/* roulang page: index */
:root{
  --bg-void:#07070C;
  --bg-deep:#0C0D16;
  --surface-1:#12131F;
  --surface-2:#1A1C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --nebula:#6E4BFF;
  --neon:#35E6FF;
  --pearl:#F4F1EA;
  --text:#EDEFF7;
  --muted:#9AA0BF;
  --dim:#6B7091;
  --ok:#3ED598;
  --warn:#F5A524;
  --danger:#FF5E6C;
  --grad:linear-gradient(90deg,var(--nebula),var(--neon));
  --r-card:18px;
  --r-img:14px;
  --r-tag:6px;
  --r-input:12px;
  --shadow-1:0 0 0 1px rgba(255,255,255,.06),0 18px 40px rgba(0,0,0,.5);
  --glow:0 0 26px rgba(53,230,255,.22);
  --font:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk",Inter,"SF Mono",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-void);
  color:var(--text);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 0%,transparent 78%);
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 0%,transparent 78%);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
input,textarea,select{font:inherit}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:6px}
::selection{background:rgba(110,75,255,.45);color:#fff}

h1{font-size:clamp(30px,4vw,50px);font-weight:800;line-height:1.2;letter-spacing:-.02em}
h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;line-height:1.3;letter-spacing:-.01em}
h3{font-size:20px;font-weight:700;line-height:1.5}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
main,.site-footer{position:relative;z-index:1}

/* ===== 顶栏 ===== */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(10,11,18,.88);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(110,75,255,.6),rgba(53,230,255,.7),transparent);
  pointer-events:none;
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:26px;height:26px;flex:0 0 auto;filter:drop-shadow(0 0 6px rgba(53,230,255,.35))}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--text);white-space:nowrap}
.main-nav{display:flex;align-items:center;justify-content:center;gap:6px;flex:1;margin:0 8px}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:var(--muted);border-radius:8px;
  transition:color .25s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .3s cubic-bezier(.22,1,.36,1);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(.4)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{transform:scaleX(1);box-shadow:0 0 6px rgba(53,230,255,.85)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong);
  transition:border-color .25s;
}
.nav-toggle:hover{border-color:rgba(53,230,255,.5)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .3s,opacity .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .25s cubic-bezier(.22,1,.36,1),box-shadow .25s,color .25s,border-color .25s,background .25s;
}
.btn-primary{
  color:var(--text);
  background-image:linear-gradient(180deg,rgba(110,75,255,.30),rgba(53,230,255,.12)),var(--grad);
  background-origin:border-box;
  background-clip:padding-box,border-box;
  border:1px solid transparent;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 26px rgba(53,230,255,.28)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 12px rgba(53,230,255,.2)}
.btn-ghost{color:var(--muted);border-color:var(--line-strong);background:rgba(18,19,31,.5)}
.btn-ghost:hover{color:var(--text);border-color:rgba(53,230,255,.55);box-shadow:0 0 18px rgba(53,230,255,.16);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:36px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}

/* ===== 板块通用 ===== */
.section{padding:96px 0;position:relative}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-desc{font-size:15px;color:var(--muted);margin-top:10px;max-width:660px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.14em;color:var(--neon);
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--grad)}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--neon);
  transition:color .25s;
}
.text-link::after{content:"→";transition:transform .3s cubic-bezier(.22,1,.36,1)}
.text-link:hover::after{transform:translateX(4px)}
.badge{
  display:inline-flex;align-items:center;font-size:12px;line-height:1.6;
  padding:2px 10px;border-radius:var(--r-tag);
  border:1px solid rgba(53,230,255,.28);color:var(--neon);background:rgba(53,230,255,.07);
}
.post-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--dim);flex-wrap:wrap}
.post-meta time{font-family:var(--font-num);letter-spacing:.02em}

/* ===== 首屏 ===== */
.hero{position:relative;padding:88px 0 96px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-340px;left:50%;transform:translateX(-50%);
  width:1200px;height:640px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(110,75,255,.16),rgba(53,230,255,.06) 46%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-copy h1{margin-top:20px}
.hero-sub{font-size:17px;color:var(--muted);margin-top:20px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero-tags li{
  font-size:13px;color:var(--muted);padding:6px 14px;border-radius:var(--r-tag);
  border:1px solid var(--line);background:var(--surface-1);
}
.hero-media{display:flex;justify-content:flex-end}
.phone-frame{
  position:relative;width:min(100%,316px);aspect-ratio:9/16;
  border-radius:22px;border:1px solid var(--line-strong);
  background:var(--surface-1);overflow:hidden;box-shadow:var(--shadow-1);
}
.phone-frame img{width:100%;height:100%;object-fit:cover}
.phone-top{
  position:absolute;top:0;left:0;right:0;z-index:3;
  display:flex;align-items:center;gap:8px;padding:12px 14px;
  font-size:12px;color:var(--pearl);
  background:linear-gradient(180deg,rgba(7,7,12,.88),transparent);
}
.rec-dot{width:7px;height:7px;border-radius:50%;background:var(--danger);box-shadow:0 0 8px var(--danger)}
.phone-progress{
  position:absolute;left:12px;right:12px;bottom:16px;z-index:3;height:3px;border-radius:3px;
  background:rgba(255,255,255,.14);overflow:hidden;
}
.phone-progress span{display:block;width:62%;height:100%;background:var(--grad);box-shadow:0 0 10px rgba(53,230,255,.6)}
.phone-float{
  position:absolute;right:12px;bottom:44px;z-index:3;
  display:flex;flex-direction:column;align-items:flex-start;
  padding:10px 14px;border-radius:var(--r-input);
  background:rgba(12,13,22,.84);border:1px solid var(--line-strong);
}
.phone-float strong{
  font-family:var(--font-num);font-size:20px;line-height:1.2;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.phone-float span{font-size:12px;color:var(--muted)}

/* ===== 片段卡流 ===== */
.clip-rail{
  display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px max(24px,calc((100vw - 1280px)/2 + 24px)) 22px;
  scrollbar-width:none;
}
.clip-rail::-webkit-scrollbar{display:none}
.clip-card{
  position:relative;flex:0 0 220px;aspect-ratio:9/16;
  border-radius:var(--r-img);overflow:hidden;background:var(--surface-2);
  border:1px solid var(--line);scroll-snap-align:start;
  transition:transform .35s cubic-bezier(.22,1,.36,1),border-color .35s,box-shadow .35s;
}
.clip-card img{width:100%;height:100%;object-fit:cover}
.clip-card::after{
  content:"";position:absolute;inset:auto 0 0 0;height:62%;
  background:linear-gradient(180deg,transparent,rgba(7,7,12,.94));
}
.clip-card:hover{transform:translateY(-4px);border-color:var(--neon);box-shadow:var(--glow)}
.clip-tag{
  position:absolute;top:10px;left:10px;z-index:2;
  font-size:12px;padding:3px 9px;border-radius:var(--r-tag);
  background:rgba(18,19,31,.84);border:1px solid var(--line-strong);color:var(--muted);
}
.clip-title{
  position:absolute;left:12px;right:12px;bottom:12px;z-index:2;
  font-size:14px;line-height:1.35;font-weight:600;
}
.clip-play{position:absolute;inset:0;z-index:3;display:grid;place-items:center;opacity:0;transition:opacity .3s}
.clip-play span{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(255,255,255,.35);background:rgba(10,11,18,.55);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.clip-play span::before{
  content:"";margin-left:3px;
  border-left:11px solid var(--neon);border-top:7px solid transparent;border-bottom:7px solid transparent;
}
.clip-card:hover .clip-play{opacity:.9}

/* ===== 编号清单 ===== */
.check-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.check-side{position:sticky;top:104px}
.check-side h2{margin-top:16px}
.check-side p{color:var(--muted);margin-top:16px;max-width:380px}
.check-side .btn{margin-top:28px}
.check-list{border-top:1px solid var(--line)}
.check-item{
  position:relative;display:flex;align-items:center;gap:20px;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:padding-left .3s cubic-bezier(.22,1,.36,1);
}
.check-item::before{
  content:"";position:absolute;left:-2px;top:14%;bottom:14%;width:2px;border-radius:2px;
  background:var(--grad);opacity:0;transition:opacity .3s;
}
.check-item:hover::before{opacity:1}
.check-item:hover{padding-left:12px}
.check-num{
  flex:0 0 44px;font-family:var(--font-num);font-size:20px;font-weight:700;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.check-body{flex:1;min-width:0}
.check-body h3{font-size:19px}
.check-body p{font-size:14.5px;color:var(--muted);margin-top:6px;line-height:1.7}
.check-item img{
  width:96px;height:96px;flex:0 0 auto;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--line);
}

