/* roulang page: index */
:root{
  --bg-deep:#05080F;
  --bg-layer:#0A1120;
  --glass:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);
  --brand:#2F6BFF;
  --brand-deep:#1B49C4;
  --accent:#16E3B6;
  --signal:#FF6A3D;
  --ink:#E9F0FF;
  --ink-2:#A9B8D6;
  --ink-3:#6B7C9C;
  --radius:18px;
  --radius-lg:24px;
  --radius-img:16px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --shadow-hover:0 30px 72px rgba(0,0,0,.55);
  --inner:inset 0 1px 0 rgba(255,255,255,.12);
  --ease:cubic-bezier(.2,.7,.2,1);
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--ink);
  font-family:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,107,255,.35)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:104px 0;position:relative}
.section--tight{padding:72px 0}
.divider{height:1px;background:var(--line);border:0;margin:0}
.eyebrow{
  font-size:13px;letter-spacing:.16em;color:var(--accent);
  text-transform:uppercase;font-weight:600;margin-bottom:14px;
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:52px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:800}
.section-head .head-note{color:var(--ink-3);font-size:14px;max-width:420px;line-height:1.75}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2);
  border-bottom:1px solid var(--line-strong);padding-bottom:3px;white-space:nowrap;
}
.text-link::after{content:"→";transition:transform .22s var(--ease)}
.text-link:hover{color:var(--brand);border-color:var(--brand)}
.text-link:hover::after{transform:translateX(4px)}

/* ===== Header / Nav ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  transition:background .28s var(--ease),backdrop-filter .28s var(--ease),border-color .28s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.78);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom-color:var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  height:76px;
}
.brand{
  display:inline-flex;align-items:center;gap:12px;font-weight:800;
  font-size:17px;letter-spacing:.02em;white-space:nowrap;
}
.brand-dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 12px rgba(22,227,182,.7);flex:none;
}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.14em;line-height:1.4}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{
  position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--brand);
  transform:translateX(-50%);transition:width .24s var(--ease);border-radius:2px;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:70%}
.nav-links a.is-active{color:var(--ink)}
.nav-links a.is-active::after{width:100%}
.nav-links a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;width:6px;height:6px;border-radius:50%;
  background:var(--accent);transform:translateY(-50%);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--ink);padding:9px 18px;border:1px solid var(--line-strong);border-radius:999px;
  transition:border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
}
.nav-cta:hover{border-color:var(--brand);background:rgba(47,107,255,.12);transform:translateY(-1px)}
.nav-cta::after{content:"›";font-size:16px;color:var(--brand)}
.nav-toggle{
  display:none;background:none;border:0;cursor:pointer;padding:8px;width:44px;height:44px;position:relative;
}
.nav-toggle span{
  display:block;width:22px;height:1.5px;background:var(--ink);margin:5px auto;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  cursor:pointer;border:1px solid transparent;text-align:center;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#2F6BFF,#1B49C4);color:#fff;
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 32px rgba(47,107,255,.34);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 14px 44px rgba(47,107,255,.46);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(47,107,255,.5),0 6px 18px rgba(47,107,255,.3)}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:var(--ink);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:var(--line-strong);transform:translateY(-2px)}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:center;
  padding:150px 0 96px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.55;
}
.hero-mask{
  position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(900px 520px at 78% 18%,rgba(47,107,255,.32),transparent 66%),
    radial-gradient(620px 380px at 12% 78%,rgba(22,227,182,.14),transparent 70%),
    linear-gradient(180deg,rgba(5,8,15,.72) 0%,rgba(5,8,15,.82) 52%,var(--bg-deep) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2);
  border:1px solid var(--line);background:var(--glass);border-radius:999px;
  padding:7px 16px;margin-bottom:26px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block}
.hero h1{
  font-size:clamp(34px,5vw,60px);font-weight:800;line-height:1.18;
  max-width:16em;letter-spacing:.01em;
}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{
  margin-top:24px;font-size:clamp(16px,1.6vw,19px);color:var(--ink-2);
  max-width:34em;line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:38px}
.metrics{
  display:flex;align-items:stretch;gap:0;margin-top:64px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:28px;
}
.metric{
  padding:0 34px;border-left:1px solid var(--line);
}
.metric:first-child{border-left:0;padding-left:0}
.metric strong{
  display:block;font-family:var(--mono);font-size:clamp(26px,3vw,36px);
  font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-.01em;
}
.metric span{display:block;font-size:13px;color:var(--ink-3);margin-top:8px}

/* ===== Section nav (anchor bar) ===== */
.anchor-bar{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:rgba(10,17,32,.55);position:sticky;top:76px;z-index:60;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.anchor-bar ul{display:flex;gap:36px;overflow-x:auto;scrollbar-width:none}
.anchor-bar ul::-webkit-scrollbar{display:none}
.anchor-bar a{
  display:block;padding:18px 0;font-size:14px;color:var(--ink-3);white-space:nowrap;
  border-bottom:2px solid transparent;transition:color .22s var(--ease),border-color .22s var(--ease);
}
.anchor-bar a:hover{color:var(--ink);border-bottom-color:var(--brand)}

/* ===== Features (numbered vertical list) ===== */
.feature-list{border-top:1px solid var(--line)}
.feature-row{
  display:grid;grid-template-columns:120px minmax(0,1fr) minmax(0,1.35fr);
  gap:36px;align-items:start;padding:34px 0;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.feature-row:hover{background:rgba(255,255,255,.022)}
.feature-num{
  font-family:var(--mono);font-size:34px;font-weight:700;color:rgba(255,255,255,.16);
  line-height:1;letter-spacing:-.02em;
}
.feature-row:hover .feature-num{color:var(--brand)}
.feature-row h3{font-size:21px;font-weight:700}
.feature-row h3 small{display:block;font-size:13px;font-weight:500;color:var(--accent);letter-spacing:.1em;margin-top:8px}
.feature-row p{color:var(--ink-2);font-size:15.5px;line-height:1.85}
.feature-row p + p{margin-top:10px}

/* ===== Demo ===== */
.demo-grid{display:grid;grid-template-columns:58% 42%;gap:0;align-items:stretch}
.device{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  min-height:380px;
}
.device img{width:100%;height:100%;object-fit:cover;opacity:.9}
.device::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(140deg,rgba(47,107,255,.22),transparent 45%,rgba(5,8,15,.6));
  pointer-events:none;
}
.device-glare{
  position:absolute;top:0;left:0;right:0;height:1px;background:rgba(255,255,255,.35);z-index:2;
}
.device-caption{
  position:absolute;left:26px;bottom:24px;z-index:3;font-size:13.5px;color:var(--ink-2);
  background:rgba(5,8,15,.6);border:1px solid var(--line);border-radius:999px;padding:8px 16px;
}
.demo-panel{padding-left:52px}
.tabs{display:flex;gap:28px;border-bottom:1px solid var(--line);margin-bottom:26px;flex-wrap:wrap}
.tab{
  position:relative;padding:0 0 14px;font-size:15px;color:var(--ink-3);font-weight:600;
  background:none;border:0;cursor:pointer;transition:color .22s var(--ease);
}
.tab:hover{color:var(--ink-2)}
.tab.is-active{color:var(--ink)}
.tab.is-active::before{
  content:"";position:absolute;left:-14px;top:7px;width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.tab.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand);border-radius:2px;
}
.tab-pane{display:none}
.tab-pane.is-active{display:block;animation:fadeUp .32s var(--ease) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.pane-title{font-size:19px;font-weight:700;margin-bottom:16px}
.pane-list li{
  display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);
  color:var(--ink-2);font-size:15px;line-height:1.8;
}
.pane-list li::before{
  content:"";flex:none;width:5px;height:5px;border-radius:50%;background:var(--accent);margin-top:12px;
}
.pane-list li:last-child{border-bottom:0}

/* ===== Proof ===== */
.data-strip{
  display:flex;gap:0;overflow-x:auto;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:6px 0;scrollbar-width:thin;
}
.data-cell{
  flex:1 0 auto;min-width:190px;padding:26px 34px;border-left:1px solid var(--line);
}
.data-cell:first-child{border-left:0}
.data-cell strong{
  font-family:var(--mono);font-size:30px;color:var(--accent);display:block;line-height:1.1;
}
.data-cell span{font-size:13px;color:var(--ink-3);display:block;margin-top:8px}
.voice-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:48px}
.voice{
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  box-shadow:var(--shadow),var(--inner);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.voice:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover),var(--inner)}
.voice p{color:var(--ink-2);font-size:15.5px;line-height:1.85}
.voice-who{display:flex;align-items:center;gap:14px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:none;overflow:hidden;border:1px solid var(--line-strong);
}
.avatar img{width:100%;height:100%;object-fit:cover}
.voice-who b{display:block;font-size:14.5px;font-weight:600}
.voice-who em{font-style:normal;font-size:13px;color:var(--ink-3)}

