/* roulang page: index */
:root{
  --bg:#060A14;
  --panel:#0B1222;
  --glass:rgba(20,32,56,.55);
  --line:rgba(120,200,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --focus-ring:rgba(43,224,176,.55);
  --mint:#2BE0B0;
  --blue:#4DA3FF;
  --orange:#FF7A45;
  --text:#E9F1FF;
  --muted:#8FA2C0;
  --err:#FF5C6C;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(43,224,176,.35),0 14px 34px -12px rgba(43,224,176,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --bs-body-bg:#060A14;
  --bs-body-color:#E9F1FF;
  --bs-border-color:rgba(120,200,255,.14);
  --bs-link-color:#2BE0B0;
  --bs-link-hover-color:#5CF0CB;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(circle at 82% 4%,rgba(43,224,176,.07),transparent 42%),
    radial-gradient(circle at 6% 96%,rgba(255,122,69,.05),transparent 38%),
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:auto,auto,68px 68px,68px 68px;
  background-attachment:fixed,fixed,scroll,scroll;
}
img{max-width:100%;display:block}
a{color:var(--mint);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#5CF0CB}
button,input{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,10,20,.76);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line-soft);
}
.nav-shell{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:inline-flex;align-items:center;gap:3px;flex-shrink:0;text-decoration:none}
.brand-mark{width:30px;height:30px;color:var(--mint);flex-shrink:0;margin-right:7px}
.brand-text{font-size:19px;font-weight:800;color:#fff;letter-spacing:-.01em;line-height:1}
.brand-tag{
  margin-left:6px;font-size:11px;font-weight:600;letter-spacing:.06em;
  color:var(--mint);background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.42);border-radius:6px;
  padding:3px 6px;line-height:1;white-space:nowrap;
}
.nav-divider{width:1px;height:24px;background:var(--line-soft);flex-shrink:0}
.nav-search{position:relative;flex:1 1 auto;max-width:460px;min-width:200px}
.nav-search svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.nav-search input{
  width:100%;height:44px;border-radius:var(--r-pill);
  background:rgba(15,25,44,.75);border:1px solid var(--line);
  color:var(--text);font-size:14px;padding:0 18px 0 44px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.nav-search input::placeholder{color:var(--muted)}
.nav-search input:focus{
  outline:none;border-color:var(--focus-ring);background:rgba(18,30,52,.9);
  box-shadow:0 0 0 3px rgba(43,224,176,.12),0 0 22px -6px rgba(43,224,176,.55);
}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto;flex-shrink:0}
.nav-links a{
  position:relative;color:var(--muted);font-size:15px;font-weight:600;
  padding:7px 0;transition:color .22s var(--ease);white-space:nowrap;
}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:#fff}
.nav-links a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--mint);border-radius:2px;
}
.nav-search-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;margin-left:auto;flex-shrink:0;
  border-radius:var(--r-pill);background:rgba(20,32,56,.7);
  border:1px solid var(--line);color:var(--mint);cursor:pointer;
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-search-toggle:hover{border-color:var(--focus-ring);transform:translateY(-2px)}
.mobile-search-drawer{display:none;border-top:1px solid var(--line-soft);background:rgba(9,15,28,.98);padding:16px 0 20px}
.mobile-search-drawer.open{display:block}
.mobile-search-drawer input{
  width:100%;height:48px;border-radius:var(--r-pill);
  background:rgba(15,25,44,.9);border:1px solid var(--line);
  color:var(--text);font-size:15px;padding:0 18px;
}
.mobile-search-drawer input::placeholder{color:var(--muted)}
.mobile-search-drawer input:focus{outline:none;border-color:var(--focus-ring);box-shadow:0 0 0 3px rgba(43,224,176,.14)}
.hot-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.hot-chips span{
  font-size:12.5px;color:var(--muted);border:1px solid var(--line-soft);
  border-radius:var(--r-pill);padding:4px 12px;background:rgba(20,32,56,.6);
}
.mobile-nav-scroll{display:none;gap:20px;overflow-x:auto;height:42px;align-items:center;border-top:1px solid var(--line-soft);padding:0 32px;scrollbar-width:none}
.mobile-nav-scroll::-webkit-scrollbar{display:none}
.mobile-nav-scroll a{font-size:14px;font-weight:600;color:var(--muted);white-space:nowrap;padding:10px 0;position:relative}
.mobile-nav-scroll a.active{color:#fff}
.mobile-nav-scroll a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--mint);border-radius:2px}

/* ============ 通用按钮 ============ */
.btn-primary,.btn-secondary,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),color .22s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,#2BE0B0,#17B58C);
  color:#04150F;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{color:#04150F;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(43,224,176,.55),0 18px 40px -12px rgba(43,224,176,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:rgba(20,32,56,.62);border-color:var(--line);color:var(--text)}
.btn-secondary:hover{color:#fff;border-color:rgba(43,224,176,.55);transform:translateY(-2px);box-shadow:0 12px 30px -16px rgba(43,224,176,.6)}
.btn-secondary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--mint);padding:0 6px;height:auto}
.btn-ghost:hover{color:#5CF0CB}

/* ============ 首屏 ============ */
.hero{position:relative;padding:72px 0 96px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center right/cover no-repeat;
  opacity:.16;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,10,20,.35),rgba(6,10,20,.96));
}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.14em;
  color:var(--mint);border:1px solid rgba(43,224,176,.3);
  background:rgba(43,224,176,.08);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:22px;
}
.hero h1{
  font-size:clamp(1.85rem,3.3vw,2.85rem);
  font-weight:800;line-height:1.24;letter-spacing:-.01em;
  color:#fff;margin-bottom:20px;
}
.hero-sub{color:var(--muted);font-size:16px;line-height:1.9;max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:36px;
  border-top:1px solid var(--line-soft);padding-top:24px;
}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{
  font-size:22px;font-weight:800;color:var(--orange);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;line-height:1.4;
}
.hero-stats span{font-size:13px;color:var(--muted);line-height:1.6}
.hero-visual{position:relative}
.hero-frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  aspect-ratio:16/11;
  background:linear-gradient(135deg,#0B1222,#152441);
}
.hero-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(210deg,rgba(6,10,20,.25),rgba(6,10,20,.88));
}
.hero-frame img{width:100%;height:100%;object-fit:cover}
.hero-badge{
  position:absolute;top:16px;right:16px;z-index:2;
  font-size:12px;font-weight:600;color:var(--orange);
  background:rgba(255,122,69,.14);border:1px solid rgba(255,122,69,.4);
  border-radius:var(--r-pill);padding:6px 12px;line-height:1;
  backdrop-filter:blur(8px);
}

/* ============ 区块基础 ============ */
.section{position:relative;padding:96px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;
  color:#fff;line-height:1.32;margin-bottom:12px;
}
.section-head p{color:var(--muted);font-size:15px;line-height:1.85}
.section-alt{background:linear-gradient(180deg,rgba(11,18,34,.72),rgba(6,10,20,0))}

/* ============ 徽章与标签 ============ */
.tags{display:flex;flex-wrap:wrap;gap:8px}
.badge-soft,.badge-time{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;white-space:nowrap;
}
.badge-soft{color:var(--mint);background:rgba(43,224,176,.12);border:1px solid rgba(43,224,176,.26)}
.badge-time{color:var(--orange);background:rgba(255,122,69,.12);border:1px solid rgba(255,122,69,.28)}

/* ============ 主题封面墙 ============ */
.cover-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cover-card{
  display:flex;flex-direction:column;text-decoration:none;color:inherit;
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.cover-card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.5);box-shadow:var(--shadow-glow);color:inherit}
.cover-card .thumb{
  aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,#0B1222,#152441);
}
.cover-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.cover-card:hover .thumb img{transform:scale(1.04)}
.cover-card .card-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px}
.cover-card h3{font-size:17px;font-weight:600;color:#fff;line-height:1.5;margin:0}