/* ===== 最新信息 ===== */
.filter-tabs{display:flex;gap:8px;flex-wrap:wrap}
.tab{
  font-size:13px;color:var(--muted);padding:5px 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface-1);
  transition:color .25s,border-color .25s;
}
.tab.active{color:var(--neon);border-color:rgba(53,230,255,.4);background:rgba(53,230,255,.06)}
.post-feature{
  display:grid;grid-template-columns:6fr 4fr;gap:32px;
  border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--surface-1);overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color .3s;
}
.post-feature:hover{border-color:rgba(53,230,255,.45)}
.post-feature__media{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.post-feature__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.22,1,.36,1)}
.post-feature:hover .post-feature__media img{transform:scale(1.03)}
.post-feature__body{display:flex;flex-direction:column;gap:14px;padding:32px 32px 32px 0}
.post-feature__body h3{font-size:22px;line-height:1.45}
.post-feature__body h3 a{transition:color .25s}
.post-feature__body h3 a:hover{color:var(--neon)}
.post-feature__body p{font-size:15px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-feature__body .text-link{margin-top:auto}
.post-rows{display:flex;flex-direction:column;gap:16px;margin-top:24px}
.post-row{
  display:grid;grid-template-columns:200px 1fr;gap:20px;padding:16px;
  border-radius:var(--r-card);border:1px solid var(--line);background:var(--surface-1);
  transition:border-color .3s,transform .3s cubic-bezier(.22,1,.36,1);
}
.post-row:hover{border-color:rgba(53,230,255,.4);transform:translateY(-3px)}
.post-row__thumb{display:block;aspect-ratio:16/9;border-radius:var(--r-img);overflow:hidden;background:var(--surface-2)}
.post-row__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.22,1,.36,1)}
.post-row:hover .post-row__thumb img{transform:scale(1.05)}
.post-row__body h3{font-size:18px;line-height:1.5}
.post-row__body h3 a{transition:color .25s}
.post-row__body h3 a:hover{color:var(--neon)}
.post-row__body p{
  font-size:14.5px;color:var(--muted);margin-top:8px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-row__body .post-meta{margin-top:12px}

/* ===== 空态 ===== */
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:18px;
  padding:72px 24px;border:1px dashed var(--line-strong);border-radius:var(--r-card);
  color:var(--dim);text-align:center;
}
.empty-state svg{width:120px;height:120px;opacity:.55}
.empty-state p{font-size:15px}

/* ===== 口碑条 ===== */
.voice-rail{
  display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px max(24px,calc((100vw - 1280px)/2 + 24px)) 22px;
  scrollbar-width:none;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent);
  mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent);
}
.voice-rail::-webkit-scrollbar{display:none}
.voice-card{
  flex:0 0 300px;scroll-snap-align:start;padding:22px;
  border-radius:var(--r-card);border:1px solid var(--line);background:var(--surface-1);
  transition:border-color .3s,transform .3s cubic-bezier(.22,1,.36,1);
}
.voice-card:hover{border-color:rgba(53,230,255,.4);transform:translateY(-4px)}
.voice-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,rgba(110,75,255,.75),rgba(53,230,255,.5));
}
.voice-top strong{font-size:14.5px;display:block;line-height:1.5}
.voice-top span{font-size:12.5px;color:var(--dim)}
.stars{color:var(--pearl);letter-spacing:2px;font-size:13px;margin:14px 0 10px;opacity:.85}
.voice-card p{font-size:14.5px;color:var(--muted);line-height:1.75}
.voice-card time{display:block;font-size:12.5px;color:var(--dim);margin-top:14px}

/* ===== CTA ===== */
.cta-band{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:44px 48px;border-radius:var(--r-card);overflow:hidden;
  background:linear-gradient(120deg,rgba(110,75,255,.18),rgba(53,230,255,.08) 60%,transparent);
  border:1px solid var(--line-strong);
}
.cta-band::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:var(--grad)}
.cta-band h2{font-size:clamp(20px,2.2vw,26px)}
.cta-band p{color:var(--muted);margin-top:12px;font-size:15px;max-width:620px}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:104px}
.faq-side h2{margin-top:16px}
.faq-side p{color:var(--muted);margin-top:16px;max-width:360px}
.faq-list{display:flex;flex-direction:column}
.faq-item{position:relative;padding-left:18px;border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item::before{
  content:"";position:absolute;left:0;top:16%;bottom:16%;width:2px;border-radius:2px;
  background:var(--grad);opacity:0;transition:opacity .3s;
}
.faq-item[open]::before{opacity:1}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:68px;padding:22px 0;cursor:pointer;list-style:none;
  font-size:16.5px;font-weight:600;color:var(--text);transition:color .25s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--neon)}
.faq-item summary i{position:relative;flex:0 0 auto;width:18px;height:18px}
.faq-item summary i::before,
.faq-item summary i::after{
  content:"";position:absolute;background:var(--neon);border-radius:2px;
  transition:transform .3s,opacity .3s;
}
.faq-item summary i::before{left:0;right:0;top:8px;height:2px}
.faq-item summary i::after{top:0;bottom:0;left:8px;width:2px}
.faq-item[open] summary i::after{transform:rotate(90deg);opacity:0}
.faq-answer{padding:0 0 24px}
.faq-answer p{font-size:15.5px;line-height:1.85;color:var(--muted);max-width:720px}

/* ===== 页脚 ===== */
.site-footer{
  position:relative;z-index:1;border-top:1px solid var(--line);
  background:var(--bg-deep);padding:72px 0 32px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(110,75,255,.5),rgba(53,230,255,.55),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{font-size:14.5px;color:var(--muted);margin-top:16px;max-width:320px;line-height:1.8}
.footer-col h4{
  font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--dim);
  text-transform:uppercase;margin-bottom:18px;
}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14.5px;color:var(--muted);transition:color .25s}
.footer-col a:hover{color:var(--neon)}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.8}
.footer-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  font-size:13px;color:var(--dim);
}

/* ===== 移动端一键直达 ===== */
.mobile-bar{display:none}

/* ===== 入场动效 ===== */
.reveal{opacity:0;transform:translateY(12px);
  transition:opacity .5s cubic-bezier(.22,1,.36,1),transform .5s cubic-bezier(.22,1,.36,1);}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .nav-wrap{gap:16px}
  .main-nav{margin:0 4px}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero{padding:64px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-media{justify-content:center}
  .phone-frame{width:min(100%,300px)}
  .check-grid{grid-template-columns:1fr;gap:32px}
  .check-side{position:static}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .post-feature{grid-template-columns:1fr}
  .post-feature__body{padding:0 24px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}

