/* roulang page: index */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1220;
  --bg-2:#101A2C;
  --brand:#3D7BFF;
  --brand-soft:rgba(61,123,255,.16);
  --accent:#22D3EE;
  --accent-soft:rgba(34,211,238,.14);
  --tx-1:#E8F0FF;
  --tx-2:#9AAEC9;
  --tx-3:#64789A;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(34,211,238,.35);
  --ok:#3FB98A;
  --warn:#E0A63C;
  --err:#E06A6A;
  --glass:rgba(20,32,52,.55);
  --glass-hi:rgba(255,255,255,.06);
  --r-sm:12px;
  --r-md:16px;
  --r-lg:18px;
  --r-xl:22px;
  --shadow:0 24px 60px -34px rgba(0,0,0,.95);
  --shadow-soft:0 12px 30px -20px rgba(0,0,0,.9);
  --nav-w:232px;
  --maxw:1200px;
  --ease:cubic-bezier(.32,.72,.35,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(61,123,255,.35);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

/* ---------- 侧栏导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  display:flex;flex-direction:column;gap:26px;
  padding:26px 16px 20px;
  background:rgba(11,18,32,.86);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  z-index:80;
}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  background:linear-gradient(140deg,var(--brand),var(--accent));
  box-shadow:0 0 18px -4px rgba(61,123,255,.9);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;border-radius:3px;
  border:1.5px solid rgba(7,12,20,.72);
  transform:rotate(45deg);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.01em;line-height:1.3}
.nav-group{display:flex;flex-direction:column;gap:4px;flex:1}
.nav-label{
  font-size:12px;letter-spacing:.14em;color:var(--tx-3);
  padding:0 10px;margin-bottom:6px;text-transform:uppercase;
}
.nav-link{
  position:relative;display:flex;align-items:center;gap:10px;
  min-height:44px;padding:0 12px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--tx-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-ic{
  width:16px;height:16px;flex:0 0 16px;border-radius:5px;
  border:1px solid rgba(120,170,255,.32);
  background:rgba(61,123,255,.1);
  transition:all .2s var(--ease);
}
.nav-link:hover{background:rgba(120,170,255,.08);color:var(--tx-1)}
.nav-link:hover .nav-ic{border-color:var(--line-strong);background:rgba(34,211,238,.16)}
.nav-link.active{background:var(--glass);color:var(--tx-1)}
.nav-link.active .nav-ic{background:var(--brand);border-color:var(--brand);box-shadow:0 0 12px -2px rgba(61,123,255,.9)}
.nav-link.active::before{
  content:"";position:absolute;left:0;top:11px;bottom:11px;width:3px;border-radius:0 3px 3px 0;
  background:var(--accent);box-shadow:0 0 12px var(--accent);
}
.side-bottom{display:flex;flex-direction:column;gap:12px;padding-top:16px;border-top:1px solid var(--line)}
.side-bottom .btn{width:100%}
.side-meta{font-size:12px;line-height:1.7;color:var(--tx-3);text-align:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .2s var(--ease);
  border:1px solid transparent;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:linear-gradient(135deg,#4A86FF,#22D3EE 130%);
  color:#04101F;
  box-shadow:0 10px 26px -12px rgba(61,123,255,.95),0 0 0 1px rgba(34,211,238,.35) inset;
}
.btn-primary:hover{
  box-shadow:0 16px 34px -12px rgba(61,123,255,1),0 0 0 1px rgba(34,211,238,.55) inset;
  transform:translateY(-2px);
}
.btn-glass{
  background:var(--glass);
  border-color:var(--line);
  color:var(--tx-1);
  backdrop-filter:blur(12px);
}
.btn-glass:hover{border-color:var(--line-strong);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-soft)}
.btn-ghost{border-color:rgba(120,170,255,.28);color:var(--tx-2)}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--tx-1)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--brand);
  transition:color .2s var(--ease),gap .2s var(--ease);
}
.link-more:hover{color:var(--accent);gap:12px}

/* ---------- 顶部条 + 抽屉 ---------- */
.topbar{
  display:none;position:sticky;top:0;z-index:90;
  align-items:center;justify-content:space-between;gap:12px;
  padding:12px 18px;
  background:rgba(9,15,26,.92);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.topbar-brand{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700}
.topbar-brand .brand-mark{width:26px;height:26px;flex:0 0 26px;border-radius:8px}
.topbar-brand .brand-mark::after{inset:7px}
.burger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:var(--glass);
}
.burger span{display:block;width:18px;height:1.5px;background:var(--tx-1);border-radius:2px;transition:.2s var(--ease)}
.burger:hover span{background:var(--accent)}
.scrim{
  position:fixed;inset:0;background:rgba(4,8,15,.66);
  backdrop-filter:blur(2px);z-index:95;opacity:0;pointer-events:none;transition:opacity .24s var(--ease);
}
.scrim.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;left:0;bottom:0;width:78vw;max-width:320px;
  z-index:96;display:flex;flex-direction:column;gap:18px;
  padding:20px 18px 26px;
  background:rgba(11,18,32,.98);
  border-right:1px solid var(--line);
  transform:translateX(-102%);
  transition:transform .28s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--tx-2);
}
.drawer-close:hover{color:var(--tx-1);border-color:var(--line-strong)}
.drawer-nav{display:flex;flex-direction:column;gap:6px}
.drawer-nav .nav-link{min-height:48px;font-size:16px}
.drawer-cta{width:100%;margin-top:auto}

/* ---------- 页面主体 ---------- */
.page{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}
main{flex:1}
.section{padding:76px 0}
.section + .section{padding-top:0}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-title{font-size:28px;line-height:1.32;font-weight:700;letter-spacing:.01em}
.section-desc{font-size:15px;color:var(--tx-2);margin-top:8px;max-width:640px;line-height:1.8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);
  font-size:12.5px;font-weight:600;letter-spacing:.06em;
  border:1px solid rgba(34,211,238,.28);
}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}

/* ---------- Hero ---------- */
.hero{
  position:relative;margin-top:32px;
  border-radius:var(--r-xl);overflow:hidden;
  border:1px solid var(--line);
  background:
    linear-gradient(112deg,rgba(7,12,20,.95) 12%,rgba(11,18,32,.82) 58%,rgba(16,26,44,.72) 100%),
    url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  box-shadow:var(--shadow);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(120,170,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.5) 1px,transparent 1px);
  background-size:52px 52px;
  opacity:.05;
  mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 78% 18%,#000 0%,transparent 72%);
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);
  gap:44px;align-items:center;
  padding:56px 48px 52px;
}
.hero h1{
  font-size:42px;line-height:1.28;font-weight:800;letter-spacing:.005em;
  margin:18px 0 0;
}
.hero h1 em{font-style:normal;color:var(--accent);text-shadow:0 0 26px rgba(34,211,238,.34)}
.hero-sub{font-size:17px;color:var(--tx-2);margin-top:16px;line-height:1.8;max-width:540px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:26px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.trust-item{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--tx-2)}
.trust-item i{
  width:18px;height:18px;border-radius:6px;flex:0 0 18px;
  background:var(--brand-soft);border:1px solid rgba(61,123,255,.4);
  display:inline-block;position:relative;
}
.trust-item i::after{content:"";position:absolute;inset:5px;border-radius:2px;background:var(--accent)}
.hero-media{display:flex;justify-content:flex-end}
.phone{
  position:relative;height:min(64vh,500px);aspect-ratio:9/16;
  border-radius:20px;overflow:hidden;
  border:1px solid rgba(34,211,238,.32);
  box-shadow:0 40px 80px -40px rgba(0,0,0,1),0 0 0 6px rgba(16,26,44,.55);
  background:var(--bg-2);
}
.phone img{width:100%;height:100%;object-fit:cover}
.phone::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.16) 0%,rgba(7,12,20,.02) 40%,rgba(7,12,20,.82) 100%);
}
.phone-cap{
  position:absolute;left:14px;right:14px;bottom:14px;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:12.5px;color:var(--tx-1);
}
.play-badge{
  position:absolute;z-index:2;left:50%;top:44%;transform:translate(-50%,-50%);
  width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(7,12,20,.5);
  border:1px solid rgba(34,211,238,.6);
  box-shadow:0 0 30px -6px rgba(34,211,238,.85);
  backdrop-filter:blur(6px);
}
.play-badge::after{
  content:"";width:0;height:0;margin-left:3px;
  border-left:14px solid var(--accent);
  border-top:9px solid transparent;
  border-bottom:9px solid transparent;
}