/* ============ 合集目录 ============ */
.catalog-grid{display:grid;grid-template-columns:1.65fr .85fr;gap:32px;align-items:start}
.catalog-list{
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.catalog-item{
  display:flex;align-items:center;gap:18px;height:56px;padding:0 24px;
  border-bottom:1px solid var(--line-soft);color:var(--text);
  text-decoration:none;transition:background .2s var(--ease),color .2s var(--ease);
}
.catalog-item:last-child{border-bottom:0}
.catalog-item:hover{background:rgba(43,224,176,.07);color:#fff}
.catalog-item .num{
  font-size:13px;font-weight:700;color:var(--orange);
  font-variant-numeric:tabular-nums;letter-spacing:.08em;width:32px;flex-shrink:0;
}
.catalog-item .title-txt{font-size:15.5px;font-weight:600;line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.catalog-item svg{margin-left:auto;color:var(--muted);flex-shrink:0;transition:transform .22s var(--ease),color .22s var(--ease)}
.catalog-item:hover svg{color:var(--mint);transform:translateX(3px)}
.catalog-aside{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.catalog-aside h3{font-size:16px;font-weight:700;color:#fff;margin-bottom:18px}
.stat-list{display:grid;gap:14px;margin-bottom:22px}
.stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--line-soft);padding-bottom:12px}
.stat-row:last-child{border-bottom:0;padding-bottom:0}
.stat-row span{font-size:13.5px;color:var(--muted)}
.stat-row strong{font-size:17px;font-weight:800;color:var(--mint);font-variant-numeric:tabular-nums}
.catalog-aside .note{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:20px}

/* ============ 精选条目 ============ */
.feature-lg{
  display:flex;flex-direction:column;height:100%;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;text-decoration:none;color:inherit;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feature-lg:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.5);box-shadow:var(--shadow-glow);color:inherit}
.feature-lg .thumb{aspect-ratio:16/8;overflow:hidden;background:linear-gradient(135deg,#0B1222,#152441)}
.feature-lg .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.feature-lg:hover .thumb img{transform:scale(1.04)}
.feature-lg .card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px}
.feature-lg h3{font-size:20px;font-weight:700;color:#fff;line-height:1.45;margin:0}
.feature-lg p{font-size:14.5px;color:var(--muted);line-height:1.85;margin:0}
.feature-sm{
  display:flex;flex-direction:column;height:100%;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;text-decoration:none;color:inherit;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feature-sm:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.5);box-shadow:var(--shadow-glow);color:inherit}
.feature-sm .thumb{aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#0B1222,#152441)}
.feature-sm .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.feature-sm:hover .thumb img{transform:scale(1.04)}
.feature-sm .card-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px}
.feature-sm h3{font-size:14.5px;font-weight:600;color:#fff;line-height:1.5;margin:0}
.feature-sm .meta{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}

/* ============ 最新信息（CMS） ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;gap:14px;padding:16px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  text-decoration:none;color:inherit;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(43,224,176,.45);background:rgba(24,38,64,.7);color:inherit}
.news-thumb{
  width:96px;height:72px;flex:0 0 96px;border-radius:var(--r-sm);overflow:hidden;
  background:linear-gradient(135deg,#0B1222,#152441);
}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-body{min-width:0;display:flex;flex-direction:column;gap:6px}
.news-title{
  font-size:15px;font-weight:600;color:#fff;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-sum{
  font-size:13px;color:var(--muted);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:auto;font-size:12px;color:var(--muted)}
.news-empty{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:48px 24px;border-radius:var(--r-md);
  border:1px dashed var(--line);background:rgba(20,32,56,.4);color:var(--muted);
  font-size:14px;text-align:center;
}
.news-empty svg{color:rgba(143,162,192,.7)}

/* ============ 相关推荐 ============ */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rec-card{
  display:flex;align-items:center;gap:16px;padding:16px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  text-decoration:none;color:inherit;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.rec-card:hover{transform:translateY(-3px);border-color:rgba(43,224,176,.45);color:inherit}
.rec-card .thumb{width:104px;height:78px;flex:0 0 104px;border-radius:var(--r-sm);overflow:hidden;background:linear-gradient(135deg,#0B1222,#152441)}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover}
.rec-card h3{font-size:15px;font-weight:600;color:#fff;line-height:1.5;margin-bottom:6px}
.rec-card .meta{font-size:12.5px;color:var(--muted)}

/* ============ FAQ ============ */
.faq-acc{max-width:900px}
.faq-acc .accordion-item{
  background:var(--glass);border:1px solid var(--line);
  border-radius:var(--r-md)!important;overflow:hidden;margin-bottom:14px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .22s var(--ease);
}
.faq-acc .accordion-item:has(.accordion-button:not(.collapsed)){border-color:rgba(43,224,176,.4)}
.faq-acc .accordion-header{margin:0}
.faq-acc .accordion-button{
  background:transparent;color:#fff;font-size:15.5px;font-weight:600;
  padding:16px 56px 16px 22px;min-height:56px;box-shadow:none;
  border-radius:0!important;line-height:1.6;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--mint);background:transparent}
.faq-acc .accordion-button:focus{box-shadow:none;outline:none;border-color:transparent}
.faq-acc .accordion-button::after{
  width:16px;height:16px;background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%232BE0B0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-180deg)}
.faq-acc .accordion-body{
  padding:0 22px 20px;color:var(--muted);font-size:14.5px;line-height:1.9;
  border-top:1px solid rgba(43,224,176,.22);padding-top:16px;
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:32px;padding:48px;
  border-radius:var(--r-lg);border:1px solid var(--line);overflow:hidden;
  background:rgba(20,32,56,.6) url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,10,20,.94),rgba(6,10,20,.62));
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-size:clamp(1.35rem,2.2vw,1.75rem);font-weight:700;color:#fff;line-height:1.4;margin-bottom:10px}
.cta-band p{color:var(--muted);font-size:14.5px;line-height:1.85;max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.copy-tip{font-size:13px;color:var(--mint);margin-top:12px;min-height:20px}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,32,56,.85);border:1px solid var(--line);
  color:var(--mint);cursor:pointer;opacity:0;pointer-events:none;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:opacity .26s var(--ease),transform .26s var(--ease),border-color .22s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{transform:translateY(-3px);border-color:var(--focus-ring)}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line-soft);
  background:linear-gradient(180deg,rgba(11,18,34,.7),rgba(6,10,20,.98));
  padding:64px 0 0;margin-top:96px;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--muted);line-height:1.85;margin-bottom:20px;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:13.5px;color:var(--muted);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  border-top:1px solid var(--line-soft);padding:22px 0;
  font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;align-items:center;
}
.footer-bottom .tech{font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .cover-grid{grid-template-columns:repeat(2,1fr)}
  .rec-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{gap:40px}
}
@media (max-width:991.98px){
  .nav-shell{height:64px;gap:14px}
  .nav-search{display:none}
  .nav-links{display:none}
  .nav-divider{display:none}
  .nav-search-toggle{display:inline-flex}
  .mobile-nav-scroll{display:flex;padding:0 32px}
  .hero{padding:52px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:2}
  .hero-frame{aspect-ratio:16/9}
  .section{padding:72px 0}
  .catalog-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:36px}
}
@media (max-width:767.98px){
  .container{padding-left:20px;padding-right:20px}
  .mobile-nav-scroll{padding:0 20px}
  .hero{padding:40px 0 56px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15px}
  .hero-stats{gap:24px}
  .section{padding:56px 0}
  .cover-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .rec-grid{grid-template-columns:1fr}
  .feature-lg h3{font-size:18px}
  .catalog-item{padding:0 18px;height:56px}
  .catalog-item .title-txt{font-size:14.5px}
  .cta-band{padding:28px 22px}
  .cta-actions{width:100%}
  .cta-actions .btn-primary,.cta-actions .btn-secondary{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .site-footer{padding-top:48px;margin-top:56px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575.98px){
  .hero-actions .btn-primary,.hero-actions .btn-secondary{width:100%}
  .hero-stats{gap:20px}
  .hero-stats strong{font-size:19px}
  .brand-text{font-size:17px}
  .brand-tag{font-size:10px}
  .news-card{flex-direction:column}
  .news-thumb{width:100%;height:132px;flex:0 0 auto}
  .rec-card{flex-direction:column;align-items:flex-start}
  .rec-card .thumb{width:100%;height:140px;flex:0 0 auto}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: article */
:root{
  --bg:#060A14;
  --panel:#0B1222;
  --glass:rgba(20,32,56,.55);
  --line:rgba(120,200,255,.14);
  --focus:rgba(43,224,176,.55);
  --mint:#2BE0B0;
  --mint-soft:rgba(43,224,176,.12);
  --blue:#4DA3FF;
  --orange:#FF7A45;
  --orange-soft:rgba(255,122,69,.13);
  --text:#E9F1FF;
  --text-2:#D7E2F5;
  --muted:#8FA2C0;
  --divider:rgba(255,255,255,.08);
  --err:#FF5C6C;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(43,224,176,.35),0 14px 34px -12px rgba(43,224,176,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(680px 460px at 84% 6%,rgba(43,224,176,.07),transparent 70%),
    radial-gradient(560px 420px at 6% 92%,rgba(255,122,69,.05),transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(140,190,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,190,255,.04) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 85%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 20%,transparent 85%);
}
img{max-width:100%;display:block}
a{color:var(--mint);text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
a:hover{color:#6BF3D2}
button{font-family:inherit}
:where(a,button,input,summary,[tabindex]):focus-visible{
  outline:2px solid var(--mint);
  outline-offset:3px;
  border-radius:8px;
}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 32px;
  position:relative;
  z-index:1;
}
.site-header,.site-main,.site-footer{position:relative;z-index:2}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--divider);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  text-decoration:none;
  color:var(--text);
  font-weight:800;
  letter-spacing:-.01em;
  flex:none;
}
.brand-mark{width:30px;height:30px;color:var(--mint);flex:none}
.brand-text{font-size:1.0625rem;white-space:nowrap}
.brand-tag{
  margin-left:6px;
  font-size:11px;
  font-weight:600;
  line-height:1.6;
  color:var(--mint);
  background:var(--mint-soft);
  border:1px solid rgba(43,224,176,.3);
  border-radius:var(--r-pill);
  padding:2px 8px;
  white-space:nowrap;
}
.header-sep{
  width:1px;height:26px;flex:none;
  background:linear-gradient(180deg,transparent,rgba(120,200,255,.28),transparent);
}
.nav-search{
  position:relative;
  flex:1 1 auto;
  max-width:520px;
  display:flex;
  align-items:center;
  height:44px;
  padding:0 16px 0 44px;
  background:rgba(20,32,56,.55);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.nav-search svg{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;color:var(--muted);pointer-events:none;
}
.nav-search input{
  width:100%;
  border:0;outline:none;background:none;
  color:var(--text);
  font-size:14px;
  line-height:1.6;
}
.nav-search input::placeholder{color:rgba(143,162,192,.85)}
.nav-search:focus-within{
  border-color:var(--focus);
  box-shadow:0 0 0 3px rgba(43,224,176,.12);
}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:auto;
}
.nav-links a{
  color:var(--muted);
  font-size:14.5px;
  font-weight:500;
  padding:6px 0;
  border-bottom:2px solid transparent;
  white-space:nowrap;
  transition:color .22s var(--ease),border-color .22s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{color:var(--text);border-bottom-color:var(--mint)}
.icon-btn{
  display:none;
  align-items:center;justify-content:center;
  width:44px;height:44px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(20,32,56,.55);
  color:var(--text);
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.icon-btn:hover{border-color:var(--focus);color:var(--mint)}
.icon-btn svg{width:20px;height:20px}
.search-drawer{
  display:none;
  background:rgba(8,14,26,.97);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  padding:16px 0 18px;
  position:relative;
  z-index:55;
}
.search-drawer.open{display:block}
.drawer-search{
  display:flex;align-items:center;
  height:48px;
  padding:0 18px;
  background:rgba(20,32,56,.6);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
}
.drawer-search input{
  width:100%;border:0;outline:none;background:none;
  color:var(--text);font-size:15px;
}
.drawer-search input::placeholder{color:rgba(143,162,192,.85)}
.hot-chips{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:12px;font-size:13px;color:var(--muted);
}
.hot-chips a{
  display:inline-block;
  padding:4px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--text-2);
  font-size:13px;
  background:rgba(20,32,56,.5);
}
.hot-chips a:hover{border-color:var(--focus);color:var(--mint)}