/* ===== Price ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;align-items:center}
.plan{
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;
  box-shadow:var(--shadow),var(--inner);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.plan:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.plan--featured{
  transform:scale(1.06);
  border-color:rgba(47,107,255,.6);
  box-shadow:0 0 0 1px rgba(47,107,255,.35),0 26px 70px rgba(47,107,255,.26),var(--inner);
}
.plan--featured:hover{transform:scale(1.06) translateY(-3px)}
.plan-tag{
  display:inline-block;font-size:12px;letter-spacing:.1em;color:var(--accent);
  border:1px solid rgba(22,227,182,.35);border-radius:999px;padding:4px 12px;margin-bottom:18px;
}
.plan h3{font-size:19px;font-weight:700}
.plan .price{
  font-family:var(--mono);font-size:clamp(30px,3.4vw,42px);color:var(--brand);
  margin:18px 0 6px;line-height:1;letter-spacing:-.02em;
}
.plan .price small{font-size:14px;color:var(--ink-3);font-family:inherit;margin-left:6px;letter-spacing:0}
.plan .price-note{font-size:13px;color:var(--ink-3);margin-bottom:22px}
.plan ul{border-top:1px solid var(--line);padding-top:20px;margin-bottom:26px}
.plan li{
  position:relative;padding:9px 0 9px 22px;font-size:14.5px;color:var(--ink-2);
}
.plan li::before{
  content:"";position:absolute;left:0;top:17px;width:9px;height:1.5px;background:var(--brand);border-radius:2px;
}
.plan li::after{
  content:"";position:absolute;left:0;top:12.5px;width:1.5px;height:10px;background:var(--brand);border-radius:2px;
}

/* ===== News / CMS list ===== */
.post-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.post-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow),var(--inner);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.post-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover),var(--inner)}
.post-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-layer)}
.post-cover img{
  width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease);opacity:.92;
}
.post-card:hover .post-cover img{transform:scale(1.03)}
.pill{
  display:inline-block;font-size:12px;padding:4px 12px;border-radius:999px;
  background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.35);color:#BBD0FF;
}
.post-cover .pill{position:absolute;left:14px;top:14px;backdrop-filter:blur(8px)}
.post-body{padding:22px;display:flex;flex-direction:column;flex:1}
.post-time{font-size:13px;color:var(--ink-3);margin-bottom:10px}
.post-card h3{font-size:17px;line-height:1.5;font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card .excerpt{
  margin-top:12px;font-size:14px;color:var(--ink-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--ink-3);
}
.post-foot .read{color:var(--brand)}
.post-card:hover .post-foot .read{color:var(--accent)}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:56px 24px;text-align:center;color:var(--ink-3);font-size:15px;
  background:rgba(255,255,255,.02);
}
.empty-state a{color:var(--brand);margin-left:10px;border-bottom:1px solid rgba(47,107,255,.5)}

/* ===== FAQ ===== */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:24px 48px 24px 22px;font-size:17px;font-weight:600;
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:26px;width:2px;height:18px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .22s var(--ease);
}
.faq-item summary::after{
  content:"+";position:absolute;right:12px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--ink-3);transition:transform .26s var(--ease),color .22s var(--ease);
}
.faq-item[open] summary::before{opacity:1}
.faq-item[open] summary::after{content:"×";transform:translateY(-50%) rotate(180deg);color:var(--brand)}
.faq-item summary:hover{color:#fff}
.faq-answer{padding:0 22px 26px 22px;color:var(--ink-2);font-size:15.5px;line-height:1.8;max-width:720px}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  box-shadow:var(--shadow),var(--inner);
  padding:64px 56px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;top:-140px;right:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,61,.22),transparent 65%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(23px,2.8vw,32px);max-width:22em;position:relative}
.cta-band p{color:var(--ink-2);margin-top:14px;font-size:15.5px;max-width:40em;position:relative}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;position:relative}
.btn-signal{
  background:linear-gradient(135deg,#FF8A5C,#FF6A3D);color:#20100A;
  box-shadow:0 0 0 1px rgba(255,106,61,.6),0 12px 40px rgba(255,106,61,.34);
  font-weight:700;
}
.btn-signal:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,106,61,.75),0 16px 48px rgba(255,106,61,.46);filter:brightness(1.05)}
.btn-signal:active{transform:translateY(0)}

/* ===== Floating CTA ===== */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:999px;font-size:14.5px;font-weight:600;
  background:linear-gradient(135deg,#FF8A5C,#FF6A3D);color:#20100A;
  box-shadow:0 0 0 1px rgba(255,106,61,.5),0 12px 36px rgba(255,106,61,.4);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease),box-shadow .28s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none;}
.float-cta:hover{transform:translateY(-3px);box-shadow:0 0 0 1px rgba(255,106,61,.7),0 16px 48px rgba(255,106,61,.5)}
.float-cta i{width:7px;height:7px;border-radius:50%;background:#20100A;display:block;animation:pulse 2.2s infinite var(--ease)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ===== Footer ===== */
.site-footer{border-top:1px solid var(--line);background:var(--bg-layer);margin-top:40px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:0;
}
.footer-col{padding:56px 32px;border-left:1px solid var(--line)}
.footer-col:first-child{border-left:0;padding-left:0}
.footer-col:last-child{padding-right:0}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.06em;margin-bottom:20px}
.footer-col p{font-size:14px;color:var(--ink-3);line-height:1.85;max-width:26em}
.footer-col li{margin-bottom:12px}
.footer-col li a{font-size:14px;color:var(--ink-2);display:inline-block;transition:color .22s var(--ease),transform .22s var(--ease)}
.footer-col li a:hover{color:var(--brand);transform:translateX(4px)}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;margin-bottom:18px}
.footer-bottom{
  border-top:1px solid var(--line);padding:24px 0;display:flex;align-items:center;
  justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:13px;color:var(--ink-3);
}

/* ===== Skeleton ===== */
.skeleton{
  position:relative;overflow:hidden;background:rgba(255,255,255,.05);border-radius:var(--radius);
}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent);
  animation:shine 1.6s infinite linear;
}
@keyframes shine{from{transform:translateX(-100%)}to{transform:translateX(100%)}}