/* ---------- 竖屏片段卡 ---------- */
.clip-rail{
  display:flex;gap:18px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;scrollbar-color:rgba(120,170,255,.35) transparent;
}
.clip-rail::-webkit-scrollbar{height:6px}
.clip-rail::-webkit-scrollbar-thumb{background:rgba(120,170,255,.28);border-radius:999px}
.clip-card{
  position:relative;flex:0 0 226px;scroll-snap-align:start;
  border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.clip-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 40px -28px rgba(34,211,238,.75)}
.clip-thumb{position:relative;aspect-ratio:9/16;overflow:hidden;background:var(--bg-1)}
.clip-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.clip-card:hover .clip-thumb img{transform:scale(1.04)}
.clip-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.05) 30%,rgba(7,12,20,.92) 100%);
}
.clip-badge{
  position:absolute;top:12px;left:12px;z-index:2;
  padding:2px 9px;border-radius:999px;
  font-size:12px;font-weight:600;
  background:rgba(7,12,20,.72);color:var(--accent);
  border:1px solid rgba(34,211,238,.4);
  backdrop-filter:blur(6px);
}
.clip-body{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:14px}
.clip-title{
  font-size:14.5px;font-weight:600;line-height:1.55;color:#fff;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:45px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.chip{
  display:inline-flex;align-items:center;
  padding:2px 9px;border-radius:999px;
  font-size:12px;line-height:1.7;
  background:var(--brand-soft);color:#9FC0FF;
  border:1px solid rgba(61,123,255,.28);
}
.clip-arrow{
  position:absolute;right:12px;bottom:12px;z-index:3;
  width:28px;height:28px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--accent);
  background:rgba(7,12,20,.7);border:1px solid rgba(34,211,238,.35);
}

/* ---------- 清单条目流 ---------- */
.flow-list{border-top:1px solid var(--line)}
.flow-item{
  display:flex;align-items:center;gap:18px;
  padding:18px 8px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.flow-item:hover{background:rgba(120,170,255,.045)}
.flow-index{
  flex:0 0 44px;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:var(--accent);
  border:1px solid rgba(34,211,238,.42);
  background:rgba(34,211,238,.06);
}
.flow-thumb{
  flex:0 0 76px;width:76px;aspect-ratio:1/1;border-radius:10px;overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
}
.flow-thumb img{width:100%;height:100%;object-fit:cover}
.flow-text{flex:1;min-width:0}
.flow-title{font-size:16px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.flow-desc{font-size:14px;color:var(--tx-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.flow-arrow{flex:0 0 auto;color:var(--tx-3);font-size:16px;transition:transform .2s var(--ease),color .2s var(--ease)}
.flow-item:hover .flow-arrow{color:var(--accent);transform:translateX(4px)}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.news-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-md);overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 var(--glass-hi);
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-soft)}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:var(--bg-1);border-bottom:1px solid var(--line)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;gap:10px}
.news-tag{
  align-self:flex-start;
  padding:2px 10px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--accent);
  border:1px solid rgba(34,211,238,.35);
  background:rgba(34,211,238,.07);
}
.news-title{
  font-size:17px;font-weight:600;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:54px;
}
.news-desc{
  font-size:14px;color:var(--tx-2);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:50px;
}
.news-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--tx-3);
}
.news-arrow{color:var(--tx-3);transition:transform .2s var(--ease),color .2s var(--ease)}
.news-card:hover .news-arrow{color:var(--accent);transform:translateX(4px)}
.empty-state{
  padding:52px 24px;text-align:center;
  border:1px dashed rgba(120,170,255,.24);border-radius:var(--r-md);
  background:rgba(16,26,44,.45);
}
.empty-ic{
  display:inline-block;width:44px;height:44px;border-radius:14px;
  border:1px solid rgba(34,211,238,.35);background:rgba(34,211,238,.08);
  position:relative;margin-bottom:14px;
}
.empty-ic::after{content:"";position:absolute;inset:13px;border-radius:50%;border:2px solid rgba(34,211,238,.65)}
.empty-state p{color:var(--tx-2);font-size:15px;margin-bottom:18px}