/* ============ 主体 ============ */
.site-main{padding-bottom:96px}
.article-hero{padding:44px 0 0}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--muted);
  margin-bottom:28px;
}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb .sep{width:14px;height:14px;color:rgba(143,162,192,.55);flex:none}
.breadcrumb .current{color:var(--text-2)}
.article-title{
  font-size:clamp(2rem,4.6vw,3.4rem);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.01em;
  margin:0 0 20px;
  color:#fff;
  max-width:900px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13.5px;color:var(--muted);
  margin-bottom:32px;
}
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;
  border-radius:var(--r-pill);
  font-size:12px;font-weight:600;
  line-height:1;white-space:nowrap;
}
.badge-mint{color:var(--mint);background:var(--mint-soft);border:1px solid rgba(43,224,176,.28)}
.badge-orange{color:var(--orange);background:var(--orange-soft);border:1px solid rgba(255,122,69,.26);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.meta-share{
  margin-left:auto;
  display:inline-flex;align-items:center;gap:8px;
  height:34px;padding:0 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(20,32,56,.55);
  color:var(--text-2);
  font-size:13px;font-weight:500;
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.meta-share:hover{border-color:var(--focus);color:var(--mint);transform:translateY(-1px)}
.meta-share svg{width:15px;height:15px}
.article-cover{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  background:linear-gradient(160deg,#0E1A30,#060A14 70%);
  margin-bottom:56px;
}
.article-cover img{
  width:100%;
  aspect-ratio:21/9;
  height:auto;
  object-fit:cover;
}
.article-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.15),rgba(6,10,20,.55));
  pointer-events:none;
}

/* 阅读区 */
.read-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:56px;
  align-items:start;
}
.article-main-col{min-width:0}
.article-body{
  max-width:820px;
  font-size:16px;
  line-height:1.9;
  color:var(--text-2);
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 22px}
.article-body h2{
  position:relative;
  margin:40px 0 16px;
  padding-left:16px;
  font-size:clamp(1.5rem,2.6vw,2rem);
  font-weight:700;
  line-height:1.3;
  color:#fff;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;
  width:4px;height:1.05em;border-radius:2px;
  background:var(--mint);
}
.article-body h3{
  margin:28px 0 12px;
  font-size:1.25rem;
  font-weight:600;
  line-height:1.4;
  color:#fff;
}
.article-body h4{
  margin:22px 0 10px;
  font-size:1.0625rem;
  font-weight:600;
  color:#fff;
}
.article-body ul,.article-body ol{
  margin:0 0 22px;
  padding-left:22px;
}
.article-body ul{list-style:none;padding-left:20px}
.article-body ul > li{position:relative;padding-left:6px}
.article-body ul > li::before{
  content:"";position:absolute;left:-14px;top:.72em;
  width:6px;height:6px;border-radius:2px;
  background:var(--mint);
}
.article-body ol{list-style:decimal}
.article-body ol > li::marker{color:var(--mint);font-variant-numeric:tabular-nums}
.article-body li{margin-bottom:8px}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--mint);
  background:rgba(20,32,56,.45);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--text-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  width:100%;height:auto;
  border-radius:var(--r-md);
  margin:24px 0 12px;
  border:1px solid var(--line);
}
.article-body figure{margin:24px 0}
.article-body figcaption{
  font-size:13px;
  color:var(--muted);
  line-height:1.6;
  margin-top:2px;
}
.article-body a{
  color:var(--mint);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-body a:hover{color:#6BF3D2}
.article-body strong{color:#fff;font-weight:600}
.article-body code{
  padding:1px 6px;
  border-radius:6px;
  background:rgba(77,163,255,.13);
  color:#9CCDFF;
  font-size:.92em;
}
.article-body pre{
  margin:24px 0;
  padding:18px 20px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(11,18,34,.9);
  overflow-x:auto;
}
.article-body pre code{background:none;padding:0;color:var(--text-2)}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:14.5px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:11px 14px;
  border-bottom:1px solid var(--divider);
  text-align:left;
  vertical-align:top;
}
.article-body thead th{
  color:var(--mint);
  font-weight:600;
  background:rgba(20,32,56,.7);
  font-size:13.5px;
}
.article-body tbody tr:hover{background:rgba(77,163,255,.05)}
.article-body hr{
  border:0;height:1px;background:var(--divider);margin:36px 0;
}