/* ===== Responsive ===== */
@media (min-width:1280px){
  .container{max-width:1280px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .demo-grid{grid-template-columns:1fr;gap:36px}
  .demo-panel{padding-left:0}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;gap:22px}
  .plan--featured{transform:none}
  .plan--featured:hover{transform:translateY(-3px)}
  .feature-row{grid-template-columns:80px 1fr;gap:24px}
  .feature-row p{grid-column:2}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col:nth-child(3){border-left:0}
  .footer-col{padding:44px 24px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .container{padding:0 20px}
  .nav-links{
    position:fixed;inset:0;z-index:95;
    flex-direction:column;justify-content:center;gap:0;
    background:rgba(5,8,15,.96);
    -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform .3s var(--ease),opacity .3s var(--ease);
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav-links a{font-size:20px;line-height:56px;color:var(--ink);width:100%;text-align:center}
  .nav-links a::after{display:none}
  .nav-links a.is-active::before{position:static;display:inline-block;margin-right:10px;transform:none;vertical-align:middle}
  .nav-toggle{display:block;position:relative;z-index:99}
  .nav-cta{display:none}
  .hero{padding:120px 0 72px;min-height:auto}
  .hero-actions .btn{width:100%}
  .metrics{margin-top:44px;gap:20px 0}
  .metric{padding:0 22px}
  .metric:first-child{padding-left:0}
  .anchor-bar{top:68px}
  .anchor-bar ul{gap:24px}
  .voice-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr;gap:12px;padding:26px 0}
  .feature-num{font-size:26px}
  .feature-row p{grid-column:auto}
  .cta-band{padding:40px 26px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-col{border-left:0;padding:32px 0}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    font-size:15px;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:none}
  .float-cta:hover{transform:none}
  .site-footer{padding-bottom:56px}
}
@media (max-width:520px){
  .hero h1{font-size:clamp(28px,8vw,38px)}
  .metrics{flex-direction:row;flex-wrap:wrap}
  .metric{flex:1 1 46%;border-left:0;padding:0;margin-bottom:22px}
  .metric:nth-child(2){padding-left:20px;border-left:1px solid var(--line)}
  .data-cell{min-width:160px;padding:20px 22px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px}
  .plan{padding:26px 20px}
  .post-body{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --bg-deep:#05080F;
  --bg-layer:#0A1120;
  --glass:rgba(255,255,255,.055);
  --glass-strong:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);
  --brand:#2F6BFF;
  --brand-deep:#1B49C4;
  --accent:#16E3B6;
  --signal:#FF6A3D;
  --ink:#E9F0FF;
  --ink-2:#A9B8D6;
  --ink-3:#6B7C9C;
  --radius-s:12px;
  --radius:18px;
  --radius-l:24px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --shadow-hover:0 24px 72px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.2,1);
  --container:1200px;
  --font-sans:"HarmonyOS Sans","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.8;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(720px 420px at 82% -6%,rgba(47,107,255,.18),transparent 62%),
    radial-gradient(620px 380px at 6% 12%,rgba(22,227,182,.08),transparent 60%);
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em;line-height:1.28}
h1{font-size:clamp(34px,5vw,60px)}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:20px;line-height:1.45}
p{margin:0}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--brand)}
img{max-width:100%;display:block;border-radius:16px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.wide{max-width:1280px}
.section{padding:104px 0;position:relative;z-index:1}
.section-tight{padding:72px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--accent);text-transform:uppercase;
  font-weight:600;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);display:block}
.lead{color:var(--ink-2);font-size:17px;max-width:640px}
.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  transition:background .26s var(--ease),backdrop-filter .26s var(--ease),border-color .26s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:78px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:17px;letter-spacing:.01em;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-dot{
  width:10px;height:10px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  box-shadow:0 0 0 4px rgba(47,107,255,.14);
}
.brand-sub{display:block;font-size:11.5px;font-weight:500;color:var(--ink-3);letter-spacing:.16em;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{
  position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--ink);
  border-bottom:1px solid var(--line-strong);padding-bottom:3px;transition:all .22s var(--ease);
}
.nav-cta::after{content:"→";font-size:13px;color:var(--brand);transition:transform .22s var(--ease)}
.nav-cta:hover{border-bottom-color:var(--brand);color:var(--brand)}
.nav-cta:hover::after{transform:translateX(3px)}
.nav-toggle{
  display:none;width:42px;height:42px;border:0;background:transparent;
  flex-direction:column;justify-content:center;gap:5px;align-items:center;position:relative;z-index:60;
}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .24s var(--ease),opacity .２s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;padding:172px 0 84px;overflow:hidden;border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center 30%;
  opacity:.26;filter:saturate(.9);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(620px 340px at 78% 10%,rgba(47,107,255,.22),transparent 66%),
    linear-gradient(180deg,rgba(5,8,15,.72) 0%,rgba(5,8,15,.86) 55%,var(--bg-deep) 100%);
}
.page-hero .container{max-width:1100px}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-3);margin-bottom:26px;flex-wrap:wrap}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:rgba(255,255,255,.22)}
.crumbs .current{color:var(--ink-2)}
.page-hero h1{max-width:16em}
.hero-sub{margin-top:20px;color:var(--ink-2);font-size:17.5px;max-width:620px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;font-size:13px;
  border:1px solid var(--line);background:var(--glass);color:var(--ink-2);
}
.chip.brand{color:var(--accent);border-color:rgba(22,227,182,.28);background:rgba(22,227,182,.06)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:999px;font-size:15.5px;font-weight:600;
  border:1px solid transparent;transition:all .22s var(--ease);white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#fff;
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 32px rgba(47,107,255,.34);
}
.btn-primary:hover{
  transform:translateY(-2px);color:#fff;filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(47,107,255,.7),0 14px 44px rgba(47,107,255,.46);
}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;color:var(--ink);border:1px solid var(--line-strong);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);color:var(--ink);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-signal{
  background:linear-gradient(135deg,#FF6A3D,#E04B22);color:#fff;
  box-shadow:0 0 0 1px rgba(255,106,61,.5),0 10px 34px rgba(255,106,61,.3);
}
.btn-signal:hover{transform:translateY(-2px);color:#fff;filter:brightness(1.05);box-shadow:0 0 0 1px rgba(255,106,61,.66),0 14px 44px rgba(255,106,61,.42)}
.btn-signal:active{transform:translateY(0)}
.btn-block{width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none!important}

/* ---------- split media ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
}
.split + .split{margin-top:88px}
.split.flip .split-media{order:2}
.split-media{
  position:relative;border-radius:var(--radius-l);overflow:hidden;
  border:1px solid var(--line);background:var(--glass-strong);box-shadow:var(--shadow);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.split-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(160deg,rgba(255,255,255,.14),transparent 42%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:0;transition:transform .5s var(--ease)}
.split-media:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.split-media:hover img{transform:scale(1.03)}
.split-body h2{margin-bottom:18px}
.split-body p{color:var(--ink-2);margin-bottom:16px}
.split-body p:last-of-type{margin-bottom:0}
.mini-points{margin-top:22px;display:grid;gap:12px}
.mini-points li{
  display:grid;grid-template-columns:18px 1fr;gap:12px;
  font-size:15.5px;color:var(--ink-2);line-height:1.7;
}
.mini-points li::before{
  content:"";width:14px;height:1.5px;background:var(--accent);margin-top:14px;border-radius:2px;
}

/* ---------- numbered list ---------- */
.numbered{
  border-top:1px solid var(--line);
}
.numbered li{
  display:grid;grid-template-columns:96px 1fr;gap:32px;
  padding:30px 0;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),padding .24s var(--ease);
}
.numbered li:hover{background:rgba(255,255,255,.02);}
.numbered .num{
  font-family:var(--font-num);font-size:15px;font-weight:700;color:var(--brand);
  letter-spacing:.06em;padding-top:4px;
}
.numbered h3{margin-bottom:8px}
.numbered p{color:var(--ink-2);font-size:15.5px;max-width:70ch}

/* ---------- stat band ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat-band .stat{
  padding:30px 26px;position:relative;
}
.stat-band .stat + .stat::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:1px;background:var(--line);
}
.stat .value{
  font-family:var(--font-num);font-size:2.05rem;font-weight:700;color:var(--brand);
  line-height:1.1;letter-spacing:-.01em;
}
.stat .value.accent{color:var(--accent)}
.stat .label{display:block;margin-top:10px;font-size:13.5px;color:var(--ink-3);line-height:1.6}

/* ---------- info strip ---------- */
.scene-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.scene{
  padding:34px 30px;position:relative;
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  transition:background .24s var(--ease);
}
.scene + .scene{border-left:1px solid var(--line)}
.scene:hover{background:rgba(255,255,255,.06)}
.scene .tag{
  display:inline-block;font-size:12.5px;letter-spacing:.1em;color:var(--accent);
  margin-bottom:14px;font-weight:600;
}
.scene h3{font-size:19px;margin-bottom:10px}
.scene p{color:var(--ink-2);font-size:15px;line-height:1.75}

/* ---------- faq ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;background:transparent;border:0;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px 24px 0;font-size:17px;font-weight:600;text-align:left;
  transition:color .22s var(--ease);
}
.faq-q:hover{color:var(--brand)}
.faq-q .sign{
  flex:0 0 auto;width:22px;height:22px;position:relative;
}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--ink-2);border-radius:2px;
  transition:transform .26s var(--ease),background .26s var(--ease);
}
.faq-q .sign::before{left:0;top:10px;width:22px;height:1.5px}
.faq-q .sign::after{left:10px;top:0;width:1.5px;height:22px}
.faq-item.is-open .faq-q{color:var(--ink)}
.faq-item.is-open .sign::before{background:var(--brand)}
.faq-item.is-open .sign::after{transform:rotate(90deg);opacity:0}
.faq-item::before{
  content:"";position:absolute;left:-18px;top:22px;bottom:22px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .26s var(--ease);
}
.faq-item.is-open::before{opacity:1}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .32s var(--ease),padding .32s var(--ease);
  padding:0;
}
.faq-item.is-open .faq-a{padding-bottom:24px}
.faq-a p{color:var(--ink-2);font-size:15.5px;line-height:1.8;max-width:720px}

