/* roulang page: index */
:root{
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --bg-0:#050A12;
  --bg-1:#0A121F;
  --bg-2:#0F1B2D;
  --primary:#21C7F5;
  --primary-deep:#0B9BC6;
  --primary-soft:rgba(33,199,245,.10);
  --accent:#FFA23A;
  --ok:#3DDC97;
  --text:#EAF3FF;
  --text-2:#A7BACE;
  --text-3:#6E8399;
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.28);
  --glass:rgba(16,28,46,.62);
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45);
  --shadow-hover:0 26px 70px rgba(0,0,0,.58);
  --ease:cubic-bezier(.22,.61,.36,1);
  --t:180ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg-0);
  overflow-x:hidden;
}
body,button,input,select,textarea,h1,h2,h3,h4,h5,h6{font-family:var(--font)}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color var(--t),background-color var(--t),border-color var(--t),box-shadow var(--t),transform var(--t)}
a:hover,a:focus{color:#7BE7FF;text-decoration:underline;text-underline-offset:3px}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;color:var(--text)}
button{font:inherit;cursor:pointer;background:none;border:0;color:inherit}
:focus-visible{outline:2px solid #7BE7FF;outline-offset:2px}
::selection{background:rgba(33,199,245,.32);color:#fff}

/* ---------- 容器与板块 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0;position:relative}
.section--alt{background:var(--bg-1)}
.section--tight{padding:72px 0}
.section__head{max-width:760px;margin-bottom:44px}
.section__head h2{font-size:28px;letter-spacing:.2px}
.section__desc{margin-top:12px;color:var(--text-2);font-size:16px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.6px;color:var(--primary);
  background:var(--primary-soft);border:1px solid var(--line);
  border-radius:999px;padding:6px 14px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary)}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.3px;
  border:1px solid transparent;text-decoration:none!important;
  transition:transform var(--t),box-shadow var(--t),background-color var(--t),border-color var(--t),color var(--t),filter var(--t);
  white-space:nowrap;
}
.btn--primary{background:var(--primary);color:#04121C!important;box-shadow:0 8px 30px rgba(33,199,245,.35)}
.btn--primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 12px 40px rgba(33,199,245,.5);color:#04121C!important}
.btn--primary:active{transform:translateY(0);filter:brightness(.96)}
.btn--ghost{background:transparent;color:var(--text)!important;border-color:var(--line-strong)}
.btn--ghost:hover{background:var(--primary-soft);border-color:var(--primary);color:var(--text)!important;transform:translateY(-1px)}
.btn--glow{background:linear-gradient(135deg,#21C7F5,#5FE0FF);color:#04121C!important;box-shadow:0 8px 30px rgba(33,199,245,.45)}
.btn--glow:hover{filter:brightness(1.07);transform:translateY(-1px);box-shadow:0 14px 44px rgba(33,199,245,.6);color:#04121C!important}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;
  font-size:12px;font-weight:600;letter-spacing:.5px;
  padding:4px 12px;border-radius:999px;
  color:var(--primary);background:var(--primary-soft);border:1px solid var(--line);
}
.tag--accent{color:#22160A;background:var(--accent);border-color:transparent}
.tag--ok{color:#04121C;background:var(--ok);border-color:transparent}
.tag--sm{font-size:11px;padding:3px 10px}
.tag--plain{color:var(--text-2);background:rgba(255,255,255,.04);border-color:var(--line)}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--bg-2);border-bottom:1px solid var(--line);font-size:13px}
.topbar__inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar__tip{color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar__link{color:var(--primary);font-weight:600}
.topbar__link:hover{text-decoration:underline}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(5,10,18,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header__inner{display:flex;align-items:center;gap:22px;height:74px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none!important}
.brand__mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary),#0F7FA8);
  box-shadow:0 0 18px rgba(33,199,245,.45),inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
}
.brand__mark::after{
  content:"";position:absolute;left:9px;top:7px;width:12px;height:16px;
  border:2px solid #04121C;border-radius:4px 4px 8px 8px;
  opacity:.85;
}
.brand__text{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.4px;white-space:nowrap}
.brand:hover .brand__text{color:var(--primary)}
.nav-chips{display:flex;align-items:center;gap:10px;flex:1 1 auto;min-width:0}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:999px;font-size:14px;font-weight:600;
  color:var(--text-2)!important;border:1px solid var(--line);background:transparent;
  text-decoration:none!important;white-space:nowrap;
}
.chip:hover{color:var(--text)!important;border-color:var(--line-strong);background:rgba(255,255,255,.04)}
.chip.is-active{background:var(--primary);border-color:var(--primary);color:#04121C!important;box-shadow:0 6px 22px rgba(33,199,245,.35)}
.header__actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:72px 0 96px;
  background:
    radial-gradient(720px 360px at 12% 0%,rgba(33,199,245,.10),transparent 70%),
    radial-gradient(560px 320px at 92% 18%,rgba(255,162,58,.07),transparent 72%),
    var(--bg-0);
  overflow:hidden;
}
.hero__grid{align-items:center}
.hero__copy h1{font-size:clamp(30px,4.2vw,46px);line-height:1.24;letter-spacing:.4px}
.hero__sub{margin:20px 0 30px;font-size:17px;line-height:1.85;color:var(--text-2);max-width:520px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap}
.hero__media{position:relative;padding-bottom:26px}
.hero__media>img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-xl);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.hero-card{
  position:absolute;right:22px;bottom:0;width:min(330px,86%);
  padding:18px 20px;border-radius:var(--r-lg);
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  box-shadow:0 20px 60px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.08);
}
.hero-card__title{margin:12px 0 8px;font-size:19px;font-weight:700;line-height:1.4}
.hero-card__meta{margin:0 0 16px;font-size:13.5px;color:var(--text-2)}
.hero-card__meta strong{color:var(--accent);font-variant-numeric:tabular-nums}

/* ---------- 指标条（实色卡） ---------- */
.metrics{padding:0 0 8px;margin-top:-40px;position:relative;z-index:3}
.metrics__grid{gap:0}
.metric{
  height:100%;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:22px 20px;
  box-shadow:0 16px 40px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.metric:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.metric__num{
  display:block;font-size:30px;font-weight:700;line-height:1.2;
  color:var(--primary);font-variant-numeric:tabular-nums;letter-spacing:.5px;
}
.metric__label{display:block;margin-top:8px;font-size:13.5px;color:var(--text-2);line-height:1.7}
.metric-cell{margin-bottom:24px}

/* ---------- 卡片网格 ---------- */
.card-cell{margin-bottom:24px}
.card{
  position:relative;height:100%;display:flex;flex-direction:column;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.card__media{position:relative;overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.card:hover .card__media img{transform:scale(1.04)}
.ratio-16x9{aspect-ratio:16/9}
.ratio-4x3{aspect-ratio:4/3}
.ratio-21x9{aspect-ratio:21/9}
.card__badge{
  position:absolute;left:14px;top:14px;
  font-size:12px;font-weight:700;letter-spacing:.5px;
  padding:4px 12px;border-radius:999px;
  background:var(--accent);color:#22160A;
}
.card__badge--cool{background:var(--primary);color:#04121C}
.card__body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1 1 auto;gap:10px}
.card__body h3{font-size:20px;line-height:1.45}
.card__body p{font-size:15px;color:var(--text-2);line-height:1.8;margin:0}
.card__foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}
.card--hero .card__body h3{font-size:24px}
.card--hero .card__body p{font-size:15.5px}
.card--mini{flex-direction:row;align-items:stretch}
.card--mini .card__media{width:130px;flex:0 0 130px;aspect-ratio:auto}
.card--mini .card__media img{height:100%}
.card--mini .card__body{padding:18px 18px 16px}
.card--mini .card__body h3{font-size:17px}

