{
  position:relative;
  min-height:300px;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero__bg{
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;
  background-position:center;
  opacity:.55;
}
.page-hero__veil{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,14,18,.62) 0%,rgba(10,14,18,.88) 62%,var(--bg-0) 100%),
             radial-gradient(120% 80% at 12% 30%,rgba(10,14,18,.7) 0%,rgba(10,14,18,0) 62%);
}
.page-hero .container{
  position:relative;
  z-index:2;
  padding-top:96px;
  padding-bottom:40px;
}
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13.5px;
  color:var(--ink-2);
  margin-bottom:16px;
}
.crumbs a{color:var(--ink-2);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--primary)}
.crumbs span.sep{color:var(--ink-3)}
.page-hero h1{
  font-size:clamp(28px,3.6vw,44px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.16;
  max-width:820px;
}
.page-hero__lead{
  margin-top:16px;
  max-width:760px;
  font-size:16px;
  line-height:1.9;
  color:var(--ink-2);
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:32px;
  padding:0 14px;
  border-radius:var(--pill);
  font-size:13.5px;
  color:var(--ink-2);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
}
.chip i{
  width:6px;height:6px;border-radius:50%;
  background:var(--primary);
  display:inline-block;
}
.chip--accent i{background:var(--accent)}

/* ============ 板块 ============ */
.section{padding:88px 0}
.section--tight{padding:64px 0}
.section--alt{background:var(--bg-1)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:36px;
}
.eyebrow{
  display:block;
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--primary);
  font-weight:600;
  margin-bottom:10px;
}
.section-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(22px,2.4vw,30px);
  font-weight:800;
  letter-spacing:-.015em;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.26em;
  width:3px;
  height:.86em;
  border-radius:2px;
  background:var(--primary);
}
.section-desc{
  margin-top:12px;
  max-width:640px;
  color:var(--ink-2);
  font-size:15px;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--primary);
  transition:gap .2s var(--ease),color .2s var(--ease);
}
.link-more svg{width:16px;height:16px}
.link-more:hover{gap:10px;color:#3FE0C4}

/* ============ 数据条 ============ */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(22,32,42,.9),rgba(16,23,30,.9));
  padding:26px 24px;
}
.stat{position:relative;padding-left:20px}
.stat::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),rgba(46,211,183,0));
}
.stat b{
  display:block;
  font-size:24px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
}
.stat b em{
  font-style:normal;
  color:var(--accent);
}
.stat span{display:block;margin-top:4px;font-size:13.5px;color:var(--ink-2)}

/* ============ 索引 + 卡片网格 ============ */
.ops-layout{
  display:grid;
  grid-template-columns:238px minmax(0,1fr);
  gap:36px;
  align-items:start;
}
.ops-index{
  position:sticky;
  top:98px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  padding:20px 16px;
  box-shadow:var(--shadow);
}
.ops-index h3{
  font-size:14px;
  letter-spacing:.08em;
  color:var(--ink-2);
  font-weight:700;
  padding:0 8px 12px;
  border-bottom:1px solid var(--line);
  margin-bottom:12px;
}
.ops-index li + li{margin-top:2px}
.ops-index a{
  display:block;
  padding:9px 12px;
  border-radius:10px;
  border-left:2px solid transparent;
  font-size:14.5px;
  color:var(--ink-2);
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.ops-index a:hover{color:var(--primary);background:rgba(46,211,183,.08);transform:translateX(3px)}
.ops-index a.is-current{
  color:var(--primary);
  border-left-color:var(--primary);
  background:rgba(46,211,183,.1);
  font-weight:600;
}
.ops-index__note{
  margin-top:16px;
  padding:14px;
  border-radius:var(--radius-sm);
  background:rgba(255,138,61,.08);
  border:1px solid rgba(255,138,61,.22);
  font-size:13.5px;
  color:var(--ink-2);
}
.ops-index__note b{color:var(--accent)}

