/* roulang page: index */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,.045);
  --c-line:rgba(255,255,255,.10);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 18px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(22,224,163,.55),0 10px 30px rgba(22,224,163,.28);
  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;top:0;left:0;right:0;height:2px;z-index:200;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3}
p{margin:0}
::selection{background:rgba(22,224,163,.3)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1024px){.container{padding:0 40px}}
@media (min-width:1280px){:root{--container:1280px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-md);font-size:15px;font-weight:600;
  border:1px solid transparent;white-space:nowrap;cursor:pointer;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),filter var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-primary{background:var(--c-primary);color:var(--c-primary-ink);box-shadow:var(--shadow-glow)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(22,224,163,.7),0 14px 36px rgba(22,224,163,.36)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,.5),0 6px 16px rgba(22,224,163,.2)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--c-text)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(22,224,163,.4)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:var(--r-sm)}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--c-primary);transition:color var(--dur) var(--ease)}
.link-arrow svg{transition:transform var(--dur) var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- 徽章 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.6}
.badge-primary{background:rgba(22,224,163,.12);color:var(--c-primary)}
.badge-accent{background:rgba(255,176,32,.12);color:var(--c-accent)}
.meta-num{font-variant-numeric:tabular-nums}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;height:72px;display:flex;align-items:center;
  background:rgba(7,14,24,.55);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:height var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-compact{height:60px;background:rgba(7,14,24,.86);border-bottom-color:var(--c-line)}
.nav-inner{display:flex;align-items:center;gap:24px;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),#0B8F6A);
  color:var(--c-primary-ink);font-weight:800;font-size:15px;
  box-shadow:0 0 0 1px rgba(22,224,163,.5),0 6px 18px rgba(22,224,163,.25);
}
.brand-text{font-weight:800;font-size:15.5px;letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;padding:9px 12px;font-size:14.5px;color:var(--c-muted);border-radius:8px;transition:color var(--dur) var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease)}
.nav-link:hover{color:var(--c-text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-text)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.header-cta{margin-left:8px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:128px 0 64px;overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 82% 24%,rgba(22,224,163,.16),transparent 70%),
    radial-gradient(520px 380px at 8% 84%,rgba(255,176,32,.07),transparent 70%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr 1fr;gap:44px;align-items:center;min-height:520px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.08em;color:var(--c-primary);font-weight:600;margin-bottom:18px}
.hero-eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--c-primary)}
.hero h1{font-size:clamp(28px,5vw,44px);font-weight:800;letter-spacing:.01em;line-height:1.25}
.hero-sub{margin-top:20px;font-size:16px;color:var(--c-muted);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px;padding:20px 22px;
  border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.stat-num{font-size:23px;font-weight:800;color:var(--c-primary);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{font-size:12.5px;color:var(--c-muted);margin-top:4px;letter-spacing:.02em}
.hero-visual{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-card);min-height:400px}
.hero-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(7,14,24,.94) 0%,rgba(7,14,24,.5) 46%,rgba(7,14,24,.16) 100%)}
.hero-visual-card{
  position:absolute;left:22px;right:22px;bottom:22px;z-index:3;padding:18px 20px;border-radius:var(--r-md);
  background:rgba(255,255,255,.06);border:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.hv-title{font-size:15px;font-weight:700;margin-top:10px}
.hv-sub{font-size:13px;color:var(--c-muted);margin-top:4px}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;position:relative}
.section--soft{background:var(--c-bg-soft)}
.section--line{border-top:1px solid rgba(255,255,255,.06)}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:104px 0}}
.sec-head{max-width:700px;margin-bottom:40px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;max-width:none}
.sec-eyebrow{display:block;font-size:12px;letter-spacing:.14em;color:var(--c-primary);font-weight:700;text-transform:uppercase}
.sec-title{font-size:clamp(22px,3.4vw,32px);font-weight:700;margin-top:12px}
.sec-title::after{content:"";display:block;width:40px;height:3px;border-radius:2px;background:var(--c-primary);margin-top:14px}
.sec-desc{margin-top:16px;font-size:15.5px;color:var(--c-muted)}

/* ---------- 三要点 ---------- */
.pillar-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pillar{
  padding:30px 26px;border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.pillar:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.4)}
.pillar-num{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--c-accent);font-variant-numeric:tabular-nums}
.pillar h3{font-size:18px;font-weight:600;margin-top:14px}
.pillar p{margin-top:12px;font-size:14.5px;color:var(--c-muted)}

/* ---------- 故事 ---------- */
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.story-figure{border-radius:20px;overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-card);position:relative;aspect-ratio:4/3}
.story-figure img{width:100%;height:100%;object-fit:cover}
.story-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,14,24,.05),rgba(7,14,24,.55))}
.story-body p{color:var(--c-muted);font-size:15.5px;margin-top:18px}
.story-list{margin-top:26px;display:grid;gap:12px}
.story-list li{position:relative;padding-left:22px;font-size:14.5px;color:var(--c-text)}
.story-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:2px;border-radius:2px;background:var(--c-primary)}
.story-cta{margin-top:28px}

/* ---------- 精选拼图 ---------- */
.puzzle{display:grid;grid-template-columns:2fr 1fr;gap:22px}
.puzzle-side{display:grid;gap:22px}
.pcard{
  position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;background:var(--c-surface);
  border:1px solid var(--c-line);box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.pcard:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.4)}
.pcard-cover{position:relative;overflow:hidden;background:linear-gradient(140deg,#0B1726,#070E18)}
.pcard-main .pcard-cover{aspect-ratio:16/9}
.pcard-side .pcard-cover{aspect-ratio:16/9}
.pcard-cover img{width:100%;height:100%;object-fit:cover;transition:transform 220ms var(--ease)}
.pcard:hover .pcard-cover img{transform:scale(1.03)}
.pcard-body{padding:22px 24px 26px}
.pcard-main .pcard-body{padding:26px 28px 30px}
.pcard h3{font-size:18px;font-weight:600;margin-top:14px}
.pcard-main h3{font-size:22px}
.pcard p{margin-top:10px;font-size:14.5px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pcard-meta{display:flex;align-items:center;gap:14px;margin-top:16px;font-size:12.5px;color:var(--c-muted);font-variant-numeric:tabular-nums}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:2fr 1fr;gap:34px;align-items:start}
.news-list{display:grid;gap:18px}
.news-row{
  display:grid;grid-template-columns:168px 1fr;gap:20px;padding:16px;border-radius:var(--r-lg);
  background:var(--c-surface);border:1px solid var(--c-line);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.news-row:hover{transform:translateY(-3px);border-color:rgba(22,224,163,.4);background:rgba(255,255,255,.06)}
.news-thumb{display:block;border-radius:var(--r-md);overflow:hidden;background:linear-gradient(140deg,#0B1726,#070E18);aspect-ratio:16/10;align-self:start}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 220ms var(--ease)}
.news-row:hover .news-thumb img{transform:scale(1.03)}
.news-body{display:block;min-width:0}
.news-title{font-size:17px;font-weight:600;margin-top:10px;transition:color var(--dur) var(--ease)}
.news-row:hover .news-title{color:var(--c-primary)}
.news-summary{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-top:8px;font-size:14px;color:var(--c-muted);
}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:12px;font-size:12.5px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.meta-arrow{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:5px}
.news-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  min-height:240px;padding:32px;border-radius:var(--r-lg);
  background:var(--c-surface);border:1px dashed var(--c-line);text-align:center;color:var(--c-muted);
}
.news-empty-icon{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:rgba(22,224,163,.1);color:var(--c-primary)}
.news-side{display:grid;gap:22px;position:sticky;top:92px}
.side-card{
  padding:22px 22px 18px;border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.side-card h3{font-size:15.5px;font-weight:700;margin-bottom:12px}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.09);font-size:14px;color:var(--c-muted);transition:color var(--dur) var(--ease)}
.side-link:last-child{border-bottom:0;padding-bottom:4px}
.side-link:hover{color:var(--c-primary)}
.side-link span:last-child{font-variant-numeric:tabular-nums;font-size:12.5px}