/* ---------- cta band ---------- */
.cta-band{
  border-radius:var(--radius-l);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.02));
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
  padding:54px 48px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,61,.16),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);max-width:22em}
.cta-band p{color:var(--ink-2);margin-top:12px;font-size:15.5px;max-width:44em}
.cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.text-link{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);padding-bottom:3px;
}
.text-link:hover{color:var(--brand);border-bottom-color:var(--brand)}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:45;
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 22px;border-radius:999px;font-size:14.5px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#FF6A3D,#E04B22);
  box-shadow:0 0 0 1px rgba(255,106,61,.5),0 0 26px rgba(255,106,61,.34),0 12px 30px rgba(0,0,0,.42);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .3s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{color:#fff;filter:brightness(1.06);box-shadow:0 0 0 1px rgba(255,106,61,.7),0 0 36px rgba(255,106,61,.46),0 14px 34px rgba(0,0,0,.46)}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);margin-top:0;padding-top:72px;
  background:linear-gradient(180deg,rgba(10,17,32,.6),rgba(5,8,15,1));
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:0}
.footer-col{padding:0 30px;position:relative}
.footer-col:first-child{padding-left:0}
.footer-col:last-child{padding-right:0}
.footer-col + .footer-col::before{
  content:"";position:absolute;left:0;top:4px;bottom:6px;width:1px;background:var(--line);
}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16.5px;margin-bottom:16px}
.footer-col p{color:var(--ink-3);font-size:14px;line-height:1.8;max-width:34ch}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:18px;color:var(--ink)}
.footer-col ul{display:grid;gap:11px}
.footer-col li{font-size:14px;color:var(--ink-3)}
.footer-col a{font-size:14px;color:var(--ink-3);display:inline-block;transition:all .2s var(--ease)}
.footer-col a:hover{color:var(--brand);transform:translateX(4px)}
.footer-bottom{
  margin-top:60px;border-top:1px solid var(--line);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{max-width:1120px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
  .split{grid-template-columns:1fr;gap:34px}
  .split.flip .split-media{order:0}
  .split + .split{margin-top:64px}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat-band .stat:nth-child(3)::before{display:none}
  .stat-band .stat:nth-child(3),.stat-band .stat:nth-child(4){border-top:1px solid var(--line)}
  .stat-band .stat:nth-child(3){}
  .scene-strip{grid-template-columns:1fr}
  .scene + .scene{border-left:0;border-top:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 0}
  .footer-col{padding:0 24px}
  .footer-col:nth-child(3){padding-left:0}
  .footer-col:nth-child(3)::before{display:none}
}
@media (max-width:768px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-links{
    position:fixed;inset:0;z-index:55;
    flex-direction:column;justify-content:center;align-items:flex-start;
    gap:0;padding:96px 34px 40px;
    background:rgba(5,8,15,.94);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s;
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-links a{
    font-size:20px;color:var(--ink);width:100%;padding:0;line-height:56px;
    border-bottom:1px solid var(--line);
  }
  .nav-links a::after{display:none}
  .nav-links a.is-active::before{left:-16px}
  .page-hero{padding:132px 0 60px}
  .hero-sub{font-size:16px}
  .numbered li{grid-template-columns:1fr;gap:10px;padding:24px 0}
  .numbered .num{padding-top:0}
  .stat-band{grid-template-columns:1fr 1fr}
  .stat-band .stat{padding:24px 18px}
  .cta-band{padding:36px 24px;border-radius:var(--radius)}
  .footer-grid{grid-template-columns:1fr;gap:0}
  .footer-col{padding:24px 0;border-bottom:1px solid var(--line)}
  .footer-col::before{display:none!important}
  .footer-col:first-child{padding-top:0}
  .footer-col p{max-width:none}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;
    justify-content:center;padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
}
@media (max-width:520px){
  h1{font-size:clamp(30px,8vw,40px)}
  .btn{width:100%;padding:14px 20px}
  .cta-actions{width:100%;flex-direction:column;align-items:stretch}
  .hero-meta{gap:8px}
  .chip{font-size:12.5px;padding:5px 12px}
  .btn-ghost{width:100%}
  .stat-band{grid-template-columns:1fr}
  .stat-band .stat + .stat::before{display:none}
  .stat-band .stat + .stat{border-top:1px solid var(--line)}
  .faq-item::before{left:-12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg-deep:#05080F;
  --bg-layer:#0A1120;
  --bg-layer-2:#0D1730;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.085);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);
  --brand:#2F6BFF;
  --brand-dark:#1B49C4;
  --accent:#16E3B6;
  --signal:#FF6A3D;
  --ink:#E9F0FF;
  --ink-2:#A9B8D6;
  --ink-3:#6B7C9C;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:24px;
  --radius-pill:999px;
  --shadow-card:0 24px 60px rgba(0,0,0,.45);
  --shadow-card-hover:0 30px 72px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 78% -8%, rgba(47,107,255,.20), transparent 62%),
    radial-gradient(700px 420px at 8% 12%, rgba(22,227,182,.10), transparent 60%),
    var(--bg-deep);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:16px}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
a:hover{color:var(--brand)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:.01em;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(47,107,255,.35);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{max-width:1280px}}
.section{padding:104px 0}
.section-tight{padding:72px 0}
@media (max-width:1024px){.section{padding:72px 0}.section-tight{padding:56px 0}}
@media (max-width:768px){.section{padding:56px 0}.section-tight{padding:48px 0}}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .3s var(--ease),backdrop-filter .3s var(--ease),border-color .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(8,12,22,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:32px;min-height:76px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.01em;white-space:nowrap}
.brand-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px rgba(22,227,182,.9);flex:0 0 auto}
.brand-sub{display:block;font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.16em;line-height:1.4}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto}
.nav-links a{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--brand);
  transform:translateX(-50%);transition:width .24s var(--ease);border-radius:2px;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:100%}
.nav-links a.is-active{color:var(--ink);font-weight:600}
.nav-links a.is-active::after{width:100%}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  padding:10px 18px;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);color:var(--ink);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-cta::after{content:"→";font-size:13px;color:var(--brand);transition:transform .22s var(--ease)}
.nav-cta:hover{background:rgba(255,255,255,.06);border-color:rgba(47,107,255,.6);transform:translateY(-1px)}
.nav-cta:hover::after{transform:translateX(3px)}
.nav-toggle{display:none;width:42px;height:42px;flex-direction:column;justify-content:center;align-items:center;gap:5px;margin-left:auto}
.nav-toggle span{display:block;width:20px;height:1.6px;background:var(--ink);border-radius:2px;transition:transform .24s var(--ease),opacity .24s var(--ease)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6.6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6.6px) rotate(-45deg)}
@media (max-width:1024px){
  .nav-links{gap:22px}
  .nav-links a{font-size:14px}
}
@media (max-width:768px){
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .nav-links{
    position:fixed;inset:0;margin:0;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;
    gap:0;padding:0 32px;background:rgba(6,10,18,.94);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    transform:translateX(100%);opacity:0;pointer-events:none;
    transition:transform .32s var(--ease),opacity .32s var(--ease);
    z-index:90;
  }
  .nav-links.is-open{transform:translateX(0);opacity:1;pointer-events:auto}
  .nav-links a{font-size:20px;line-height:56px;width:100%;border-bottom:1px solid var(--line)}
  .nav-links a::after{display:none}
  .nav-links a.is-active{color:var(--brand)}
}

/* ---------- article head ---------- */
.article-head{padding:150px 0 8px;position:relative}
.article-head::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(720px 340px at 20% 0%, rgba(47,107,255,.16), transparent 66%);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3);margin-bottom:34px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .current{color:var(--ink-2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cat-chip{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.08em;
  color:var(--accent);text-transform:none;margin-bottom:18px;
}
.cat-chip::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px rgba(22,227,182,.8)}
.article-title{
  font-size:clamp(26px,4vw,40px);line-height:1.35;font-weight:800;letter-spacing:.01em;
  max-width:900px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13.5px;color:var(--ink-3);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin-top:28px;padding:16px 0;
}
.meta-bar i{font-style:normal;color:rgba(255,255,255,.22)}
.meta-bar .read{color:var(--ink-2)}
@media (max-width:768px){.article-head{padding:120px 0 4px}}