  .nav-wrap{height:60px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;bottom:0;z-index:118;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    margin:0;padding:16px 24px 120px;
    background:rgba(7,7,12,.98);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    overflow-y:auto;
    opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-10px);
    transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
  }
  .main-nav.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .main-nav .nav-link{
    font-size:17px;padding:18px 4px;border-radius:0;
    border-bottom:1px solid var(--line);
  }
  .main-nav .nav-link::after{display:none}
  .main-nav .nav-link.active{color:var(--neon)}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:48px 0}
  .hero{padding:48px 0 56px}
  .section-head{margin-bottom:28px}
  .hero-actions{gap:12px}
  .hero-actions .btn{width:100%}
  .check-item{gap:14px}
  .check-item img{width:72px;height:72px}
  .check-num{flex:0 0 34px;font-size:18px}
  .post-row{grid-template-columns:1fr;gap:14px}
  .post-feature__body{padding:0 18px 22px;gap:12px}
  .post-feature__body h3{font-size:19px}
  .clip-card{flex:0 0 160px}
  .voice-card{flex:0 0 258px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 22px}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;gap:8px;margin-top:40px}
  .mobile-bar{
    display:flex;position:fixed;left:12px;right:12px;bottom:12px;z-index:110;
    opacity:0;transform:translateY(14px);pointer-events:none;
    transition:opacity .35s ease,transform .35s cubic-bezier(.22,1,.36,1);
  }
  .mobile-bar.show{opacity:1;transform:none;pointer-events:auto}
  .mobile-bar a{
    display:flex;align-items:center;justify-content:center;width:100%;height:56px;
    border-radius:999px;font-size:15px;font-weight:700;color:#06070C;
    background:linear-gradient(90deg,rgba(110,75,255,.95),rgba(53,230,255,.85));
    box-shadow:0 12px 32px rgba(53,230,255,.26);
  }
  .nav-actions .btn{display:none}
}
@media (max-width:480px){
  .brand-text{font-size:15px}
  .hero-tags li{font-size:12px;padding:5px 11px}
  .phone-frame{width:100%;aspect-ratio:4/5}
  .phone-float{right:10px;bottom:40px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --bg-void:#07070C;
  --bg-deep:#0C0D16;
  --surface-1:#12131F;
  --surface-2:#1A1C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --nebula:#6E4BFF;
  --neon:#35E6FF;
  --pearl:#F4F1EA;
  --text:#EDEFF7;
  --muted:#9AA0BF;
  --dim:#6B7091;
  --ok:#3ED598;
  --warn:#F5A524;
  --danger:#FF5E6C;
  --r-card:18px;
  --r-img:14px;
  --r-tag:6px;
  --r-btn:999px;
  --r-input:12px;
  --shadow-1:0 0 0 1px rgba(255,255,255,.06), 0 18px 40px rgba(0,0,0,.5);
  --shadow-glow:0 0 26px rgba(53,230,255,.22);
  --grad-h:linear-gradient(90deg,#6E4BFF,#35E6FF);
  --grad-v:linear-gradient(180deg,#6E4BFF,#35E6FF);
  --ease:cubic-bezier(.22,1,.36,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg-void);
  background-image:
    radial-gradient(600px 420px at 78% -6%, rgba(110,75,255,.13), transparent 70%),
    radial-gradient(520px 380px at 8% 6%, rgba(53,230,255,.08), transparent 72%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.032) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(255,255,255,.032) 0 1px, transparent 1px 48px);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease);}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select{font:inherit;}
::selection{background:rgba(110,75,255,.4);color:#fff;}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:6px;}
::-webkit-scrollbar{height:8px;width:8px;}
::-webkit-scrollbar-track{background:var(--bg-deep);}
::-webkit-scrollbar-thumb{background:rgba(110,75,255,.5);border-radius:8px;}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;}
.narrow{max-width:1120px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,11,18,.86);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:var(--grad-h);opacity:.55;
}
.nav-wrap{display:flex;align-items:center;gap:24px;min-height:var(--nav-h);}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:30px;height:30px;flex:0 0 auto;}
.brand-text{
  font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;
  background:linear-gradient(90deg,#FFFFFF 10%,#CFD4F5 60%,#8FE9FF 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--muted);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  border-radius:2px;background:var(--grad-h);opacity:0;transform:scaleX(.4);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{opacity:.45;transform:scaleX(1);}
.nav-link.active{color:var(--text);background:rgba(110,75,255,.12);}
.nav-link.active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 6px rgba(53,230,255,.75);}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);align-items:center;justify-content:center;
  flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s var(--ease),opacity .2s var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1px solid transparent;transition:transform .25s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease),color .25s var(--ease);
}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-primary{
  background:rgba(110,75,255,.18);
  border-color:rgba(53,230,255,.55);
  color:var(--text);
  box-shadow:0 0 0 1px rgba(110,75,255,.25) inset;
}
.btn-primary:hover{
  background:rgba(110,75,255,.3);
  box-shadow:var(--shadow-glow);
  transform:translateY(-2px);
}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{border-color:var(--line-strong);color:var(--muted);}
.btn-ghost:hover{color:var(--text);border-color:rgba(53,230,255,.5);transform:translateY(-2px);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;pointer-events:none;}

/* ---------- breadcrumb ---------- */
.crumb{padding:28px 0 0;font-size:13px;color:var(--dim);line-height:1.6;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li::after{content:"/";color:rgba(255,255,255,.18);}
.crumb li:last-child::after{display:none;}
.crumb a{color:var(--dim);}
.crumb a:hover{color:var(--neon);}
.crumb .now{color:var(--muted);max-width:460px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- article head ---------- */
.article-head{
  position:relative;padding:40px 0 32px;
  border-bottom:1px solid var(--line);
}
.article-head::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.14;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
}
.article-head-inner{position:relative;max-width:860px;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border-radius:var(--r-tag);font-size:12px;letter-spacing:.04em;
  color:#BFEFFF;background:rgba(53,230,255,.1);border:1px solid rgba(53,230,255,.28);
}
.article-head h1{
  margin:18px 0 16px;
  font-size:clamp(28px,4.2vw,50px);
  letter-spacing:-.02em;line-height:1.2;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--dim);}
.meta-row span{display:inline-flex;align-items:center;gap:6px;}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22);}
.meta-row .tag{color:var(--muted);}

/* ---------- cover ---------- */
.cover{
  margin:32px 0 0;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);background:var(--surface-1);
  box-shadow:var(--shadow-1);
}
.cover img{width:100%;aspect-ratio:21/9;object-fit:cover;}
.cover figcaption{padding:12px 16px;font-size:13px;color:var(--dim);border-top:1px solid var(--line);}

/* ---------- layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;
  padding:48px 0 8px;align-items:start;
}
.article-main{min-width:0;}

/* ---------- article body ---------- */
.article-body{
  max-width:760px;font-size:17px;line-height:1.9;color:#D9DCEA;
}
.article-body > * + *{margin-top:1.2em;}
.article-body h2{
  margin-top:40px;font-size:clamp(22px,2.4vw,32px);color:var(--text);
  padding-left:16px;border-left:3px solid;border-image:var(--grad-v) 1;
  letter-spacing:-.01em;
}
.article-body h3{margin-top:32px;font-size:21px;color:var(--text);letter-spacing:.01em;}
.article-body h4{margin-top:24px;font-size:17px;color:var(--text);}
.article-body p{margin:0;}
.article-body a{color:var(--neon);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;}
.article-body a:hover{color:#8FF3FF;}
.article-body strong{color:#fff;font-weight:700;}
.article-body ul,.article-body ol{padding-left:4px;display:grid;gap:10px;}
.article-body ul li{position:relative;padding-left:20px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:14px;width:7px;height:7px;border-radius:2px;
  background:var(--grad-h);transform:rotate(45deg);
}
.article-body ol{counter-reset:step;}
.article-body ol li{counter-increment:step;position:relative;padding-left:38px;}
.article-body ol li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:2px;font-size:14px;font-weight:800;letter-spacing:.02em;
  color:transparent;background:var(--grad-h);-webkit-background-clip:text;background-clip:text;
}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;border-left:2px solid var(--neon);
  background:linear-gradient(90deg,rgba(53,230,255,.07),transparent 70%);
  border-radius:0 var(--r-img) var(--r-img) 0;color:#C9CDE0;
}
.article-body blockquote::before{
  content:"“";display:block;font-size:34px;line-height:1;color:var(--pearl);opacity:.7;margin-bottom:4px;
}
.article-body img{border-radius:var(--r-img);margin:8px auto;border:1px solid var(--line);}
.article-body figure{margin:24px 0;}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--dim);}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;}
.article-body th{background:var(--surface-2);color:var(--text);font-weight:700;}
.article-body tr:last-child td{border-bottom:0;}
.article-body hr{border:0;height:1px;background:var(--grad-h);opacity:.28;margin:36px 0;}

/* ---------- empty state ---------- */
.empty-state{
  max-width:760px;padding:56px 24px;text-align:center;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
}
.empty-state svg{width:120px;height:120px;margin:0 auto 18px;display:block;opacity:.5;}
.empty-state h2{font-size:20px;color:var(--muted);margin-bottom:8px;}
.empty-state p{font-size:14px;color:var(--dim);margin-bottom:22px;}

/* ---------- tag row ---------- */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  max-width:760px;margin:40px 0 0;padding-top:24px;border-top:1px solid var(--line);
}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;
  border-radius:var(--r-tag);font-size:13px;color:var(--muted);
  background:var(--surface-1);border:1px solid var(--line);
}
.tag:hover{color:var(--text);border-color:rgba(53,230,255,.45);}
.tag-row .back{margin-left:auto;font-size:13px;color:var(--neon);}
.tag-row .back:hover{text-decoration:underline;text-underline-offset:3px;}