/* ---------- 信任 ---------- */
.trust-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:44px}
.trust-chip{
  padding:18px 14px;border-radius:var(--r-md);text-align:center;font-size:13.5px;color:var(--c-muted);
  border:1px solid var(--c-line);background:rgba(255,255,255,.02);
  filter:grayscale(1);transition:filter var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.trust-chip:hover{filter:grayscale(0);color:var(--c-text);border-color:rgba(22,224,163,.35)}
.trust-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-card{padding:24px 22px;border-radius:var(--r-lg);border:1px solid var(--c-line);background:transparent}
.trust-card .stat-num{font-size:26px;color:var(--c-text)}
.trust-card .stat-num em{font-style:normal;font-size:14px;color:var(--c-primary);margin-left:4px}
.trust-card .stat-label{margin-top:6px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:820px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;position:relative;transition:border-color var(--dur) var(--ease);
}
.faq-item::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-primary);transform:scaleY(0);transform-origin:top;transition:transform 240ms ease-out}
.faq-item.is-open{border-color:rgba(22,224,163,.4)}
.faq-item.is-open::before{transform:scaleY(1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;line-height:1.5;
}
.faq-q:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}
.faq-icon{flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--c-primary);transition:transform 240ms ease-out}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;transform:translate(-50%,-50%)}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px;transition:opacity 200ms ease-out}
.faq-item.is-open .faq-icon{transform:rotate(90deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height 240ms ease-out,opacity 240ms ease-out}
.faq-item.is-open .faq-a{opacity:1}
.faq-a-inner{padding:0 24px 22px;font-size:14.5px;color:var(--c-muted)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:22px;padding:52px 32px;
  background:var(--c-bg-soft);border:1px solid var(--c-line);text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,3.4vw,30px);font-weight:700}
.cta-band p{margin-top:14px;color:var(--c-muted);font-size:15px}
.cta-form{display:flex;gap:12px;max-width:560px;margin:28px auto 0}
.cta-form input{
  flex:1;min-width:0;padding:14px 18px;border-radius:var(--r-md);
  background:rgba(0,0,0,.25);border:1px solid var(--c-line);color:var(--c-text);font-size:15px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.cta-form input::placeholder{color:rgba(147,166,189,.75)}
.cta-form input:focus{outline:0;border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(22,224,163,.16)}
.cta-form input.is-invalid{border-color:var(--c-danger);box-shadow:0 0 0 4px rgba(255,107,107,.14)}
.form-msg{min-height:20px;margin-top:12px;font-size:13px;color:var(--c-muted)}
.form-msg.is-error{color:var(--c-danger)}
.form-msg.is-ok{color:var(--c-primary)}
.cta-note{margin-top:8px;font-size:12.5px;color:var(--c-muted)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-bg-soft);border-top:1px solid var(--c-line);padding:60px 0 30px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--c-muted);max-width:320px}
.footer h4{font-size:14px;font-weight:700;color:var(--c-text);margin-bottom:16px;letter-spacing:.02em}
.footer-list li{margin-bottom:10px}
.footer-list a{font-size:14px;color:var(--c-muted);transition:color var(--dur) var(--ease)}
.footer-list a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:var(--c-muted);font-variant-numeric:tabular-nums;
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:130;display:none;
  background:rgba(11,23,38,.94);border-top:1px solid var(--c-line);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-inner{display:grid;grid-template-columns:repeat(5,1fr);height:60px}
.tab-item{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px;color:#8FA3BA;transition:color var(--dur) var(--ease)}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab-item.is-active{color:var(--c-primary)}
.tab-item.is-active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:28px;height:2px;border-radius:0 0 2px 2px;background:var(--c-primary);box-shadow:0 0 10px var(--c-primary)}
.tab-item:focus-visible{outline:2px solid var(--c-primary);outline-offset:-2px}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-grid{gap:36px}
}
@media (max-width:1023px){
  .nav-menu,.header-cta{display:none}
  .mobile-tab{display:block}
  body{padding-bottom:76px}
  .hero{padding:108px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:32px;min-height:0}
  .hero-visual{order:-1;min-height:260px}
  .story-grid{grid-template-columns:1fr;gap:36px}
  .news-grid{grid-template-columns:1fr;gap:28px}
  .news-side{position:static}
  .trust-wall{grid-template-columns:repeat(3,1fr)}
  .trust-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  .pillar-grid{grid-template-columns:1fr}
  .puzzle{grid-template-columns:1fr}
  .puzzle-side{grid-template-columns:1fr}
  .news-row{grid-template-columns:1fr}
  .news-thumb{aspect-ratio:16/9}
  .sec-head--row{flex-direction:column;align-items:flex-start}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:18px}
  .trust-wall{grid-template-columns:repeat(2,1fr)}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .cta-band{padding:40px 22px;border-radius:18px}
}
@media (max-width:575px){
  .brand-text{font-size:14px}
  .hero{padding:96px 0 48px}
  .trust-cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,.045);
  --c-line:rgba(255,255,255,.10);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset, 0 18px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(22,224,163,.55), 0 10px 30px rgba(22,224,163,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --pad-x:20px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--c-bg);
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:64px 64px;
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(22,224,163,.3)}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

.brand-line{position:fixed;top:0;left:0;right:0;height:2px;z-index:120;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));pointer-events:none}
.read-progress{position:fixed;top:2px;left:0;height:3px;width:0;z-index:130;background:linear-gradient(90deg,var(--c-primary),rgba(22,224,163,.55));box-shadow:0 0 12px rgba(22,224,163,.6);transition:width .12s linear}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--pad-x)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),filter .18s var(--ease);
}
.btn-primary{background:var(--c-primary);color:var(--c-primary-ink);box-shadow:var(--shadow-glow)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(22,224,163,.7),0 14px 34px rgba(22,224,163,.36)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,.5),0 6px 16px rgba(22,224,163,.22)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--c-text)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(22,224,163,.4);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12px;letter-spacing:.04em;font-weight:600;line-height:1.6}
.badge-primary{background:rgba(22,224,163,.12);color:var(--c-primary)}
.badge-accent{background:rgba(255,176,32,.12);color:var(--c-accent)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(7,14,24,.74);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:height .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.site-header.is-scrolled{height:60px;background:rgba(7,14,24,.9);border-bottom-color:var(--c-line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(22,224,163,.9),rgba(22,224,163,.45));
  color:var(--c-primary-ink);font-weight:800;font-size:17px;
  box-shadow:0 0 18px rgba(22,224,163,.35);
}
.brand-text{font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:9px 12px;font-size:14px;color:var(--c-muted);
  border-radius:8px;transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--c-text);background:rgba(255,255,255,.05)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-text)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{white-space:nowrap}

/* ---------- 移动端底部 Tab ---------- */
.tab-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:110;
  height:calc(62px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(11,23,38,.92);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--c-line);
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  position:relative;color:#8FA3BA;font-size:11px;letter-spacing:.02em;
  transition:color .18s var(--ease);
}
.tab-item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
  width:26px;height:2px;border-radius:2px;background:var(--c-primary);
  box-shadow:0 0 10px rgba(22,224,163,.8);transition:transform .22s var(--ease);
}
.tab-item svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.tab-item.is-active{color:var(--c-primary)}
.tab-item.is-active::before{transform:translateX(-50%) scaleX(1)}
.tab-item.is-active .tab-label{color:var(--c-text)}
.tab-label{line-height:1.2}

/* ---------- 面包屑 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);padding:26px 0 0}
.breadcrumb a{color:var(--c-muted);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--c-text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.post{padding:26px 0 0}
.post-head{max-width:860px;margin:0 auto;text-align:left}
.post-head h1{
  font-size:clamp(28px,5vw,44px);line-height:1.25;font-weight:800;letter-spacing:.01em;
  margin:16px 0 18px;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.24)}
.post-cover{margin:28px auto 0;max-width:960px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);background:linear-gradient(135deg,#0f1e30,#0b1726)}
.post-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s ease-out}
.post-cover:hover img{transform:scale(1.02)}