/* ---------- 口碑横条 ---------- */
.voice-rail{
  display:flex;gap:16px;overflow-x:auto;padding:6px 4px 20px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;scrollbar-color:rgba(120,170,255,.35) transparent;
}
.voice-rail::-webkit-scrollbar{height:6px}
.voice-rail::-webkit-scrollbar-thumb{background:rgba(120,170,255,.28);border-radius:999px}
.voice-card{
  flex:0 0 300px;scroll-snap-align:start;
  padding:20px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 var(--glass-hi);
  backdrop-filter:blur(12px);
}
.voice-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#04101F;
  background:linear-gradient(140deg,#7CA6FF,var(--accent));
}
.voice-name{font-size:14.5px;font-weight:600}
.voice-role{font-size:12px;color:var(--tx-3)}
.voice-text{font-size:14px;color:var(--tx-2);line-height:1.85;min-height:52px}
.voice-score{display:flex;align-items:center;gap:6px;margin-top:12px;font-size:12.5px;color:var(--warn)}
.stars{letter-spacing:2px;font-size:13px}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:center;
  padding:44px 44px;
  border-radius:var(--r-xl);
  background:
    radial-gradient(120% 140% at 88% 0%,rgba(34,211,238,.14),transparent 58%),
    linear-gradient(135deg,rgba(16,26,44,.96),rgba(11,18,32,.92));
  border:1px solid var(--line);
  box-shadow:0 0 60px -30px rgba(34,211,238,.6) inset,var(--shadow);
  overflow:hidden;
}
.cta-panel h2{font-size:27px;line-height:1.35;font-weight:700}
.cta-panel p{font-size:15px;color:var(--tx-2);margin-top:10px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.cta-guards{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:24px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}
.cta-guards span{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--tx-2)}
.cta-guards span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 var(--glass-hi);
  backdrop-filter:blur(12px);
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item[open]{border-color:var(--line-strong);background:rgba(20,32,52,.68)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  font-size:15.5px;font-weight:600;color:var(--tx-1);
  min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  flex:0 0 auto;color:var(--tx-2);font-size:13px;
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(180deg);color:var(--accent)}
.faq-answer{padding:0 22px 20px;font-size:14.5px;line-height:1.9;color:var(--tx-2)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:24px;
  border-top:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(7,12,20,.4),rgba(7,12,20,.95)),
    url(/assets/images/backpic/back-2.png) center/cover no-repeat;
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:radial-gradient(rgba(120,170,255,.9) 1px,transparent 1px);
  background-size:22px 22px;
}
.footer-grid{
  position:relative;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;
  padding:56px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-text{font-size:16px}
.footer-about{font-size:14px;color:var(--tx-2);line-height:1.9;max-width:320px}
.footer-col h4{font-size:13px;letter-spacing:.1em;color:var(--tx-3);font-weight:600;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:14px;color:var(--tx-2);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:20px 0 32px;border-top:1px solid var(--line);
  font-size:13px;color:var(--tx-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero h1{font-size:38px}
  .section-title{font-size:26px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .page{margin-left:0}
  .container{padding:0 20px}
  .hero{margin-top:20px}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding:40px 26px 38px}
  .hero-media{justify-content:center}
  .phone{height:min(52vh,420px);width:auto}
  .hero h1{font-size:32px}
  .section{padding:56px 0}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-panel{grid-template-columns:1fr;padding:34px 26px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-about{max-width:none}
}
@media (max-width:767px){
  body{font-size:15px;line-height:1.85}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{flex:1 1 auto}
  .section-title{font-size:23px}
  .section-head{margin-bottom:24px}
  .clip-card{flex:0 0 76vw}
  .voice-card{flex:0 0 82vw}
  .news-grid{grid-template-columns:1fr}
  .flow-item{gap:12px;padding:16px 2px}
  .flow-index{flex:0 0 38px;width:38px;height:38px;font-size:13px}
  .flow-thumb{flex:0 0 56px;width:56px}
  .flow-title{font-size:15px}
  .flow-desc{font-size:13px}
  .cta-panel h2{font-size:22px}
  .cta-guards{gap:14px}
  .faq-item summary{padding:16px 18px;font-size:15px}
  .faq-answer{padding:0 18px 18px;font-size:14px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding:44px 0 30px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:519px){
  .container{padding:0 16px}
  .hero-inner{padding:32px 20px 30px}
  .hero h1{font-size:26px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .trust-row{gap:16px 20px}
  .phone{height:min(480px,68vw*16/9)}
  .cta-panel{padding:28px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category1 */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1220;
  --bg-2:#101A2C;
  --brand:#3D7BFF;
  --brand-deep:#2C63DA;
  --accent:#22D3EE;
  --tx-1:#E8F0FF;
  --tx-2:#9AAEC9;
  --tx-3:#64789A;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(34,211,238,.35);
  --glass:rgba(20,32,52,.55);
  --glass-2:rgba(16,26,44,.72);
  --ok:#3FB98A;
  --warn:#E0A83C;
  --err:#E0685F;
  --nav-w:232px;
  --r-card:16px;
  --r-lg:18px;
  --r-pill:999px;
  --r-input:12px;
  --shadow-soft:0 22px 48px -28px rgba(3,8,18,.95);
  --shadow-card:0 14px 34px -22px rgba(3,8,18,.9);
  --glow-brand:0 12px 30px -14px rgba(61,123,255,.75);
  --ease:cubic-bezier(.32,.72,.28,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:#6fa0ff;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
h1,h2,h3,h4{margin:0;line-height:1.32;letter-spacing:.01em;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1160px;margin:0 auto;padding:0 28px;}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;
  inset:0 auto 0 0;
  width:var(--nav-w);
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg,rgba(18,29,48,.92),rgba(9,15,26,.94));
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  backdrop-filter:blur(16px) saturate(120%);
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
}
.sidebar::-webkit-scrollbar{width:6px;}
.sidebar::-webkit-scrollbar-thumb{background:rgba(120,170,255,.18);border-radius:99px;}
.sidebar-top{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--tx-1);font-weight:700;font-size:16.5px;letter-spacing:.01em;}
.brand:hover{color:var(--tx-1);}
.brand-mark{
  width:26px;height:26px;flex:none;border-radius:8px;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  box-shadow:0 0 0 1px rgba(34,211,238,.35),0 6px 18px -8px rgba(61,123,255,.9);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px 8px;border-radius:3px;
  background:rgba(7,12,20,.85);
  clip-path:polygon(0 0,100% 50%,0 100%);
}
.brand-text{white-space:nowrap;}
.drawer-close{display:none;width:36px;height:36px;line-height:1;font-size:22px;color:var(--tx-2);border-radius:10px;border:1px solid var(--line);}
.drawer-close:hover{color:var(--tx-1);border-color:var(--line-strong);}

.nav-group{display:flex;flex-direction:column;gap:6px;}
.nav-label{margin:6px 0 4px 12px;font-size:12px;letter-spacing:.14em;color:var(--tx-3);}
.nav-link{
  position:relative;display:flex;align-items:center;gap:12px;
  min-height:46px;padding:0 12px;border-radius:12px;
  color:var(--tx-2);font-size:15px;font-weight:500;
  transition:background .2s var(--ease),color .2s var(--ease);
  border:1px solid transparent;
}
.nav-link:hover{background:rgba(120,170,255,.07);color:var(--tx-1);}
.nav-link.active{background:rgba(61,123,255,.14);color:var(--tx-1);border-color:rgba(61,123,255,.24);}
.nav-link.active::before{
  content:"";position:absolute;left:-1px;top:10px;bottom:10px;width:3px;border-radius:99px;
  background:linear-gradient(180deg,var(--accent),var(--brand));
  box-shadow:0 0 12px rgba(34,211,238,.8);
}
.nav-ic{
  width:16px;height:16px;flex:none;border-radius:5px;
  border:1px solid rgba(120,170,255,.4);
  background:rgba(120,170,255,.08);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.nav-link:hover .nav-ic{border-color:rgba(34,211,238,.55);}
.nav-link.active .nav-ic{background:linear-gradient(135deg,var(--brand),var(--accent));border-color:transparent;}

.sidebar-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;}
.sidebar-note{margin:0;font-size:12px;color:var(--tx-3);line-height:1.7;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .2s var(--ease),border-color .22s var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),#1fb6d8);
  color:#fff;
  box-shadow:var(--glow-brand);
}
.btn-primary:hover{color:#fff;filter:brightness(1.07);box-shadow:0 16px 36px -14px rgba(61,123,255,.9);}
.btn-ghost{
  background:rgba(120,170,255,.05);color:var(--tx-1);border-color:var(--line);
}
.btn-ghost:hover{color:var(--tx-1);border-color:var(--line-strong);background:rgba(34,211,238,.08);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none;}

/* ---------- 移动端顶栏 ---------- */
.mobile-bar{
  display:none;
  position:sticky;top:0;z-index:50;
  align-items:center;justify-content:space-between;gap:12px;
  padding:12px 18px;
  background:rgba(9,15,26,.9);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand-sm{font-size:15.5px;}
.burger{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:rgba(120,170,255,.06);
}
.burger span{display:block;width:18px;height:2px;border-radius:99px;background:var(--tx-1);}
.burger span:nth-child(2){width:12px;align-self:flex-end;margin-right:13px;}
.drawer-backdrop{
  position:fixed;inset:0;z-index:55;
  background:rgba(4,8,16,.68);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
}

/* ---------- 主体 ---------- */
.main{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;}
.section{padding:64px 0;}
.section-tight{padding:48px 0;}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:52px 0 56px;
  background-image:
    linear-gradient(180deg,rgba(7,12,20,.86),rgba(7,12,20,.97)),
    url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(120,170,255,.55) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.55) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(120% 80% at 30% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(120% 80% at 30% 0%,#000 20%,transparent 78%);
}
.crumb{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);}
.crumb a{color:var(--tx-2);}
.crumb a:hover{color:var(--accent);}
.crumb-sep{color:var(--tx-3);opacity:.7;}
.crumb-current{color:var(--tx-2);}
.page-hero h1{
  position:relative;
  margin-top:18px;
  font-size:44px;
  line-height:1.26;
  max-width:20em;
  background:linear-gradient(180deg,#FFFFFF,#B9CDF2);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{position:relative;margin-top:14px;max-width:36em;color:var(--tx-2);font-size:16.5px;line-height:1.85;}
.chip-row{position:relative;display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:32px;padding:0 16px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;color:var(--tx-2);
  background:rgba(120,170,255,.06);
  border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.chip:hover{color:var(--tx-1);border-color:var(--line-strong);}
.chip.active{
  color:#DCF3FF;border-color:rgba(34,211,238,.5);
  background:rgba(34,211,238,.12);
  box-shadow:0 0 0 1px rgba(34,211,238,.16),0 8px 20px -14px rgba(34,211,238,.9);
}