/* 目录侧栏 */
.article-side{min-width:0}
.toc{
  position:sticky;
  top:96px;
  padding:20px;
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
}
.toc-title{
  margin:0 0 12px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--muted);
}
.toc-list{list-style:none;margin:0;padding:0}
.toc-list li{margin-bottom:2px}
.toc-list a{
  display:block;
  padding:7px 10px;
  border-left:2px solid transparent;
  border-radius:0 8px 8px 0;
  font-size:13.5px;
  line-height:1.6;
  color:var(--muted);
  transition:color .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
}
.toc-list a:hover,
.toc-list a.active{
  color:var(--text);
  background:rgba(43,224,176,.08);
  border-left-color:var(--mint);
}
.toc-toggle{
  display:none;
  width:100%;
  align-items:center;justify-content:space-between;
  gap:8px;
  padding:12px 16px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(20,32,56,.55);
  color:var(--text);
  font-size:14px;font-weight:600;
  cursor:pointer;
}
.toc-toggle svg{width:16px;height:16px;color:var(--mint);transition:transform .25s var(--ease)}
.toc-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}

/* 空态 */
.empty-state{
  padding:56px 24px;
  text-align:center;
  border-radius:var(--r-lg);
  border:1px dashed rgba(120,200,255,.24);
  background:rgba(20,32,56,.35);
}
.empty-state svg{width:44px;height:44px;color:var(--blue);margin:0 auto 16px}
.empty-state h2{font-size:1.25rem;font-weight:600;color:#fff;margin:0 0 10px}
.empty-state p{color:var(--muted);font-size:14.5px;margin:0 0 22px}

/* 文末标签与操作 */
.article-foot{
  margin-top:48px;
  padding:26px;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
}
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-bottom:20px;
}
.tag-row .label{font-size:13px;color:var(--muted);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(77,163,255,.08);
  color:var(--text-2);
  font-size:12.5px;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.tag:hover{border-color:var(--focus);color:var(--mint)}
.foot-actions{display:flex;flex-wrap:wrap;gap:12px}
.copy-tip{
  font-size:13px;color:var(--mint);
  opacity:0;transition:opacity .25s var(--ease);
  align-self:center;
}
.copy-tip.show{opacity:1}

/* 按钮 */
.btn-primary,.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;
  border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;
  line-height:1.2;white-space:nowrap;
  cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease),color .22s var(--ease),filter .22s var(--ease);
}
.btn-primary{
  border:1px solid transparent;
  color:#04241C;
  background:linear-gradient(135deg,#45F3C6,#2BE0B0);
  box-shadow:var(--shadow-glow);
  text-decoration:none;
}
.btn-primary:hover{
  color:#04241C;
  transform:translateY(-2px);
  filter:brightness(1.05);
  box-shadow:0 0 0 1px rgba(43,224,176,.5),0 18px 40px -12px rgba(43,224,176,.5);
}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  border:1px solid rgba(120,200,255,.22);
  background:rgba(20,32,56,.55);
  color:var(--text);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  text-decoration:none;
}
.btn-secondary:hover{
  color:var(--mint);
  border-color:var(--focus);
  transform:translateY(-2px);
  box-shadow:0 14px 30px -18px rgba(43,224,176,.55);
}
.btn-secondary:active{transform:translateY(1px)}
.btn-secondary svg{width:16px;height:16px}

/* 相关推荐 */
.related{margin-top:72px}
.section-head{margin-bottom:28px}
.section-head h2{
  font-size:clamp(1.5rem,2.6vw,2rem);
  font-weight:700;
  line-height:1.3;
  margin:0 0 10px;
  color:#fff;
}
.section-head p{margin:0;color:var(--muted);font-size:14.5px}
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:var(--gap);
}
.rec-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  overflow:hidden;
  text-decoration:none;
  color:inherit;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.rec-card:hover{
  transform:translateY(-4px);
  border-color:rgba(43,224,176,.45);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 22px 44px -22px rgba(43,224,176,.4);
  color:inherit;
}
.rec-thumb{
  position:relative;
  aspect-ratio:16/9;
  background:linear-gradient(160deg,#122240,#060A14 72%);
  overflow:hidden;
}
.rec-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s var(--ease);
}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-body{padding:18px 20px 20px}
.rec-body h3{
  margin:0 0 8px;
  font-size:1.0625rem;
  font-weight:600;
  line-height:1.45;
  color:#fff;
}
.rec-body p{
  margin:0 0 14px;
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rec-meta{
  display:flex;align-items:center;gap:10px;
  font-size:12.5px;color:var(--muted);
}
.rec-meta .arrow{margin-left:auto;color:var(--mint);display:inline-flex}
.rec-meta .arrow svg{width:16px;height:16px}

/* 返回列表 */
.back-row{margin-top:40px;display:flex;flex-wrap:wrap;gap:12px}

/* 页脚 */
.site-footer{
  border-top:1px solid var(--divider);
  background:linear-gradient(180deg,rgba(11,18,34,.6),rgba(6,10,20,.95));
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:64px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
  margin:0 0 20px;
  max-width:340px;
}
.footer-brand .btn-secondary{min-height:40px;padding:0 20px;font-size:13.5px}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin:0 0 16px;
  letter-spacing:.02em;
}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:10px}
.footer-col a{
  color:var(--muted);
  font-size:14px;
  transition:color .22s var(--ease);
}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:22px;
  border-top:1px solid var(--divider);
  font-size:13px;
  color:var(--muted);
}
.footer-bottom .tech{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* 回到顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  background:rgba(20,32,56,.7);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--text);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s,border-color .22s var(--ease),color .22s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--focus);color:var(--mint)}
.to-top svg{width:18px;height:18px}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .container{padding:0 28px}
  .read-layout{grid-template-columns:minmax(0,1fr) 216px;gap:40px}
  .nav-links{gap:22px}
}
@media (max-width:991px){
  .container{padding:0 24px}
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 0;gap:12px}
  .header-sep,.nav-search{display:none}
  .icon-btn{display:inline-flex;margin-left:auto}
  .nav-links{
    order:3;flex:0 0 100%;width:100%;
    margin:0;gap:22px;
    overflow-x:auto;
    padding:10px 0 6px;
    border-top:1px solid var(--divider);
    scrollbar-width:none;
    -ms-overflow-style:none;
  }
  .nav-links::-webkit-scrollbar{height:0;display:none}
  .nav-links a{flex:0 0 auto;font-size:14px}
  .site-main{padding-bottom:72px}
  .article-hero{padding-top:32px}
  .article-cover{margin-bottom:36px}
  .article-cover img{aspect-ratio:16/9}
  .read-layout{grid-template-columns:minmax(0,1fr);gap:20px}
  .article-side{order:-1}
  .toc{position:static;padding:0;background:none;border:0;box-shadow:none;backdrop-filter:none;-webkit-backdrop-filter:none}
  .toc-title{display:none}
  .toc-list{
    display:none;
    margin-top:10px;
    padding:12px;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    background:rgba(20,32,56,.5);
  }
  .toc.open .toc-list{display:block}
  .toc-toggle{display:inline-flex}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .article-title{font-size:clamp(1.75rem,7vw,2.2rem)}
  .article-meta .meta-share{margin-left:0}
  .article-body{font-size:15.5px}
  .article-body h2{margin-top:32px}
  .article-foot{padding:22px 18px}
  .foot-actions .btn-primary,.foot-actions .btn-secondary{flex:1 1 100%}
  .media-split{grid-template-columns:1fr}
}
@media (max-width:575px){
  .container{padding:0 20px}
  .brand-text{font-size:1rem}
  .brand-mark{width:26px;height:26px}
  .brand-tag{font-size:10px;padding:1px 6px}
  .article-hero{padding-top:24px}
  .article-cover{border-radius:var(--r-md)}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-row .btn-primary,.back-row .btn-secondary{flex:1 1 100%}
  .to-top{right:16px;bottom:16px;width:42px;height:42px}
}