/* ---------- 正文排版 ---------- */
.article-content{
  max-width:800px;margin:44px auto 0;
  font-size:17px;line-height:1.9;color:var(--c-text);
  word-break:break-word;
}
.article-content > *:first-child{margin-top:0}
.article-content h2{
  font-size:clamp(22px,3.4vw,30px);line-height:1.3;font-weight:700;
  margin:2em 0 1em;position:relative;padding-bottom:14px;
}
.article-content h2::after{content:"";position:absolute;left:0;bottom:0;width:40px;height:3px;border-radius:3px;background:var(--c-primary)}
.article-content h3{font-size:19px;line-height:1.4;font-weight:600;margin:1.6em 0 .6em}
.article-content h4{font-size:16px;font-weight:600;margin:1.3em 0 .5em;color:var(--c-text)}
.article-content p{margin:0 0 1em}
.article-content a{color:var(--c-primary);border-bottom:1px solid rgba(22,224,163,.35);transition:border-color .18s var(--ease)}
.article-content a:hover{border-bottom-color:var(--c-primary)}
.article-content strong{font-weight:700;color:#fff}
.article-content blockquote{
  margin:1.6em 0;padding:20px 24px;border-left:3px solid var(--c-primary);border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:var(--c-surface);font-size:16px;color:#D6E3F5;
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.4em}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin:.4em 0;line-height:1.8}
.article-content li::marker{color:var(--c-primary)}
.article-content img{border-radius:14px;border:1px solid var(--c-line);margin:1.6em 0 .6em;width:100%;height:auto}
.article-content figcaption,.article-content .caption{font-size:13px;color:var(--c-muted);text-align:center;margin-bottom:1.4em}
.article-content table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-content th{background:var(--c-surface);text-align:left;font-weight:600}
.article-content th,.article-content td{padding:12px 14px;border-bottom:1px solid var(--c-line)}
.article-content tbody tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.article-content hr{border:0;height:1px;background:var(--c-line);margin:2.2em 0}
.article-content code{background:rgba(255,255,255,.07);padding:2px 6px;border-radius:6px;font-size:14px}
.article-content .table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1.6em 0}

.empty-state{
  text-align:center;padding:56px 24px;border:1px solid var(--c-line);border-radius:var(--r-card);
  background:var(--c-surface);max-width:560px;margin:0 auto;
}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--c-muted);font-size:15px;margin-bottom:22px}

/* ---------- 相关推荐 ---------- */
.related{padding:88px 0 0;border-top:1px solid rgba(255,255,255,.06);margin-top:76px}
.sec-title{font-size:clamp(22px,3.4vw,32px);line-height:1.3;font-weight:700;position:relative;padding-bottom:14px;margin-bottom:34px}
.sec-title::after{content:"";position:absolute;left:0;bottom:0;width:40px;height:3px;border-radius:3px;background:var(--c-primary)}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(22,224,163,.4);box-shadow:0 1px 0 rgba(255,255,255,.06) inset,0 22px 46px rgba(0,0,0,.5)}
.rel-cover{overflow:hidden;background:linear-gradient(135deg,#0f1e30,#0b1726)}
.rel-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s ease-out}
.rel-card:hover .rel-cover img{transform:scale(1.04)}
.rel-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px}
.rel-body h3{font-size:17px;font-weight:600;line-height:1.5}
.rel-body p{font-size:14px;color:var(--c-muted);line-height:1.7}
.rel-arrow{margin-top:auto;font-size:13px;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px}
.rel-arrow svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .18s var(--ease)}
.rel-card:hover .rel-arrow svg{transform:translateX(3px)}

.post-back{display:flex;justify-content:center;padding:56px 0 96px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--c-line);background:var(--c-bg-soft);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--c-muted);line-height:1.8;max-width:360px}
.footer-grid h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--c-text);letter-spacing:.02em}
.footer-list li{margin-bottom:10px}
.footer-list a{font-size:14px;color:var(--c-muted);transition:color .18s var(--ease),border-color .18s var(--ease);border-bottom:1px solid transparent}
.footer-list a:hover{color:var(--c-primary);border-bottom-color:rgba(22,224,163,.5)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.06);
  font-size:12.5px;color:var(--c-muted);font-variant-numeric:tabular-nums;
}

/* ---------- 图片加载兜底 ---------- */
img.is-broken{min-height:170px;background:linear-gradient(135deg,#132238,#0b1726);color:transparent}

@media (min-width:1280px){
  .container{max-width:1280px}
  :root{--pad-x:40px}
}
@media (min-width:1024px) and (max-width:1279px){
  :root{--pad-x:32px}
}
@media (max-width:1023px){
  .tab-bar{display:flex}
  body{padding-bottom:calc(62px + env(safe-area-inset-bottom))}
  .site-footer{padding-bottom:36px}
  :root{--pad-x:32px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
}
@media (max-width:900px){
  .header-cta{display:none}
}
@media (max-width:767px){
  :root{--pad-x:20px}
  .related{padding-top:64px;margin-top:56px}
  .rel-grid{grid-template-columns:1fr;gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .post-back{padding:40px 0 72px}
  .article-content{font-size:16px;margin-top:34px}
  .breadcrumb .current{max-width:60%}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .nav-inner{gap:12px}
  .brand-text{font-size:14px}
  .post-meta{gap:10px;font-size:12.5px}
  .rel-body{padding:18px 18px 20px}
  .btn{padding:13px 20px;width:100%}
  .post-back .btn{width:auto}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,0.045);
  --c-line:rgba(255,255,255,0.10);
  --c-line-soft:rgba(255,255,255,0.06);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,0.05) inset,0 18px 40px rgba(0,0,0,0.45);
  --shadow-btn:0 0 0 1px rgba(22,224,163,0.55),0 10px 30px rgba(22,224,163,0.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gutter:20px;
  --sec-pad:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  z-index:200;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease),border-color 180ms var(--ease),background-color 180ms var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:0.01em}
p{margin:0}
.num{font-variant-numeric:tabular-nums}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(7,14,24,0.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background-color 220ms var(--ease),border-color 220ms var(--ease);
}
.site-header.is-scrolled{
  background:rgba(7,14,24,0.88);
  border-bottom-color:var(--c-line-soft);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
  transition:min-height 220ms var(--ease);
}
.site-header.is-scrolled .nav-inner{min-height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(150deg,rgba(22,224,163,0.9),rgba(22,224,163,0.35));
  color:#04140F;
  font-weight:800;
  font-size:17px;
  box-shadow:0 0 18px rgba(22,224,163,0.35);
}
.brand-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:0.02em;
  white-space:nowrap;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--c-muted);
  border-radius:8px;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-primary);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms var(--ease);
}
.nav-link:hover{color:var(--c-text)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-text);font-weight:600}
.header-cta{margin-left:12px}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease),opacity 180ms var(--ease);
}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px}
.btn-primary{
  background:var(--c-primary);
  color:var(--c-primary-ink);
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(22,224,163,0.7),0 14px 34px rgba(22,224,163,0.36)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,0.5),0 4px 14px rgba(22,224,163,0.22)}
.btn-ghost{
  background:transparent;
  color:var(--c-text);
  border-color:rgba(255,255,255,0.18);
}
.btn-ghost:hover{background:rgba(255,255,255,0.08);border-color:rgba(22,224,163,0.4)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--c-primary);
  font-size:14.5px;
  font-weight:600;
}
.text-link svg{transition:transform 180ms var(--ease)}
.text-link:hover svg{transform:translateX(3px)}

/* ============ Badges ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  letter-spacing:0.04em;
  background:rgba(22,224,163,0.12);
  color:var(--c-primary);
  font-weight:600;
  white-space:nowrap;
}
.badge-gold{background:rgba(255,176,32,0.12);color:var(--c-accent)}
.meta{font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}

/* ============ Category Hero ============ */
.cat-hero{
  position:relative;
  min-height:380px;
  display:flex;
  align-items:center;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(7,14,24,0.94) 8%,rgba(7,14,24,0.72) 52%,rgba(7,14,24,0.52) 100%);
}
.cat-hero::after{
  content:"";
  position:absolute;
  right:-10%;top:-40%;
  width:620px;height:620px;
  background:radial-gradient(circle,rgba(22,224,163,0.20),rgba(22,224,163,0) 68%);
  pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:2;padding:64px 0;max-width:760px}
.page-title{
  font-size:clamp(28px,5vw,44px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:0.01em;
  margin:16px 0 14px;
}
.hero-sub{
  font-size:16px;
  line-height:1.8;
  color:#C6D4E6;
  max-width:620px;
}

/* ============ Breadcrumb ============ */
.breadcrumb-bar{border-bottom:1px solid var(--c-line-soft)}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding:14px 0;
  font-size:13px;
  color:var(--c-muted);
}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--c-text)}