/* ---------- article layout ---------- */
.article-main{padding:56px 0 96px}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:56px}
@media (min-width:1280px){
  .article-wrap.has-toc{grid-template-columns:minmax(0,820px) 260px;justify-content:center;gap:64px}
}
.article-body{max-width:820px;font-size:17px;line-height:1.8;color:var(--ink-2)}
.article-body p{margin:0 0 1.4em;text-indent:0}
.article-body h2{
  position:relative;font-size:clamp(22px,2.6vw,28px);color:var(--ink);
  margin:2.2em 0 .9em;padding-left:18px;line-height:1.4;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:18px;border-radius:2px;background:var(--brand);box-shadow:0 0 12px rgba(47,107,255,.8)}
.article-body h3{font-size:20px;color:var(--ink);margin:1.8em 0 .7em;font-weight:700}
.article-body h4{font-size:17px;color:var(--ink);margin:1.4em 0 .6em;font-weight:600}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(47,107,255,.36)}
.article-body a:hover{color:var(--accent);border-color:rgba(22,227,182,.5)}
.article-body strong{color:var(--ink);font-weight:700}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.25em}
.article-body ul li,.article-body ol li{margin:.5em 0;line-height:1.8;position:relative}
.article-body ul li::marker{color:var(--brand)}
.article-body ol li::marker{color:var(--brand);font-weight:700}
.article-body blockquote{
  margin:1.6em 0;padding:20px 24px;border-left:3px solid var(--brand);
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border-radius:0 var(--radius-m) var(--radius-m) 0;color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:16px;margin:1.6em auto}
.article-body figure{margin:1.8em 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px;line-height:1.6}
.article-body table{width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.article-body th{background:var(--glass-strong);color:var(--ink);font-weight:600}
.article-body tr:hover td{background:rgba(255,255,255,.03)}
.article-body code{
  font-family:var(--font-mono);font-size:.9em;background:rgba(255,255,255,.07);
  padding:2px 6px;border-radius:6px;color:var(--accent);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* ---------- toc ---------- */
.toc{
  align-self:start;position:sticky;top:104px;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-m);
  padding:22px 22px 18px;box-shadow:var(--shadow-card);
}
.toc h4{font-size:13px;letter-spacing:.14em;color:var(--ink-3);font-weight:600;margin-bottom:14px}
.toc ol{display:flex;flex-direction:column;gap:2px}
.toc a{
  position:relative;display:block;font-size:13.5px;line-height:1.6;color:var(--ink-3);
  padding:7px 0 7px 14px;border-left:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.toc a::before{
  content:"";position:absolute;left:-3.5px;top:16px;width:6px;height:6px;border-radius:50%;
  background:transparent;transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.toc a:hover{color:var(--ink-2)}
.toc a.is-active{color:var(--ink);border-color:var(--brand)}
.toc a.is-active::before{background:var(--brand);box-shadow:0 0 10px rgba(47,107,255,.9)}
.toc-empty-note{font-size:13px;color:var(--ink-3);line-height:1.7}
@media (max-width:1279px){.toc{display:none}}

/* ---------- tags / post nav ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:48px 0 0;padding-top:28px;border-top:1px solid var(--line)}
.tag{
  display:inline-flex;align-items:center;font-size:13px;color:var(--ink-2);
  padding:6px 14px;border:1px solid var(--line);border-radius:var(--radius-pill);
  background:rgba(255,255,255,.03);
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{color:var(--ink);border-color:rgba(47,107,255,.55);background:rgba(47,107,255,.12)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:36px}
.post-nav-item{
  display:block;padding:22px 24px;border-top:1px solid var(--line);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.post-nav-item:hover{border-color:var(--brand);transform:translateY(-2px)}
.post-nav-item .pn-label{display:block;font-size:12.5px;letter-spacing:.1em;color:var(--ink-3);margin-bottom:8px}
.post-nav-item strong{font-size:16px;font-weight:600;color:var(--ink);display:block;line-height:1.6}
.post-nav-item.is-next{text-align:right}
@media (max-width:768px){.post-nav{grid-template-columns:1fr;gap:8px}.post-nav-item.is-next{text-align:left}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 30px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease);
}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 32px rgba(47,107,255,.34);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 14px 44px rgba(47,107,255,.46);filter:brightness(1.06);color:#fff}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  color:var(--ink);border:1px solid var(--line-strong);background:rgba(255,255,255,.02);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.28);transform:translateY(-2px);color:var(--ink)}
.btn-signal{
  color:#fff;background:linear-gradient(135deg,var(--signal),#D8501F);
  box-shadow:0 0 0 1px rgba(255,106,61,.5),0 10px 34px rgba(255,106,61,.34);
}
.btn-signal:hover{transform:translateY(-2px);filter:brightness(1.06);color:#fff;box-shadow:0 0 0 1px rgba(255,106,61,.7),0 14px 44px rgba(255,106,61,.46)}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;color:var(--ink-2);font-weight:600}
.link-arrow::after{content:"→";color:var(--brand);transition:transform .22s var(--ease)}
.link-arrow:hover{color:var(--ink)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- shared section heading ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:800}
.section-head p{font-size:14.5px;color:var(--ink-3);margin-top:10px;max-width:640px}
@media (max-width:768px){.section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed rgba(255,255,255,.22);border-radius:var(--radius-l);
  padding:56px 28px;text-align:center;background:rgba(255,255,255,.02);
}
.empty-state h3{font-size:20px;margin-bottom:12px}
.empty-state p{color:var(--ink-3);font-size:15px;margin-bottom:20px}

/* ---------- related cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-m);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-card-hover)}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:0}
.card-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .6s var(--ease)}
.card:hover .card-cover img{transform:scale(1.03)}
.card-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,15,0) 40%,rgba(5,8,15,.72))}
.card-body{padding:24px 26px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-3)}
.pill{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:4px 12px;border-radius:var(--radius-pill);
  color:var(--accent);background:rgba(22,227,182,.10);border:1px solid rgba(22,227,182,.24);
}
.card h3{font-size:19px;line-height:1.5;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card p{font-size:14.5px;color:var(--ink-3);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}
@media (max-width:1024px){.card-grid{grid-template-columns:repeat(2,1fr);gap:22px}}
@media (max-width:768px){.card-grid{grid-template-columns:1fr}.card-body{padding:20px}}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-l);
  padding:64px 56px;box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,106,61,.22),transparent 68%);
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);max-width:640px;line-height:1.4;position:relative}
.cta-band p{font-size:14.5px;color:var(--ink-3);margin-top:12px;position:relative}
.cta-actions{display:flex;align-items:center;gap:26px;flex-wrap:wrap;position:relative}
@media (max-width:768px){.cta-band{padding:40px 24px}.cta-actions{width:100%}.cta-actions .btn{width:100%}}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 24px;border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--signal),#D8501F);
  box-shadow:0 0 0 1px rgba(255,106,61,.42),0 10px 34px rgba(255,106,61,.36);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{color:#fff;box-shadow:0 0 0 1px rgba(255,106,61,.7),0 14px 44px rgba(255,106,61,.5)}
@media (max-width:768px){
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
}