/* ---------- sidebar ---------- */
.article-side{position:sticky;top:calc(var(--nav-h) + 24px);display:grid;gap:20px;}
.side-card{
  padding:20px;border-radius:var(--r-card);
  background:var(--surface-1);border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.side-card h3{
  font-size:13px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--dim);margin-bottom:14px;
}
.toc-list{display:grid;gap:2px;}
.toc-list a{
  display:block;padding:8px 10px;border-left:2px solid transparent;
  font-size:14px;color:var(--muted);line-height:1.6;border-radius:0 8px 8px 0;
}
.toc-list a:hover{color:var(--text);background:var(--surface-2);}
.toc-list a.current{color:var(--text);border-left-color:var(--neon);background:rgba(53,230,255,.08);}
.hot-list{display:grid;gap:12px;}
.hot-list a{display:grid;gap:4px;padding:10px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line);}
.hot-list a:hover{border-color:rgba(53,230,255,.45);transform:translateY(-2px);transition:transform .25s var(--ease);}
.hot-list .hot-t{font-size:14px;line-height:1.5;color:var(--text);}
.hot-list .hot-m{font-size:12px;color:var(--dim);}

/* ---------- related ---------- */
.section{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.section-head h2{font-size:clamp(22px,2.6vw,32px);}
.section-head p{font-size:14px;color:var(--dim);margin-top:8px;}
.section-head .more{font-size:14px;color:var(--neon);}
.section-head .more:hover{text-decoration:underline;text-underline-offset:4px;}
.rel-list{display:grid;gap:16px;}
.rel-card{
  display:grid;grid-template-columns:200px minmax(0,1fr);gap:20px;align-items:center;
  padding:16px;border-radius:var(--r-card);
  background:var(--surface-1);border:1px solid var(--line);
  box-shadow:var(--shadow-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.55);box-shadow:var(--shadow-1),var(--shadow-glow);}
.rel-card img{width:200px;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);background:var(--surface-2);}
.rel-card h3{font-size:18px;margin-bottom:8px;}
.rel-card p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-meta{margin-top:10px;font-size:12px;color:var(--dim);font-style:italic;}

/* ---------- prev / next ---------- */
.pn-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.pn-card{
  display:grid;gap:8px;padding:22px;border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(26,28,43,.9),rgba(18,19,31,.9));
  border:1px solid var(--line);transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.pn-card:hover{transform:translateY(-4px);border-color:rgba(110,75,255,.6);box-shadow:var(--shadow-glow);}
.pn-card .pn-label{font-size:12px;letter-spacing:.08em;color:var(--dim);text-transform:uppercase;}
.pn-card .pn-title{font-size:17px;font-weight:700;color:var(--text);}
.pn-card .pn-sub{font-size:13px;color:var(--muted);}
.pn-card.next{text-align:right;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  background:linear-gradient(135deg,rgba(110,75,255,.22),rgba(12,13,22,.9) 60%);
  border:1px solid var(--line);border-top:1px solid rgba(53,230,255,.6);
  padding:36px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow-1);
}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(53,230,255,.22),transparent 68%);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:8px;}
.cta-band p{font-size:14px;color:var(--muted);}
.cta-band .btn{position:relative;z-index:1;}

/* ---------- footer ---------- */
.site-footer{
  margin-top:48px;border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(12,13,22,.9),var(--bg-void));
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding:64px 24px 40px;
}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);max-width:300px;}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--dim);margin-bottom:16px;}
.footer-col ul{display:grid;gap:12px;}
.footer-col li a,.footer-col li p{font-size:14px;color:var(--muted);}
.footer-col li a:hover{color:var(--neon);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 24px 32px;border-top:1px solid var(--line);
}
.footer-bottom p{font-size:13px;color:var(--dim);}

/* ---------- motion ---------- */
.fade-up{opacity:0;transform:translateY(12px);}
.fade-up.in{opacity:1;transform:none;transition:opacity .5s var(--ease),transform .5s var(--ease);}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .fade-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:36px;}
}
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:36px;}
  .article-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr));}
  .rel-card{grid-template-columns:180px minmax(0,1fr);}
  .rel-card img{width:180px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  :root{--nav-h:60px;}
  .main-nav{
    position:fixed;inset:calc(var(--nav-h) + 1px) 0 0 0;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:8px 18px 96px;background:rgba(7,7,12,.98);
    overflow-y:auto;
  }
  .main-nav.open{display:flex;}
  .nav-link{padding:18px 4px;font-size:17px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-link::after{left:0;right:auto;width:40px;bottom:10px;}
  .nav-toggle{display:flex;}
  .nav-actions .btn-primary{display:none;}
  .brand-text{font-size:15px;}
  .crumb{padding-top:18px;}
  .crumb .now{max-width:180px;}
  .article-head{padding:26px 0 22px;}
  .cover img{aspect-ratio:16/9;}
  .article-body{font-size:16px;}
  .article-side{grid-template-columns:minmax(0,1fr);}
  .rel-card{grid-template-columns:minmax(0,1fr);}
  .rel-card img{width:100%;aspect-ratio:16/9;}
  .pn-grid{grid-template-columns:minmax(0,1fr);}
  .pn-card.next{text-align:left;}
  .section{padding:48px 0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);padding:48px 18px 32px;}
  .footer-bottom{padding:18px 18px 28px;}
}
@media (max-width:519px){
  .brand-text{max-width:120px;overflow:hidden;text-overflow:ellipsis;}
  .article-head h1{font-size:26px;}
  .empty-state{padding:40px 18px;}
}

/* roulang page: category1 */
:root{
  --bg-void:#07070C;
  --bg-deep:#0C0D16;
  --surface-1:#12131F;
  --surface-2:#1A1C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --nebula:#6E4BFF;
  --neon:#35E6FF;
  --pearl:#F4F1EA;
  --text:#EDEFF7;
  --muted:#9AA0BF;
  --dim:#6B7091;
  --ok:#3ED598;
  --warn:#F5A524;
  --danger:#FF5E6C;
  --r-card:18px;
  --r-img:14px;
  --r-tag:6px;
  --r-btn:999px;
  --r-input:12px;
  --shadow-card:0 0 0 1px rgba(255,255,255,.06),0 18px 40px rgba(0,0,0,.5);
  --shadow-hover:0 0 0 1px rgba(53,230,255,.28),0 18px 40px rgba(0,0,0,.55),0 0 26px rgba(53,230,255,.22);
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg-void);
  background-image:
    radial-gradient(600px 420px at 78% -8%, rgba(110,75,255,.14), transparent 70%),
    radial-gradient(520px 340px at 8% 6%, rgba(53,230,255,.09), transparent 72%),
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.02em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(53,230,255,.28);color:#fff}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.narrow{max-width:1120px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(10,11,18,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,var(--nebula),var(--neon),transparent);
  opacity:.7;
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:26px;height:26px;filter:drop-shadow(0 0 8px rgba(53,230,255,.45))}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:9px 14px;border-radius:var(--r-tag);
  font-size:15px;color:var(--muted);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--nebula),var(--neon));
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);border-radius:2px;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(.6);opacity:.7}
.nav-link.active{color:var(--text)}
.nav-link.active::after{transform:scaleX(1);box-shadow:0 0 8px rgba(53,230,255,.7)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line-strong);
  background:var(--surface-1);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);cursor:pointer;
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease);
}
.btn-primary{
  position:relative;color:var(--text);
  background:rgba(110,75,255,.18);
  border-color:rgba(53,230,255,.5);
  box-shadow:0 0 0 1px rgba(110,75,255,.24),0 10px 26px rgba(0,0,0,.42);
}
.btn-primary:hover{
  background:rgba(110,75,255,.32);
  border-color:var(--neon);
  box-shadow:0 0 0 1px rgba(53,230,255,.4),0 0 26px rgba(53,230,255,.3);
  transform:translateY(-2px);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(53,230,255,.5),0 0 12px rgba(53,230,255,.24)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--muted)}
.btn-ghost:hover{color:var(--text);border-color:var(--neon);box-shadow:0 0 18px rgba(53,230,255,.18)}
.btn-sm{height:36px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- shared bits ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-tag);
  background:rgba(53,230,255,.08);border:1px solid rgba(53,230,255,.28);
  font-size:13px;letter-spacing:.06em;color:var(--neon);
}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-tag);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  font-size:12.5px;color:var(--muted);letter-spacing:.02em;
}
.section{padding:96px 0}
.section-deep{background:var(--bg-deep);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:32px;font-weight:800}
.section-head p{color:var(--muted);font-size:15px;max-width:640px;margin-top:10px}
.grad-line{height:1px;background:linear-gradient(90deg,var(--nebula),var(--neon),transparent);border:0;margin:0}
.link-neon{color:var(--neon);border-bottom:1px solid rgba(53,230,255,.4);padding-bottom:2px}
.link-neon:hover{color:#fff;border-bottom-color:#fff}