/* ---------- 最新信息（CMS 循环区） ---------- */
.post-list{display:flex;flex-direction:column;gap:14px}
.post{
  display:block;padding:20px 22px;border-radius:var(--r-md);
  background:var(--bg-2);border:1px solid var(--line);
  text-decoration:none!important;color:var(--text);
  transition:transform var(--t),border-color var(--t),background-color var(--t),box-shadow var(--t);
}
.post:hover{transform:translateY(-2px);border-color:var(--line-strong);background:#122036;box-shadow:0 16px 44px rgba(0,0,0,.45)}
.post__title{font-size:18px;font-weight:600;line-height:1.5;color:var(--text);margin:0 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post:hover .post__title{color:var(--primary)}
.post__excerpt{
  font-size:15px;color:var(--text-2);line-height:1.8;margin:0 0 12px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post__meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-3)}
.post__meta time{font-variant-numeric:tabular-nums}
.side-panel{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-card);
}
.side-panel + .side-panel{margin-top:20px}
.side-panel h3{font-size:17px;margin-bottom:16px}
.side-list li + li{margin-top:6px}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 14px;border-radius:var(--r-sm);font-size:14.5px;
  color:var(--text-2)!important;background:rgba(255,255,255,.025);
  border:1px solid transparent;text-decoration:none!important;
}
.side-list a:hover{color:var(--text)!important;background:var(--primary-soft);border-color:var(--line);transform:translateX(2px)}
.side-list a span{color:var(--text-3);font-size:12.5px}
.empty-state{
  padding:40px 24px;text-align:center;border-radius:var(--r-md);
  border:1px dashed var(--line-strong);background:rgba(255,255,255,.02);
}
.empty-state p{color:var(--text-2);margin-bottom:16px}

/* ---------- 评价轮播 ---------- */
.reviews{
  display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px 4px 18px;scrollbar-width:none;-ms-overflow-style:none;
}
.reviews::-webkit-scrollbar{display:none}
.review{
  flex:0 0 calc((100% - 36px)/3);scroll-snap-align:start;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--shadow-card);
  transition:transform var(--t),border-color var(--t);
}
.review:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.review__score{display:flex;align-items:center;gap:8px;margin-bottom:14px}
.review__score b{font-size:24px;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1}
.review__score i{font-style:normal;font-size:13px;color:var(--text-3)}
.review__text{font-size:15px;color:var(--text-2);line-height:1.85;margin:0 0 16px}
.review__from{font-size:13px;color:var(--text-3);display:flex;justify-content:space-between;gap:10px}

/* ---------- 保障条 ---------- */
.guard{
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:var(--r-xl);
  padding:30px 28px;box-shadow:0 20px 60px rgba(0,0,0,.4);
}
.guard__item{display:flex;gap:14px;align-items:flex-start}
.guard__icon{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(33,199,245,.10);border:1px solid var(--line);color:var(--primary);
}
.guard__icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.guard__item h3{font-size:16px;margin-bottom:4px}
.guard__item p{font-size:13.5px;color:var(--text-2);margin:0;line-height:1.7}

/* ---------- CTA 大区块 ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);border-radius:var(--r-xl);
  padding:52px 48px;box-shadow:0 30px 80px rgba(0,0,0,.5);
}
.cta-panel::after{
  content:"";position:absolute;right:-120px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(33,199,245,.20),transparent 68%);pointer-events:none;
}
.cta-panel h2{font-size:28px;margin-bottom:12px}
.cta-panel__desc{color:var(--text-2);font-size:16px;max-width:520px}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.cta-points li::before{
  content:"";flex:0 0 18px;width:18px;height:18px;margin-top:5px;border-radius:50%;
  background:rgba(61,220,151,.16);border:1px solid rgba(61,220,151,.5);
  background-image:linear-gradient(45deg,transparent 44%,var(--ok) 44%,var(--ok) 56%,transparent 56%);
}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:stretch}
.cta-actions .btn{width:100%}
.cta-note{font-size:13px;color:var(--text-3);text-align:center}

/* ---------- FAQ ---------- */
.faq-grid{column-gap:24px}
.faq-item{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:16px;overflow:hidden;transition:border-color var(--t),background-color var(--t);
}
.faq-item[open]{border-color:var(--line-strong);background:#0C1728}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 52px 18px 22px;position:relative;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:12px;height:12px;
  border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
  transform:translateY(-70%) rotate(45deg);transition:transform var(--t);
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(225deg)}
.faq-item summary:hover{color:var(--primary)}
.faq-item__body{padding:0 22px 20px;font-size:15.5px;line-height:1.85;color:var(--text-2);
  max-height:320px;overflow:auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 0;margin-top:0}
.footer__col h3{font-size:14px;color:var(--text-3);font-weight:600;letter-spacing:.6px;margin-bottom:18px}
.footer__col li + li{margin-top:10px}
.footer__col a{font-size:14px;color:#8FA6BC!important;text-decoration:none!important}
.footer__col a:hover{color:var(--primary)!important}
.footer__col p{font-size:14px;color:#8FA6BC;line-height:1.85}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer__brand .brand__text{font-size:16px}
.footer__bottom{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .container{padding:0 24px}
  .section{padding:72px 0}
  .header__inner{gap:16px}
  .brand__text{font-size:16px}
  .cta-panel{padding:40px 32px}
  .review{flex:0 0 calc((100% - 18px)/2)}
}
@media screen and (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section__head{margin-bottom:30px}
  .section__head h2{font-size:22px}
  .topbar__link{display:none}
  .header__inner{height:64px}
  .nav-toggle{display:flex}
  .nav-chips{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:8px;
    padding:14px 16px 18px;background:rgba(6,12,22,.98);
    border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-chips.is-open{display:flex}
  .nav-chips .chip{width:100%;justify-content:flex-start;height:42px}
  .header__actions .btn--sm{display:none}
  .hero{padding:48px 0 72px}
  .hero__sub{font-size:15.5px;margin:16px 0 24px}
  .hero__media{padding-bottom:0;margin-top:32px}
  .hero-card{position:static;width:100%;margin-top:18px}
  .metrics{margin-top:32px}
  .metrics__grid{margin-bottom:-24px}
  .hero__cta .btn{flex:1 1 46%}
  .review{flex:0 0 84%}
  .guard{padding:24px 20px}
  .cta-panel{padding:32px 22px}
  .cta-panel h2{font-size:22px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media screen and (max-width:519px){
  .metric__num{font-size:25px}
  .card__body{padding:18px}
  .card__body h3{font-size:18px}
  .card--hero .card__body h3{font-size:20px}
  .hero__cta{gap:10px}
  .hero__cta .btn{flex:1 1 100%}
  .post{padding:16px 16px}
  .post__title{font-size:16.5px}
  .faq-item summary{font-size:16px;padding:16px 48px 16px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important;scroll-behavior:auto!important}
  .card:hover,.post:hover,.metric:hover,.review:hover{transform:none}
}

/* roulang page: article */
:root{
  --c-primary:#21C7F5;
  --c-primary-soft:rgba(33,199,245,.10);
  --c-primary-glow:rgba(33,199,245,.35);
  --c-accent:#FFA23A;
  --c-success:#3DDC97;
  --bg-0:#050A12;
  --bg-1:#0A121F;
  --bg-2:#0F1B2D;
  --glass:rgba(16,28,46,.62);
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.28);
  --t-1:#EAF3FF;
  --t-2:#A7BACE;
  --t-3:#6E8399;
  --r-s:10px;
  --r-m:16px;
  --r-l:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-hover:0 26px 70px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:180ms;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--t-1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(760px 460px at 12% -6%, rgba(33,199,245,.09), transparent 62%),
    radial-gradient(620px 420px at 92% 4%, rgba(255,162,58,.06), transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-primary);text-decoration:none;transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),transform var(--dur) var(--ease)}
a:hover{color:#7BE7FF;text-decoration:underline;text-underline-offset:3px}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid #7BE7FF;outline-offset:2px;border-radius:4px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
@media (min-width:1281px){ .container{max-width:1280px} }