/* ---------- 版式 A：左窄右宽 ---------- */
.layout-a{
  display:grid;
  grid-template-columns:260px minmax(0,1fr);
  gap:44px;
  align-items:start;
}
.index-panel{
  position:sticky;top:32px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:20px 16px;
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.index-panel h2{
  font-size:13px;letter-spacing:.14em;color:var(--tx-3);font-weight:600;
  padding:0 10px 12px;border-bottom:1px solid var(--line);margin-bottom:10px;
}
.index-list{display:flex;flex-direction:column;}
.index-link{
  position:relative;display:block;padding:11px 12px;border-radius:10px;
  font-size:14.5px;color:var(--tx-2);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.index-link:hover{background:rgba(120,170,255,.07);color:var(--tx-1);}
.index-link.is-current{background:rgba(61,123,255,.12);color:var(--tx-1);}
.index-link.is-current::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:99px;
  background:linear-gradient(180deg,var(--accent),var(--brand));
}
.index-tip{margin-top:14px;padding:14px 12px 4px;border-top:1px solid var(--line);font-size:12.5px;color:var(--tx-3);line-height:1.8;}

.content-flow{display:flex;flex-direction:column;gap:32px;}
.media-module{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:30px;
  align-items:center;
  padding:26px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  scroll-margin-top:32px;
}
.media-module:hover{border-color:rgba(34,211,238,.32);transform:translateY(-3px);box-shadow:0 26px 50px -30px rgba(3,8,18,.95);}
.media-module:nth-child(even){grid-template-columns:320px minmax(0,1fr);}
.media-module:nth-child(even) .module-media{order:-1;}
.module-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;color:var(--accent);letter-spacing:.08em;margin-bottom:10px;
}
.module-eyebrow::before{content:"";width:16px;height:2px;border-radius:99px;background:var(--accent);box-shadow:0 0 10px rgba(34,211,238,.9);}
.media-module h3{font-size:21px;line-height:1.4;margin-bottom:10px;}
.media-module p.desc{color:var(--tx-2);font-size:15px;line-height:1.9;}
.point-list{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.point-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--tx-2);line-height:1.75;}
.point-list li::before{
  content:"";flex:none;width:16px;height:16px;margin-top:5px;border-radius:50%;
  background:rgba(34,211,238,.14);
  border:1px solid rgba(34,211,238,.45);
  box-shadow:inset 0 0 0 3px rgba(7,12,20,.9);
}
.text-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:16px;
  font-size:14.5px;font-weight:600;color:var(--brand);
}
.text-link .arw{transition:transform .2s var(--ease);}
.text-link:hover .arw{transform:translateX(4px);}
.module-media{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  aspect-ratio:4/3;
}
.module-media img{width:100%;height:100%;object-fit:cover;}
.module-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,20,.05),rgba(7,12,20,.55));
}
.media-tag{
  position:absolute;left:12px;top:12px;z-index:2;
  height:26px;display:inline-flex;align-items:center;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;font-weight:600;
  color:#DCF3FF;background:rgba(7,12,20,.72);
  border:1px solid rgba(34,211,238,.4);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.media-time{
  position:absolute;right:12px;bottom:12px;z-index:2;
  font-size:12px;color:var(--tx-1);
  padding:3px 10px;border-radius:var(--r-pill);
  background:rgba(7,12,20,.75);border:1px solid var(--line);
}

/* ---------- 收尾条 ---------- */
.mini-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:rgba(120,170,255,.04);overflow:hidden;margin-bottom:32px;
}
.mini-stat{padding:20px 22px;border-right:1px solid var(--line);}
.mini-stat:last-child{border-right:0;}
.mini-stat strong{display:block;font-size:24px;color:var(--tx-1);line-height:1.3;}
.mini-stat span{font-size:13px;color:var(--tx-3);}

/* ---------- FAQ ---------- */
.section-head{margin-bottom:26px;}
.section-head h2{font-size:29px;line-height:1.3;}
.section-head p{margin-top:8px;color:var(--tx-2);font-size:15px;}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:4px 22px;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item:hover{border-color:rgba(120,170,255,.28);}
.faq-item[open]{
  border-color:rgba(34,211,238,.38);
  background:var(--glass-2);
  box-shadow:0 0 0 1px rgba(34,211,238,.1),0 20px 40px -30px rgba(34,211,238,.6);
}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;cursor:pointer;list-style:none;
  font-size:15.5px;font-weight:600;color:var(--tx-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";flex:none;width:10px;height:10px;
  border-right:2px solid var(--tx-2);border-bottom:2px solid var(--tx-2);
  transform:rotate(45deg);margin-right:4px;
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--accent);}
.faq-answer{padding:0 0 18px;color:var(--tx-2);font-size:14.5px;line-height:1.85;max-width:60em;}

/* ---------- CTA 条 ---------- */
.cta-bar{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:30px 32px;
  border-radius:var(--r-lg);
  border:1px solid rgba(34,211,238,.26);
  background:
    radial-gradient(120% 160% at 0% 0%,rgba(61,123,255,.22),transparent 58%),
    rgba(16,26,44,.82);
  box-shadow:0 0 0 1px rgba(34,211,238,.08),0 26px 60px -40px rgba(34,211,238,.9);
  overflow:hidden;
}
.cta-bar::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.7),transparent);
}
.cta-bar h2{font-size:24px;line-height:1.35;}
.cta-bar p{margin-top:8px;color:var(--tx-2);font-size:14.5px;max-width:44em;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:auto;
  position:relative;
  padding:56px 0 26px;
  background:
    linear-gradient(180deg,rgba(7,12,20,.94),rgba(7,12,20,1)),
    url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center top;
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(120,170,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(120,170,255,.6) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:linear-gradient(180deg,#000,transparent 70%);
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 70%);
}
.footer-grid{
  position:relative;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700;color:var(--tx-1);}
.footer-about{margin-top:14px;max-width:26em;color:var(--tx-3);font-size:13.5px;line-height:1.85;}
.footer-col h4{font-size:14px;color:var(--tx-1);margin-bottom:14px;letter-spacing:.04em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:13.5px;color:var(--tx-3);}
.footer-col a{color:var(--tx-3);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  position:relative;
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:var(--tx-3);
}