/* ---------- breadcrumb ---------- */
.crumb{padding:18px 0 0;font-size:13.5px;color:var(--dim)}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li::after{content:"/";margin-left:8px;color:var(--dim);opacity:.6}
.crumb li:last-child::after{content:""}
.crumb a:hover{color:var(--neon)}

/* ---------- hero ---------- */
.cat-hero{position:relative;overflow:hidden;padding:56px 0 72px}
.hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:48px;align-items:center}
.cat-hero h1{font-size:clamp(32px,4.4vw,50px);font-weight:800;letter-spacing:-.02em;margin:20px 0 0}
.cat-hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--nebula),var(--neon));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{margin-top:20px;font-size:17px;color:var(--muted);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.hero-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  aspect-ratio:4/3;background:#12131F;box-shadow:var(--shadow-card);
}
.hero-media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,7,12,.05),rgba(7,7,12,.72));
}
.media-badge{
  position:absolute;left:16px;bottom:16px;z-index:2;
  display:flex;flex-direction:column;gap:2px;
  padding:12px 16px;border-radius:14px;
  background:rgba(12,13,22,.82);border:1px solid var(--line-strong);
}
.media-badge strong{font-size:20px;font-family:"Space Grotesk",Inter,system-ui,sans-serif}
.media-badge span{font-size:12.5px;color:var(--muted)}

/* ---------- guide layout ---------- */
.guide-layout{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:start}
.guide-main{min-width:0}

/* step timeline */
.steps{position:relative;display:flex;flex-direction:column;gap:0}
.step{position:relative;display:grid;grid-template-columns:56px 1fr;gap:24px;padding:26px 0}
.step + .step{border-top:1px solid var(--line)}
.step::before{
  content:"";position:absolute;left:27px;top:0;bottom:0;width:1px;
  background:linear-gradient(180deg,rgba(110,75,255,.5),rgba(53,230,255,.12),transparent);
}
.step:first-child::before{top:34px}
.step:last-child::before{bottom:auto;height:38px}
.step-num{
  position:relative;z-index:2;
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:"Space Grotesk",Inter,system-ui,sans-serif;
  font-size:17px;font-weight:700;color:var(--text);
  background:var(--surface-1);
  box-shadow:0 0 0 1px rgba(255,255,255,.08),inset 0 0 0 1px rgba(53,230,255,.16);
  transition:box-shadow .3s var(--ease),transform .3s var(--ease);
}
.step:hover .step-num{
  box-shadow:0 0 0 1px rgba(53,230,255,.6),0 0 26px rgba(53,230,255,.32);
  transform:translateY(-2px);
}
.step-body h3{font-size:21px;font-weight:700}
.step-body p{margin-top:10px;color:var(--muted);font-size:15.5px}
.step-note{
  margin-top:14px;padding:12px 16px;border-radius:var(--r-input);
  background:var(--surface-1);border-left:2px solid var(--neon);
  font-size:14px;color:var(--muted);
}
.step-note b{color:var(--text);font-weight:600}
.step-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* quick jump */
.quick-jump{
  position:sticky;top:96px;
  border-radius:var(--r-card);background:var(--surface-1);
  box-shadow:var(--shadow-card);padding:24px;
}
.quick-jump h3{font-size:15px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;font-weight:700}
.quick-jump ul{margin-top:16px;display:flex;flex-direction:column}
.quick-jump li + li{border-top:1px solid var(--line)}
.quick-jump a{
  display:flex;align-items:center;gap:10px;padding:12px 4px;font-size:14.5px;color:var(--muted);
  position:relative;
}
.quick-jump a span.i{font-family:"Space Grotesk",Inter,system-ui,sans-serif;font-size:12.5px;color:var(--dim);width:22px}
.quick-jump a:hover{color:var(--text)}
.quick-jump a:hover::before{
  content:"";position:absolute;left:-14px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--nebula),var(--neon));
}
.quick-jump .qj-foot{margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}

/* ---------- clip cards ---------- */
.clip-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.clip-head h3{font-size:22px;font-weight:700}
.clip-scroll{
  display:flex;gap:16px;overflow-x:auto;padding-bottom:10px;
  scroll-snap-type:x mandatory;-ms-overflow-style:none;scrollbar-width:none;
}
.clip-scroll::-webkit-scrollbar{display:none}
.clip-card{
  position:relative;flex:0 0 220px;aspect-ratio:9/16;border-radius:var(--r-card);
  overflow:hidden;background:#12131F;scroll-snap-align:start;
  box-shadow:var(--shadow-card);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.clip-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.clip-card img{width:100%;height:100%;object-fit:cover;border-radius:0}
.clip-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,7,12,.15) 0%,rgba(7,7,12,.05) 38%,rgba(7,7,12,.88) 100%);
}
.clip-tag{position:absolute;top:12px;left:12px;z-index:2;font-size:12px;padding:3px 9px;border-radius:var(--r-tag);background:rgba(110,75,255,.32);border:1px solid rgba(53,230,255,.35);color:var(--text)}
.clip-time{position:absolute;top:12px;right:12px;z-index:2;font-size:12px;color:var(--muted);background:rgba(7,7,12,.6);padding:3px 8px;border-radius:var(--r-tag)}
.clip-title{position:absolute;left:14px;right:14px;bottom:16px;z-index:2;font-size:14px;line-height:1.35;font-weight:600}

/* ---------- checklist cards ---------- */
.check-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px}
.check-card{
  border-radius:var(--r-card);background:var(--surface-1);padding:28px;
  box-shadow:var(--shadow-card);border-top:1px solid transparent;
  background-image:linear-gradient(var(--surface-1),var(--surface-1)),linear-gradient(90deg,var(--nebula),var(--neon));
  background-origin:border-box;background-clip:padding-box,border-box;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.check-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.check-card h3{font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px}
.check-card h3 .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(90deg,var(--nebula),var(--neon));box-shadow:0 0 12px rgba(53,230,255,.6)}
.check-card p{margin-top:12px;color:var(--muted);font-size:15px}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--muted);line-height:1.7}
.check-list li::before{content:"—";color:var(--neon);flex:0 0 auto}
.check-side{display:flex;flex-direction:column;gap:24px}
.stat-card{
  border-radius:var(--r-card);background:var(--surface-2);padding:24px;box-shadow:var(--shadow-card);
}
.stat-card .num{font-family:"Space Grotesk",Inter,system-ui,sans-serif;font-size:34px;font-weight:700;background:linear-gradient(90deg,var(--nebula),var(--neon));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-card .lbl{margin-top:6px;font-size:14px;color:var(--muted)}

/* ---------- faq ---------- */
.faq{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;color:var(--neon);transition:transform .3s var(--ease);line-height:1;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item[open] summary::before{
  content:"";position:absolute;left:-14px;top:16px;bottom:16px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--nebula),var(--neon));
}
.faq-item summary:hover{color:var(--neon)}
.faq-answer{padding:0 4px 26px;color:var(--muted);font-size:15.5px;max-width:820px}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.rel-card{
  border-radius:var(--r-card);background:var(--surface-1);padding:26px;box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.rel-card h3{font-size:19px;font-weight:700}
.rel-card p{color:var(--muted);font-size:14.5px}
.rel-card .rel-more{color:var(--neon);font-size:14px;margin-top:auto}

/* ---------- cta ---------- */
.cta-band{
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(26,28,43,.9),rgba(12,13,22,.95));
  border-top:1px solid transparent;
  background-image:linear-gradient(180deg,rgba(26,28,43,.92),rgba(12,13,22,.96)),linear-gradient(90deg,var(--nebula),var(--neon));
  background-origin:border-box;background-clip:padding-box,border-box;
  padding:40px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;font-weight:800}
.cta-band p{color:var(--muted);margin-top:8px;font-size:15px;max-width:560px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 24px 40px}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14.5px;max-width:320px}
.footer-col h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);font-weight:700}
.footer-col ul{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col p{color:var(--muted);font-size:14.5px}
.footer-col a:hover{color:var(--neon)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 24px 32px;border-top:1px solid var(--line);color:var(--dim);font-size:13.5px;
}

/* ---------- mobile bar ---------- */
.mobile-bar{
  position:fixed;left:12px;right:12px;bottom:12px;z-index:95;
  display:none;align-items:center;justify-content:center;
  height:56px;border-radius:var(--r-btn);
  background:rgba(12,13,22,.94);border:1px solid rgba(53,230,255,.4);
  box-shadow:0 0 26px rgba(53,230,255,.18);
  font-size:15px;font-weight:600;opacity:0;pointer-events:none;transition:opacity .35s var(--ease);
}
.mobile-bar.show{opacity:1;pointer-events:auto}