/* ---------- 顶部信息条 ---------- */
.topbar{
  position:relative;
  z-index:5;
  background:linear-gradient(90deg,rgba(33,199,245,.12),rgba(255,162,58,.08));
  border-bottom:1px solid var(--line);
}
.topbar__inner{
  min-height:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:var(--t-2);
}
.topbar__inner strong{color:var(--t-1);font-weight:600}
.topbar__link{color:var(--c-primary);font-size:13px}

/* ---------- Header / 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:30;
  background:rgba(5,10,18,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.brand:hover{text-decoration:none}
.brand__mark{
  width:30px;height:30px;
  border-radius:9px;
  background:linear-gradient(140deg,#21C7F5,#0E6E93 70%);
  box-shadow:0 6px 20px rgba(33,199,245,.4),inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
  flex:0 0 auto;
}
.brand__mark::after{
  content:"";
  position:absolute;inset:8px 7px;
  border-radius:3px;
  background:linear-gradient(180deg,#04121C,#04121C);
  opacity:.75;
}
.brand__text{
  font-size:18px;
  font-weight:700;
  color:var(--t-1);
  letter-spacing:.02em;
  white-space:nowrap;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  scrollbar-width:none;
  padding:6px 0;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--t-2);
  font-size:14px;
  white-space:nowrap;
  flex:0 0 auto;
  text-decoration:none;
  transition:all var(--dur) var(--ease);
}
.chip:hover{
  color:var(--t-1);
  border-color:var(--line-strong);
  background:rgba(33,199,245,.06);
  text-decoration:none;
}
.chip.is-active{
  background:var(--c-primary);
  border-color:var(--c-primary);
  color:#04121C;
  font-weight:600;
  box-shadow:0 6px 22px rgba(33,199,245,.32);
}
.header__actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  text-decoration:none;
  border:1px solid transparent;
  transition:all var(--dur) var(--ease);
  white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--sm{height:38px;padding:0 18px;font-size:14px}
.btn--primary{
  background:var(--c-primary);
  color:#04121C;
  box-shadow:0 8px 30px var(--c-primary-glow);
}
.btn--primary:hover{background:#4FD5F8;color:#04121C;box-shadow:0 12px 38px rgba(33,199,245,.5)}
.btn--ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t-1);
}
.btn--ghost:hover{background:var(--c-primary-soft);border-color:var(--c-primary);color:var(--t-1)}
.nav-toggle{
  display:none;
  width:42px;height:38px;
  border:1px solid var(--line);
  border-radius:12px;
  padding:0 10px;
  flex-direction:column;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--t-1);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}

/* ---------- 阅读进度 ---------- */
.read-progress{
  position:fixed;
  top:0;left:0;
  height:3px;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-primary),var(--c-accent));
  z-index:60;
  transition:transform 90ms linear;
}

/* ---------- 面包屑与标题区 ---------- */
.page-main{padding:28px 0 96px;position:relative;z-index:1}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--t-3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--t-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb__sep{color:var(--t-3);opacity:.7}
.breadcrumb__current{color:var(--t-1)}
.article-head{
  border:1px solid var(--line);
  border-radius:var(--r-l);
  background:
    linear-gradient(180deg,rgba(16,28,46,.9),rgba(10,18,31,.92)),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  box-shadow:var(--shadow);
  padding:38px 40px 34px;
  position:relative;
  overflow:hidden;
  margin-bottom:40px;
}
.article-head::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(560px 260px at 88% -20%,rgba(33,199,245,.16),transparent 70%);
  pointer-events:none;
}
.article-head__cat{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:rgba(255,162,58,.14);
  border:1px solid rgba(255,162,58,.35);
  color:var(--c-accent);
  font-size:13px;
  font-weight:600;
  margin-bottom:18px;
  position:relative;
  z-index:1;
}
.article-head h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.32;
  font-weight:700;
  letter-spacing:.01em;
  position:relative;
  z-index:1;
  max-width:900px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 22px;
  margin-top:22px;
  font-size:14px;
  color:var(--t-2);
  position:relative;
  z-index:1;
}
.article-meta i{color:var(--c-primary);margin-right:6px}
.meta-dot{
  display:inline-block;
  width:5px;height:5px;
  border-radius:50%;
  background:var(--c-accent);
  vertical-align:middle;
  margin:0 10px;
}

/* ---------- 文章布局 ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,2fr) minmax(0,1fr);
  gap:40px;
  align-items:start;
}
.article-panel{
  background:var(--bg-1);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:40px 44px 48px;
  box-shadow:var(--shadow);
}
.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:17px;
  line-height:1.9;
  color:#D9E6F5;
}
.article-body p{margin:0 0 18px;color:#D3E1F2}
.article-body h2{
  font-size:24px;
  font-weight:700;
  color:var(--t-1);
  margin:36px 0 14px;
  padding-left:14px;
  border-left:3px solid var(--c-primary);
  line-height:1.5;
}
.article-body h3{
  font-size:20px;
  font-weight:600;
  color:var(--t-1);
  margin:24px 0 12px;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  color:var(--t-1);
  margin:20px 0 10px;
}
.article-body img{
  border-radius:12px;
  margin:22px auto;
  box-shadow:0 16px 40px rgba(0,0,0,.42);
}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px}
.article-body ul li{
  list-style:none;
  position:relative;
  padding-left:6px;
  margin-bottom:10px;
  color:#D3E1F2;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:-16px;top:12px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-accent);
}
.article-body ol{counter-reset:item}
.article-body ol li{
  list-style:none;
  position:relative;
  padding-left:6px;
  margin-bottom:10px;
  counter-increment:item;
  color:#D3E1F2;
}
.article-body ol li::before{
  content:counter(item);
  position:absolute;
  left:-24px;top:2px;
  width:20px;height:20px;
  border-radius:50%;
  background:rgba(33,199,245,.16);
  border:1px solid var(--line-strong);
  color:var(--c-primary);
  font-size:12px;
  line-height:18px;
  text-align:center;
  font-weight:600;
}
.article-body blockquote{
  margin:24px 0;
  padding:20px 22px;
  background:var(--glass);
  border:1px solid var(--line);
  border-left:3px solid var(--c-primary);
  border-radius:var(--r-s);
  color:var(--t-2);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:var(--r-s);
  overflow:hidden;
}
.article-body th{
  background:var(--bg-2);
  color:var(--t-1);
  font-weight:600;
  text-align:left;
}
.article-body th,.article-body td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
}
.article-body tbody tr:nth-child(even){background:rgba(15,27,45,.6)}
.article-body tbody tr:hover{background:rgba(33,199,245,.05)}
.article-body code{
  background:rgba(33,199,245,.12);
  color:#9BEBFF;
  padding:2px 7px;
  border-radius:6px;
  font-size:15px;
}
.article-body hr{
  border:0;
  height:1px;
  background:var(--line);
  margin:32px 0;
}

/* ---------- 文末标签 ---------- */
.tag-row{
  max-width:760px;
  margin:36px auto 0;
  padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
}
.tag-row__label{font-size:14px;color:var(--t-3);margin-right:4px}
.tag{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(33,199,245,.06);
  color:var(--t-2);
  font-size:13px;
  text-decoration:none;
}
.tag:hover{
  color:#04121C;
  background:var(--c-primary);
  border-color:var(--c-primary);
  text-decoration:none;
  transform:translateY(-1px);
}