/* roulang page: category1 */
:root{
  --bg:#060A14;
  --bg-2:#0B1222;
  --glass:rgba(20,32,56,.55);
  --glass-2:rgba(20,32,56,.75);
  --line:rgba(120,200,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --focus:rgba(43,224,176,.55);
  --mint:#2BE0B0;
  --mint-deep:#1FC79B;
  --blue:#4DA3FF;
  --orange:#FF7A45;
  --text:#E9F1FF;
  --muted:#8FA2C0;
  --err:#FF5C6C;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(43,224,176,.35), 0 14px 34px -12px rgba(43,224,176,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 88% 8%, rgba(43,224,176,.06), transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(255,122,69,.05), transparent 42%),
    linear-gradient(rgba(120,200,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,200,255,.035) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--mint);text-decoration:none;transition:color .22s var(--ease);}
a:hover{color:#61f0c8;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(43,224,176,.3);color:#fff;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(6,10,20,.78);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:76px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--text);
  font-weight:800;
  letter-spacing:-.01em;
  white-space:nowrap;
  flex-shrink:0;
}
.brand:hover{color:var(--text);}
.brand-mark{width:30px;height:30px;color:var(--mint);flex-shrink:0;}
.brand-text{font-size:19px;}
.brand-tag{
  margin-left:6px;
  font-size:11px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--mint);
  background:rgba(43,224,176,.12);
  border:1px solid rgba(43,224,176,.32);
  border-radius:var(--r-pill);
  padding:2px 9px;
  line-height:1.6;
}
.brand-divider{
  width:1px;
  height:26px;
  background:var(--line);
  flex-shrink:0;
}
.nav-search{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  width:100%;
  max-width:500px;
  height:44px;
  padding:0 8px 0 16px;
  background:rgba(11,18,34,.85);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.nav-search:focus-within{
  border-color:var(--focus);
  box-shadow:0 0 0 4px rgba(43,224,176,.12);
}
.nav-search svg{width:17px;height:17px;color:var(--muted);flex-shrink:0;}
.nav-search input{
  flex:1;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  color:var(--text);
  font-size:14px;
  outline:none;
}
.nav-search input::placeholder{color:#647691;}
.nav-search .search-go{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:32px;
  padding:0 16px;
  font-size:13px;
  font-weight:600;
  color:#04140f;
  background:linear-gradient(135deg,#2BE0B0,#1FC79B);
  border:0;
  border-radius:var(--r-pill);
  cursor:pointer;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease);
}
.nav-search .search-go:hover{transform:translateY(-1px);box-shadow:var(--shadow-glow);}
.search-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;
  height:42px;
  margin-left:auto;
  color:var(--text);
  background:rgba(20,32,56,.7);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  cursor:pointer;
}
.search-toggle svg{width:18px;height:18px;}
.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
  flex-shrink:0;
}
.nav-links a{
  position:relative;
  font-size:14.5px;
  font-weight:500;
  color:var(--muted);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:transparent;
  transition:background .22s var(--ease);
}
.nav-links a:hover{color:var(--text);}
.nav-links a.active{color:var(--mint);}
.nav-links a.active::after{background:var(--mint);}
.search-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(6,10,20,.96);
  padding:16px 0 18px;
}
.search-drawer.open{display:block;}
.drawer-search{
  display:flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 18px;
  background:rgba(11,18,34,.9);
  border:1px solid var(--line);
  border-radius:var(--r-md);
}
.drawer-search:focus-within{border-color:var(--focus);box-shadow:0 0 0 4px rgba(43,224,176,.1);}
.drawer-search svg{width:17px;height:17px;color:var(--muted);}
.drawer-search input{flex:1;height:100%;border:0;background:transparent;color:var(--text);font-size:15px;outline:none;}
.drawer-search input::placeholder{color:#647691;}
.hot-words{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-top:14px;
  font-size:13px;
  color:var(--muted);
}
.chip{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  font-size:12.5px;
  color:var(--muted);
  background:rgba(20,32,56,.7);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  cursor:pointer;
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.chip:hover{color:var(--mint);border-color:rgba(43,224,176,.4);background:rgba(43,224,176,.08);}

/* ---------- 通用组件 ---------- */
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.btn-mint{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 24px;
  font-size:15px;
  font-weight:600;
  color:#04140f;
  background:linear-gradient(135deg,#2BE0B0,#1FC79B);
  border:0;
  border-radius:var(--r-pill);
  box-shadow:0 10px 26px -14px rgba(43,224,176,.9);
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), filter .22s var(--ease);
}
.btn-mint:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow);filter:brightness(1.04);color:#04140f;}
.btn-mint:active{transform:translateY(1px);}
.btn-outline{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 24px;
  font-size:15px;
  font-weight:600;
  color:var(--text);
  background:rgba(20,32,56,.5);
  border:1px solid rgba(120,200,255,.24);
  border-radius:var(--r-pill);
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}
.btn-outline:hover{transform:translateY(-2px);border-color:var(--focus);background:rgba(43,224,176,.08);color:var(--text);}
.btn-outline:active{transform:translateY(1px);}
.badge-mint,.badge-orange{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  font-size:12px;
  line-height:1;
  border-radius:var(--r-pill);
  white-space:nowrap;
}
.badge-mint{color:var(--mint);background:rgba(43,224,176,.12);border:1px solid rgba(43,224,176,.28);}
.badge-orange{color:var(--orange);background:rgba(255,122,69,.12);border:1px solid rgba(255,122,69,.28);font-variant-numeric:tabular-nums;}
.section{padding:88px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{
  font-size:clamp(1.5rem,2.6vw,2rem);
  font-weight:700;
  line-height:1.3;
  margin:0 0 14px;
  color:var(--text);
}
.section-head p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.85;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--mint);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--mint);opacity:.7;}

/* ---------- 面包屑 ---------- */
.crumbs{
  padding:22px 0 0;
  font-size:13px;
  color:var(--muted);
}
.crumbs ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--mint);}
.crumbs .sep{color:rgba(143,162,192,.5);display:inline-flex;}
.crumbs .sep svg{width:12px;height:12px;}
.crumbs [aria-current="page"]{color:var(--text);}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  margin-top:22px;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  min-height:270px;
  display:flex;
  align-items:center;
  background-color:#0B1222;
  background-image:
    linear-gradient(100deg, rgba(6,10,20,.94) 12%, rgba(6,10,20,.68) 52%, rgba(6,10,20,.42) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  box-shadow:var(--shadow-card);
}
.cat-hero-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:flex-end;
  gap:40px;
  width:100%;
  padding:44px 44px;
}
.cat-hero-copy{flex:1;min-width:0;}
.cat-hero h1{
  font-size:clamp(1.75rem,3.4vw,2.6rem);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
  margin:0 0 14px;
}
.cat-hero p{
  margin:0;
  max-width:560px;
  color:#C4D3EA;
  font-size:15px;
  line-height:1.85;
}
.cat-stats{
  display:flex;
  gap:12px;
  flex-shrink:0;
}
.stat{
  min-width:104px;
  padding:14px 16px;
  text-align:center;
  background:rgba(11,18,34,.72);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  backdrop-filter:blur(10px);
}
.stat b{
  display:block;
  font-size:24px;
  font-weight:800;
  line-height:1.2;
  color:var(--mint);
  font-variant-numeric:tabular-nums;
}
.stat span{display:block;margin-top:4px;font-size:12px;color:var(--muted);white-space:nowrap;}

/* ---------- 价值卡 ---------- */
.value-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.value-card{padding:28px 26px;transition:transform .22s var(--ease),border-color .22s var(--ease);}
.value-card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.42);}
.value-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  margin-bottom:18px;
  color:var(--mint);
  background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.26);
  border-radius:var(--r-sm);
}
.value-icon svg{width:22px;height:22px;}
.value-card h3{font-size:1.125rem;font-weight:600;margin:0 0 10px;}
.value-card p{margin:0;font-size:14.5px;line-height:1.85;color:var(--muted);}

/* ---------- 场景卡网格 ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.scene-card{
  display:flex;
  flex-direction:column;
  overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.scene-card:hover{
  transform:translateY(-4px);
  border-color:rgba(43,224,176,.45);
  box-shadow:var(--shadow-card),0 0 0 1px rgba(43,224,176,.25);
}
.scene-thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,#0d1730,#131f3a);
  background-image:linear-gradient(rgba(120,200,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,200,255,.06) 1px,transparent 1px);
  background-size:26px 26px,26px 26px;
}
.scene-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-body{padding:20px 22px 22px;flex:1;display:flex;flex-direction:column;}
.scene-body h3{
  font-size:1.0625rem;
  font-weight:600;
  line-height:1.5;
  margin:0 0 10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.scene-body p{
  margin:0 0 18px;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.scene-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  gap:8px;
  padding-top:14px;
  border-top:1px solid var(--line-soft);
}
.scene-meta .arrow{margin-left:auto;color:var(--muted);display:inline-flex;}
.scene-meta .arrow svg{width:16px;height:16px;transition:transform .22s var(--ease),color .22s var(--ease);}
.scene-card:hover .arrow svg{color:var(--mint);transform:translateX(3px);}