/* ---------- animation ---------- */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.fade-up.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .guide-layout{grid-template-columns:1fr 288px;gap:36px}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{aspect-ratio:16/10;max-width:640px}
  .guide-layout{grid-template-columns:1fr}
  .quick-jump{position:static;top:auto}
  .check-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-wrap{height:60px}
  .main-nav{
    position:fixed;inset:60px 0 0 0;flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:8px 18px 96px;background:rgba(7,7,12,.98);
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .28s var(--ease),transform .28s var(--ease);overflow-y:auto;
  }
  .main-nav.open{opacity:1;transform:none;pointer-events:auto}
  .main-nav .nav-link{padding:16px 4px;font-size:16px;border-bottom:1px solid var(--line)}
  .main-nav .nav-link::after{left:4px;right:auto;width:64px;bottom:6px}
  .nav-toggle{display:flex}
  .nav-actions .btn-sm{display:none}
  .cat-hero{padding:32px 0 48px}
  .section-head h2{font-size:26px}
  .section-head{margin-bottom:28px}
  .step{grid-template-columns:44px 1fr;gap:16px;padding:22px 0}
  .step-num{width:44px;height:44px;font-size:15px}
  .step::before{left:21px}
  .clip-card{flex:0 0 160px}
  .rel-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 18px 32px}
  .mobile-bar{display:flex}
  .quick-jump{padding:20px}
}
@media (max-width:479px){
  body{font-size:15.5px}
  .cat-hero h1{font-size:30px}
  .cta-band h2{font-size:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .fade-up{opacity:1!important;transform:none!important}
}

/* roulang page: category2 */
:root{
  --bg-void:#07070C;
  --bg-deep:#0C0D16;
  --surface-1:#12131F;
  --surface-2:#1A1C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --nebula:#6E4BFF;
  --neon:#35E6FF;
  --pearl:#F4F1EA;
  --text:#EDEFF7;
  --muted:#9AA0BF;
  --dim:#6B7091;
  --ok:#3ED598;
  --danger:#FF5E6C;
  --radius-card:18px;
  --radius-img:14px;
  --radius-tag:6px;
  --radius-input:12px;
  --shadow-card:0 0 0 1px rgba(255,255,255,.06),0 18px 40px rgba(0,0,0,.5);
  --shadow-hover:0 0 0 1px rgba(53,230,255,.28),0 18px 40px rgba(0,0,0,.55),0 0 26px rgba(53,230,255,.22);
  --ease:cubic-bezier(.22,1,.36,1);
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-void);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.026) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.026) 1px,transparent 1px);
  background-size:48px 48px;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.28;letter-spacing:-.02em}
p{margin:0}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* ============ 顶栏导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,11,18,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(110,75,255,.6),rgba(53,230,255,.65),transparent);
  opacity:.7;
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--header-h)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:16.5px;letter-spacing:-.01em;color:var(--text);white-space:nowrap}
.brand-mark{width:26px;height:26px;flex:0 0 auto}
.brand-text{background:linear-gradient(90deg,#FFFFFF 25%,#CFE7FF 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.main-nav{display:flex;align-items:center;gap:6px}
.nav-link{position:relative;padding:10px 14px;font-size:14.5px;color:var(--muted);border-radius:8px;transition:color .25s var(--ease)}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:2px;
  width:0;height:2px;
  transform:translateX(-50%);
  border-radius:2px;
  background:linear-gradient(90deg,var(--nebula),var(--neon));
  transition:width .28s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--text);font-weight:600}
.nav-link.active::after{width:calc(100% - 28px);box-shadow:0 0 10px rgba(53,230,255,.7)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
  position:relative;
  z-index:101;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;
  font-weight:600;
  font-size:14.5px;
  white-space:nowrap;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.btn-sm{height:34px;padding:0 16px;font-size:13.5px}
.btn-md{height:44px;padding:0 24px}
.btn-lg{height:52px;padding:0 32px;font-size:15.5px}
.btn-primary{
  color:var(--text);
  border:1px solid rgba(53,230,255,.42);
  background:linear-gradient(90deg,rgba(110,75,255,.32),rgba(53,230,255,.16));
  box-shadow:inset 0 0 0 1px rgba(110,75,255,.2);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(110,75,255,.28),0 0 26px rgba(53,230,255,.3)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 0 0 1px rgba(110,75,255,.3)}
.btn-ghost{color:var(--muted);border:1px solid var(--line-strong);background:rgba(255,255,255,.02)}
.btn-ghost:hover{color:var(--text);border-color:rgba(53,230,255,.48);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section-alt{background:var(--bg-deep);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:40px;flex-wrap:wrap}
.sec-title{position:relative;padding-left:16px;font-size:clamp(24px,2.6vw,33px)}
.sec-title::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:2px;background:linear-gradient(180deg,var(--nebula),var(--neon))}
.sec-desc{margin-top:12px;color:var(--muted);font-size:15px;max-width:680px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 12px;
  border-radius:var(--radius-tag);
  font-size:12.5px;letter-spacing:.1em;
  color:var(--neon);
  border:1px solid rgba(53,230,255,.32);
  background:rgba(53,230,255,.06);
}

/* ============ 内页首屏 ============ */
.page-hero{position:relative;padding:72px 0 80px;overflow:hidden}
.page-hero::before{
  content:"";
  position:absolute;
  top:-320px;left:-140px;
  width:640px;height:640px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(110,75,255,.16),transparent 62%);
  pointer-events:none;
}
.page-hero-grid{display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:center}
.page-hero h1{margin:20px 0 20px;font-size:clamp(30px,3.4vw,46px);line-height:1.2}
.page-hero .lead{color:var(--muted);font-size:16.5px;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero-tags li{
  height:30px;padding:0 14px;
  display:inline-flex;align-items:center;
  border-radius:var(--radius-tag);
  font-size:13px;
  color:var(--muted);
  background:var(--surface-1);
  border:1px solid var(--line);
}
.hero-media{
  margin:0;
  aspect-ratio:4/3;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:#12131F;
  box-shadow:var(--shadow-card);
  position:relative;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,7,12,0) 45%,rgba(7,7,12,.72) 100%);
  pointer-events:none;
}

/* ============ 情形—处置对照 ============ */
.compare{
  position:relative;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--surface-1);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.compare::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--nebula),var(--neon),transparent);
}
.compare-head{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:32px;
  padding:18px 32px;
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--dim);
}
.compare-row{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:32px;
  padding:28px 32px;
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease);
}
.compare-row:last-child{border-bottom:0}
.compare-row:hover{background:rgba(110,75,255,.07)}
.case-side h3{font-size:17px;margin-bottom:8px}
.case-side p{color:var(--muted);font-size:14.5px;line-height:1.75}
.fix-steps{counter-reset:fix}
.fix-steps li{
  position:relative;
  padding-left:38px;
  margin-bottom:10px;
  font-size:14.5px;
  color:var(--muted);
  line-height:1.75;
}
.fix-steps li:last-child{margin-bottom:0}
.fix-steps li::before{
  counter-increment:fix;
  content:counter(fix,decimal-leading-zero);
  position:absolute;left:0;top:1px;
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  background:linear-gradient(90deg,var(--nebula),var(--neon));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ============ 横向滚动卡 ============ */
.hscroll{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px 4px 18px;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.hscroll::-webkit-scrollbar{display:none}
.scard{
  flex:0 0 300px;
  scroll-snap-align:start;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--surface-1);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.scard:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.5);box-shadow:var(--shadow-hover)}
.scard-img{aspect-ratio:16/9;background:#12131F}
.scard-img img{width:100%;height:100%;object-fit:cover}
.scard-body{padding:18px 20px 22px}
.scard-body h3{font-size:16px;margin-bottom:8px}
.scard-body p{font-size:14px;color:var(--muted);line-height:1.7}
.scard .badge{
  display:inline-flex;align-items:center;
  height:22px;padding:0 9px;margin-bottom:12px;
  border-radius:var(--radius-tag);
  font-size:11.5px;letter-spacing:.06em;
  color:var(--neon);
  background:rgba(53,230,255,.08);
  border:1px solid rgba(53,230,255,.24);
}