/* ---------- 侧栏 ---------- */
.article-side{
  position:sticky;
  top:96px;
  display:grid;
  gap:20px;
}
.side-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:22px 22px 24px;
}
.side-card--glass{
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.side-card__title{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:15px;
  font-weight:700;
  color:var(--t-1);
  margin-bottom:16px;
}
.side-card__title i{color:var(--c-primary)}
.toc-list{display:grid;gap:2px}
.toc-list a{
  display:block;
  padding:8px 12px;
  border-radius:8px;
  font-size:14px;
  color:var(--t-2);
  border-left:2px solid transparent;
  text-decoration:none;
  transition:all var(--dur) var(--ease);
}
.toc-list a:hover,
.toc-list a.is-current{
  color:var(--t-1);
  background:rgba(33,199,245,.08);
  border-left-color:var(--c-primary);
  text-decoration:none;
}
.toc-empty{font-size:13px;color:var(--t-3)}
.route-list{display:grid;gap:12px}
.route-item{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:12px;
  border-radius:var(--r-s);
  border:1px solid transparent;
  transition:all var(--dur) var(--ease);
}
.route-item:hover{
  background:rgba(33,199,245,.06);
  border-color:var(--line);
  text-decoration:none;
}
.route-item__node{
  width:12px;height:12px;
  margin-top:7px;
  border-radius:50%;
  background:var(--c-primary);
  box-shadow:0 0 0 4px rgba(33,199,245,.16);
  flex:0 0 auto;
  position:relative;
}
.route-item:not(:last-child) .route-item__node::after{
  content:"";
  position:absolute;
  left:5px;top:14px;
  width:2px;
  height:44px;
  background:linear-gradient(180deg,rgba(33,199,245,.5),rgba(33,199,245,0));
}
.route-item__body strong{
  display:block;
  font-size:14.5px;
  font-weight:600;
  color:var(--t-1);
  margin-bottom:4px;
}
.route-item__body span{font-size:13px;color:var(--t-3);line-height:1.7}
.side-cta{
  background:linear-gradient(140deg,rgba(33,199,245,.16),rgba(255,162,58,.1));
  border:1px solid var(--line-strong);
  border-radius:var(--r-m);
  padding:22px;
  text-align:center;
}
.side-cta strong{display:block;font-size:16px;margin-bottom:8px;color:var(--t-1)}
.side-cta p{font-size:13px;color:var(--t-2);margin-bottom:16px;line-height:1.75}
.side-cta .btn{width:100%;height:42px;font-size:14px}

/* ---------- 空状态 ---------- */
.empty-state{
  max-width:620px;
  margin:0 auto;
  text-align:center;
  padding:46px 28px;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-m);
  background:var(--bg-2);
}
.empty-state i{font-size:30px;color:var(--c-accent);margin-bottom:16px;display:block}
.empty-state h3{font-size:20px;margin-bottom:10px;color:var(--t-1)}
.empty-state p{font-size:15px;color:var(--t-2);margin-bottom:22px}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 0}
.section-head{margin-bottom:28px}
.section-head__eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-accent);
  letter-spacing:.06em;
  margin-bottom:10px;
}
.section-head h2{
  font-size:28px;
  font-weight:700;
  line-height:1.4;
}
.section-head p{margin-top:10px;font-size:15px;color:var(--t-2);max-width:720px}
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:all var(--dur) var(--ease);
  text-decoration:none;
}
.rel-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-hover);
  text-decoration:none;
}
.rel-card__media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
}
.rel-card__media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform 320ms var(--ease);
}
.rel-card:hover .rel-card__media img{transform:scale(1.05)}
.rel-card__badge{
  position:absolute;
  left:12px;top:12px;
  height:26px;
  padding:0 10px;
  border-radius:999px;
  background:var(--c-accent);
  color:#1B0E00;
  font-size:12px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
}
.rel-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.rel-card__body h3{
  font-size:18px;
  font-weight:600;
  line-height:1.5;
  color:var(--t-1);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rel-card__body p{
  font-size:14.5px;
  color:var(--t-2);
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rel-card__foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--t-3);
  border-top:1px solid var(--line);
  padding-top:12px;
}
.rel-card__foot span i{color:var(--c-primary);margin-right:6px}

/* ---------- 底部 CTA ---------- */
.cta-block{
  margin-top:72px;
  border-radius:var(--r-l);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(120deg,rgba(16,28,46,.94),rgba(10,18,31,.9)),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  box-shadow:var(--shadow);
  padding:44px 46px;
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:36px;
  align-items:center;
}
.cta-block h2{font-size:26px;font-weight:700;line-height:1.45;margin-bottom:12px}
.cta-block p{font-size:15.5px;color:var(--t-2);margin-bottom:18px}
.cta-points{display:grid;gap:10px}
.cta-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14.5px;
  color:var(--t-2);
}
.cta-points i{color:var(--c-success);margin-top:4px}
.cta-actions{display:grid;gap:14px;justify-items:stretch}
.cta-actions .btn{width:100%}
.cta-note{font-size:13px;color:var(--t-3);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  margin-top:0;
}
.footer__col{padding-bottom:22px}
.footer__brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.footer__col h3{
  font-size:14px;
  font-weight:600;
  color:var(--t-3);
  letter-spacing:.05em;
  margin-bottom:16px;
}
.footer__col p{font-size:14px;color:var(--t-2);line-height:1.85}
.footer__col ul{display:grid;gap:10px}
.footer__col ul a{
  font-size:14px;
  color:#93A9C0;
  text-decoration:none;
}
.footer__col ul a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.footer__bottom{
  margin-top:26px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:var(--t-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .article-layout{grid-template-columns:1fr;gap:28px}
  .article-side{position:static;top:auto;grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-panel{padding:32px 30px 36px}
  .cta-block{grid-template-columns:1fr;padding:36px 30px;gap:26px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  .header__inner{min-height:64px;gap:12px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
  .nav-toggle{display:inline-flex}
  .nav-chips{
    order:3;
    width:100%;
    flex-basis:100%;
    max-height:0;
    overflow:hidden;
    padding:0;
    transition:max-height 260ms var(--ease),padding var(--dur) var(--ease);
    -webkit-mask-image:none;
  }
  .nav-chips.is-open{
    max-height:280px;
    padding:4px 0 8px;
    flex-direction:column;
    align-items:stretch;
    overflow-y:auto;
  }
  .chip{width:100%;justify-content:center}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .topbar__link{display:none}
  .page-main{padding:22px 0 72px}
  .article-head{padding:28px 22px 26px;border-radius:var(--r-m)}
  .article-panel{padding:24px 20px 28px;border-radius:var(--r-m)}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:30px}
  .article-body h3{font-size:18px}
  .article-side{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .related{padding-top:56px}
  .section-head h2{font-size:22px}
  .cta-block{padding:28px 22px;margin-top:56px}
  .cta-block h2{font-size:21px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .brand__text{font-size:16px}
  .btn{height:42px;padding:0 18px;font-size:14px}
  .btn--sm{height:36px;padding:0 14px}
  .article-head h1{font-size:26px}
  .article-meta{font-size:13px;gap:8px 14px}
  .meta-dot{display:none}
  .article-body{font-size:15.5px}
  .article-body table{font-size:14px}
  .article-body th,.article-body td{padding:10px 12px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .read-progress{transition:none !important}
  .rel-card:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#21C7F5;
  --brand-soft:rgba(33,199,245,.10);
  --warm:#FFA23A;
  --ok:#3DDC97;
  --bg-0:#050A12;
  --bg-1:#0A121F;
  --bg-2:#0F1B2D;
  --text:#EAF3FF;
  --text-2:#A7BACE;
  --text-3:#6E8399;
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.35);
  --glass:rgba(16,28,46,.62);
  --radius:16px;
  --radius-lg:20px;
  --radius-sm:12px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-soft:0 12px 34px rgba(0,0,0,.32);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color 180ms var(--ease),border-color 180ms var(--ease),background-color 180ms var(--ease)}
a:hover{color:#7BE7FF;text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--text);margin:0;font-weight:700;line-height:1.35;letter-spacing:.2px}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid #7BE7FF;outline-offset:2px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
@media (min-width:1280px){.container{max-width:1280px}}
.section{padding:96px 0;position:relative}
.section--alt{background:var(--bg-1)}
.section--tight{padding:72px 0}
.section__head{max-width:720px;margin-bottom:40px}
.section__eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:1px;color:var(--brand);
  background:var(--brand-soft);border:1px solid var(--line);
  border-radius:999px;padding:4px 14px;margin-bottom:16px;
}
.section__title{font-size:28px;margin-bottom:12px}
.section__desc{color:var(--text-2);font-size:16px;margin:0}
.eyebrow-dot{width:6px;height:6px;border-radius:50%;background:var(--brand);display:inline-block}