/* ============ Section base ============ */
.section{padding:var(--sec-pad) 0}
.section-soft{background:var(--c-bg-soft)}
.section-line{border-top:1px solid var(--c-line-soft)}
.section-head{max-width:760px;margin-bottom:36px}
.section-title{
  font-size:clamp(22px,3.4vw,32px);
  line-height:1.3;
  font-weight:700;
  position:relative;
  padding-bottom:16px;
}
.section-title::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:40px;height:3px;
  border-radius:2px;
  background:var(--c-primary);
}
.section-desc{margin-top:16px;color:var(--c-muted);font-size:15px}

/* ============ Category layout: rail + list ============ */
.cat-layout{
  display:grid;
  grid-template-columns:264px 1fr;
  gap:28px;
  align-items:start;
}
.anchor-card{
  position:sticky;
  top:88px;
  padding:22px;
  border-radius:var(--r-card);
  background:var(--c-surface);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--c-line);
  box-shadow:var(--shadow-card);
}
.rail-title{
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--c-muted);
  font-weight:600;
  margin-bottom:14px;
}
.rail-list{display:flex;flex-direction:column;gap:4px}
.rail-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:10px;
  font-size:14.5px;
  color:#B7C6D9;
  border-left:2px solid transparent;
}
.rail-link .idx{
  font-size:12px;
  color:var(--c-muted);
  font-variant-numeric:tabular-nums;
}
.rail-link:hover{background:rgba(255,255,255,0.06);color:var(--c-text);border-left-color:rgba(22,224,163,0.55)}
.rail-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--c-line-soft);
  font-size:13px;
  line-height:1.7;
  color:var(--c-muted);
}

.entry-group + .entry-group{margin-top:44px}
.entry-group-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  margin-bottom:18px;
}
.entry-group-head h2{
  font-size:clamp(20px,2.6vw,26px);
  line-height:1.35;
  scroll-margin-top:96px;
}
.entry-group-head .meta{flex:0 0 auto}
.entry-list{display:flex;flex-direction:column;gap:16px}
.entry-card{
  display:grid;
  grid-template-columns:176px 1fr;
  gap:20px;
  padding:16px;
  border-radius:var(--r-card);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease);
}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:rgba(22,224,163,0.4);
  background:rgba(255,255,255,0.06);
}
.entry-thumb{
  position:relative;
  border-radius:var(--r-sm);
  overflow:hidden;
  aspect-ratio:16/10;
  background:linear-gradient(150deg,#0f2036,#0a1524);
  border:1px solid var(--c-line-soft);
}
.entry-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform 220ms var(--ease);
}
.entry-card:hover .entry-thumb img{transform:scale(1.03)}
.entry-thumb .thumb-tag{
  position:absolute;
  left:10px;top:10px;
  padding:3px 10px;
  border-radius:var(--r-pill);
  font-size:11.5px;
  letter-spacing:0.04em;
  background:rgba(7,14,24,0.72);
  color:var(--c-accent);
  border:1px solid rgba(255,176,32,0.35);
}
.entry-body{display:flex;flex-direction:column;gap:8px;min-width:0}
.entry-body h3{font-size:18px;line-height:1.45;font-weight:600}
.entry-desc{
  font-size:14.5px;
  line-height:1.75;
  color:var(--c-muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.entry-foot{
  display:flex;
  align-items:center;
  gap:14px;
  margin-top:auto;
  padding-top:6px;
  flex-wrap:wrap;
}
.entry-foot .text-link{margin-left:auto}

/* ============ Note grid ============ */
.note-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.note-card{
  padding:22px;
  border-radius:var(--r-card);
  border:1px solid var(--c-line);
  background:rgba(255,255,255,0.02);
  transition:border-color 200ms var(--ease),transform 200ms var(--ease);
}
.note-card:hover{border-color:rgba(22,224,163,0.35);transform:translateY(-3px)}
.note-num{
  font-size:22px;
  font-weight:800;
  color:rgba(22,224,163,0.75);
  font-variant-numeric:tabular-nums;
  letter-spacing:0.02em;
}
.note-card h3{font-size:16.5px;margin:10px 0 8px;font-weight:600}
.note-card p{font-size:14px;color:var(--c-muted);line-height:1.75}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:var(--r-card);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;
  transition:border-color 200ms var(--ease);
}
.faq-item.is-open{border-color:rgba(22,224,163,0.4)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  text-align:left;
  position:relative;
}
.faq-q::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--c-primary);
  transform:scaleY(0);
  transform-origin:top center;
  transition:transform 220ms ease-out;
}
.faq-item.is-open .faq-q::before{transform:scaleY(1)}
.faq-icon{
  flex:0 0 20px;
  width:20px;height:20px;
  position:relative;
  transition:transform 220ms ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--c-primary);
  border-radius:2px;
}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px;transition:transform 220ms ease-out}
.faq-icon::after{left:2px;top:9px;width:16px;height:2px}
.faq-item.is-open .faq-icon{transform:rotate(90deg)}
.faq-a{
  max-height:0;
  opacity:0;
  overflow:hidden;
  transition:max-height 240ms ease-out,opacity 240ms ease-out;
}
.faq-item.is-open .faq-a{max-height:340px;opacity:1}
.faq-a p{
  padding:0 22px 20px 25px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--c-muted);
}

/* ============ CTA band ============ */
.cta-band{
  position:relative;
  padding:52px 40px;
  border-radius:20px;
  background:var(--c-bg-soft);
  border:1px solid var(--c-line);
  overflow:hidden;
  text-align:center;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,0.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.035) 1px,transparent 1px);
  background-size:44px 44px;
  pointer-events:none;
  opacity:.7;
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:clamp(22px,3vw,30px);line-height:1.35;font-weight:700}
.cta-band p{margin:14px auto 26px;max-width:640px;font-size:15px;color:var(--c-muted)}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ============ Footer ============ */
.site-footer{
  background:#050B14;
  border-top:1px solid var(--c-line-soft);
  padding:56px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:var(--c-muted);
  max-width:340px;
}
.footer-grid h4{
  font-size:14px;
  font-weight:700;
  letter-spacing:0.04em;
  margin-bottom:16px;
  color:var(--c-text);
}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a{
  font-size:14px;
  color:var(--c-muted);
  text-decoration:underline;
  text-decoration-color:transparent;
  text-underline-offset:4px;
}
.footer-list a:hover{color:var(--c-primary);text-decoration-color:var(--c-primary)}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--c-line-soft);
  font-size:12.5px;
  color:var(--c-muted);
}

/* ============ Mobile tabbar ============ */
.mobile-tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:140;
  height:62px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(7,14,24,0.9);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--c-line);
}
.tab-item{
  position:relative;
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  font-size:11px;
  color:#8FA3BA;
  padding-top:6px;
}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8}
.tab-item::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  width:22px;height:2px;
  background:var(--c-primary);
  border-radius:2px;
  transform:translateX(-50%) scaleX(0);
  transition:transform 200ms var(--ease);
  box-shadow:0 0 10px rgba(22,224,163,0.7);
}
.tab-item.is-active{color:var(--c-primary);font-weight:600}
.tab-item.is-active::before{transform:translateX(-50%) scaleX(1)}