/* ---------- 状态样式 ---------- */
.skeleton{
  border-radius:var(--r-card);
  background:linear-gradient(100deg,rgba(120,170,255,.07) 20%,rgba(120,170,255,.15) 40%,rgba(120,170,255,.07) 60%);
  background-size:220% 100%;
  animation:sheen 1.5s linear infinite;
}
@keyframes sheen{from{background-position:130% 0;}to{background-position:-30% 0;}}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .layout-a{grid-template-columns:232px minmax(0,1fr);gap:32px;}
  .media-module{grid-template-columns:minmax(0,1fr) 280px;gap:24px;}
  .media-module:nth-child(even){grid-template-columns:280px minmax(0,1fr);}
  .page-hero h1{font-size:38px;}
}
@media (max-width:1023px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform .28s var(--ease);
    width:min(320px,78vw);
    box-shadow:24px 0 60px -30px rgba(0,0,0,.9);
  }
  .sidebar.open{transform:translateX(0);}
  .drawer-close{display:inline-flex;align-items:center;justify-content:center;}
  .mobile-bar{display:flex;}
  .main{margin-left:0;}
  .page-hero{padding:40px 0 44px;}
  .page-hero h1{font-size:31px;}
  .hero-lead{font-size:15.5px;}
  .section{padding:52px 0;}
  .layout-a{grid-template-columns:minmax(0,1fr);gap:26px;}
  .index-panel{position:static;}
  .index-list{flex-direction:row;flex-wrap:wrap;gap:8px;}
  .index-link{padding:8px 12px;border:1px solid var(--line);font-size:13.5px;}
  .index-link.is-current::before{display:none;}
  .index-tip{display:none;}
  .media-module,
  .media-module:nth-child(even){grid-template-columns:minmax(0,1fr);gap:20px;}
  .media-module:nth-child(even) .module-media{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-bar{padding:26px 24px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .page-hero h1{font-size:27px;}
  .section{padding:44px 0;}
  .media-module{padding:20px;}
  .media-module h3{font-size:19px;}
  .mini-stats{grid-template-columns:1fr;}
  .mini-stat{border-right:0;border-bottom:1px solid var(--line);}
  .mini-stat:last-child{border-bottom:0;}
  .section-head h2{font-size:23px;}
  .cta-bar h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
}
@media (max-width:419px){
  .page-hero h1{font-size:24px;}
  .chip{height:30px;padding:0 12px;font-size:12.5px;}
  .btn{width:100%;}
  .brand-sm{font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;}
}