/* ---------- 顶部信息与导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,10,18,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 180ms var(--ease),background-color 180ms var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 34px rgba(0,0,0,.5);background:rgba(5,10,18,.94)}
.header__inner{
  display:flex;align-items:center;gap:24px;
  min-height:72px;flex-wrap:wrap;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand__mark{
  width:28px;height:28px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(150deg,var(--brand),#0C7FA6);
  box-shadow:0 0 0 1px rgba(120,190,255,.28),0 8px 22px rgba(33,199,245,.30);
  position:relative;
}
.brand__mark::after{
  content:"";position:absolute;inset:8px 8px auto auto;width:8px;height:8px;border-radius:50%;
  background:var(--warm);
}
.brand__text{
  font-size:19px;font-weight:700;color:var(--text);letter-spacing:.4px;white-space:nowrap;
}
.nav-chips{
  display:flex;align-items:center;gap:10px;flex:1 1 auto;
  min-width:0;overflow-x:auto;scrollbar-width:none;
  -ms-overflow-style:none;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;justify-content:center;
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:transparent;
  color:var(--text-2);font-size:14.5px;white-space:nowrap;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.chip:hover{color:var(--text);border-color:var(--line-strong);background:rgba(33,199,245,.08);text-decoration:none}
.chip.is-active{
  background:var(--brand);color:#04121C;font-weight:600;border-color:var(--brand);
  box-shadow:0 6px 20px rgba(33,199,245,.35);
}
.chip.is-active:hover{background:#4FD6FA;color:#04121C}
.header__actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:42px;height:36px;border-radius:10px;
  border:1px solid var(--line);background:transparent;cursor:pointer;
  padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--text-2);border-radius:2px}
.nav-toggle:hover{border-color:var(--line-strong)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;padding:0 22px;height:46px;
  cursor:pointer;white-space:nowrap;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--brand);color:#04121C;box-shadow:0 8px 30px rgba(33,199,245,.35)}
.btn--primary:hover{background:#4FD6FA;color:#04121C;box-shadow:0 12px 38px rgba(33,199,245,.48)}
.btn--ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn--ghost:hover{background:var(--brand-soft);color:var(--text);border-color:var(--brand)}
.btn--warm{background:var(--warm);color:#1B0F02;box-shadow:0 8px 26px rgba(255,162,58,.32)}
.btn--warm:hover{background:#FFB65F;color:#1B0F02}
.btn--sm{height:38px;font-size:14px;padding:0 18px}
.btn--lg{height:52px;font-size:16px;padding:0 28px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

/* ---------- Hero ---------- */
.hero{
  position:relative;margin:28px 0 0;border-radius:24px;overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  background:
    linear-gradient(100deg,rgba(5,10,18,.94) 0%,rgba(5,10,18,.74) 46%,rgba(5,10,18,.42) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  min-height:380px;
  display:flex;align-items:center;
}
.hero__glow{
  position:absolute;inset:auto auto -120px -80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(33,199,245,.18),transparent 68%);pointer-events:none;
}
.hero__inner{
  position:relative;display:grid;grid-template-columns:6fr 5fr;gap:40px;
  align-items:center;padding:56px 0;width:100%;
}
.hero__label{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);
  border:1px solid var(--line);background:var(--brand-soft);
  border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.25;margin-bottom:18px;
  max-width:15em;
}
.hero__sub{font-size:17px;color:var(--text-2);max-width:34em;margin-bottom:26px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.hero__panel{
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--shadow);
}
.hero__panel .badge{margin-bottom:14px}
.hero__panel h2{font-size:19px;margin-bottom:8px}
.hero__panel p{color:var(--text-2);font-size:14.5px;margin-bottom:18px}
.hero__metrics{display:flex;gap:26px;margin-bottom:20px}
.hero__metric span{display:block;font-size:12.5px;color:var(--text-3)}
.hero__metric strong{
  font-size:24px;color:var(--warm);font-variant-numeric:tabular-nums;font-weight:700;
}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.4px;
  background:rgba(255,162,58,.14);color:var(--warm);border:1px solid rgba(255,162,58,.32);
}
.badge--brand{background:var(--brand-soft);color:var(--brand);border-color:rgba(33,199,245,.32)}
.badge--ok{background:rgba(61,220,151,.14);color:var(--ok);border-color:rgba(61,220,151,.32)}

/* ---------- 范围说明条 ---------- */
.scope{
  margin-top:22px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--bg-1);padding:22px 26px;
  display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;
}
.scope i{font-size:22px;color:var(--brand)}
.scope p{margin:0;color:var(--text-2);font-size:15.5px}

/* ---------- 分段标签与筛选 ---------- */
.segment{margin:26px 0 0;display:flex;flex-wrap:wrap;gap:10px}
.filter-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin:22px 0 34px;padding:14px 16px;
  border:1px dashed var(--line);border-radius:var(--radius-sm);
}
.filter-row__label{font-size:13px;color:var(--text-3);margin-right:4px}
.filter{
  height:32px;padding:0 14px;border-radius:999px;cursor:pointer;
  background:transparent;border:1px solid var(--line);color:var(--text-2);font-size:13.5px;
  transition:all 180ms var(--ease);
}
.filter:hover{border-color:var(--line-strong);color:var(--text)}
.filter.is-active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand);font-weight:600}

/* ---------- 实色数据卡 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.stat-card{
  background:var(--bg-2);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow-soft);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease);
}
.stat-card:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.stat-card strong{
  display:block;font-size:32px;font-weight:700;color:var(--text);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat-card strong em{font-style:normal;font-size:16px;color:var(--warm);margin-left:4px}
.stat-card span{display:block;margin-top:8px;font-size:14px;color:var(--text-2)}
.stat-card--accent{background:#0C1C2E;border-color:rgba(33,199,245,.28)}