/* ============ 编号清单 ============ */
.steps{border-top:1px solid var(--line)}
.step{
  position:relative;
  display:grid;
  grid-template-columns:88px 1fr;
  gap:24px;
  align-items:start;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  transition:padding .3s var(--ease);
}
.step::before{
  content:"";
  position:absolute;left:0;top:50%;
  width:2px;height:0;
  transform:translateY(-50%);
  border-radius:2px;
  background:linear-gradient(180deg,var(--nebula),var(--neon));
  transition:height .3s var(--ease);
}
.step:hover::before{height:58%}
.step:hover{padding-left:14px}
.step-num{
  font-family:"Inter","Space Grotesk",system-ui,sans-serif;
  font-size:26px;font-weight:800;line-height:1.2;
  background:linear-gradient(90deg,var(--nebula),var(--neon));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.step-body h3{font-size:17px;margin-bottom:8px}
.step-body p{color:var(--muted);font-size:14.5px}

/* ============ 提示条 ============ */
.notice{
  display:flex;align-items:flex-start;gap:14px;
  padding:20px 24px;
  margin-top:32px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  border-left:2px solid var(--neon);
  background:var(--surface-1);
  color:var(--muted);
  font-size:14.5px;
}
.notice strong{color:var(--text);font-weight:600}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:960px}
.faq-item{
  position:relative;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
  background:var(--surface-1);
  padding:0 22px;
  overflow:hidden;
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.faq-item::before{
  content:"";
  position:absolute;left:0;top:14px;bottom:14px;
  width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--nebula),var(--neon));
  opacity:0;
  transition:opacity .3s var(--ease);
}
.faq-item[open]::before{opacity:1}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:68px;
  padding:16px 0;
  font-size:16px;font-weight:600;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-sign{
  flex:0 0 auto;
  width:22px;height:22px;
  position:relative;
  transition:transform .3s var(--ease);
}
.faq-sign::before,.faq-sign::after{
  content:"";position:absolute;left:50%;top:50%;
  background:linear-gradient(90deg,var(--nebula),var(--neon));
  border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-sign::before{width:14px;height:2px}
.faq-sign::after{width:2px;height:14px}
.faq-item[open] .faq-sign{transform:rotate(45deg)}
.faq-answer{
  padding:0 0 24px;
  color:var(--muted);
  font-size:14.8px;
  line-height:1.85;
  border-top:1px solid var(--line);
  padding-top:18px;
  max-width:820px;
}

/* ============ 相关分类互链 ============ */
.links{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.link-card{
  display:block;
  padding:26px 24px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--surface-1);
  box-shadow:var(--shadow-card);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.link-card:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.5);box-shadow:var(--shadow-hover)}
.link-card .link-tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--radius-tag);
  font-size:11.5px;letter-spacing:.08em;
  color:var(--muted);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  margin-bottom:16px;
}
.link-card.is-current .link-tag{color:var(--neon);border-color:rgba(53,230,255,.32);background:rgba(53,230,255,.08)}
.link-card h3{font-size:17px;margin-bottom:10px}
.link-card p{color:var(--muted);font-size:14px;line-height:1.75}
.link-card .link-more{display:inline-block;margin-top:16px;font-size:13.5px;color:var(--neon)}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:44px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:linear-gradient(115deg,rgba(110,75,255,.16),rgba(12,13,22,.9) 62%);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--nebula),var(--neon),transparent);
}
.cta-band h2{font-size:clamp(21px,2.2vw,28px);margin-bottom:10px}
.cta-band p{color:var(--muted);font-size:15px;max-width:620px}

/* ============ 页脚 ============ */
.site-footer{margin-top:96px;background:var(--bg-deep);border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--dim);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a,.footer-col p{color:var(--muted);font-size:14px;line-height:1.75;transition:color .25s var(--ease)}
.footer-col a:hover{color:var(--neon)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding-top:20px;padding-bottom:28px;
  font-size:13px;color:var(--dim);
}

/* ============ 移动端一键直达 ============ */
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;
  height:56px;
  display:none;align-items:center;justify-content:center;
  background:rgba(10,11,18,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  z-index:90;
  transform:translateY(100%);
  transition:transform .35s var(--ease);
}
.mobile-cta.show{transform:translateY(0)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:1120px}
}
@media (max-width:1023px){
  :root{--header-h:60px}
  .section{padding:64px 0}
  .page-hero{padding:48px 0 56px}
  .page-hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-media{aspect-ratio:4/3}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    z-index:99;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:calc(var(--header-h) + 20px) 24px 40px;
    background:rgba(7,7,12,.98);
    transform:translateX(100%);
    transition:transform .35s var(--ease);
    overflow-y:auto;
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{
    padding:18px 4px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    border-radius:0;
    color:var(--text);
  }
  .main-nav .nav-link::after{left:4px;transform:none;bottom:0}
  .main-nav .nav-link:hover::after{width:60px}
  .main-nav .nav-link.active::after{width:80px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;gap:14px;padding:24px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px}
}
@media (max-width:767px){
  .section{padding:48px 0}
  .page-hero{padding:32px 0 44px}
  .page-hero h1{font-size:27px}
  .hero-media{aspect-ratio:4/3}
  .scard{flex:0 0 240px}
  .step{grid-template-columns:56px 1fr;gap:16px}
  .step-num{font-size:21px}
  .step:hover{padding-left:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band{padding:26px}
  .mobile-cta{display:flex}
  body{padding-bottom:0}
  .compare-row{padding:20px 18px}
  .faq-item{padding:0 18px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .brand{font-size:15px}
  .btn-md{height:42px;padding:0 18px}
  .btn-lg{height:46px;padding:0 22px}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
:root{
  --bg-void:#07070C;
  --bg-deep:#0C0D16;
  --surface-1:#12131F;
  --surface-2:#1A1C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --nebula:#6E4BFF;
  --neon:#35E6FF;
  --pearl:#F4F1EA;
  --text:#EDEFF7;
  --muted:#9AA0BF;
  --dim:#6B7091;
  --ok:#3ED598;
  --warn:#F5A524;
  --danger:#FF5E6C;
  --grad:linear-gradient(90deg,#6E4BFF 0%,#35E6FF 100%);
  --radius-card:18px;
  --radius-img:14px;
  --radius-tag:6px;
  --radius-input:12px;
  --shadow-card:0 0 0 1px rgba(255,255,255,.06),0 18px 40px rgba(0,0,0,.5);
  --shadow-glow:0 0 26px rgba(53,230,255,.22);
  --section-y:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg-void);
  background-image:radial-gradient(rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:34px 34px;
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;background:#12131F}
a{color:inherit;text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--neon);outline-offset:2px;border-radius:6px}
::selection{background:rgba(110,75,255,.45);color:#fff}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.narrow{max-width:1120px;margin:0 auto}
.text-body{max-width:760px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,11,18,.86);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--grad);opacity:.55}
.nav-wrap{display:flex;align-items:center;gap:36px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:30px;height:30px;flex:0 0 30px;filter:drop-shadow(0 0 8px rgba(53,230,255,.35))}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{position:relative;padding:6px 2px;font-size:15px;color:var(--muted);white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:50%;bottom:-2px;height:2px;width:0;transform:translateX(-50%);background:var(--grad);border-radius:2px;transition:width .28s ease}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:40%}
.nav-link.active{color:var(--text)}
.nav-link.active::after{width:100%;box-shadow:0 0 10px rgba(53,230,255,.55)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:12px}
.nav-toggle span{display:block;width:18px;height:2px;margin:0 auto;background:var(--text);border-radius:2px;transition:transform .28s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .25s ease,box-shadow .25s ease,background-color .25s ease,border-color .25s ease,color .25s ease;
}
.btn-primary{
  background:rgba(110,75,255,.18);
  border-color:rgba(110,75,255,.62);
  color:var(--text);
  box-shadow:0 0 0 1px rgba(53,230,255,.16) inset;
}
.btn-primary:hover{background:rgba(110,75,255,.3);border-color:var(--neon);box-shadow:var(--shadow-glow);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 12px rgba(53,230,255,.2)}
.btn-ghost{border-color:var(--line-strong);color:var(--muted)}
.btn-ghost:hover{color:var(--text);border-color:rgba(53,230,255,.55);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:50px;padding:0 32px;font-size:16px}