/* ---------- footer ---------- */
.site-footer{margin-top:40px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:0;padding:64px 0 48px}
.footer-col{padding:0 32px;border-left:1px solid var(--line)}
.footer-col:first-child{padding-left:0;border-left:0}
.footer-col:last-child{padding-right:0}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;margin-bottom:14px}
.footer-col p{font-size:14px;color:var(--ink-3);line-height:1.8;max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;letter-spacing:.06em;color:var(--ink);margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li{font-size:14px;color:var(--ink-3)}
.footer-col ul a{display:inline-block;font-size:14px;color:var(--ink-3);transition:color .2s var(--ease),transform .2s var(--ease)}
.footer-col ul a:hover{color:var(--brand);transform:translateX(4px)}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px 0}
  .footer-col{padding:0 24px}
  .footer-col:nth-child(3){padding-left:0;border-left:0}
}
@media (max-width:768px){
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 32px}
  .footer-col{padding:0;border-left:0;border-top:1px solid var(--line);padding-top:24px}
  .footer-col:first-child{border-top:0;padding-top:0}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ---------- misc states ---------- */
.skeleton{
  position:relative;overflow:hidden;background:rgba(255,255,255,.05);border-radius:12px;
}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.08),transparent);
  transform:translateX(-100%);animation:shine 1.4s infinite;
}
@keyframes shine{to{transform:translateX(100%)}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --bg-deep:#05080F;
  --bg-layer:#0A1120;
  --glass:rgba(255,255,255,.055);
  --glass-strong:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);
  --brand:#2F6BFF;
  --brand-deep:#1B49C4;
  --accent:#16E3B6;
  --signal:#FF6A3D;
  --ink:#E9F0FF;
  --ink-2:#A9B8D6;
  --ink-3:#6B7C9C;
  --radius-s:12px;
  --radius-m:18px;
  --radius-l:24px;
  --pill:999px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --shadow-hover:0 28px 72px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.2,1);
  --t:220ms;
  --mono:"SFMono-Regular",Menlo,Consolas,"Roboto Mono","Noto Sans Mono",monospace;
  --sans:"HarmonyOS Sans","Source Han Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg-deep);
  background-image:
    radial-gradient(900px 520px at 78% -6%,rgba(47,107,255,.20),transparent 62%),
    radial-gradient(700px 420px at 4% 22%,rgba(22,227,182,.10),transparent 60%),
    linear-gradient(180deg,#05080F 0%,#070C18 40%,#05080F 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:16px}
a{color:inherit;text-decoration:none;transition:color var(--t) var(--ease),opacity var(--t) var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:.01em;line-height:1.28;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section-tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);opacity:.7}
.h2{font-size:clamp(26px,3.2vw,36px);margin-top:14px}
.section-head{max-width:760px;margin-bottom:52px}
.lead{color:var(--ink-2);margin-top:16px;font-size:16.5px}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:90;
  background:transparent;border-bottom:1px solid transparent;
  transition:background var(--t) var(--ease),border-color var(--t) var(--ease),backdrop-filter var(--t) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.72);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:32px;height:76px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.01em;color:var(--ink);white-space:nowrap}
.brand-dot{
  width:9px;height:9px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  box-shadow:0 0 0 4px rgba(47,107,255,.16),0 0 16px rgba(47,107,255,.6);
}
.brand-sub{display:block;font-size:11.5px;font-weight:500;letter-spacing:.18em;color:var(--ink-3);margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:32px;margin-left:auto;font-size:14.5px;color:var(--ink-2)}
.nav-links a{position:relative;padding:6px 0}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  transform:scaleX(0);transform-origin:left;transition:transform var(--t) var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--ink);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 12px rgba(22,227,182,.8);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--ink);
  padding:9px 18px;border:1px solid var(--line);border-radius:var(--pill);
  background:rgba(255,255,255,.03);
  transition:all var(--t) var(--ease);
}
.nav-cta::after{content:"→";font-size:13px;color:var(--accent);transition:transform var(--t) var(--ease)}
.nav-cta:hover{border-color:var(--line-strong);background:rgba(255,255,255,.07);color:#fff}
.nav-cta:hover::after{transform:translateX(3px)}
.nav-toggle{display:none;margin-left:auto;width:40px;height:40px;position:relative}
.nav-toggle span{position:absolute;left:9px;right:9px;height:1.5px;background:var(--ink);border-radius:2px;transition:all var(--t) var(--ease)}
.nav-toggle span:nth-child(1){top:14px}
.nav-toggle span:nth-child(2){top:19.5px}
.nav-toggle span:nth-child(3){top:25px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){top:19.5px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){top:19.5px;transform:rotate(-45deg)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;padding:150px 0 72px;overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center right;
  opacity:.24;filter:saturate(.8);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(680px 320px at 18% 24%,rgba(47,107,255,.28),transparent 66%),
    linear-gradient(180deg,rgba(5,8,15,.62) 0%,rgba(5,8,15,.90) 62%,var(--bg-deep) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-3)}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--accent)}
.crumbs span.sep{opacity:.5}
.crumbs .current{color:var(--ink-2)}
.hero-brand{
  display:inline-flex;align-items:center;gap:9px;margin-bottom:22px;
  font-size:12.5px;letter-spacing:.18em;color:var(--ink-2);
  border:1px solid var(--line);border-radius:var(--pill);
  padding:7px 16px;background:rgba(255,255,255,.03);
}
.hero-title{font-size:clamp(34px,5vw,56px);margin-top:8px}
.hero-desc{margin-top:18px;max-width:660px;color:var(--ink-2);font-size:16.5px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:all 240ms var(--ease);
  border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#fff;
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 32px rgba(47,107,255,.34);
}
.btn-primary:hover{
  color:#fff;transform:translateY(-2px);filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(47,107,255,.7),0 14px 44px rgba(47,107,255,.46);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.98)}
.btn-ghost{
  background:rgba(255,255,255,.02);border-color:var(--line);color:var(--ink);
}
.btn-ghost:hover{background:rgba(255,255,255,.07);border-color:var(--line-strong);color:#fff;transform:translateY(-2px)}
.btn-link{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--ink-2)}
.btn-link::after{content:"→";color:var(--accent);transition:transform var(--t) var(--ease)}
.btn-link:hover{color:#fff}
.btn-link:hover::after{transform:translateX(4px)}

/* ---------- tag ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--pill);
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  color:var(--accent);background:rgba(22,227,182,.10);
  border:1px solid rgba(22,227,182,.24);
}
.tag-blue{color:#8FB2FF;background:rgba(47,107,255,.12);border-color:rgba(47,107,255,.28)}

/* ---------- 数据带 ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:30px 26px;position:relative}
.stat+.stat::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:1px;background:var(--line)}
.stat-num{
  font-family:var(--mono);font-size:30px;font-weight:700;color:var(--accent);
  letter-spacing:.02em;line-height:1.1;
}
.stat-label{margin-top:8px;font-size:13.5px;color:var(--ink-3)}

/* ---------- 卡片墙 ---------- */
.wall{display:grid;grid-template-columns:repeat(6,1fr);gap:24px}
.wall-card{
  grid-column:span 3;
  display:flex;flex-direction:column;
  background:var(--glass-strong);
  border:1px solid var(--line);
  border-radius:var(--radius-m);
  box-shadow:var(--shadow);
  overflow:hidden;
  transition:transform var(--t) var(--ease),border-color var(--t) var(--ease),box-shadow var(--t) var(--ease);
}
.wall-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.wall-card.span-row{grid-row:span 2}
.wall-card.span-sm{grid-column:span 2}
.wall-media{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(47,107,255,.18),rgba(22,227,182,.08));
  border-bottom:1px solid var(--line);
}
.wall-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 600ms var(--ease)}
.wall-card:hover .wall-media img{transform:scale(1.03)}
.wall-card.span-row .wall-media{aspect-ratio:auto;flex:1 1 auto;min-height:340px}
.wall-card:not(.span-row) .wall-media{aspect-ratio:16/9}
.wall-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:12px;flex:0 0 auto}
.wall-body h3{font-size:20px;line-height:1.4}
.wall-body p{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.wall-foot{
  margin-top:auto;padding:16px 26px 22px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13.5px;color:var(--ink-3);
}
.wall-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* ---------- 编号纵列 ---------- */
.flow{border-top:1px solid var(--line)}
.flow-item{
  display:grid;grid-template-columns:88px 1fr;gap:28px;
  padding:28px 0;border-bottom:1px solid var(--line);
  transition:background var(--t) var(--ease);
}
.flow-item:hover{background:rgba(255,255,255,.02)}
.flow-num{
  font-family:var(--mono);font-size:22px;font-weight:700;color:var(--brand);
  letter-spacing:.04em;padding-top:2px;
}
.flow-item h3{font-size:19px}
.flow-item p{margin-top:8px;color:var(--ink-2);font-size:15px;max-width:820px}
.flow-tags{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap}

/* ---------- 双栏不对称 ---------- */
.split{display:grid;grid-template-columns:1.35fr 1fr;gap:44px;align-items:start}
.panel{
  background:var(--glass-strong);border:1px solid var(--line);
  border-radius:var(--radius-l);padding:32px;box-shadow:var(--shadow);
}
.check-list li{
  position:relative;padding:12px 0 12px 26px;
  border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-2);
}
.check-list li:last-child{border-bottom:0}
.check-list li::before{
  content:"";position:absolute;left:0;top:22px;
  width:11px;height:6px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(-45deg);
}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  position:relative;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 0 22px 0;font-size:17px;font-weight:600;color:var(--ink);
  cursor:pointer;list-style:none;transition:color var(--t) var(--ease);
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{
  content:"＋";flex:0 0 auto;font-size:17px;font-weight:400;color:var(--ink-3);
  transition:transform var(--t) var(--ease),color var(--t) var(--ease);
}
.faq-item[open] .faq-q{color:#fff}
.faq-item[open] .faq-q::after{content:"×";transform:rotate(180deg);color:var(--accent)}
.faq-item[open] .faq-q::before{
  content:"";position:absolute;left:-18px;top:26px;bottom:26px;width:2px;
  background:linear-gradient(180deg,var(--brand),var(--accent));border-radius:2px;
}
.faq-a{padding:0 40px 26px 0;max-width:720px;color:var(--ink-2);font-size:15.5px;line-height:1.8}
.faq-q:hover{color:#fff}