/* ============ Responsive ============ */
@media (min-width:576px){
  :root{--gutter:32px}
}
@media (min-width:768px){
  :root{--sec-pad:80px}
}
@media (min-width:1024px){
  :root{--gutter:40px;--sec-pad:104px}
  .mobile-tabbar{display:none}
}
@media (min-width:1280px){
  .container{max-width:1280px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .header-cta{display:none}
  .cat-layout{grid-template-columns:1fr}
  .anchor-card{position:static;top:auto}
  .rail-list{
    flex-direction:row;
    gap:10px;
    overflow-x:auto;
    padding-bottom:6px;
    scrollbar-width:thin;
  }
  .rail-list::-webkit-scrollbar{height:4px}
  .rail-list::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.16);border-radius:4px}
  .rail-link{
    flex:0 0 auto;
    border-left:0;
    border:1px solid var(--c-line);
    border-radius:var(--r-pill);
    padding:8px 14px;
  }
  .rail-note{display:none}
  .note-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .mobile-tabbar{display:flex}
  body{padding-bottom:70px}
  .site-footer{padding-bottom:34px}
}
@media (max-width:767px){
  .cat-hero{min-height:330px}
  .cat-hero-inner{padding:48px 0}
  .entry-card{grid-template-columns:1fr;gap:14px}
  .entry-thumb{aspect-ratio:16/9}
  .cta-band{padding:36px 20px;border-radius:16px}
  .cta-actions .btn{width:100%}
  .section-head{margin-bottom:26px}
}
@media (max-width:575px){
  .note-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .entry-body h3{font-size:16.5px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px 21px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:0.001ms !important;transition-duration:0.001ms !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,0.045);
  --c-line:rgba(255,255,255,0.10);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,0.05) inset,0 18px 40px rgba(0,0,0,0.45);
  --shadow-glow:0 0 0 1px rgba(22,224,163,0.55),0 10px 30px rgba(22,224,163,0.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --header-h:72px;
  --pad-sec:104px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:74px;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  z-index:80;
  pointer-events:none;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:rgba(22,224,163,.28);color:#fff;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  top:2px;left:0;right:0;
  z-index:70;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:rgba(7,14,24,0.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid rgba(255,255,255,0.06);
  transition:height 220ms var(--ease),background 220ms var(--ease),border-color 220ms var(--ease);
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(7,14,24,0.92);
  border-bottom-color:var(--c-line);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  width:100%;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px;
  background:linear-gradient(140deg,rgba(22,224,163,.9),rgba(22,224,163,.35));
  color:var(--c-primary-ink);
  font-weight:800;
  font-size:17px;
  letter-spacing:.02em;
  box-shadow:0 6px 18px rgba(22,224,163,.25);
}
.brand-text{
  font-size:16px;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--c-muted);
  border-radius:8px;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform 200ms var(--ease);
  border-radius:2px;
}
.nav-link:hover{color:var(--c-text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-text);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-cta{margin-left:10px;flex-shrink:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease),border-color 180ms var(--ease),color 180ms var(--ease),filter 180ms var(--ease);
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:var(--c-primary);
  color:var(--c-primary-ink);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(22,224,163,.6),0 16px 36px rgba(22,224,163,.34);}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,.5),0 6px 16px rgba(22,224,163,.22);}
.btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,0.18);
  color:var(--c-text);
}
.btn-ghost:hover{background:rgba(255,255,255,0.08);border-color:rgba(22,224,163,.4);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--c-primary);
  font-weight:600;
  font-size:14.5px;
}
.link-arrow i{transition:transform 180ms var(--ease);}
.link-arrow:hover i{transform:translateX(3px);}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  font-size:12px;
  letter-spacing:.04em;
  background:rgba(22,224,163,.12);
  color:var(--c-primary);
}
.badge-accent{background:rgba(255,176,32,.12);color:var(--c-accent);}
.meta{
  font-size:13px;
  color:var(--c-muted);
  font-variant-numeric:tabular-nums;
}

/* ---------- 分类页 Hero ---------- */
.cat-hero{
  position:relative;
  min-height:380px;
  display:flex;
  align-items:center;
  overflow:hidden;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  transform:scale(1.02);
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,14,24,.96) 12%,rgba(7,14,24,.68) 58%,rgba(7,14,24,.42) 100%);
}
.cat-hero .container{position:relative;z-index:2;padding-top:64px;padding-bottom:64px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.06em;
  color:var(--c-accent);
  background:rgba(255,176,32,.10);
  border:1px solid rgba(255,176,32,.22);
  border-radius:var(--r-pill);
  padding:5px 14px;
  margin-bottom:18px;
}
.hero-eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 10px var(--c-primary);}
.cat-hero h1{
  font-size:clamp(28px,5vw,44px);
  line-height:1.25;
  font-weight:800;
  letter-spacing:.01em;
  max-width:820px;
}
.hero-sub{
  margin-top:16px;
  max-width:660px;
  font-size:16px;
  line-height:1.85;
  color:rgba(234,242,255,.82);
}

/* ---------- 面包屑 ---------- */
.crumb-bar{border-bottom:1px solid rgba(255,255,255,0.06);background:var(--c-bg-soft);}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  padding:16px 0;
  font-size:13px;
  color:var(--c-muted);
}
.breadcrumb .sep{opacity:.45;}
.breadcrumb a{transition:color 180ms var(--ease);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .current{color:var(--c-text);}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  padding:44px 0 0;
}
.stat{
  border:1px solid var(--c-line);
  border-radius:var(--r-sm);
  padding:20px 22px;
  background:rgba(255,255,255,0.02);
  transition:border-color 200ms var(--ease),transform 200ms var(--ease);
}
.stat:hover{border-color:rgba(22,224,163,.34);transform:translateY(-3px);}
.stat strong{
  display:block;
  font-size:28px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  color:var(--c-text);
  letter-spacing:.01em;
}
.stat span{display:block;margin-top:4px;font-size:13px;color:var(--c-muted);}

/* ---------- 主体布局 ---------- */
.page-main{padding:var(--pad-sec) 0 0;}
.layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 336px;
  gap:40px;
  align-items:start;
}
.article-body{max-width:820px;}
.section + .section{margin-top:72px;}
.sec-title{
  font-size:clamp(22px,3.4vw,32px);
  line-height:1.3;
  font-weight:700;
  padding-top:0;
  scroll-margin-top:110px;
}
.sec-title::after{
  content:"";
  display:block;
  width:40px;height:3px;
  margin-top:14px;
  border-radius:2px;
  background:var(--c-primary);
}
.sec-body > p{
  margin-top:22px;
  font-size:16px;
  line-height:1.9;
  color:rgba(234,242,255,.86);
}
.lead{
  font-size:16.5px;
  line-height:1.9;
  color:rgba(234,242,255,.9);
  margin-top:22px;
}
.h3{
  font-size:19px;
  font-weight:600;
  line-height:1.4;
  margin-top:32px;
}
.content-list{margin-top:24px;display:grid;gap:16px;}
.content-list li{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:18px 20px;
  border:1px solid var(--c-line);
  border-radius:var(--r-sm);
  background:rgba(255,255,255,0.02);
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.content-list li:hover{border-color:rgba(22,224,163,.32);background:rgba(255,255,255,0.04);}
.content-list .num{
  flex:0 0 auto;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--c-primary);
  font-variant-numeric:tabular-nums;
  padding-top:2px;
}
.content-list strong{display:block;font-size:15.5px;font-weight:600;}
.content-list p{margin-top:4px;font-size:14.5px;line-height:1.75;color:var(--c-muted);}
.quote{
  margin-top:28px;
  padding:20px 24px;
  border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  border-right:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  font-size:16px;
  line-height:1.85;
  color:rgba(234,242,255,.9);
}
.figure{margin-top:28px;}
.figure img{
  width:100%;
  border-radius:14px;
  border:1px solid var(--c-line);
  background:linear-gradient(160deg,#0d1a2c,#08111d);
  aspect-ratio:16/9;
  object-fit:cover;
}
.figure figcaption{
  margin-top:12px;
  font-size:13px;
  text-align:center;
  color:var(--c-muted);
}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}

/* ---------- 侧栏目录卡 ---------- */
.side-col{position:sticky;top:104px;display:grid;gap:20px;}
.toc-card{
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px 22px;
  background:var(--c-surface);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
}
.toc-card h3{font-size:15px;font-weight:700;letter-spacing:.02em;}
.toc-list{margin-top:16px;display:grid;gap:10px;}
.toc-list a{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14px;
  color:var(--c-muted);
  padding:6px 0;
  border-bottom:1px dashed rgba(255,255,255,0.07);
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.toc-list li:last-child a{border-bottom:none;}
.toc-list a:hover{color:var(--c-primary);border-color:rgba(22,224,163,.35);}
.toc-list .idx{font-variant-numeric:tabular-nums;color:rgba(22,224,163,.7);font-size:12.5px;padding-top:1px;}
.toc-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--c-line);
  font-size:13px;
  line-height:1.7;
  color:var(--c-muted);
}
.toc-cta{margin-top:16px;width:100%;}