/* ---------- 卡片网格 ---------- */
.cards{margin-top:8px}
.card{
  height:100%;display:flex;flex-direction:column;
  background:var(--bg-1);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-soft);
  transition:transform 180ms var(--ease),border-color 180ms var(--ease),box-shadow 180ms var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(120,190,255,.28);box-shadow:var(--shadow)}
.card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.card--wide .card__media{aspect-ratio:21/9}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.card:hover .card__media img{transform:scale(1.03)}
.card__tag{
  position:absolute;left:14px;top:14px;z-index:2;
  height:26px;padding:0 12px;border-radius:999px;display:inline-flex;align-items:center;
  background:rgba(5,10,18,.78);border:1px solid rgba(255,162,58,.42);
  color:var(--warm);font-size:12.5px;font-weight:600;
}
.card__body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.card h3{font-size:19px;font-weight:600;line-height:1.5}
.card p{color:var(--text-2);font-size:15px;margin:0;flex:1 1 auto}
.card__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}
.card__foot .link-arrow{font-size:14px;font-weight:600;color:var(--brand)}
.card__foot .meta{font-size:13px;color:var(--text-3)}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap);margin-top:10px}
.step{
  position:relative;padding:26px 22px 24px;
  background:var(--bg-1);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color 180ms var(--ease),transform 180ms var(--ease);
}
.step:hover{border-color:rgba(33,199,245,.34);transform:translateY(-2px)}
.step__num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;margin-bottom:16px;
  background:var(--brand-soft);border:1px solid rgba(33,199,245,.32);
  color:var(--brand);font-weight:700;font-size:16px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--text-2);font-size:14.5px;margin:0}
.progress{margin-top:34px;height:6px;border-radius:999px;background:var(--bg-2);overflow:hidden;border:1px solid var(--line)}
.progress span{display:block;height:100%;width:62%;border-radius:999px;background:linear-gradient(90deg,var(--brand),#7BE7FF)}

/* ---------- 适用场景清单 ---------- */
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px}
.checklist li{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 20px;border-radius:var(--radius-sm);
  background:var(--bg-1);border:1px solid var(--line);
  color:var(--text-2);font-size:15px;
  transition:border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.checklist li:hover{border-color:var(--line-strong);background:#0C1626}
.checklist i{color:var(--ok);font-size:16px;margin-top:5px;flex:0 0 auto}
.checklist strong{display:block;color:var(--text);font-size:15.5px;font-weight:600;margin-bottom:2px}

/* ---------- 保障条 ---------- */
.assure{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  padding:28px;border-radius:var(--radius-lg);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
}
.assure__item{display:flex;flex-direction:column;gap:10px}
.assure__icon{
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(33,199,245,.08);color:var(--brand);font-size:16px;
}
.assure__item h3{font-size:16px;font-weight:600}
.assure__item p{margin:0;color:var(--text-2);font-size:14px}

/* ---------- FAQ ---------- */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.faq__item{
  background:var(--bg-1);border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color 180ms var(--ease),background-color 180ms var(--ease);
}
.faq__item[open]{background:#070F1B;border-color:rgba(120,190,255,.26)}
.faq__item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 20px;font-size:17px;font-weight:600;color:var(--text);
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{
  content:"+";color:var(--brand);font-size:20px;line-height:1;flex:0 0 auto;
  transition:transform 180ms var(--ease);
}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__body{padding:0 20px 20px;color:var(--text-2);font-size:15.5px;line-height:1.85;max-height:320px;overflow:auto}
.faq__body p{margin:0}

/* ---------- CTA ---------- */
.cta-block{
  display:grid;grid-template-columns:7fr 5fr;gap:36px;align-items:center;
  padding:44px;border-radius:24px;
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.cta-block h2{font-size:28px;margin-bottom:14px}
.cta-block p{color:var(--text-2);margin-bottom:20px}
.cta-points{display:flex;flex-direction:column;gap:10px}
.cta-points li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2);font-size:15px}
.cta-points i{color:var(--warm);margin-top:6px;font-size:13px}
.cta-actions{display:flex;flex-direction:column;gap:14px}
.cta-note{font-size:13px;color:var(--text-3);margin:0}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);border-top:1px solid var(--line);
  padding:64px 0 0;margin-top:96px;
}
.footer__col{padding-bottom:32px}
.footer__brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer__col h3{font-size:14px;color:var(--text-3);font-weight:600;letter-spacing:.6px;margin-bottom:16px;text-transform:none}
.footer__col p{color:var(--text-3);font-size:14px;margin:0 0 10px}
.footer__col ul li{margin-bottom:10px}
.footer__col ul li a{color:var(--text-2);font-size:14px}
.footer__col ul li a:hover{color:var(--brand)}
.footer__bottom{
  border-top:1px solid var(--line);padding:20px 0;margin-top:8px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  color:var(--text-3);font-size:13px;
}
.metric-cell{font-variant-numeric:tabular-nums}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding-left:24px;padding-right:24px}
  .section{padding:72px 0}
  .hero__inner{grid-template-columns:1fr;gap:28px;padding:44px 0}
  .hero h1{max-width:none}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .assure{grid-template-columns:repeat(2,1fr)}
  .cta-block{grid-template-columns:1fr;padding:34px}
  .nav-chips{order:3;width:100%;flex:1 1 100%;padding-bottom:12px}
  .header__inner{min-height:auto;padding:12px 0;gap:14px}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .section{padding:56px 0}
  .section__title{font-size:22px}
  .hero{border-radius:18px;min-height:0}
  .hero h1{font-size:30px}
  .hero__sub{font-size:15.5px}
  .faq{grid-template-columns:1fr}
  .checklist{grid-template-columns:1fr}
  .card--wide .card__media{aspect-ratio:16/9}
  .btn{height:44px;padding:0 20px;font-size:14.5px}
  .btn--lg{height:48px;font-size:15px}
  .scope{grid-template-columns:1fr;gap:12px}
  .site-footer{margin-top:72px}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px}
  .brand__text{font-size:16.5px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stat-card{padding:18px 16px}
  .stat-card strong{font-size:26px}
  .steps{grid-template-columns:1fr}
  .assure{grid-template-columns:1fr;padding:22px}
  .hero__metrics{gap:18px}
  .cta-block{padding:24px;border-radius:18px}
  .footer__bottom{flex-direction:column;gap:6px}
  .header__actions .btn{height:36px;font-size:13.5px;padding:0 14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card:hover,.stat-card:hover,.step:hover,.btn:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --brand:#21C7F5;
  --brand-deep:#0E93BF;
  --warm:#FFA23A;
  --ok:#3DDC97;
  --bg-0:#050A12;
  --bg-1:#0A121F;
  --bg-2:#0F1B2D;
  --glass:rgba(16,28,46,.62);
  --line:rgba(120,190,255,.14);
  --line-strong:rgba(120,190,255,.28);
  --text:#EAF3FF;
  --text-2:#A7BACE;
  --text-3:#6E8399;
  --radius-s:12px;
  --radius:16px;
  --radius-l:20px;
  --radius-pill:999px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --shadow-hover:0 28px 70px rgba(0,0,0,.6);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--bg-0);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Hiragino Sans GB","Heiti SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand);text-decoration:none;transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);}
a:hover{text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer;color:inherit;}
input,select,textarea{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid #7BE7FF;outline-offset:2px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}
.grid-x{margin-left:-.9375rem;margin-right:-.9375rem;}
.grid-x>.cell{padding-left:.9375rem;padding-right:.9375rem;}
::selection{background:rgba(33,199,245,.32);color:#fff;}

/* ============ 顶部信息条 ============ */
.topbar{
  background:linear-gradient(90deg,rgba(33,199,245,.14),rgba(255,162,58,.10) 70%,rgba(33,199,245,.05));
  border-bottom:1px solid var(--line);
  font-size:13px;
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:36px;
  padding-top:6px;
  padding-bottom:6px;
}
.topbar__inner p{color:var(--text-2);letter-spacing:.2px;}
.topbar__inner a{color:var(--brand);font-weight:600;white-space:nowrap;}