/* roulang page: article */
:root{
    --bg-0:#070c14;
    --bg-1:#0b1220;
    --bg-2:#101a2c;
    --brand:#3d7bff;
    --brand-2:#2bb8ff;
    --accent:#22d3ee;
    --tx-1:#e8f0ff;
    --tx-2:#9aaec9;
    --tx-3:#64789a;
    --line:rgba(120,170,255,.14);
    --line-strong:rgba(34,211,238,.35);
    --success:#3fbf8f;
    --warn:#e0b25a;
    --danger:#e06a6a;
    --glass:rgba(20,32,52,.55);
    --glass-soft:rgba(20,32,52,.38);
    --radius-lg:18px;
    --radius-md:16px;
    --radius-sm:12px;
    --sidebar-w:232px;
    --container:1200px;
    --shadow:0 24px 70px rgba(0,0,0,.36);
    --shadow-soft:0 12px 32px rgba(0,0,0,.24);
    --glow:0 0 0 1px rgba(34,211,238,.2),0 12px 34px rgba(61,123,255,.22);
    --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    --ease:cubic-bezier(.22,.8,.24,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
    margin:0;
    min-width:320px;
    color:var(--tx-1);
    background:
        radial-gradient(circle at 82% 0%,rgba(61,123,255,.12),transparent 40%),
        radial-gradient(circle at 12% 16%,rgba(34,211,238,.07),transparent 30%),
        var(--bg-0);
    font-family:var(--font);
    font-size:16px;
    line-height:1.9;
    text-rendering:optimizeLegibility;
    -webkit-font-smoothing:antialiased;
}
body.menu-open{overflow:hidden}
body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    pointer-events:none;
    background-image:
        linear-gradient(rgba(120,170,255,.045) 1px,transparent 1px),
        linear-gradient(90deg,rgba(120,170,255,.045) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:linear-gradient(180deg,rgba(0,0,0,.65),transparent 76%);
}
::selection{background:rgba(34,211,238,.28);color:#fff}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.skip-link{
    position:fixed;
    left:16px;
    top:-80px;
    z-index:200;
    padding:10px 16px;
    border-radius:10px;
    background:var(--brand);
    color:#fff;
    transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}
.container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 32px;
}
.sidebar{
    position:fixed;
    inset:0 auto 0 0;
    z-index:80;
    width:var(--sidebar-w);
    display:flex;
    flex-direction:column;
    gap:22px;
    padding:26px 16px 20px;
    overflow-y:auto;
    background:rgba(9,16,28,.82);
    border-right:1px solid var(--line);
    backdrop-filter:blur(18px) saturate(125%);
    -webkit-backdrop-filter:blur(18px) saturate(125%);
    box-shadow:18px 0 50px rgba(0,0,0,.18);
    transition:transform .28s var(--ease);
}
.sidebar::before{
    content:"";
    position:absolute;
    top:0;
    right:-1px;
    width:1px;
    height:180px;
    background:linear-gradient(180deg,transparent,rgba(34,211,238,.55),transparent);
}
.brand{padding:0 8px}
.brand-link{
    display:flex;
    align-items:center;
    gap:10px;
    min-height:44px;
}
.brand-mark{
    position:relative;
    flex:0 0 36px;
    width:36px;
    height:36px;
    border-radius:11px;
    background:linear-gradient(145deg,rgba(61,123,255,.32),rgba(34,211,238,.1));
    border:1px solid rgba(34,211,238,.42);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 0 24px rgba(61,123,255,.18);
    transform:rotate(-8deg);
}
.brand-mark::before{
    content:"";
    position:absolute;
    inset:9px;
    border:1px solid rgba(232,240,255,.85);
    border-radius:4px;
}
.brand-mark::after{
    content:"";
    position:absolute;
    width:6px;
    height:6px;
    right:5px;
    bottom:5px;
    border-radius:50%;
    background:var(--accent);
    box-shadow:0 0 12px var(--accent);
}
.brand-text{
    display:block;
    font-size:17px;
    font-weight:750;
    line-height:1.35;
    letter-spacing:.01em;
    color:var(--tx-1);
}
.brand-sub{
    margin-top:7px;
    padding-left:46px;
    color:var(--tx-3);
    font-size:12px;
    line-height:1.5;
}
.nav-group{display:flex;flex-direction:column;gap:5px}
.nav-label{
    padding:0 12px;
    margin-bottom:5px;
    color:var(--tx-3);
    font-size:11px;
    font-weight:650;
    letter-spacing:.16em;
}
.nav-link{
    position:relative;
    display:flex;
    align-items:center;
    gap:10px;
    min-height:44px;
    padding:0 12px;
    border-radius:12px;
    color:var(--tx-2);
    font-size:15px;
    font-weight:500;
    transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link:hover{background:rgba(120,170,255,.08);color:var(--tx-1)}
.nav-link.active{
    color:var(--tx-1);
    background:linear-gradient(90deg,rgba(61,123,255,.17),rgba(61,123,255,.03));
    box-shadow:inset 0 0 0 1px rgba(120,170,255,.08);
}
.nav-link.active::before{
    content:"";
    position:absolute;
    left:-16px;
    top:8px;
    bottom:8px;
    width:3px;
    border-radius:0 3px 3px 0;
    background:var(--accent);
    box-shadow:0 0 12px var(--accent);
}
.nav-ic{
    position:relative;
    flex:0 0 18px;
    width:18px;
    height:18px;
    border:1px solid rgba(154,174,201,.55);
    border-radius:6px;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-ic::before{
    content:"";
    position:absolute;
    inset:4px;
    border:1px solid rgba(34,211,238,.6);
    border-radius:2px;
}
.nav-link:hover .nav-ic,.nav-link.active .nav-ic{
    border-color:rgba(34,211,238,.9);
    box-shadow:0 0 12px rgba(34,211,238,.24);
}
.sidebar-foot{
    margin-top:auto;
    padding:18px 8px 0;
    border-top:1px solid var(--line);
}
.sidebar-foot p{margin-top:10px;color:var(--tx-3);font-size:11px;line-height:1.65}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:0 20px;
    border:1px solid transparent;
    border-radius:999px;
    font-size:14px;
    font-weight:650;
    line-height:1;
    white-space:nowrap;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn-primary{
    color:#fff;
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    box-shadow:0 10px 28px rgba(61,123,255,.26),inset 0 1px 0 rgba(255,255,255,.18);
}
.btn-primary:hover{box-shadow:0 12px 36px rgba(34,211,238,.24),0 0 0 1px rgba(34,211,238,.22),inset 0 1px 0 rgba(255,255,255,.2)}
.btn-ghost{
    color:var(--tx-1);
    border-color:rgba(120,170,255,.28);
    background:rgba(20,32,52,.32);
}
.btn-ghost:hover{border-color:var(--line-strong);background:rgba(20,32,52,.58)}
.btn-block{width:100%}
.btn-sm{min-height:38px;padding:0 15px;font-size:13px}
.mobile-header{
    display:none;
    position:fixed;
    inset:0 0 auto 0;
    z-index:60;
    height:64px;
    align-items:center;
    justify-content:space-between;
    padding:0 18px;
    background:rgba(7,12,20,.82);
    border-bottom:1px solid var(--line);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
}
.mobile-brand{display:flex;align-items:center;gap:9px;min-height:44px;font-size:15px;font-weight:750}
.mobile-brand .brand-mark{width:30px;height:30px;flex-basis:30px;border-radius:9px}
.menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    border:1px solid var(--line);
    border-radius:12px;
    background:rgba(20,32,52,.45);
    color:var(--tx-1);
}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
    display:block;
    width:18px;
    height:2px;
    border-radius:2px;
    background:currentColor;
    transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.menu-toggle span{position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}
.drawer-overlay{
    position:fixed;
    inset:0;
    z-index:70;
    background:rgba(2,6,12,.66);
    opacity:0;
    visibility:hidden;
    transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-overlay.is-open{opacity:1;visibility:visible}
.reading-progress{
    position:fixed;
    top:0;
    left:var(--sidebar-w);
    right:0;
    z-index:95;
    height:2px;
    background:rgba(120,170,255,.08);
    pointer-events:none;
}
.reading-progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));box-shadow:0 0 12px var(--accent)}
.page-shell{min-height:100vh;margin-left:var(--sidebar-w)}
.main{padding:44px 0 72px}
.breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    min-width:0;
    margin-bottom:24px;
    color:var(--tx-3);
    font-size:13px;
    line-height:1.6;
}
.breadcrumb a{display:inline-flex;align-items:center;min-height:32px;transition:color .2s var(--ease)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(100,120,154,.7)}
.crumb-current{
    max-width:56vw;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
    color:var(--tx-2);
}
.article-head{
    position:relative;
    overflow:hidden;
    padding:36px 38px 32px;
    border:1px solid var(--line);
    border-radius:22px;
    background:linear-gradient(180deg,rgba(16,26,44,.82),rgba(11,18,32,.6));
    box-shadow:var(--shadow-soft),inset 0 1px 0 rgba(255,255,255,.055);
}
.article-head::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url("/assets/images/backpic/back-2.png");
    background-size:cover;
    background-position:center right;
    opacity:.12;
    mix-blend-mode:screen;
    mask-image:linear-gradient(90deg,transparent 20%,rgba(0,0,0,.72) 100%);
    pointer-events:none;
}
.article-head::after{
    content:"";
    position:absolute;
    top:-90px;
    right:-60px;
    width:280px;
    height:280px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(61,123,255,.22),transparent 68%);
    pointer-events:none;
}
.article-head > *{position:relative;z-index:1}
.badge{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:26px;
    padding:0 11px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    line-height:1;
}
.badge-outline{
    color:#bcd4ff;
    border:1px solid rgba(120,170,255,.3);
    background:rgba(61,123,255,.08);
}
.badge-outline:hover{border-color:var(--line-strong);color:var(--accent)}
.article-head h1{
    max-width:940px;
    margin-top:18px;
    color:var(--tx-1);
    font-size:clamp(30px,3.7vw,44px);
    font-weight:800;
    line-height:1.32;
    letter-spacing:-.012em;
    overflow-wrap:break-word;
}
.meta-row{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px 22px;
    margin-top:22px;
    color:var(--tx-3);
    font-size:13px;
    line-height:1.7;
}
.meta-row span{display:inline-flex;align-items:center;gap:6px}
.meta-row span::before{
    content:"";
    width:5px;
    height:5px;
    border-radius:50%;
    background:rgba(34,211,238,.7);
    box-shadow:0 0 8px rgba(34,211,238,.35);
}
.article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 300px;
    gap:44px;
    align-items:start;
    margin-top:32px;
}
.article-body-wrap{min-width:0}
.article-body{
    padding:38px 40px;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    background:rgba(16,26,44,.46);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    color:#c8d7ee;
    font-size:16px;
    line-height:1.95;
    overflow-wrap:break-word;
}
.article-body > :first-child{margin-top:0}
.article-body > :last-child{margin-bottom:0}
.article-body p{margin:1.15em 0}
.article-body h2{
    position:relative;
    margin:1.75em 0 .72em;
    padding-left:16px;
    color:var(--tx-1);
    font-size:28px;
    font-weight:750;
    line-height:1.4;
    letter-spacing:-.01em;
    scroll-margin-top:96px;
}
.article-body h2::before{
    content:"";
    position:absolute;
    left:0;
    top:.3em;
    bottom:.3em;
    width:3px;
    border-radius:3px;
    background:linear-gradient(180deg,var(--accent),var(--brand));
    box-shadow:0 0 12px rgba(34,211,238,.55);
}
.article-body h3{
    margin:1.55em 0 .55em;
    color:#eff6ff;
    font-size:20px;
    font-weight:700;
    line-height:1.5;
    scroll-margin-top:96px;
}
.article-body h4{
    margin:1.35em 0 .45em;
    color:var(--tx-1);
    font-size:17px;
    font-weight:650;
}
.article-body a{
    color:#7aa7ff;
    text-decoration:underline;
    text-underline-offset:3px;
    text-decoration-color:rgba(122,167,255,.45);
}
.article-body a:hover{color:var(--accent);text-decoration-color:var(--accent)}
.article-body strong{color:#f0f6ff;font-weight:700}
.article-body ul,.article-body ol{margin:1em 0 1.25em;padding-left:0}
.article-body ul li,.article-body ol li{position:relative;margin:.55em 0;padding-left:1.45em}
.article-body ul li::before{
    content:"";
    position:absolute;
    left:.1em;
    top:.78em;
    width:6px;
    height:6px;
    border-radius:50%;
    background:var(--brand);
    box-shadow:0 0 8px rgba(61,123,255,.52);
}
.article-body ol{counter-reset:item}
.article-body ol li{counter-increment:item}
.article-body ol li::before{
    content:counter(item);
    position:absolute;
    left:0;
    top:.3em;
    width:20px;
    height:20px;
    display:grid;
    place-items:center;
    border:1px solid rgba(61,123,255,.45);
    border-radius:50%;
    color:#9dc0ff;
    font-size:11px;
    line-height:1;
}
.article-body blockquote{
    margin:1.55em 0;
    padding:18px 22px;
    border-left:3px solid var(--accent);
    border-radius:0 14px 14px 0;
    background:rgba(20,32,52,.56);
    color:#b9cbe4;
    box-shadow:0 0 22px rgba(34,211,238,.07);
}
.article-body blockquote p{margin:.35em 0}
.article-body img{
    max-width:100%;
    margin:1.5em auto;
    border-radius:12px;
    border:1px solid rgba(120,170,255,.18);
    background:var(--bg-2);
}
.article-body figure{margin:1.6em 0}
.article-body figcaption{
    margin-top:8px;
    color:var(--tx-3);
    font-size:13px;
    line-height:1.65;
    text-align:center;
}
.article-body table{
    width:100%;
    margin:1.5em 0;
    border-collapse:collapse;
    border:1px solid rgba(120,170,255,.2);
    border-radius:12px;
    overflow:hidden;
    font-size:14px;
    line-height:1.75;
}
.article-body th,.article-body td{
    padding:11px 14px;
    border:1px solid rgba(120,170,255,.16);
    text-align:left;
    vertical-align:top;
}
.article-body th{background:rgba(61,123,255,.13);color:var(--tx-1);font-weight:650}
.article-body tr:nth-child(even) td{background:rgba(20,32,52,.4)}
.article-body hr{border:0;height:1px;background:var(--line);margin:2em 0}
.article-body code{
    padding:2px 6px;
    border-radius:6px;
    background:rgba(61,123,255,.12);
    color:#bcd8ff;
    font-size:.92em;
}
.empty-article{
    padding:64px 28px;
    text-align:center;
    border:1px dashed rgba(120,170,255,.26);
    border-radius:var(--radius-md);
    background:rgba(16,26,44,.44);
}
.empty-article .empty-icon{
    width:52px;
    height:52px;
    margin:0 auto 16px;
    border:1px solid rgba(34,211,238,.34);
    border-radius:16px;
    background:radial-gradient(circle,rgba(34,211,238,.16),transparent 70%);
}
.empty-article h2{font-size:22px;color:var(--tx-1);margin-bottom:8px}
.empty-article p{color:var(--tx-2);margin-bottom:20px}
.tag-row{
    display:flex;
    flex-wrap:wrap;
    gap:9px;
    margin-top:22px;
}
.chip{
    display:inline-flex;
    align-items:center;
    min-height:26px;
    padding:0 11px;
    border-radius:999px;
    color:#a9c4ef;
    background:rgba(61,123,255,.1);
    border:1px solid rgba(120,170,255,.12);
    font-size:12px;
    line-height:1;
}
.chip:hover{border-color:rgba(34,211,238,.32);color:var(--accent)}
.article-aside{position:sticky;top:24px;display:flex;flex-direction:column;gap:18px}
.side-card{
    padding:20px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:rgba(20,32,52,.55);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.055);
    backdrop-filter:blur(14px) saturate(120%);
    -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.side-card h3{
    margin-bottom:13px;
    color:var(--tx-1);
    font-size:16px;
    font-weight:700;
    line-height:1.5;
}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
    display:block;
    padding:8px 10px;
    border-radius:8px;
    color:var(--tx-2);
    font-size:13px;
    line-height:1.6;
    border-left:2px solid transparent;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.toc-list a:hover,.toc-list a.active{background:rgba(61,123,255,.12);color:var(--tx-1);border-left-color:var(--accent)}
.toc-list a.toc-sub{padding-left:20px;font-size:12px;color:var(--tx-3)}
.toc-list .muted{margin:0;padding:4px 10px;color:var(--tx-3);font-size:12px}
.cta-card img{
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
    border-radius:11px;
    border:1px solid rgba(120,170,255,.15);
    margin-bottom:15px;
    background:var(--bg-2);
}
.cta-card p{margin-bottom:15px;color:var(--tx-2);font-size:13px;line-height:1.75}
.related-section,.faq-section,.cta-section{padding-top:58px}
.section-head{margin-bottom:24px}
.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--accent);
    font-size:12px;
    font-weight:650;
    letter-spacing:.08em;
}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--accent);box-shadow:0 0 8px var(--accent)}
.section-head h2{
    margin-top:8px;
    color:var(--tx-1);
    font-size:clamp(23px,2.4vw,30px);
    font-weight:750;
    line-height:1.35;
}
.section-head p{margin-top:8px;color:var(--tx-2);font-size:14px;line-height:1.8}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.related-item{
    display:flex;
    align-items:center;
    gap:14px;
    min-height:96px;
    padding:14px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:rgba(20,32,52,.46);
    transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.related-item:hover{transform:translateY(-3px);border-color:var(--line-strong);background:rgba(20,32,52,.62)}
.related-item img{
    flex:0 0 78px;
    width:78px;
    height:68px;
    object-fit:cover;
    border-radius:10px;
    border:1px solid rgba(120,170,255,.14);
    background:var(--bg-2);
}
.related-item h3{color:var(--tx-1);font-size:14px;font-weight:650;line-height:1.55}
.related-item p{
    margin-top:4px;
    color:var(--tx-3);
    font-size:12px;
    line-height:1.55;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.related-arrow{
    flex:0 0 26px;
    width:26px;
    height:26px;
    margin-left:auto;
    display:grid;
    place-items:center;
    border:1px solid rgba(120,170,255,.18);
    border-radius:50%;
    color:var(--tx-2);
    font-size:14px;
    transition:transform .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.related-item:hover .related-arrow{transform:translateX(2px);color:var(--accent);border-color:rgba(34,211,238,.4)}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:rgba(20,32,52,.46);
    overflow:hidden;
    transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item:hover{border-color:rgba(120,170,255,.24)}
.faq-item[open]{border-color:var(--line-strong);background:rgba(20,32,52,.6)}
.faq-item summary{
    position:relative;
    display:flex;
    align-items:center;
    gap:14px;
    min-height:60px;
    padding:16px 54px 16px 20px;
    color:var(--tx-1);
    font-size:15px;
    font-weight:600;
    line-height:1.6;
    cursor:pointer;
    list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
    content:"";
    position:absolute;
    right:20px;
    width:8px;
    height:8px;
    border-right:1.5px solid var(--tx-2);
    border-bottom:1.5px solid var(--tx-2);
    transform:rotate(45deg) translateY(-2px);
    transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(225deg) translate(-2px,-2px);border-color:var(--accent)}
.faq-answer{padding:0 22px 20px;color:var(--tx-2);font-size:14px;line-height:1.85}
.cta-panel{
    position:relative;
    display:grid;
    grid-template-columns:minmax(0,1fr) 300px;
    gap:28px;
    align-items:center;
    overflow:hidden;
    padding:34px 36px;
    border:1px solid rgba(34,211,238,.22);
    border-radius:22px;
    background:
        linear-gradient(110deg,rgba(20,32,52,.92),rgba(16,26,44,.78)),
        radial-gradient(circle at 20% 30%,rgba(61,123,255,.2),transparent 40%);
    box-shadow:0 0 48px rgba(34,211,238,.08),inset 0 1px 0 rgba(255,255,255,.06);
}
.cta-panel::after{
    content:"";
    position:absolute;
    inset:auto -20% -80% 35%;
    height:180px;
    background:radial-gradient(ellipse,rgba(34,211,238,.12),transparent 65%);
    pointer-events:none;
}
.cta-panel h2{margin-top:8px;font-size:clamp(23px,2.5vw,31px);line-height:1.35;color:var(--tx-1)}
.cta-panel p{margin-top:9px;color:var(--tx-2);font-size:14px;line-height:1.8;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.cta-panel img{
    width:100%;
    aspect-ratio:16/10;
    object-fit:cover;
    border-radius:14px;
    border:1px solid rgba(120,170,255,.18);
    opacity:.82;
}
.site-footer{
    border-top:1px solid var(--line);
    background:
        linear-gradient(180deg,rgba(10,17,30,.4),rgba(7,12,20,.92)),
        radial-gradient(circle at 90% 10%,rgba(61,123,255,.08),transparent 35%);
}
.site-footer .container{padding-top:50px;padding-bottom:22px}
.footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:34px;
    padding-bottom:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:13px}
.footer-brand .brand-mark{width:32px;height:32px;flex-basis:32px;border-radius:10px}
.footer-brand .brand-text{font-size:17px}
.footer-about{max-width:310px;color:var(--tx-3);font-size:13px;line-height:1.8}
.footer-col h4{margin-bottom:14px;color:var(--tx-1);font-size:14px;font-weight:650}
.footer-col ul{display:flex;flex-direction:column;gap:9px}
.footer-col li,.footer-col a{color:var(--tx-3);font-size:13px;line-height:1.65}
.footer-col a{display:inline-flex;min-height:28px;align-items:center;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
    display:flex;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:8px 24px;
    padding-top:20px;
    border-top:1px solid var(--line);
    color:var(--tx-3);
    font-size:12px;
    line-height:1.7;
}
@media (max-width:1279px){
    .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:30px}
    .article-body{padding:32px}
    .article-aside{position:static}
    .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .related-item:last-child{grid-column:1 / -1}
}
@media (max-width:1023px){
    .sidebar{
        width:min(78vw,320px);
        transform:translateX(-102%);
        z-index:90;
        border-right-color:rgba(120,170,255,.22);
    }
    .sidebar.is-open{transform:translateX(0)}
    .mobile-header{display:flex}
    .reading-progress{left:0;top:0;z-index:100}
    .page-shell{margin-left:0;padding-top:64px}
    .main{padding:32px 0 58px}
    .article-layout{grid-template-columns:1fr;gap:24px}
    .article-aside{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .article-head{padding:30px}
    .cta-panel{grid-template-columns:1fr}
    .cta-panel img{max-height:220px}
    .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
    .footer-grid > :last-child{grid-column:auto}
}
@media (max-width:767px){
    .container{padding:0 20px}
    .main{padding-top:26px}
    .breadcrumb{margin-bottom:18px;font-size:12px}
    .crumb-current{max-width:44vw}
    .article-head{padding:24px 22px;border-radius:18px}
    .article-head h1{margin-top:15px;font-size:clamp(25px,7vw,31px);line-height:1.38}
    .meta-row{gap:7px 16px;margin-top:17px;font-size:12px}
    .article-body{padding:24px 20px;border-radius:16px;font-size:15px;line-height:1.9}
    .article-body h2{font-size:23px;margin-top:1.55em}
    .article-body h3{font-size:18px}
    .article-aside{grid-template-columns:1fr}
    .related-section,.faq-section,.cta-section{padding-top:44px}
    .related-grid{grid-template-columns:1fr}
    .related-item:last-child{grid-column:auto}
    .cta-panel{padding:26px 22px;border-radius:18px}
    .cta-panel img{display:none}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
    .footer-grid > :first-child{grid-column:1 / -1}
    .footer-bottom{flex-direction:column}
    .tag-row .chip{min-height:28px}
}
@media (max-width:520px){
    .mobile-brand{font-size:14px}
    .article-head{padding:22px 18px}
    .article-body{padding:22px 17px}
    .article-body table{font-size:12px}
    .article-body th,.article-body td{padding:8px 9px}
    .related-item{align-items:flex-start}
    .related-item img{flex-basis:64px;width:64px;height:58px}
    .cta-actions{flex-direction:column;align-items:stretch}
    .cta-actions .btn{width:100%}
    .footer-grid{grid-template-columns:1fr}
    .footer-grid > :first-child{grid-column:auto}
    .footer-bottom span{overflow-wrap:anywhere}
}
@media (prefers-reduced-motion:reduce){
    *,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}
}