.srv-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.srv-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.srv-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(46,211,183,.3);
}
.srv-card__media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--surface-2);
}
.srv-card__media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .45s var(--ease);
}
.srv-card:hover .srv-card__media img{transform:scale(1.04)}
.srv-card__tag{
  position:absolute;
  left:12px;top:12px;
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 11px;
  border-radius:var(--pill);
  font-size:12px;
  font-weight:600;
  color:#04120F;
  background:rgba(46,211,183,.92);
}
.srv-card__tag--accent{background:rgba(255,138,61,.94);color:#20120A}
.srv-card__body{
  display:flex;
  flex-direction:column;
  gap:10px;
  flex:1;
  padding:18px 20px 22px;
}
.srv-card__body h3{
  font-size:19px;
  font-weight:700;
  transition:color .2s var(--ease);
}
.srv-card:hover .srv-card__body h3{color:var(--primary)}
.srv-card__body p{
  color:var(--ink-2);
  font-size:14.5px;
  line-height:1.75;
}
.srv-card__list{
  display:grid;
  gap:6px;
  margin-top:auto;
  padding-top:6px;
}
.srv-card__list li{
  position:relative;
  padding-left:16px;
  font-size:13.5px;
  color:var(--ink-2);
}
.srv-card__list li::before{
  content:"";
  position:absolute;
  left:0;top:.68em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--primary);
}
.srv-card__foot{
  margin-top:8px;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--ink-3);
}

/* ============ 流程 ============ */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  counter-reset:flow;
}
.flow__item{
  position:relative;
  padding:26px 22px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  transition:border-color .22s var(--ease),transform .22s var(--ease),background .22s var(--ease);
}
.flow__item:hover{
  transform:translateY(-4px);
  border-color:rgba(46,211,183,.3);
  background:var(--surface-2);
}
.flow__num{
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--accent);
  margin-bottom:12px;
}
.flow__item h3{font-size:17.5px;margin-bottom:8px}
.flow__item p{color:var(--ink-2);font-size:14.5px;line-height:1.75}

/* ============ 图文区块 ============ */
.split{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:40px;
  align-items:center;
}
.split__media{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
  background:var(--surface-2);
}
.split__media img{width:100%;height:100%;object-fit:cover}
.split__media figcaption{
  position:absolute;
  left:16px;bottom:16px;
  right:16px;
  padding:10px 14px;
  border-radius:var(--radius-sm);
  font-size:13px;
  color:var(--ink);
  background:rgba(10,14,18,.72);
  backdrop-filter:blur(6px);
  border:1px solid var(--line);
}
.split h2{margin-bottom:14px}
.split p{color:var(--ink-2);font-size:15.5px}
.split p + p{margin-top:12px}
.check-list{display:grid;gap:12px;margin-top:22px}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  color:var(--ink);
}
.check-list svg{
  width:20px;height:20px;
  margin-top:4px;
  color:var(--primary);
}
.check-list span{color:var(--ink-2);font-size:14.5px;display:block;margin-top:4px}

/* ============ FAQ ============ */
.faq{
  border-top:1px solid var(--line);
  max-width:880px;
}
.faq__item{border-bottom:1px solid var(--line)}
.faq__q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:60px;
  padding:16px 4px;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.faq__q:hover{color:var(--primary)}
.faq__icon{
  position:relative;
  width:22px;height:22px;
  flex:none;
  border-radius:50%;
  border:1px solid var(--line);
  transition:transform .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.faq__icon::before,
.faq__icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--ink-2);
  transform:translate(-50%,-50%);
  transition:background .24s var(--ease),opacity .24s var(--ease);
}
.faq__icon::before{width:11px;height:1.6px}
.faq__icon::after{width:1.6px;height:11px}
.faq__item.is-open .faq__icon{transform:rotate(90deg);border-color:rgba(46,211,183,.5);background:rgba(46,211,183,.12)}
.faq__item.is-open .faq__icon::before,
.faq__item.is-open .faq__icon::after{background:var(--primary)}
.faq__item.is-open .faq__icon::after{opacity:0}
.faq__a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq__a p{
  padding:0 44px 20px 4px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-2);
}