/* ---------- generic ---------- */
.section{padding:var(--section-y) 0}
.section-alt{background:var(--bg-deep)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--neon);
  padding:6px 14px;border:1px solid rgba(53,230,255,.3);border-radius:999px;
  background:rgba(53,230,255,.06);
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:44px;flex-wrap:wrap}
.section-title h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;line-height:1.3}
.section-title p{margin-top:12px;color:var(--muted);max-width:640px;font-size:16px}
.link-more{color:var(--neon);font-size:14px;border-bottom:1px solid rgba(53,230,255,.35);padding-bottom:2px}
.link-more:hover{border-color:var(--neon)}
.divider{height:1px;background:linear-gradient(90deg,rgba(255,255,255,.14),rgba(255,255,255,0))}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:76px 0 72px;border-bottom:1px solid var(--line)}
.hero::before{
  content:"";position:absolute;top:-220px;right:-120px;width:640px;height:640px;
  background:radial-gradient(circle,rgba(110,75,255,.16),transparent 65%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.14;pointer-events:none;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:center}
.hero h1{margin-top:20px;font-size:clamp(30px,4.2vw,50px);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{margin-top:20px;color:var(--muted);font-size:17px;max-width:600px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{font-size:13px;color:var(--muted);border:1px solid var(--line-strong);border-radius:var(--radius-tag);padding:6px 12px;background:rgba(255,255,255,.02)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-media{position:relative;border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow-card);background:#12131F}
.hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,7,12,.05) 40%,rgba(7,7,12,.72) 100%)}
.media-float{
  position:absolute;right:16px;bottom:16px;z-index:2;
  background:rgba(12,13,22,.88);border:1px solid var(--line-strong);
  border-radius:12px;padding:10px 14px;text-align:right;
}
.media-float b{display:block;font-size:18px;font-weight:700;letter-spacing:-.01em}
.media-float span{font-size:12px;color:var(--dim);letter-spacing:.06em}

/* ---------- accordion ---------- */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line);position:relative;transition:background-color .3s ease}
.acc-item::before{content:"";position:absolute;left:-18px;top:12px;bottom:12px;width:2px;background:var(--grad);opacity:0;border-radius:2px;transition:opacity .3s ease}
.acc-item.open::before{opacity:1}
.acc-btn{
  width:100%;min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
}
.acc-btn:hover{color:var(--neon)}
.acc-icon{position:relative;flex:0 0 20px;width:20px;height:20px;transition:transform .3s ease}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:var(--neon);border-radius:2px}
.acc-icon::before{left:0;top:9px;width:20px;height:2px}
.acc-icon::after{top:0;left:9px;width:2px;height:20px}
.acc-item.open .acc-icon{transform:rotate(45deg)}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .38s cubic-bezier(.22,1,.36,1)}
.acc-inner{padding:0 48px 26px 0;color:var(--muted);font-size:16px;line-height:1.85}
.acc-inner b{color:var(--text);font-weight:600}

/* ---------- steps ---------- */
.step-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.step-card{
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.step-card:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.6);box-shadow:var(--shadow-glow)}
.step-card img{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.82}
.step-body{padding:22px 24px 28px}
.step-num{
  font-size:13px;font-weight:700;letter-spacing:.16em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.step-body h3{margin-top:10px;font-size:20px;font-weight:700;letter-spacing:-.01em}
.step-body p{margin-top:10px;color:var(--muted);font-size:15.5px}

/* ---------- rail ---------- */
.rail{display:flex;gap:16px;overflow-x:auto;padding:4px 0 14px;scroll-snap-type:x mandatory;-ms-overflow-style:none;scrollbar-width:none}
.rail::-webkit-scrollbar{display:none}
.rail-card{
  position:relative;flex:0 0 220px;scroll-snap-align:start;
  border-radius:var(--radius-img);overflow:hidden;border:1px solid var(--line);background:#12131F;
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.rail-card:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.6);box-shadow:var(--shadow-glow)}
.rail-card img{width:100%;aspect-ratio:9/16;object-fit:cover}
.rail-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 38%,rgba(7,7,12,.9) 100%)}
.rail-tag{
  position:absolute;left:12px;top:12px;z-index:2;font-size:11px;color:var(--text);
  background:rgba(12,13,22,.82);border:1px solid var(--line-strong);border-radius:var(--radius-tag);padding:3px 8px;
}
.rail-title{position:absolute;left:14px;right:14px;bottom:16px;z-index:2;font-size:14px;line-height:1.4;font-weight:600}
.rail-dur{position:absolute;right:12px;top:12px;z-index:2;font-size:11px;color:var(--neon);background:rgba(12,13,22,.82);border:1px solid rgba(53,230,255,.28);border-radius:var(--radius-tag);padding:3px 8px}
.rail-hint{font-size:13px;color:var(--dim)}

/* ---------- prepare cards ---------- */
.prep-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:stretch}
.prep-card{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:28px 30px}
.prep-card h3{font-size:19px;font-weight:700}
.prep-card p{margin-top:12px;color:var(--muted);font-size:15.5px}
.prep-list{margin-top:18px;display:grid;gap:12px}
.prep-list li{position:relative;padding-left:18px;color:var(--muted);font-size:15.5px}
.prep-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;background:var(--grad);border-radius:2px}
.stat-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}
.stat-box{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:rgba(255,255,255,.02)}
.stat-box b{display:block;font-size:20px;font-weight:700;letter-spacing:-.01em}
.stat-box span{font-size:12.5px;color:var(--dim)}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:20px}
.rel-card{
  display:block;background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 26px 28px;transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease,background-color .3s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(53,230,255,.6);box-shadow:var(--shadow-glow);background:var(--surface-2)}
.rel-card .rel-idx{font-size:12px;letter-spacing:.18em;color:var(--dim)}
.rel-card h3{margin-top:12px;font-size:19px;font-weight:700}
.rel-card p{margin-top:10px;color:var(--muted);font-size:15px}
.rel-card .rel-go{display:inline-block;margin-top:16px;font-size:13.5px;color:var(--neon)}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:22px;
  background-image:linear-gradient(90deg,rgba(7,7,12,.94),rgba(12,13,22,.86)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  padding:46px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band::before{content:"";position:absolute;top:0;left:28px;right:28px;height:1px;background:var(--grad)}
.cta-band h2{font-size:clamp(22px,2.4vw,28px);font-weight:800;letter-spacing:-.02em}
.cta-band p{margin-top:10px;color:var(--muted);font-size:15.5px;max-width:620px}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:40px;padding:72px 0 44px}
.footer-brand p{margin-top:16px;color:var(--muted);font-size:15px;max-width:320px}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--dim);font-weight:700;text-transform:uppercase}
.footer-col ul{margin-top:18px;display:grid;gap:12px}
.footer-col a,.footer-col p{color:var(--muted);font-size:15px}
.footer-col a:hover{color:var(--neon)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:22px 0 34px;border-top:1px solid var(--line);
}
.footer-bottom p{color:var(--dim);font-size:13.5px}

/* ---------- mobile dock ---------- */
.mobile-dock{
  position:fixed;left:0;right:0;bottom:0;z-index:90;height:56px;
  display:none;align-items:center;justify-content:space-between;gap:12px;
  padding:0 18px;background:rgba(10,11,18,.94);
  border-top:1px solid rgba(53,230,255,.28);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .35s ease,transform .35s ease;
}
.mobile-dock.show{opacity:1;transform:none;pointer-events:auto}
.mobile-dock span{font-size:14px;color:var(--muted)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s cubic-bezier(.22,1,.36,1),transform .5s cubic-bezier(.22,1,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  :root{--section-y:80px}
  .nav-wrap{gap:24px}
  .main-nav{gap:20px}
}
@media (max-width:1023px){
  :root{--section-y:64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media img{aspect-ratio:16/10}
  .prep-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;left:0;right:0;top:60px;bottom:0;z-index:70;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    padding:12px 24px 100px;background:rgba(8,9,15,.98);
    overflow-y:auto;opacity:0;transform:translateY(-10px);pointer-events:none;
    transition:opacity .3s ease,transform .3s ease;
  }
  .main-nav.open{opacity:1;transform:none;pointer-events:auto}
  .nav-link{padding:18px 0;border-bottom:1px solid var(--line);font-size:17px}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--neon)}
  .nav-wrap{height:60px;gap:16px}
  .site-header .btn-sm{display:none}
  .hero{padding:52px 0 56px}
  .hero::after{opacity:.1}
  .step-grid{grid-template-columns:1fr}
  .cta-band{padding:34px 24px}
  .mobile-dock{display:flex}
  body{padding-bottom:70px}
}
@media (max-width:767px){
  .section-head{margin-bottom:32px}
  .acc-inner{padding-right:0}
  .rail-card{flex:0 0 160px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:52px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .stat-row{grid-template-columns:1fr 1fr}
}
@media (max-width:480px){
  .container{padding:0 18px}
  .hero h1{font-size:28px}
  .brand-text{font-size:15px}
  .btn-lg{height:46px;padding:0 24px;font-size:15px}
  .prep-card{padding:22px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}