/* ---------- 流程 ---------- */
.step-wrap{
  padding:40px 36px;
}
.step-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:step;
}
.step{
  position:relative;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.step-num{
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
  margin-bottom:10px;
}
.step h3{font-size:1.0625rem;font-weight:600;margin:0 0 10px;line-height:1.5;}
.step p{margin:0;font-size:14px;line-height:1.85;color:var(--muted);}

/* ---------- 核对清单 ---------- */
.check-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.check-row{
  display:grid;
  grid-template-columns:1.05fr 1.45fr auto;
  align-items:center;
  gap:24px;
  padding:20px 24px;
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.check-row:hover{
  transform:translateY(-2px);
  border-color:rgba(43,224,176,.4);
  background:rgba(26,42,70,.6);
}
.check-row .symptom{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
}
.check-row .symptom svg{width:18px;height:18px;color:var(--orange);flex-shrink:0;}
.check-row .fix{
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.check-row .tag{justify-self:end;}

/* ---------- FAQ ---------- */
.acc .accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-md) !important;
  margin-bottom:12px;
  overflow:hidden;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
}
.acc .accordion-header{margin:0;border:0;}
.acc .accordion-button{
  width:100%;
  height:56px;
  padding:0 22px;
  display:flex;
  align-items:center;
  gap:12px;
  font-size:15.5px;
  font-weight:600;
  color:var(--text);
  background:transparent;
  border:0;
  border-radius:0 !important;
  box-shadow:none !important;
}
.acc .accordion-button:not(.collapsed){
  color:var(--mint);
  background:rgba(43,224,176,.06);
}
.acc .accordion-button:hover{color:var(--mint);}
.acc .accordion-button:focus{box-shadow:none;outline:none;}
.acc .accordion-button:focus-visible{outline:2px solid var(--mint);outline-offset:-3px;}
.acc .accordion-button::after{
  content:"";
  width:11px;
  height:11px;
  margin-left:auto;
  flex-shrink:0;
  border-right:2px solid currentColor;
  border-bottom:2px solid currentColor;
  background-image:none;
  transform:rotate(45deg);
  transition:transform .28s var(--ease);
  opacity:.85;
}
.acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
.acc .accordion-body{
  padding:4px 22px 22px;
  font-size:14.5px;
  line-height:1.9;
  color:var(--muted);
  border-top:1px solid rgba(43,224,176,.22);
}

/* ---------- 相关分类 ---------- */
.rel-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.rel-card{
  display:flex;
  align-items:center;
  gap:20px;
  padding:26px 28px;
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);border-color:rgba(43,224,176,.45);color:inherit;}
.rel-card .rel-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:52px;
  height:52px;
  flex-shrink:0;
  color:var(--blue);
  background:rgba(77,163,255,.1);
  border:1px solid rgba(77,163,255,.26);
  border-radius:var(--r-sm);
}
.rel-card .rel-icon svg{width:24px;height:24px;}
.rel-card h3{font-size:1.0625rem;font-weight:600;margin:0 0 6px;color:var(--text);}
.rel-card p{margin:0;font-size:14px;color:var(--muted);line-height:1.8;}
.rel-card .arrow{margin-left:auto;color:var(--muted);flex-shrink:0;display:inline-flex;}
.rel-card .arrow svg{width:18px;height:18px;transition:transform .22s var(--ease),color .22s var(--ease);}
.rel-card:hover .arrow svg{color:var(--mint);transform:translateX(4px);}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:38px 40px;
  background:linear-gradient(120deg,rgba(43,224,176,.1),rgba(20,32,56,.62) 48%,rgba(255,122,69,.08));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-band h2{font-size:clamp(1.25rem,2.2vw,1.65rem);font-weight:700;margin:0 0 8px;line-height:1.35;}
.cta-band p{margin:0;font-size:14.5px;color:var(--muted);max-width:560px;}
.cta-actions{display:flex;gap:12px;flex-shrink:0;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:88px;
  padding:64px 0 28px;
  background:rgba(8,13,24,.86);
  border-top:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand p{
  margin:16px 0 20px;
  font-size:13.5px;
  line-height:1.9;
  color:var(--muted);
  max-width:340px;
}
.footer-brand .btn-secondary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:38px;
  padding:0 20px;
  font-size:13.5px;
  font-weight:600;
  color:var(--text);
  background:rgba(20,32,56,.6);
  border:1px solid rgba(120,200,255,.24);
  border-radius:var(--r-pill);
  cursor:pointer;
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.footer-brand .btn-secondary:hover{transform:translateY(-2px);border-color:var(--focus);background:rgba(43,224,176,.08);}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:#A9BBD6;
  margin:0 0 16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:13.5px;color:var(--muted);}
.footer-col a:hover{color:var(--mint);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid var(--line-soft);
  font-size:12.5px;
  color:#6F819B;
}
.footer-bottom .tech{font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:1020;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  color:var(--text);
  background:rgba(20,32,56,.8);
  border:1px solid var(--line);
  border-radius:50%;
  backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),border-color .22s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{border-color:var(--focus);color:var(--mint);}
.to-top svg{width:18px;height:18px;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .cat-hero-inner{padding:38px 32px;gap:28px;}
  .stat{min-width:92px;padding:12px 12px;}
  .stat b{font-size:21px;}
  .nav-links{gap:20px;}
  .nav-search{max-width:380px;}
}
@media (max-width:991.98px){
  .container{padding-left:24px;padding-right:24px;}
  .header-inner{height:auto;flex-wrap:wrap;padding-top:12px;gap:14px;}
  .brand-divider,.nav-search{display:none;}
  .search-toggle{display:inline-flex;}
  .nav-links{
    order:3;
    width:100%;
    margin-left:0;
    gap:22px;
    overflow-x:auto;
    border-top:1px solid var(--line);
    padding:4px 0;
    scrollbar-width:none;
  }
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-links a{display:inline-flex;align-items:center;height:42px;font-size:14px;}
  .section{padding:64px 0;}
  .cat-hero-inner{flex-direction:column;align-items:flex-start;padding:32px 26px;gap:22px;}
  .cat-stats{width:100%;gap:10px;}
  .stat{flex:1;min-width:0;}
  .value-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .scene-grid{grid-template-columns:repeat(2,1fr);gap:16px;}
  .step-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .step-wrap{padding:30px 24px;}
  .check-row{grid-template-columns:1fr;gap:10px;padding:18px 20px;}
  .check-row .tag{justify-self:start;}
  .rel-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 26px;gap:22px;}
  .cta-actions{width:100%;flex-wrap:wrap;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{padding:52px 0 24px;margin-top:64px;}
}
@media (max-width:575.98px){
  .container{padding-left:20px;padding-right:20px;}
  body{font-size:15px;}
  .brand-text{font-size:17px;}
  .brand-mark{width:26px;height:26px;}
  .cat-hero h1{font-size:1.6rem;}
  .cat-hero p{font-size:14px;}
  .cat-hero-inner{padding:28px 20px;}
  .cat-stats{flex-wrap:wrap;}
  .stat{flex:1 1 30%;min-width:88px;padding:10px 8px;}
  .stat b{font-size:19px;}
  .stat span{font-size:11px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:28px;}
  .value-grid,.scene-grid,.step-grid{grid-template-columns:1fr;}
  .btn-mint,.btn-outline{width:100%;}
  .cta-actions{flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
}