/* ---------- 页内 CTA ---------- */
.cta-band{
  margin-top:var(--pad-sec);
  padding:72px 0;
  background:var(--c-bg-soft);
  border-top:1px solid rgba(255,255,255,0.06);
  border-bottom:1px solid rgba(255,255,255,0.06);
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.7;
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:720px;margin:0 auto;}
.cta-inner h2{font-size:clamp(22px,3.4vw,30px);font-weight:700;line-height:1.35;}
.cta-inner p{margin-top:16px;font-size:15.5px;line-height:1.85;color:var(--c-muted);}
.cta-actions{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:0;
  padding-top:64px;
  border-top:1px solid rgba(255,255,255,0.08);
  background:var(--c-bg);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:36px;
  padding-bottom:48px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:var(--c-muted);
  max-width:320px;
}
.site-footer h4{
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--c-text);
  margin-bottom:16px;
}
.footer-list{display:grid;gap:10px;}
.footer-list a{
  font-size:14px;
  color:var(--c-muted);
  transition:color 180ms var(--ease);
}
.footer-list a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,0.06);
  font-size:12.5px;
  color:var(--c-muted);
  font-variant-numeric:tabular-nums;
}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tab{display:none;}
.mobile-tab .tab-item{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:11px;
  color:#8FA3BA;
  padding:8px 2px 6px;
  position:relative;
  transition:color 180ms var(--ease);
}
.mobile-tab .tab-item i{font-size:16px;}
.mobile-tab .tab-item::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  width:26px;height:2px;
  border-radius:2px;
  transform:translateX(-50%) scaleX(0);
  background:var(--c-primary);
  box-shadow:0 0 10px rgba(22,224,163,.8);
  transition:transform 200ms var(--ease);
}
.mobile-tab .tab-item.is-active{color:var(--c-primary);}
.mobile-tab .tab-item.is-active::before{transform:translateX(-50%) scaleX(1);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1140px;}
}
@media (max-width:1023px){
  :root{--pad-sec:80px;}
  .nav-menu{display:none;}
  .header-cta{margin-left:auto;}
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .side-col{position:static;order:-1;}
  .article-body{max-width:100%;}
  .mobile-tab{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:75;
    height:62px;
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(11,23,38,0.94);
    backdrop-filter:blur(14px) saturate(120%);
    -webkit-backdrop-filter:blur(14px) saturate(120%);
    border-top:1px solid var(--c-line);
  }
  body{padding-bottom:78px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  :root{--pad-sec:64px;}
  body{padding-top:66px;font-size:15.5px;}
  .site-header{height:60px;}
  .site-header.is-scrolled{height:56px;}
  .brand-text{font-size:14.5px;}
  .cat-hero{min-height:320px;}
  .cat-hero .container{padding-top:48px;padding-bottom:48px;}
  .header-cta{display:none;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .cta-band{padding:56px 0;}
  .section + .section{margin-top:56px;}
}
@media (max-width:575px){
  :root{--pad-sec:56px;}
  .container{padding:0 18px;}
  .footer-grid{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:1fr;gap:14px;}
  .cta-actions .btn{width:100%;}
  .mobile-tab .tab-item span{font-size:10px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category3 */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,.045);
  --c-line:rgba(255,255,255,.10);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 18px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(22,224,163,.55),0 10px 30px rgba(22,224,163,.28);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:200ms;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:15px;
  line-height:1.8;
  letter-spacing:.005em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  z-index:200;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--c-primary);}
h1,h2,h3,h4{margin:0;line-height:1.3;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}
section.block{
  padding:64px 0;
  border-bottom:1px solid rgba(255,255,255,.06);
}
section.block.alt{background:var(--c-bg-soft);}
.sec-head{max-width:760px;margin-bottom:36px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
h2.sec-title{
  font-size:clamp(22px,3.4vw,32px);
  font-weight:700;
  letter-spacing:.01em;
}
h2.sec-title::after{
  content:"";
  display:block;
  width:40px;height:3px;
  margin-top:14px;
  border-radius:2px;
  background:var(--c-primary);
}
.sec-head.center h2.sec-title::after{margin-left:auto;margin-right:auto;}
.sec-desc{color:var(--c-muted);font-size:15px;margin-top:14px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--c-accent);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:18px;height:1px;
  background:var(--c-accent);
  display:block;
}
.badge{
  display:inline-block;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  font-size:12px;
  letter-spacing:.04em;
  background:rgba(22,224,163,.12);
  color:var(--c-primary);
  line-height:1.6;
}
.badge.amber{background:rgba(255,176,32,.12);color:var(--c-accent);}
.meta{
  font-size:13px;
  color:var(--c-muted);
  font-variant-numeric:tabular-nums;
}

/* buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--radius-md);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),filter var(--dur) var(--ease);
}
.btn-primary{
  background:var(--c-primary);
  color:var(--c-primary-ink);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  color:var(--c-primary-ink);
  filter:brightness(1.08);
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(22,224,163,.7),0 14px 34px rgba(22,224,163,.36);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,.5),0 6px 16px rgba(22,224,163,.22);}
.btn-ghost{
  background:transparent;
  color:var(--c-text);
  border:1px solid rgba(255,255,255,.18);
}
.btn-ghost:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(22,224,163,.4);
  color:var(--c-text);
  transform:translateY(-1px);
}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--c-primary);
  font-weight:600;
}
.link-arrow svg{transition:transform var(--dur) var(--ease);}
.link-arrow:hover svg{transform:translateX(3px);}

/* header */
.site-header{
  position:sticky;
  top:2px;
  z-index:120;
  height:72px;
  display:flex;
  align-items:center;
  background:rgba(7,14,24,.72);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:height var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(7,14,24,.9);
  border-bottom-color:var(--c-line);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;
  border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(22,224,163,.9),rgba(22,224,163,.35));
  color:var(--c-primary-ink);
  font-weight:800;
  font-size:18px;
  box-shadow:0 0 18px rgba(22,224,163,.35);
}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--c-text);
  white-space:nowrap;
}
.nav-menu{display:none;align-items:center;gap:4px;}
.nav-link{
  position:relative;
  padding:10px 12px;
  font-size:14.5px;
  color:var(--c-muted);
  border-radius:8px;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--c-text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--c-text);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-cta{display:none;}

/* hero */
.page-hero{
  position:relative;
  min-height:360px;
  display:flex;
  align-items:flex-end;
  padding:72px 0 52px;
  background-image:linear-gradient(90deg,rgba(7,14,24,.94),rgba(7,14,24,.7) 60%,rgba(7,14,24,.86)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  top:-120px;right:-80px;
  width:420px;height:420px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(22,224,163,.22),rgba(22,224,163,0) 68%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.page-hero h1{
  font-size:clamp(28px,5vw,44px);
  font-weight:800;
  letter-spacing:.01em;
  line-height:1.25;
  max-width:820px;
  margin:16px 0 16px;
}
.page-hero .lead{
  max-width:680px;
  color:var(--c-muted);
  font-size:16px;
  margin:0;
}
.crumb-bar{
  background:rgba(255,255,255,.02);
  border-bottom:1px solid rgba(255,255,255,.06);
  padding:14px 0;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-muted);
  flex-wrap:wrap;
}
.breadcrumb .sep{color:rgba(255,255,255,.25);}
.breadcrumb .is-current{color:var(--c-text);}

/* stat strip */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}
.stat-card{
  border:1px solid var(--c-line);
  border-radius:var(--radius-lg);
  padding:22px 20px;
  background:transparent;
}
.stat-num{
  font-size:28px;
  font-weight:800;
  color:var(--c-primary);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stat-label{
  margin-top:6px;
  font-size:13px;
  color:var(--c-muted);
}
.note-list{
  margin-top:28px;
  display:grid;
  gap:14px;
}
.note-item{
  display:flex;
  gap:14px;
  align-items:flex-start;
  padding:18px 20px;
  border-radius:var(--radius-md);
  background:rgba(255,255,255,.025);
  border:1px solid rgba(255,255,255,.06);
}
.note-idx{
  flex:0 0 auto;
  font-size:13px;
  font-variant-numeric:tabular-nums;
  color:var(--c-accent);
  border:1px solid rgba(255,176,32,.35);
  border-radius:var(--radius-pill);
  padding:1px 10px;
  line-height:1.6;
}
.note-item h3{font-size:17px;font-weight:600;margin-bottom:4px;}
.note-item p{font-size:14.5px;color:var(--c-muted);}

/* card grid */
.card-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
}
.set-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--radius-lg);
  border:1px solid var(--c-line);
  background:var(--c-surface);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.set-card:hover{
  transform:translateY(-4px);
  border-color:rgba(22,224,163,.4);
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,#0d1c2c,#0a1420);
  overflow:hidden;
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform 220ms var(--ease);
}
.set-card:hover .card-media img{transform:scale(1.03);}
.card-media .badge{
  position:absolute;
  left:14px;top:14px;
  backdrop-filter:blur(6px);
}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:19px;font-weight:600;}
.card-body p{font-size:14.5px;color:var(--c-muted);margin:0;}
.card-foot{
  margin-top:auto;
  padding-top:14px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid rgba(255,255,255,.07);
}