/* ============ CTA + 表单 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-top:1px solid var(--line);
  background:var(--bg-1);
}
.cta-band__bg{
  position:absolute;
  inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;
  background-position:center;
  opacity:.22;
}
.cta-band__veil{
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(10,14,18,.95) 0%,rgba(10,14,18,.82) 52%,rgba(16,23,30,.94) 100%);
}
.cta-band .container{position:relative;z-index:2;padding-top:76px;padding-bottom:76px}
.cta-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,460px);
  gap:48px;
  align-items:center;
}
.cta-grid h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;letter-spacing:-.02em}
.cta-grid .cta-desc{margin-top:14px;color:var(--ink-2);font-size:15.5px;max-width:520px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.form-card{
  background:rgba(22,32,42,.92);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 24px;
  box-shadow:var(--shadow-hover);
}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card .form-sub{font-size:13.5px;color:var(--ink-2);margin-bottom:18px}
.field{margin-bottom:14px}
.field label{
  display:block;
  font-size:13.5px;
  color:var(--ink-2);
  margin-bottom:7px;
}
.field input,
.field textarea{
  width:100%;
  background:#0E151B;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px 14px;
  font-size:15px;
  color:var(--ink);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,
.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,211,183,.2);
}
.form-card .btn{width:100%;margin-top:6px}
.form-tip{
  margin-top:12px;
  font-size:13px;
  color:var(--ink-3);
}
.form-tip.is-ok{color:var(--ok)}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-0);
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:32px;
  padding-bottom:44px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14.5px;
  color:var(--ink-2);
  max-width:320px;
}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{
  font-size:14.5px;
  color:var(--ink-2);
  transition:color .2s var(--ease),transform .2s var(--ease);
  display:inline-block;
}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14px;
  color:var(--ink-2);
}
.footer-contact svg{
  width:20px;height:20px;
  margin-top:4px;
  color:var(--primary);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  font-size:13px;
  color:var(--ink-3);
}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;
  right:22px;
  bottom:26px;
  width:46px;height:46px;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(22,32,42,.9);
  backdrop-filter:blur(8px);
  color:var(--ink-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),color .2s var(--ease),border-color .2s var(--ease),visibility .25s;
  z-index:70;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--primary);border-color:rgba(46,211,183,.5)}
.to-top svg{width:20px;height:20px}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .ops-layout{grid-template-columns:200px minmax(0,1fr);gap:26px}
  .srv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:68px 0}
  .nav__links{
    position:fixed;
    left:0;right:0;
    top:74px;bottom:0;
    margin:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:28px 24px 120px;
    background:rgba(10,14,18,.985);
    border-top:1px solid var(--line);
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
    overflow-y:auto;
  }
  body.nav-open .nav__links{opacity:1;visibility:visible;transform:none}
  .nav__links a{font-size:19px;padding:14px 16px;border-radius:var(--radius-sm)}
  .nav-toggle{display:inline-flex}
  .nav__actions .btn--ghost{display:none}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:minmax(0,1fr);gap:28px}
  .cta-grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
}
@media (max-width:900px){
  .ops-layout{grid-template-columns:minmax(0,1fr);gap:26px}
  .ops-index{
    position:static;
    padding:16px 14px;
  }
  .ops-index h3{
    padding:0 0 10px;
    margin-bottom:10px;
  }
  .ops-index ul{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding-bottom:4px;
    scrollbar-width:none;
  }
  .ops-index ul::-webkit-scrollbar{display:none}
  .ops-index li + li{margin-top:0}
  .ops-index a{
    white-space:nowrap;
    border-left:0;
    border:1px solid var(--line);
    padding:7px 14px;
    border-radius:var(--pill);
    font-size:13.5px;
  }
  .ops-index a:hover{transform:none}
  .ops-index a.is-current{
    border-color:rgba(46,211,183,.55);
    background:rgba(46,211,183,.12);
  }
  .ops-index__note{margin-top:14px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:52px 0}
  .section--tight{padding:44px 0}
  .page-hero{min-height:260px}
  .page-hero .container{padding-top:78px;padding-bottom:32px}
  .page-hero__lead{font-size:15px}
  .srv-grid{grid-template-columns:minmax(0,1fr);gap:18px}
  .flow{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:1fr;gap:18px;padding:20px 18px}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:34px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq__q{font-size:15.5px}
  .faq__a p{padding-right:8px}
  .form-card{padding:22px 18px}
  .to-top{right:16px;bottom:18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    transition-property:opacity,color,background-color,border-color !important;
    transition-duration:.2s !important;
  }
  .srv-card:hover,
  .flow__item:hover{transform:none}
  .srv-card:hover .srv-card__media img{transform:none}
}