/* roulang page: category2 */
:root{
  --bg-0:#070C14;
  --bg-1:#0B1220;
  --bg-2:#101A2C;
  --brand:#3D7BFF;
  --brand-deep:#2B62E0;
  --accent:#22D3EE;
  --accent-deep:#0E93B8;
  --tx-1:#E8F0FF;
  --tx-2:#9AAEC9;
  --tx-3:#64789A;
  --line:rgba(120,170,255,.14);
  --line-strong:rgba(34,211,238,.35);
  --ok:#34D399;
  --warn:#E0A94A;
  --err:#E06C6C;
  --glass:rgba(20,32,52,.55);
  --glass-soft:rgba(20,32,52,.38);
  --r-sm:12px;
  --r-md:16px;
  --r-lg:18px;
  --r-pill:999px;
  --shadow:0 18px 40px rgba(3,8,18,.55);
  --shadow-lg:0 26px 60px rgba(3,8,18,.65);
  --sidebar:232px;
  --ease:cubic-bezier(.4,0,.2,1);
  --gap:24px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  min-height:100%;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.9;
  color:var(--tx-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 520px at 78% -12%, rgba(61,123,255,.16), transparent 62%),
    radial-gradient(720px 520px at 6% 2%, rgba(34,211,238,.09), transparent 60%),
    linear-gradient(rgba(120,170,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,170,255,.045) 1px, transparent 1px);
  background-size:auto,auto,56px 56px,56px 56px;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