/* checklist */
.check-wrap{
  display:grid;
  gap:18px;
}
.check-group{
  border:1px solid var(--c-line);
  border-radius:var(--radius-lg);
  padding:24px 24px 12px;
  background:rgba(255,255,255,.02);
}
.check-group h3{
  font-size:17px;
  font-weight:600;
  margin-bottom:14px;
  display:flex;align-items:center;gap:10px;
}
.check-group h3 span{
  font-size:13px;
  color:var(--c-accent);
  font-variant-numeric:tabular-nums;
}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:12px 0;
  border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:14.5px;
  color:var(--c-muted);
}
.check-list li:last-child{border-bottom:0;}
.check-list li strong{color:var(--c-text);font-weight:600;}
.tick{
  flex:0 0 auto;
  width:18px;height:18px;
  margin-top:4px;
  border-radius:50%;
  border:1px solid rgba(22,224,163,.5);
  position:relative;
}
.tick::after{
  content:"";
  position:absolute;
  left:5px;top:2px;
  width:5px;height:9px;
  border-right:2px solid var(--c-primary);
  border-bottom:2px solid var(--c-primary);
  transform:rotate(40deg);
}

/* faq */
.faq-list{
  max-width:820px;
  margin:0 auto;
  display:grid;
  gap:14px;
}
.faq-item{
  border:1px solid var(--c-line);
  border-radius:var(--radius-lg);
  background:var(--c-surface);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  position:relative;
  transition:border-color var(--dur) var(--ease);
}
.faq-item::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:3px;
  background:var(--c-primary);
  opacity:0;
  transition:opacity var(--dur) var(--ease);
}
.faq-item.is-open{border-color:rgba(22,224,163,.35);}
.faq-item.is-open::before{opacity:1;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 22px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
}
.faq-q .sign{
  flex:0 0 auto;
  width:22px;height:22px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.22);
  position:relative;
  transition:transform 240ms ease-out,border-color var(--dur) var(--ease);
}
.faq-q .sign::before,
.faq-q .sign::after{
  content:"";
  position:absolute;
  background:var(--c-primary);
  left:50%;top:50%;
}
.faq-q .sign::before{width:10px;height:1.5px;transform:translate(-50%,-50%);}
.faq-q .sign::after{width:1.5px;height:10px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-q .sign{transform:rotate(90deg);border-color:rgba(22,224,163,.55);}
.faq-a{
  max-height:0;
  opacity:0;
  overflow:hidden;
  transition:max-height 240ms ease-out,opacity 240ms ease-out;
}
.faq-item.is-open .faq-a{opacity:1;}
.faq-a-inner{
  padding:0 22px 22px;
  color:var(--c-muted);
  font-size:15px;
  line-height:1.85;
}

/* cta */
.cta-card{
  position:relative;
  border-radius:var(--radius-lg);
  border:1px solid var(--c-line);
  background:var(--c-bg-soft);
  padding:44px 26px;
  text-align:center;
  overflow:hidden;
}
.cta-card::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:36px 36px;
  opacity:.5;
  pointer-events:none;
}
.cta-card > *{position:relative;z-index:2;}
.cta-card h2{
  font-size:clamp(21px,3vw,28px);
  font-weight:700;
  margin-bottom:14px;
}
.cta-card p{
  max-width:620px;
  margin:0 auto 26px;
  color:var(--c-muted);
  font-size:15px;
}
.cta-actions{
  display:flex;
  flex-direction:column;
  gap:12px;
  align-items:stretch;
  max-width:420px;
  margin:0 auto;
}

/* footer */
.site-footer{
  margin-top:0;
  padding:56px 0 32px;
  background:var(--c-bg);
  border-top:1px solid var(--c-line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
.footer-brand p{
  margin-top:16px;
  color:var(--c-muted);
  font-size:14px;
  max-width:360px;
}
.site-footer h4{
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
  color:var(--c-text);
}
.footer-list li{margin-bottom:10px;}
.footer-list a{
  font-size:14px;
  color:var(--c-muted);
  text-decoration:underline;
  text-decoration-color:transparent;
  text-underline-offset:4px;
  transition:text-decoration-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.footer-list a:hover{color:var(--c-primary);text-decoration-color:var(--c-primary);}
.footer-bottom{
  margin-top:38px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.07);
  display:flex;
  flex-direction:column;
  gap:8px;
  font-size:12.5px;
  color:var(--c-muted);
}

/* mobile tab */
.tabbar{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:130;
  display:grid;
  grid-template-columns:repeat(5,1fr);
  background:rgba(11,23,38,.92);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--c-line);
  padding-bottom:env(safe-area-inset-bottom,0);
}
.tab-item{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
  height:58px;
  font-size:11px;
  color:#8FA3BA;
  transition:color var(--dur) var(--ease);
}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.tab-item::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  transform:translateX(-50%);
  width:0;height:2px;
  border-radius:2px;
  background:var(--c-primary);
  box-shadow:0 0 10px rgba(22,224,163,.7);
  transition:width var(--dur) var(--ease);
}
.tab-item.is-active{color:var(--c-primary);}
.tab-item.is-active::before{width:26px;}

@media (min-width:576px){
  .container{padding:0 32px;}
  .stat-strip{grid-template-columns:repeat(4,1fr);}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .cta-actions{flex-direction:row;justify-content:center;max-width:none;}
  .footer-bottom{flex-direction:row;justify-content:space-between;align-items:center;}
}
@media (min-width:768px){
  body{font-size:15.5px;}
  section.block{padding:80px 0;}
  .page-hero{min-height:400px;padding:88px 0 60px;}
  .check-wrap{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:1024px){
  section.block{padding:104px 0;}
  .nav-menu{display:flex;}
  .header-cta{display:inline-flex;}
  .tabbar{display:none;}
  .card-grid{grid-template-columns:repeat(3,1fr);}
  .set-card.wide{grid-column:span 2;flex-direction:row;}
  .set-card.wide .card-media{flex:0 0 46%;aspect-ratio:auto;min-height:220px;}
  .set-card.wide .card-body{justify-content:center;}
  .site-footer{padding:64px 0 36px;}
}
@media (min-width:1280px){
  :root{--container:1280px;}
  .container{padding:0 40px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:1ms !important;animation-duration:1ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --c-bg:#070E18;
  --c-bg-soft:#0B1726;
  --c-surface:rgba(255,255,255,.045);
  --c-line:rgba(255,255,255,.10);
  --c-primary:#16E0A3;
  --c-primary-ink:#04140F;
  --c-accent:#FFB020;
  --c-text:#EAF2FF;
  --c-muted:#93A6BD;
  --c-danger:#FF6B6B;
  --radius:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 18px 40px rgba(0,0,0,.45);
  --glow-primary:0 0 0 1px rgba(22,224,163,.55),0 10px 30px rgba(22,224,163,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:72px 72px;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.top-line{position:fixed;top:0;left:0;right:0;height:2px;z-index:200;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1024px){.container{padding:0 40px}}
@media (min-width:1280px){.container{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(7,14,24,.72);
  border-bottom:1px solid transparent;
  transition:height .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.is-scrolled{
  height:60px;
  background:rgba(11,23,38,.78);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom-color:var(--c-line);
}
.nav-inner{display:flex;align-items:center;gap:20px;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;font-weight:800;letter-spacing:.01em}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(22,224,163,.9),rgba(22,224,163,.35));
  color:var(--c-primary-ink);font-size:17px;font-weight:900;
  box-shadow:0 0 0 1px rgba(22,224,163,.45),0 8px 22px rgba(22,224,163,.22);
}
.brand-text{font-size:16px;color:var(--c-text);white-space:nowrap}
.brand:hover .brand-text{color:#fff}
.nav-menu{display:none;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;color:var(--c-muted);padding:6px 0;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--c-text)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--c-text);font-weight:600}
.header-cta{display:none}
@media (min-width:1024px){
  .nav-menu{display:flex}
  .header-cta{display:inline-flex;margin-left:4px}
}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);border:1px solid transparent;
  padding:14px 28px;font-size:15px;font-weight:700;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),opacity .18s var(--ease);
}
.btn-primary{
  background:var(--c-primary);color:var(--c-primary-ink);
  box-shadow:var(--glow-primary);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(22,224,163,.5),0 4px 12px rgba(22,224,163,.2)}
.btn-ghost{
  background:transparent;color:var(--c-text);border-color:rgba(255,255,255,.18);
}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(22,224,163,.4)}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);font-weight:600;font-size:15px}
.text-link svg{transition:transform .18s var(--ease)}
.text-link:hover svg{transform:translateX(3px)}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;min-height:380px;display:flex;align-items:center}
.page-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  filter:saturate(.9);
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,14,24,.95) 0%,rgba(7,14,24,.78) 46%,rgba(7,14,24,.52) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding-top:64px;padding-bottom:64px;max-width:760px}
.page-hero h1{
  font-size:clamp(28px,5vw,44px);line-height:1.25;font-weight:800;letter-spacing:.01em;margin-bottom:16px;
}
.page-hero-sub{color:var(--c-muted);font-size:16px;line-height:1.8;max-width:640px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-pill);
  background:rgba(22,224,163,.12);color:var(--c-primary);font-size:12px;letter-spacing:.04em;font-weight:700;margin-bottom:18px;
}
@media (max-width:575px){
  .page-hero{min-height:auto}
  .page-hero-inner{padding-top:48px;padding-bottom:48px}
}
/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-muted);padding:20px 0 0;
}
.breadcrumb a{color:var(--c-muted);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--c-text)}
/* ---------- sections ---------- */
.section{padding:64px 0}
.section-alt{background:var(--c-bg-soft)}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(22px,3.4vw,32px);line-height:1.3;font-weight:700;position:relative;padding-bottom:16px;margin-bottom:16px;
}
.section-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:40px;height:3px;border-radius:3px;background:var(--c-primary);
}
.section-head p{color:var(--c-muted);font-size:15px;line-height:1.85}
.eyebrow{font-size:12px;letter-spacing:.04em;color:var(--c-accent);font-weight:700;margin-bottom:12px;display:block}