/* ============ Header / 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,10,18,.88);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.header__inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
  padding-top:10px;
  padding-bottom:10px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--text);
  font-weight:700;
  letter-spacing:.3px;
}
.brand:hover{text-decoration:none;color:var(--text);}
.brand__mark{
  width:28px;
  height:28px;
  border-radius:9px;
  background:
    radial-gradient(circle at 30% 28%,rgba(255,255,255,.85),rgba(255,255,255,0) 46%),
    linear-gradient(135deg,var(--brand),var(--brand-deep));
  box-shadow:0 6px 20px rgba(33,199,245,.42);
  flex:0 0 auto;
}
.brand__text{
  font-size:18px;
  line-height:1.25;
  white-space:nowrap;
}
.nav-chips{
  display:flex;
  align-items:center;
  gap:8px;
  flex:1 1 auto;
  min-width:0;
}
.chip{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:transparent;
  color:var(--text-2);
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
  transition:all 180ms var(--ease);
}
.chip:hover{
  color:var(--text);
  border-color:var(--line-strong);
  background:rgba(33,199,245,.08);
  text-decoration:none;
}
.chip.is-active{
  background:var(--brand);
  border-color:var(--brand);
  color:#04121C;
  font-weight:700;
  box-shadow:0 8px 26px rgba(33,199,245,.34);
}
.chip.is-active:hover{color:#04121C;text-decoration:none;}
.header__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.nav-toggle{
  display:none;
  width:42px;
  height:38px;
  border:1px solid var(--line);
  border-radius:12px;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform 180ms var(--ease),opacity 180ms var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--radius-pill);
  font-size:15.5px;
  font-weight:700;
  letter-spacing:.3px;
  border:1px solid transparent;
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),background 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
  cursor:pointer;
}
.btn:hover{text-decoration:none;}
.btn--primary{
  background:var(--brand);
  color:#04121C;
  box-shadow:0 8px 30px rgba(33,199,245,.35);
}
.btn--primary:hover{
  background:#3ED2FA;
  color:#04121C;
  transform:translateY(-1px);
  box-shadow:0 14px 40px rgba(33,199,245,.5);
}
.btn--primary:active{transform:translateY(0);box-shadow:0 6px 20px rgba(33,199,245,.35);}
.btn--ghost{
  background:transparent;
  color:var(--text);
  border-color:rgba(120,190,255,.35);
}
.btn--ghost:hover{
  background:rgba(33,199,245,.10);
  border-color:var(--line-strong);
  color:var(--text);
  transform:translateY(-1px);
}
.btn--warm{
  background:var(--warm);
  color:#1B1000;
  box-shadow:0 8px 30px rgba(255,162,58,.32);
}
.btn--warm:hover{background:#FFB25E;color:#1B1000;transform:translateY(-1px);box-shadow:0 14px 38px rgba(255,162,58,.44);}
.btn--sm{height:38px;padding:0 18px;font-size:14px;border-radius:var(--radius-pill);}
.btn[aria-disabled="true"],.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:var(--radius-pill);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.4px;
}
.badge--brand{background:rgba(33,199,245,.16);color:#7BE7FF;border:1px solid rgba(33,199,245,.34);}
.badge--warm{background:rgba(255,162,58,.16);color:#FFC38A;border:1px solid rgba(255,162,58,.34);}
.badge--ok{background:rgba(61,220,151,.14);color:#87EFC0;border:1px solid rgba(61,220,151,.32);}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 11px;
  border-radius:8px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:12.5px;
}
.tag--warm{color:#FFC38A;border-color:rgba(255,162,58,.3);background:rgba(255,162,58,.1);}

/* ============ Hero（分类页矮版） ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-1);
}
.cat-hero__bg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.34;
}
.cat-hero__mask{
  position:absolute;
  inset:0;
  background:
    radial-gradient(700px 340px at 12% 20%,rgba(33,199,245,.20),transparent 62%),
    linear-gradient(180deg,rgba(5,10,18,.72),rgba(5,10,18,.95));
}
.cat-hero__inner{
  position:relative;
  padding-top:44px;
  padding-bottom:48px;
  max-width:900px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb span{color:var(--text-3);}
.cat-hero h1{
  margin:14px 0 16px;
  font-size:clamp(28px,3.8vw,42px);
  line-height:1.28;
  font-weight:700;
  letter-spacing:.5px;
}
.cat-hero__lead{
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:760px;
}
.hero__cta{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:28px;
}
.hero__tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}

/* ============ 板块 ============ */
.section{padding:88px 0;}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section__head{max-width:780px;margin-bottom:44px;}
.section__head--center{margin-left:auto;margin-right:auto;text-align:center;}
.section__eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--brand);
  margin-bottom:12px;
}
.section__eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--warm);
  border-radius:2px;
}
.section__title{
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;
  line-height:1.4;
  letter-spacing:.4px;
}
.section__desc{
  margin-top:14px;
  font-size:16px;
  color:var(--text-2);
  line-height:1.85;
}

/* ============ 指标条 ============ */
.metric-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  padding:22px;
  border-radius:var(--radius-l);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  margin-top:-42px;
  position:relative;
  z-index:5;
}
.metric-cell{padding:6px 10px;border-right:1px solid var(--line);}
.metric-cell:last-child{border-right:0;}
.metric-cell strong{
  display:block;
  font-size:28px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.metric-cell span{display:block;margin-top:6px;font-size:13.5px;color:var(--text-2);}

/* ============ 双栏：栏目树 + 行式列表 ============ */
.cat-tree{
  position:sticky;
  top:100px;
  padding:22px;
  border-radius:var(--radius-l);
  background:var(--bg-2);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.cat-tree__title{
  font-size:15px;
  font-weight:700;
  color:var(--text);
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
  margin-bottom:16px;
}
.tree-group{margin-bottom:22px;}
.tree-group:last-child{margin-bottom:0;}
.tree-group h3{
  font-size:13px;
  font-weight:700;
  letter-spacing:1.4px;
  color:var(--warm);
  margin-bottom:10px;
}
.tree-list li + li{margin-top:2px;}
.tree-list a{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius:10px;
  color:var(--text-2);
  font-size:14.5px;
  transition:all 180ms var(--ease);
}
.tree-list a::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:rgba(120,190,255,.4);
  flex:0 0 auto;
  transition:background 180ms var(--ease);
}
.tree-list a:hover{
  background:rgba(33,199,245,.10);
  color:var(--text);
  text-decoration:none;
  transform:translateX(2px);
}
.tree-list a:hover::before{background:var(--brand);}

.row-list{
  border-radius:var(--radius-l);
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.row-item{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:20px;
  padding:20px;
  border-bottom:1px solid var(--line);
  transition:background 180ms var(--ease),border-color 180ms var(--ease);
}
.row-item:last-child{border-bottom:0;}
.row-item:hover{background:rgba(16,28,46,.86);border-color:var(--line-strong);}
.row-item__thumb{
  width:160px;
  height:100px;
  border-radius:var(--radius-s);
  object-fit:cover;
  background:var(--bg-1);
}
.row-item__body{min-width:0;}
.row-item__title{
  font-size:18.5px;
  font-weight:700;
  line-height:1.5;
  color:var(--text);
  display:block;
}
.row-item__title:hover{color:var(--brand);text-decoration:none;}
.row-item__desc{
  margin-top:8px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
}
.row-item__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-top:12px;
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.row-item__meta span{display:inline-flex;align-items:center;gap:6px;}
.row-item__meta i{color:var(--brand);font-size:12px;}
.row-item__meta .is-warm{color:#FFC38A;}
.row-item__meta .is-warm i{color:var(--warm);}