/* ---------- CTA ---------- */
.cta-board{
  position:relative;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-l);
  padding:56px;text-align:center;box-shadow:var(--shadow);
}
.cta-board::before{
  content:"";position:absolute;inset:-40% -10% auto -10%;height:340px;
  background:radial-gradient(closest-side,rgba(47,107,255,.28),transparent);
  pointer-events:none;
}
.cta-board > *{position:relative;z-index:2}
.cta-board h2{font-size:clamp(24px,3vw,34px)}
.cta-board p{margin:16px auto 0;max-width:620px;color:var(--ink-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:32px}
.cta-board .ring{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:520px;height:520px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(255,106,61,.14),transparent 70%);
  pointer-events:none;z-index:1;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:9px;
  padding:12px 22px;border-radius:var(--pill);
  font-size:14.5px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--signal),#E24D22);
  box-shadow:0 0 0 1px rgba(255,106,61,.4),0 12px 34px rgba(255,106,61,.34);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:all 260ms var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{color:#fff;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,106,61,.6),0 16px 44px rgba(255,106,61,.46)}
.float-cta.is-visible:hover{transform:translateY(-2px)}
.float-cta::after{content:"↑";font-size:13px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:104px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,17,32,.7),rgba(5,8,15,.95));
  padding:72px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:0}
.footer-col{padding:0 28px;position:relative}
.footer-col:first-child{padding-left:0}
.footer-col:last-child{padding-right:0}
.footer-col+.footer-col::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:1px;background:var(--line)}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16.5px;color:var(--ink)}
.footer-col p{margin-top:16px;font-size:14px;color:var(--ink-3);line-height:1.8;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:18px;letter-spacing:.04em}
.footer-col ul li{margin-bottom:12px;font-size:14px;color:var(--ink-3)}
.footer-col ul li a{display:inline-block;color:var(--ink-3);transition:all var(--t) var(--ease)}
.footer-col ul li a:hover{color:var(--brand);transform:translateX(4px)}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);
  padding:24px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 620ms var(--ease),transform 620ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .split{grid-template-columns:1fr;gap:28px}
  .wall{grid-template-columns:repeat(4,1fr)}
  .wall-card{grid-column:span 2}
  .wall-card.span-sm{grid-column:span 2}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3)::before,.stat:nth-child(odd)::before{display:block}
  .stat:nth-child(3){border-top:1px solid var(--line)}
  .stat:nth-child(3)::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:40px}
  .footer-col:nth-child(odd){padding-left:0}
  .footer-col:nth-child(3)::before{display:none}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:56px 0}
  .container{padding:0 20px}
  .nav-inner{height:66px}
  .nav-links{
    position:fixed;inset:0;z-index:95;
    display:flex;flex-direction:column;align-items:flex-start;justify-content:center;
    gap:0;padding:0 32px;
    background:rgba(6,10,20,.94);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    transform:translateX(100%);transition:transform 280ms var(--ease);
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links a{font-size:20px;line-height:56px;width:100%;border-bottom:1px solid var(--line);color:var(--ink)}
  .nav-links a::after{display:none}
  .nav-links a.is-active::before{left:auto;right:4px}
  .nav-cta{display:none}
  .nav-toggle{display:block;z-index:96}
  .page-hero{padding:118px 0 56px}
  .hero-desc{font-size:15.5px}
  .wall{grid-template-columns:1fr}
  .wall-card,.wall-card.span-sm{grid-column:span 1}
  .wall-card.span-row{grid-row:span 1}
  .wall-card.span-row .wall-media{min-height:0;aspect-ratio:16/9}
  .flow-item{grid-template-columns:1fr;gap:10px}
  .flow-num{font-size:18px}
  .panel{padding:24px}
  .cta-board{padding:36px 24px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    justify-content:center;height:56px;padding:0 20px calc(0px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
  .site-footer{margin-top:72px;padding-top:56px;padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr;row-gap:32px}
  .footer-col{padding:0}
  .footer-col+.footer-col::before{display:none}
  .footer-bottom{justify-content:flex-start;padding-bottom:0}
}
@media (max-width:520px){
  .hero-title{font-size:clamp(28px,8vw,36px)}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .stat-band{grid-template-columns:1fr}
  .stat+.stat::before{display:none}
  .stat{border-top:1px solid var(--line)}
  .stat:first-child{border-top:0}
  .brand-sub{display:none}
  .cta-actions .btn{width:100%}
}

/* roulang page: category2 */
:root{
  --bg-deep:#05080F;
  --bg-layer:#0A1120;
  --glass:rgba(255,255,255,.055);
  --glass-strong:rgba(255,255,255,.07);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.20);
  --brand:#2F6BFF;
  --brand-deep:#1B49C4;
  --accent:#16E3B6;
  --signal:#FF6A3D;
  --ink:#E9F0FF;
  --ink-2:#A9B8D6;
  --ink-3:#6B7C9C;
  --radius:18px;
  --radius-lg:24px;
  --radius-img:16px;
  --container:1200px;
  --shadow:0 24px 60px rgba(0,0,0,.45);
  --shadow-hover:0 28px 72px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:220ms;
  --mono:"SFMono-Regular","Roboto Mono",Consolas,"HarmonyOS Sans",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 82% -8%, rgba(47,107,255,.16), transparent 62%),
    radial-gradient(700px 420px at 6% 32%, rgba(22,227,182,.07), transparent 60%),
    var(--bg-deep);
  color:var(--ink);
  font-family:"HarmonyOS Sans","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.8;
  font-weight:400;
  letter-spacing:.005em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--radius-img);}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em;line-height:1.3;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(47,107,255,.4);color:#fff;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1280px){:root{--container:1280px;}}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),backdrop-filter var(--dur) var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;height:78px;}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;}
.brand-dot{
  width:9px;height:9px;border-radius:50%;flex:0 0 auto;
  background:var(--brand);
  box-shadow:0 0 0 5px rgba(47,107,255,.16),0 0 18px rgba(47,107,255,.75);
}
.brand-sub{display:block;font-size:11.5px;font-weight:500;letter-spacing:.2em;color:var(--ink-3);margin-top:2px;}
.nav-links{display:flex;align-items:center;gap:34px;}
.nav-links a{
  position:relative;font-size:14.5px;color:var(--ink-2);padding-bottom:6px;
  transition:color var(--dur) var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur) var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(.34);}
.nav-links a.is-active{color:var(--ink);}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-links a.is-active::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--accent);margin-right:8px;vertical-align:2px;
  box-shadow:0 0 10px rgba(22,227,182,.8);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ink);
  padding:9px 18px;border:1px solid var(--line);border-radius:999px;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
  white-space:nowrap;
}
.nav-cta::after{content:"→";font-size:13px;color:var(--ink-3);transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);}
.nav-cta:hover{background:rgba(255,255,255,.06);border-color:var(--line-strong);transform:translateY(-1px);}
.nav-cta:hover::after{transform:translateX(3px);color:var(--accent);}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.03);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:17px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(5,8,15,.62),rgba(5,8,15,.94)),url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 320px at 78% 6%, rgba(47,107,255,.30), transparent 66%);
}
.page-hero .container{position:relative;z-index:1;padding-top:54px;padding-bottom:58px;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-3);margin-bottom:26px;}
.crumb a{color:var(--ink-3);transition:color var(--dur) var(--ease);}
.crumb a:hover{color:var(--ink);}
.crumb .sep{color:rgba(255,255,255,.22);}
.crumb .current{color:var(--ink-2);}
.hero-title{font-size:clamp(30px,4.4vw,48px);font-weight:800;line-height:1.24;max-width:820px;}
.hero-lead{margin-top:16px;font-size:16.5px;color:var(--ink-2);max-width:660px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;color:var(--ink-2);
  padding:6px 14px;border-radius:999px;
  background:var(--glass);border:1px solid var(--line);
}
.tag b{color:var(--accent);font-weight:600;}
.tag-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);}