/* ---------- timeline ---------- */
.timeline{margin-top:8px}
.tl-item{position:relative;display:grid;grid-template-columns:56px 1fr;gap:20px;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:27px;top:58px;bottom:6px;width:1px;background:var(--c-line);
}
.tl-item:last-child::before{display:none}
.tl-num{
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--c-line);background:rgba(22,224,163,.07);
  color:var(--c-primary);font-weight:800;font-size:17px;letter-spacing:.02em;
}
.tl-body{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  padding:22px 24px;transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.tl-body:hover{border-color:rgba(22,224,163,.4);transform:translateY(-2px)}
.tl-body h3{font-size:18px;font-weight:600;margin-bottom:8px}
.tl-body p{color:var(--c-muted);font-size:15px;line-height:1.8}
.tl-meta{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:13px;color:var(--c-accent)}
@media (max-width:575px){
  .tl-item{grid-template-columns:44px 1fr;gap:14px}
  .tl-num{width:44px;height:44px;font-size:15px}
  .tl-item::before{left:21px;top:46px}
  .tl-body{padding:18px}
}

/* ---------- data table ---------- */
.table-wrap{
  border:1px solid var(--c-line);border-radius:var(--radius);background:rgba(0,0,0,.28);
  overflow:hidden;box-shadow:var(--shadow-card);
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.data-table{width:100%;min-width:720px;border-collapse:collapse;font-size:14px}
table.data-table thead th{
  text-align:left;font-weight:700;font-size:13px;letter-spacing:.04em;color:var(--c-text);
  padding:16px 20px;background:rgba(255,255,255,.05);white-space:nowrap;
}
table.data-table tbody td{
  padding:16px 20px;color:var(--c-muted);border-top:1px solid rgba(255,255,255,.07);vertical-align:top;
}
table.data-table tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
table.data-table tbody td:first-child{color:var(--c-text);font-weight:600}
table.data-table tbody tr:hover{background:rgba(22,224,163,.05)}
.cell-time{color:var(--c-accent);font-weight:600}
.table-note{margin-top:14px;font-size:13px;color:var(--c-muted)}

/* ---------- feature split ---------- */
.split{display:grid;gap:28px;align-items:center}
@media (min-width:900px){.split{grid-template-columns:1.05fr .95fr;gap:48px}}
.split-media{border-radius:var(--radius);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-card);background:linear-gradient(160deg,#0d1a2b,#0a1421)}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.split-media:hover img{transform:scale(1.02)}
.check-list{display:grid;gap:16px;margin-top:24px}
.check-item{display:grid;grid-template-columns:22px 1fr;gap:14px;align-items:start}
.check-dot{
  width:22px;height:22px;border-radius:50%;margin-top:4px;display:grid;place-items:center;
  background:rgba(22,224,163,.14);color:var(--c-primary);font-size:12px;font-weight:900;
}
.check-item h3{font-size:16px;font-weight:600;margin-bottom:4px}
.check-item p{color:var(--c-muted);font-size:14.5px;line-height:1.8}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--radius);
  backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  overflow:hidden;position:relative;transition:border-color .2s var(--ease);
}
.faq-item:hover{border-color:rgba(255,255,255,.2)}
.faq-item.is-open{border-color:rgba(22,224,163,.4)}
.faq-item.is-open::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;background:var(--c-primary)}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;text-align:left;
  padding:20px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--c-text);transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{
  flex:0 0 auto;width:18px;height:18px;position:relative;transition:transform .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px;transition:opacity .2s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(90deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:max-height .24s ease-out,opacity .24s ease-out}
.faq-a-inner{padding:0 22px 22px;color:var(--c-muted);font-size:15px;line-height:1.85}

/* ---------- cta ---------- */
.cta-band{
  background:var(--c-bg-soft);border-top:1px solid rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.06);
  padding:64px 0;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:48px 48px;
}
.cta-inner{position:relative;z-index:1;max-width:720px;margin:0 auto;text-align:center}
.cta-inner h2{font-size:clamp(22px,3.4vw,30px);font-weight:700;line-height:1.3;margin-bottom:14px}
.cta-inner p{color:var(--c-muted);font-size:15px;margin-bottom:28px}
.cta-form{display:grid;gap:12px;max-width:520px;margin:0 auto}
@media (min-width:640px){.cta-form{grid-template-columns:1fr auto}}
.field{
  width:100%;background:rgba(0,0,0,.25);border:1px solid var(--c-line);border-radius:var(--radius-sm);
  padding:14px 16px;color:var(--c-text);font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field::placeholder{color:#6f8299}
.field:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 4px rgba(22,224,163,.16)}
.field.has-error{border-color:var(--c-danger);box-shadow:0 0 0 4px rgba(255,107,107,.14)}
.form-tip{font-size:13px;color:var(--c-muted);grid-column:1/-1;text-align:left}
.form-tip.is-error{color:var(--c-danger)}
.form-tip.is-ok{color:var(--c-primary)}
@media (max-width:639px){
  .cta-form .btn{width:100%}
}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--c-line);background:#050B13;padding:56px 0 28px;position:relative;z-index:1}
.footer-grid{display:grid;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{color:var(--c-muted);font-size:14px;line-height:1.8;max-width:340px}
.footer-grid h4{font-size:14px;font-weight:700;color:var(--c-text);margin-bottom:16px;letter-spacing:.02em}
.footer-list{display:grid;gap:10px}
.footer-list a{color:var(--c-muted);font-size:14px;transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:var(--c-muted);
}
/* ---------- mobile tabbar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:150;display:flex;
  background:rgba(11,23,38,.86);backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--c-line);
  padding-bottom:env(safe-area-inset-bottom);
  height:calc(60px + env(safe-area-inset-bottom));
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:#8FA3BA;font-size:11px;position:relative;transition:color .18s var(--ease);
}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab-item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);transform-origin:center;
  width:26px;height:2px;border-radius:2px;background:var(--c-primary);box-shadow:0 0 8px rgba(22,224,163,.8);
  transition:transform .2s var(--ease);
}
.tab-item.is-active{color:var(--c-primary)}
.tab-item.is-active::before{transform:translateX(-50%) scaleX(1)}
.tab-item:active{color:var(--c-primary)}
@media (min-width:1024px){.tabbar{display:none}}
@media (max-width:1023px){body{padding-bottom:60px}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
}