/* roulang page: category2 */
:root{
  --bg:#060A14;
  --panel:#0B1222;
  --glass:rgba(20,32,56,0.55);
  --glass-soft:rgba(11,18,34,0.78);
  --line:rgba(120,200,255,0.14);
  --line-focus:rgba(43,224,176,0.55);
  --mint:#2BE0B0;
  --blue:#4DA3FF;
  --orange:#FF7A45;
  --text:#E9F1FF;
  --muted:#8FA2C0;
  --divider:rgba(255,255,255,0.08);
  --danger:#FF5C6C;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.7);
  --shadow-glow:0 0 0 1px rgba(43,224,176,.35),0 14px 34px -12px rgba(43,224,176,.35);
  --ease:cubic-bezier(.22,.61,.36,1);
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:64px;--s9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:104px;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.9;color:var(--text);
  background:
    radial-gradient(900px 520px at 88% 4%, rgba(43,224,176,.07), transparent 65%),
    radial-gradient(760px 520px at 4% 98%, rgba(255,122,69,.05), transparent 62%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  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:64px 64px;
  -webkit-mask-image:radial-gradient(1200px 800px at 50% 30%,#000 20%,transparent 88%);
  mask-image:radial-gradient(1200px 800px at 50% 30%,#000 20%,transparent 88%);
  opacity:.6;
}
img{max-width:100%;display:block}
a{color:var(--mint);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:#57f0c6}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;position:relative;z-index:1}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,10,20,.76);
  -webkit-backdrop-filter:blur(18px);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:76px}
.brand{display:inline-flex;align-items:center;gap:8px;font-weight:800;color:var(--text);letter-spacing:.01em;flex:none}
.brand:hover{color:var(--text)}
.brand-mark{width:30px;height:30px;color:var(--mint);flex:none}
.brand-text{font-size:1.125rem;line-height:1}
.brand-tag{
  margin-left:-2px;font-size:11px;font-weight:600;line-height:1.6;
  color:var(--mint);background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.38);border-radius:6px;
  padding:1px 6px;letter-spacing:.06em;white-space:nowrap;
}
.header-divider{width:1px;height:26px;background:var(--divider);flex:none}
.nav-search{
  flex:1 1 420px;max-width:520px;height:44px;
  display:flex;align-items:center;gap:10px;
  padding:0 16px;border-radius:var(--r-pill);
  background:rgba(11,18,34,.82);
  border:1px solid var(--line);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.nav-search:focus-within{border-color:var(--line-focus);box-shadow:0 0 0 3px rgba(43,224,176,.16);background:rgba(11,18,34,.95)}
.nav-search svg{width:17px;height:17px;color:var(--muted);flex:none}
.nav-search input{
  flex:1;min-width:0;height:100%;border:0;background:transparent;color:var(--text);
  font-size:14px;line-height:1.4;outline:none;
}
.nav-search input::placeholder{color:#63769a}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-links a{
  position:relative;color:var(--muted);font-size:15px;font-weight:500;
  padding:6px 2px;white-space:nowrap;transition:color .22s var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--mint);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{transform:scaleX(1)}
.mobile-search-btn{
  display:none;width:40px;height:40px;border-radius:var(--r-pill);
  background:rgba(11,18,34,.9);border:1px solid var(--line);color:var(--text);
  align-items:center;justify-content:center;flex:none;margin-left:auto;
}
.mobile-search-btn svg{width:18px;height:18px}
.mobile-drawer{
  display:none;padding:14px 0 16px;border-top:1px solid var(--divider);
}
.mobile-drawer.open{display:block}
.mobile-drawer .nav-search{max-width:none;width:100%;height:48px}
.drawer-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.drawer-chips span{
  font-size:12px;color:var(--muted);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:3px 12px;background:rgba(11,18,34,.7);
}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:26px 0 0;font-size:13px;color:var(--muted);
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb svg{width:12px;height:12px;color:#43566f;flex:none}
.breadcrumb .current{color:var(--text)}

/* ---------- layout ---------- */
.page-main{padding-bottom:96px}
.layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;align-items:start;margin-top:32px}

/* ---------- side index ---------- */
.side-index{
  position:sticky;top:104px;
  padding:22px 18px;
  border-radius:var(--r-lg);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.side-title{
  font-size:13px;letter-spacing:.14em;color:var(--muted);
  text-transform:uppercase;font-variant-numeric:tabular-nums;
  padding:0 6px 12px;border-bottom:1px solid var(--divider);margin-bottom:12px;
}
.anchor-list{display:flex;flex-direction:column;gap:2px}
.anchor-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:var(--r-sm);
  border-left:2px solid transparent;
  color:var(--muted);font-size:14px;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.anchor-link span{font-size:12px;font-variant-numeric:tabular-nums;color:#5d7093;letter-spacing:.04em}
.anchor-link:hover{background:rgba(43,224,176,.07);color:var(--text)}
.anchor-link.active{
  background:rgba(43,224,176,.1);color:var(--mint);
  border-left-color:var(--mint);
}
.anchor-link.active span{color:rgba(43,224,176,.75)}
.side-note{
  margin-top:16px;padding:14px;border-radius:var(--r-md);
  background:rgba(255,122,69,.08);border:1px solid rgba(255,122,69,.24);
  font-size:12.5px;line-height:1.7;color:#f3b79c;
}
.side-note strong{color:var(--orange);font-weight:600}

/* ---------- content head ---------- */
.content-col{min-width:0}
.page-head h1{
  font-size:clamp(2rem,4vw,3rem);line-height:1.2;font-weight:800;letter-spacing:-.01em;
  margin-bottom:18px;
}
.page-head h1 em{font-style:normal;color:var(--mint)}
.page-lead{color:var(--muted);font-size:16px;line-height:1.9;max-width:760px}
.head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.pill{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;white-space:nowrap;
}
.pill-mint{color:var(--mint);background:rgba(43,224,176,.1);border-color:rgba(43,224,176,.28)}
.pill-orange{color:var(--orange);background:rgba(255,122,69,.1);border-color:rgba(255,122,69,.28)}
.pill-muted{color:var(--muted);background:rgba(255,255,255,.04);border-color:var(--divider)}
.pill b{font-variant-numeric:tabular-nums;font-weight:700}

.page-banner{
  position:relative;margin:28px 0 0;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  background:linear-gradient(135deg,#0d1730,#0a1224);
}
.page-banner img{width:100%;height:250px;object-fit:cover;opacity:.82}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,10,20,.88) 8%,rgba(6,10,20,.35) 62%,rgba(6,10,20,.15));
}
.banner-caption{
  position:absolute;left:26px;bottom:22px;z-index:2;max-width:520px;
}
.banner-caption .cap-tag{
  display:inline-block;font-size:11px;letter-spacing:.14em;color:var(--orange);
  background:rgba(255,122,69,.14);border:1px solid rgba(255,122,69,.32);
  border-radius:6px;padding:2px 8px;margin-bottom:10px;
}
.banner-caption p{font-size:14px;color:#cfdcf3;line-height:1.8}

/* ---------- search status ---------- */
.search-status{
  margin:24px 0 0;padding:12px 18px;border-radius:var(--r-md);
  background:rgba(43,224,176,.08);border:1px solid rgba(43,224,176,.26);
  font-size:14px;color:#9ff0da;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.search-status.empty{background:rgba(255,92,108,.08);border-color:rgba(255,92,108,.3);color:#ffb3ba}
.search-status button{
  margin-left:auto;background:transparent;border:1px solid currentColor;color:inherit;
  border-radius:var(--r-pill);font-size:12px;padding:2px 12px;line-height:1.8;
  transition:background .22s var(--ease);
}
.search-status button:hover{background:rgba(255,255,255,.08)}

/* ---------- index groups ---------- */
.idx-group{margin-top:52px}
.idx-group h2{
  display:flex;align-items:center;gap:12px;
  font-size:clamp(1.35rem,2.2vw,1.65rem);font-weight:700;line-height:1.3;
  margin-bottom:6px;
}
.idx-group h2::before{
  content:"";width:4px;height:22px;border-radius:2px;background:var(--mint);flex:none;
  box-shadow:0 0 14px rgba(43,224,176,.6);
}
.group-sub{color:var(--muted);font-size:13.5px;margin-bottom:14px;padding-left:16px}
.idx-list{border-top:1px solid var(--line)}
.idx-row{
  display:grid;grid-template-columns:52px minmax(0,1fr) auto;
  gap:18px;align-items:flex-start;
  min-height:88px;padding:20px 16px;
  border-bottom:1px solid var(--divider);
  border-radius:2px;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.idx-row:hover{background:rgba(43,224,176,.06);transform:translateX(2px)}
.idx-no{
  font-variant-numeric:tabular-nums;font-size:15px;font-weight:700;letter-spacing:.06em;
  color:var(--orange);line-height:1.6;padding-top:2px;
}
.idx-title{font-size:1.0625rem;font-weight:600;line-height:1.6;color:var(--text)}
.idx-desc{font-size:13.5px;line-height:1.8;color:var(--muted);margin-top:6px}
.idx-tail{display:flex;align-items:center;gap:12px;padding-top:4px;flex:none}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;
  color:var(--mint);background:rgba(43,224,176,.1);border:1px solid rgba(43,224,176,.26);
  white-space:nowrap;
}
.tag-orange{color:var(--orange);background:rgba(255,122,69,.1);border-color:rgba(255,122,69,.3)}
.tag-blue{color:#8fc4ff;background:rgba(77,163,255,.1);border-color:rgba(77,163,255,.3)}
.idx-arrow{width:18px;height:18px;color:#4d637f;flex:none;transition:color .22s var(--ease),transform .22s var(--ease)}
.idx-row:hover .idx-arrow{color:var(--mint);transform:translateX(3px)}