/* ============ 实色卡片（非玻璃） ============ */
.solid-card{
  height:100%;
  padding:28px 24px;
  border-radius:var(--radius);
  background:#0C1728;
  border:1px solid rgba(120,190,255,.10);
  box-shadow:0 18px 44px rgba(0,0,0,.4);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.solid-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.solid-card__icon{
  width:46px;
  height:46px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(33,199,245,.12);
  border:1px solid rgba(33,199,245,.3);
  color:var(--brand);
  font-size:19px;
  margin-bottom:18px;
}
.solid-card.is-warm .solid-card__icon{background:rgba(255,162,58,.14);border-color:rgba(255,162,58,.34);color:var(--warm);}
.solid-card.is-ok .solid-card__icon{background:rgba(61,220,151,.13);border-color:rgba(61,220,151,.32);color:var(--ok);}
.solid-card h3{font-size:19px;font-weight:700;margin-bottom:10px;}
.solid-card p{font-size:15px;color:var(--text-2);line-height:1.85;}
.solid-card ul{margin-top:14px;}
.solid-card ul li{
  position:relative;
  padding-left:18px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.9;
}
.solid-card ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:7px;
  height:7px;
  border-radius:2px;
  background:var(--brand);
}
.solid-card.is-warm ul li::before{background:var(--warm);}
.solid-card.is-ok ul li::before{background:var(--ok);}

/* ============ 流程节点 ============ */
.step-flow{position:relative;padding-left:6px;}
.step-flow__bar{
  position:absolute;
  left:23px;
  top:14px;
  bottom:14px;
  width:2px;
  background:linear-gradient(180deg,var(--brand),rgba(255,162,58,.5),rgba(33,199,245,.12));
  border-radius:2px;
}
.step{
  position:relative;
  display:grid;
  grid-template-columns:48px 1fr;
  gap:20px;
  padding:16px 0;
}
.step__num{
  width:48px;
  height:48px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--bg-2);
  border:1px solid var(--line-strong);
  color:var(--brand);
  font-weight:700;
  font-size:16px;
  font-variant-numeric:tabular-nums;
  position:relative;
  z-index:2;
}
.step:nth-child(3n) .step__num{color:var(--warm);border-color:rgba(255,162,58,.34);}
.step__body h3{font-size:17.5px;font-weight:700;margin-bottom:6px;}
.step__body p{font-size:15px;color:var(--text-2);line-height:1.85;}
.step__body .tag{margin-top:10px;}

/* ============ FAQ ============ */
.faq-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
}
.faq-item{
  border-radius:var(--radius);
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:hidden;
  transition:border-color 180ms var(--ease),background 180ms var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item[open]{background:#081120;border-color:var(--line-strong);}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 22px;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  font-size:22px;
  font-weight:400;
  color:var(--brand);
  line-height:1;
  transition:transform 180ms var(--ease),color 180ms var(--ease);
  flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--warm);}
.faq-body{
  padding:0 22px 22px;
  font-size:15.5px;
  line-height:1.85;
  color:var(--text-2);
  max-height:340px;
  overflow:auto;
}

/* ============ CTA 大区块 ============ */
.cta-panel{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-l);
  border:1px solid var(--line-strong);
  background:
    radial-gradient(520px 260px at 88% 16%,rgba(255,162,58,.16),transparent 66%),
    radial-gradient(620px 300px at 6% 90%,rgba(33,199,245,.18),transparent 68%),
    var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
  padding:48px;
  display:grid;
  grid-template-columns:1.35fr 1fr;
  gap:40px;
  align-items:center;
}
.cta-panel h2{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
  line-height:1.4;
  margin-bottom:14px;
}
.cta-panel p{color:var(--text-2);font-size:16px;line-height:1.85;}
.cta-points{margin-top:22px;}
.cta-points li{
  position:relative;
  padding-left:26px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.9;
}
.cta-points li::before{
  content:"✓";
  position:absolute;
  left:0;
  top:0;
  color:var(--ok);
  font-weight:700;
}
.cta-actions{
  display:flex;
  flex-direction:column;
  gap:14px;
  align-items:stretch;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:64px 0 0;
  margin-top:0;
}
.footer__col{padding-top:8px;padding-bottom:8px;}
.footer__col h3{
  font-size:14px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--text-3);
  margin-bottom:16px;
}
.footer__col p{font-size:14px;color:var(--text-3);line-height:1.9;}
.footer__brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
  color:var(--text);
  font-weight:700;
}
.footer__col ul li + li{margin-top:10px;}
.footer__col ul a{color:#96AEC5;font-size:14px;}
.footer__col ul a:hover{color:var(--brand);text-decoration:none;}
.footer__bottom{
  margin-top:44px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}

/* ============ 响应式 ============ */
@media screen and (max-width:1280px){
  .container{max-width:1140px;}
}
@media screen and (max-width:1024px){
  .container{padding-left:24px;padding-right:24px;}
  .section{padding:72px 0;}
  .cat-tree{position:static;}
  .cta-panel{grid-template-columns:1fr;padding:36px;gap:28px;}
  .metric-bar{grid-template-columns:repeat(2,1fr);}
  .metric-cell:nth-child(2){border-right:0;}
  .metric-cell:nth-child(1),.metric-cell:nth-child(2){border-bottom:1px solid var(--line);padding-bottom:16px;}
  .metric-cell:nth-child(3),.metric-cell:nth-child(4){padding-top:16px;}
}
@media screen and (max-width:768px){
  body{font-size:15.5px;}
  .header__inner{flex-wrap:wrap;gap:12px;min-height:64px;}
  .brand__text{font-size:16.5px;}
  .nav-toggle{display:flex;}
  .nav-chips{
    order:3;
    width:100%;
    overflow-x:auto;
    padding-bottom:10px;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
    mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 14px),transparent 100%);
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 14px),transparent 100%);
  }
  .nav-chips::-webkit-scrollbar{display:none;}
  .nav-chips.is-collapsed{display:none;}
  .header__actions .btn--sm{display:none;}
  .topbar__inner a{display:none;}
  .cat-hero__inner{padding-top:32px;padding-bottom:36px;}
  .section{padding:56px 0;}
  .section__head{margin-bottom:30px;}
  .metric-bar{margin-top:-28px;padding:16px;gap:10px;}
  .metric-cell strong{font-size:22px;}
  .metric-cell span{font-size:12.5px;}
  .cat-tree{
    padding:16px;
    border-radius:var(--radius);
    margin-bottom:20px;
  }
  .cat-tree__title{display:none;}
  .cat-tree__groups{display:flex;gap:18px;overflow-x:auto;scrollbar-width:none;padding-bottom:4px;}
  .cat-tree__groups::-webkit-scrollbar{display:none;}
  .tree-group{min-width:180px;margin-bottom:0;}
  .row-item{grid-template-columns:1fr;gap:14px;padding:18px 16px;}
  .row-item__thumb{width:100%;height:172px;}
  .row-item__title{font-size:17px;}
  .faq-grid{grid-template-columns:1fr;}
  .cta-panel{padding:28px 22px;border-radius:var(--radius);}
  .site-footer{padding-top:48px;}
  .footer__bottom{flex-direction:column;gap:8px;}
}
@media screen and (max-width:520px){
  .container{padding-left:16px;padding-right:16px;}
  .brand__text{font-size:15.5px;white-space:normal;}
  .cat-hero h1{font-size:24px;}
  .cat-hero__lead{font-size:15.5px;}
  .hero__cta{flex-direction:column;align-items:stretch;}
  .hero__cta .btn{width:100%;}
  .metric-bar{grid-template-columns:1fr;}
  .metric-cell{border-right:0;border-bottom:1px solid var(--line);padding:10px 4px;}
  .metric-cell:last-child{border-bottom:0;}
  .row-item__thumb{height:140px;}
  .step{grid-template-columns:40px 1fr;gap:14px;}
  .step__num{width:40px;height:40px;border-radius:13px;font-size:15px;}
  .step-flow__bar{left:19px;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}