/* ---------- generic section ---------- */
.section{padding:104px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:52px;}
.section-head h2{font-size:clamp(26px,3.1vw,34px);font-weight:800;}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px;}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.22em;color:var(--accent);
  text-transform:uppercase;margin-bottom:16px;
}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- steps timeline ---------- */
.timeline{position:relative;max-width:960px;}
.step{
  position:relative;
  display:grid;grid-template-columns:56px 1fr;gap:24px;
  padding-bottom:26px;
}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:27px;top:58px;bottom:0;width:1px;
  background:linear-gradient(180deg,rgba(47,107,255,.55),rgba(255,255,255,.07));
}
.step:last-child::before{display:none;}
.step-idx{
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:16px;font-weight:600;color:var(--accent);
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 12px 30px rgba(0,0,0,.4);
  position:relative;z-index:1;
}
.step-card{
  background:linear-gradient(180deg,var(--glass-strong),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
  padding:24px 28px;
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.step-card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.12);}
.step-card h3{font-size:20px;margin-bottom:10px;}
.step-card p{color:var(--ink-2);font-size:15.5px;}
.step-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.chip{
  font-size:12.5px;color:var(--ink-3);
  padding:4px 11px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);
}

/* ---------- stat band ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat-item{padding:32px 28px;position:relative;}
.stat-item + .stat-item::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:1px;background:var(--line);
}
.stat-num{
  font-family:var(--mono);font-size:38px;font-weight:600;color:var(--brand);
  line-height:1.1;letter-spacing:-.01em;
}
.stat-num small{font-size:15px;color:var(--ink-3);margin-left:6px;font-family:inherit;}
.stat-label{display:block;margin-top:8px;font-size:14px;color:var(--ink-2);}

/* ---------- asymmetric checklist ---------- */
.asym{display:grid;grid-template-columns:minmax(0,42fr) minmax(0,58fr);gap:56px;align-items:start;}
.asym h2{font-size:clamp(24px,2.8vw,32px);font-weight:800;}
.asym .asym-lead{margin-top:16px;color:var(--ink-2);font-size:15.5px;}
.text-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:14.5px;color:var(--accent);
  transition:gap var(--dur) var(--ease),color var(--dur) var(--ease);
}
.text-link:hover{gap:13px;color:#4ff0c9;}
.check-list{border-top:1px solid var(--line);}
.check-item{display:grid;grid-template-columns:44px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);}
.check-item span.check-num{font-family:var(--mono);font-size:14px;color:var(--accent);padding-top:4px;}
.check-item strong{display:block;font-size:16px;font-weight:600;margin-bottom:6px;}
.check-item p{color:var(--ink-2);font-size:14.5px;}

/* ---------- content cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;}
.content-card{
  display:flex;flex-direction:column;
  background:linear-gradient(180deg,var(--glass-strong),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.content-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.12);}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:0;}
.card-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 520ms var(--ease);}
.content-card:hover .card-cover img{transform:scale(1.03);}
.card-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,0) 40%,rgba(5,8,15,.72));
}
.card-body{padding:22px 26px 24px;display:flex;flex-direction:column;flex:1;}
.card-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.pill{
  font-size:12px;color:#BBD0FF;padding:4px 11px;border-radius:999px;
  background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.38);
}
.card-date{font-size:13px;color:var(--ink-3);font-family:var(--mono);}
.card-body h3{font-size:19px;line-height:1.45;margin-bottom:10px;}
.card-body .excerpt{color:var(--ink-2);font-size:14.5px;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;}
.card-foot span{font-size:13px;color:var(--ink-3);}
.card-foot em{font-style:normal;font-size:13.5px;color:var(--accent);display:inline-flex;gap:6px;align-items:center;transition:gap var(--dur) var(--ease);}
.content-card:hover .card-foot em{gap:11px;}

/* ---------- faq ---------- */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  position:relative;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 18px 22px 20px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity var(--dur) var(--ease);
}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-size:20px;line-height:1;color:var(--ink-3);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.faq-item[open] summary::before{opacity:1;}
.faq-item[open] summary::after{content:"×";color:var(--accent);transform:rotate(180deg);}
.faq-item summary:hover{background:rgba(255,255,255,.03);}
.faq-body{padding:0 20px 24px 32px;max-width:720px;color:var(--ink-2);font-size:15.5px;line-height:1.8;}

/* ---------- cta band ---------- */
.cta-band{
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.12);
  padding:56px 48px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 260px at 50% 0%, rgba(255,106,61,.16), transparent 70%);
}
.cta-band h2{position:relative;font-size:clamp(24px,3vw,32px);font-weight:800;}
.cta-band p{position:relative;margin-top:14px;color:var(--ink-2);font-size:16px;}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:18px;justify-content:center;align-items:center;margin-top:32px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  padding:13px 26px;border-radius:12px;border:1px solid transparent;cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 0 1px rgba(47,107,255,.55),0 10px 32px rgba(47,107,255,.34);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(47,107,255,.7),0 14px 44px rgba(47,107,255,.5);filter:brightness(1.06);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(47,107,255,.55),0 6px 18px rgba(47,107,255,.3);}
.btn-signal{
  background:linear-gradient(135deg,#2F6BFF,#1B49C4);
  box-shadow:0 0 0 1px rgba(255,106,61,.55),0 12px 40px rgba(255,106,61,.34);
}
.btn-signal:hover{box-shadow:0 0 0 1px rgba(255,106,61,.75),0 16px 46px rgba(255,106,61,.46);}
.btn-ghost{
  color:var(--ink);background:transparent;border-color:var(--line);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:var(--line-strong);transform:translateY(-2px);}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:130;
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#2F6BFF,#1B49C4);
  box-shadow:0 0 0 1px rgba(255,106,61,.4),0 12px 34px rgba(255,106,61,.3);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity 260ms var(--ease),transform 260ms var(--ease);
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto;}
.float-cta:hover{transform:translateY(-2px);}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-layer);margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:0;}
.footer-col{padding:56px 28px;position:relative;}
.footer-col:first-child{padding-left:0;}
.footer-col + .footer-col::before{content:"";position:absolute;left:0;top:56px;bottom:56px;width:1px;background:var(--line);}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;margin-bottom:14px;}
.footer-col p{color:var(--ink-2);font-size:14px;line-height:1.85;max-width:300px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:18px;color:var(--ink);}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul a,.footer-col ul li{color:var(--ink-2);font-size:14px;}
.footer-col ul a{transition:color var(--dur) var(--ease),transform var(--dur) var(--ease);display:inline-block;}
.footer-col ul a:hover{color:var(--brand);transform:translateX(4px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding:22px 0;font-size:13px;color:var(--ink-3);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 520ms var(--ease),transform 520ms var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .section{padding:72px 0;}
  .asym{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col{padding:40px 24px;}
  .footer-col:first-child{padding-left:24px;}
  .footer-col:nth-child(3)::before{display:none;}
  .footer-col:nth-child(n+3){border-top:1px solid var(--line);}
  .stat-band{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(3)::before{display:none;}
  .stat-item:nth-child(n+3){border-top:1px solid var(--line);}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .nav-links{
    position:fixed;inset:0;z-index:110;
    flex-direction:column;justify-content:center;gap:0;
    padding:96px 28px 48px;
    background:rgba(5,8,15,.96);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    transform:translateY(-100%);opacity:0;pointer-events:none;
    transition:transform 280ms var(--ease),opacity 280ms var(--ease);
  }
  .nav-links.is-open{transform:none;opacity:1;pointer-events:auto;}
  .nav-links a{font-size:20px;line-height:56px;width:100%;border-bottom:1px solid var(--line);padding-bottom:0;}
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--accent);}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .page-hero .container{padding-top:40px;padding-bottom:44px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .step{grid-template-columns:44px 1fr;gap:16px;}
  .step-idx{width:44px;height:44px;font-size:14px;}
  .step::before{left:21px;top:48px;}
  .step-card{padding:20px;}
  .card-grid{grid-template-columns:1fr;}
  .card-body{padding:20px;}
  .cta-band{padding:40px 22px;}
  .faq-item summary{font-size:16px;padding:20px 12px 20px 18px;}
  .faq-body{padding:0 18px 22px 30px;}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;
    justify-content:center;padding:17px 20px calc(17px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col{padding:32px 0;border-top:1px solid var(--line);}
  .footer-col:first-child{padding-left:0;border-top:0;}
  .footer-col + .footer-col::before{display:none;}
  .footer-col:nth-child(3){border-top:1px solid var(--line);}
}
@media (max-width:520px){
  .hero-title{font-size:27px;}
  .stat-band{grid-template-columns:1fr;}
  .stat-item + .stat-item::before{display:none;}
  .stat-item{border-top:1px solid var(--line);padding:22px 4px;}
  .stat-item:first-child{border-top:0;}
  .stat-num{font-size:32px;}
  .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .cta-actions .text-link{margin-top:6px;justify-content:center;width:100%;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
  .brand-dot{box-shadow:none;}
}