/* ---------- related ---------- */
.relate{margin-top:72px}
.section-title{
  display:flex;align-items:center;gap:12px;font-size:clamp(1.35rem,2.2vw,1.6rem);
  font-weight:700;line-height:1.3;margin-bottom:8px;
}
.section-title::before{content:"";width:4px;height:20px;border-radius:2px;background:var(--blue);flex:none}
.section-desc{color:var(--muted);font-size:13.5px;margin-bottom:22px;padding-left:16px}
.relate-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.relate-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  color:var(--text);
}
.relate-card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.5);box-shadow:var(--shadow-glow);color:var(--text)}
.relate-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,#0d1730,#0a1224)}
.relate-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.relate-card:hover .relate-thumb img{transform:scale(1.04)}
.relate-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.relate-body h3{font-size:1rem;font-weight:600;line-height:1.6}
.relate-body p{font-size:13px;line-height:1.75;color:var(--muted)}
.relate-foot{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:6px;font-size:12px;color:#6f83a4}
.relate-foot svg{width:14px;height:14px;color:var(--mint)}

/* ---------- CTA band ---------- */
.cta-band{
  margin-top:64px;padding:36px 40px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(43,224,176,.12),rgba(20,32,56,.6) 60%,rgba(255,122,69,.1));
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:1.35rem;font-weight:700;line-height:1.4;margin-bottom:8px}
.cta-band p{color:var(--muted);font-size:14px;max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary,.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;line-height:1;white-space:nowrap;cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease);
  border:1px solid transparent;
}
.btn-primary{
  color:#032019;
  background:linear-gradient(135deg,#57f0c6,#2BE0B0 70%);
  box-shadow:0 0 0 1px rgba(43,224,176,.35),0 14px 34px -14px rgba(43,224,176,.6);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(43,224,176,.55),0 20px 40px -14px rgba(43,224,176,.75);color:#032019}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  color:var(--text);background:rgba(20,32,56,.6);
  border-color:rgba(120,200,255,.28);
}
.btn-secondary:hover{transform:translateY(-2px);border-color:var(--line-focus);background:rgba(43,224,176,.1);color:var(--text)}
.btn-secondary:active{transform:translateY(1px)}
.btn-secondary svg{width:16px;height:16px}
.btn-lg{height:52px;padding:0 30px;font-size:15.5px}

/* ---------- FAQ ---------- */
.faq-block{margin-top:72px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item.open{border-color:rgba(43,224,176,.42)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;background:transparent;border:0;
  color:var(--text);font-size:15px;font-weight:600;line-height:1.6;text-align:left;cursor:pointer;
}
.faq-q:hover{color:var(--mint)}
.faq-icon{
  width:26px;height:26px;flex:none;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(120,200,255,.28);color:var(--mint);
  transition:transform .3s var(--ease),background .22s var(--ease);
}
.faq-icon svg{width:13px;height:13px}
.faq-item.open .faq-icon{transform:rotate(180deg);background:rgba(43,224,176,.14)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .34s var(--ease)}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden}
.faq-a p{
  padding:0 20px 18px;font-size:14px;line-height:1.9;color:var(--muted);
  border-top:1px solid rgba(43,224,176,.22);margin-top:0;padding-top:16px;
}

/* ---------- toast ---------- */
.toast-note{
  position:fixed;left:50%;bottom:32px;transform:translate(-50%,16px);
  background:rgba(11,18,34,.96);border:1px solid rgba(43,224,176,.45);
  color:var(--mint);font-size:13.5px;padding:10px 20px;border-radius:var(--r-pill);
  box-shadow:var(--shadow-card);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease);z-index:200;
}
.toast-note.show{opacity:1;transform:translate(-50%,0)}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;z-index:90;
  background:rgba(20,32,56,.82);border:1px solid var(--line);color:var(--text);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),border-color .22s var(--ease);
  cursor:pointer;box-shadow:var(--shadow-card);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{border-color:var(--line-focus);color:var(--mint)}
.to-top svg{width:18px;height:18px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:96px;padding-top:64px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,18,34,.6),rgba(6,10,20,.95));
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{color:var(--muted);font-size:13.5px;line-height:1.9;margin:16px 0 20px;max-width:320px}
.footer-brand .btn-secondary{height:40px;padding:0 20px;font-size:13.5px}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--text);
  margin-bottom:16px;text-transform:uppercase;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--muted);font-size:13.5px}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--divider);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:#65779a;
}
.footer-bottom .tech{font-variant-numeric:tabular-nums;letter-spacing:.04em}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .layout{grid-template-columns:210px minmax(0,1fr);gap:36px}
  .nav-search{max-width:400px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .footer-col:last-child{grid-column:auto}
}
@media (max-width:991px){
  .container{padding:0 24px}
  .nav-search{display:none}
  .header-divider{display:none}
  .mobile-search-btn{display:inline-flex}
  .header-inner{min-height:68px;gap:14px}
  .nav-links{
    gap:18px;overflow-x:auto;flex-wrap:nowrap;
    padding-bottom:2px;margin-left:0;flex:1;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .nav-links::-webkit-scrollbar{display:none}
  .header-inner{flex-wrap:wrap;padding-bottom:10px}
  .header-inner > .nav-links{order:3;flex-basis:100%;border-top:1px solid var(--divider);padding-top:10px}
  .layout{grid-template-columns:1fr;gap:8px;margin-top:24px}
  .side-index{position:static;padding:16px;top:auto}
  .anchor-list{flex-direction:row;overflow-x:auto;gap:8px;padding-bottom:4px;scrollbar-width:none}
  .anchor-list::-webkit-scrollbar{display:none}
  .anchor-link{border-left:0;border:1px solid var(--line);white-space:nowrap;border-radius:var(--r-pill);padding:8px 14px}
  .anchor-link.active{border-color:rgba(43,224,176,.5)}
  .side-note{display:none}
  .side-title{padding-bottom:10px;margin-bottom:10px}
  .relate-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
  .page-banner img{height:200px}
  .cta-band{padding:28px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .page-main{padding-bottom:64px}
  .breadcrumb{padding-top:18px;font-size:12px}
  .page-head h1{font-size:1.75rem}
  .page-lead{font-size:14.5px}
  .idx-group{margin-top:40px}
  .idx-row{grid-template-columns:40px minmax(0,1fr);gap:12px;padding:16px 10px;min-height:0}
  .idx-tail{grid-column:2;padding-top:8px}
  .idx-title{font-size:1rem}
  .idx-desc{font-size:13px}
  .relate-grid{grid-template-columns:1fr}
  .banner-caption{left:18px;bottom:16px;right:18px}
  .banner-caption p{font-size:13px}
  .page-banner img{height:170px}
  .cta-band{flex-direction:column;align-items:flex-start;gap:20px}
  .cta-actions{width:100%}
  .cta-actions .btn-primary,.cta-actions .btn-secondary{flex:1 1 100%}
  .faq-q{font-size:14px;padding:12px 16px}
  .faq-a p{padding-left:16px;padding-right:16px;font-size:13.5px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:8px}
  .footer-bottom{flex-direction:column;gap:6px;margin-top:40px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:575px){
  .container{padding:0 18px}
  .brand-text{font-size:1rem}
  .brand-mark{width:26px;height:26px}
  .brand-tag{font-size:10px;padding:1px 5px}
  .page-head h1{font-size:1.55rem}
  .pill{font-size:11px;height:24px;padding:0 10px}
  .idx-no{font-size:13.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}