body.lock{overflow:hidden;}

h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:.01em;font-weight:700;}
p{margin:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;list-style:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 40px;
}

/* ---------- 侧栏导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar);
  display:flex;
  flex-direction:column;
  gap:26px;
  padding:26px 18px 22px;
  background:linear-gradient(180deg, rgba(16,26,44,.94), rgba(9,15,26,.94));
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  border-right:1px solid var(--line);
  z-index:60;
  overflow-y:auto;
}

.sidebar-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
}

.brand-mark{
  position:relative;
  flex:0 0 auto;
  width:30px;height:30px;
  border-radius:9px;
  background:linear-gradient(140deg,var(--brand),var(--accent));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16), 0 6px 18px rgba(61,123,255,.38);
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:8px;
  border-radius:4px;
  border:1.5px solid rgba(7,12,20,.78);
}

.brand-text{
  font-size:16px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--tx-1);
}

.drawer-close{
  display:none;
  width:36px;height:36px;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--tx-2);
  font-size:20px;
  line-height:1;
}
.drawer-close:hover{color:var(--tx-1);background:rgba(120,170,255,.1);}

.nav-group{
  display:flex;
  flex-direction:column;
  gap:4px;
}

.nav-label{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--tx-3);
  padding:0 12px 6px;
  text-transform:uppercase;
}

.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:0 12px;
  border-radius:12px;
  font-size:15px;
  font-weight:500;
  color:var(--tx-2);
  transition:background .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.nav-link:hover{background:rgba(120,170,255,.09);color:var(--tx-1);}
.nav-link.active{
  background:rgba(61,123,255,.16);
  color:var(--tx-1);
  box-shadow:inset 0 0 0 1px rgba(61,123,255,.28);
}
.nav-link.active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:3px;
  background:linear-gradient(180deg,var(--accent),var(--brand));
  box-shadow:0 0 10px rgba(34,211,238,.7);
}

.nav-ic{
  flex:0 0 auto;
  width:18px;height:18px;
  border-radius:6px;
  border:1px solid rgba(34,211,238,.32);
  background:rgba(34,211,238,.1);
  transition:border-color .2s var(--ease), background .2s var(--ease);
}
.nav-link:hover .nav-ic,
.nav-link.active .nav-ic{
  border-color:rgba(34,211,238,.7);
  background:rgba(34,211,238,.22);
}

.sidebar-foot{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.side-note{
  font-size:12px;
  line-height:1.7;
  color:var(--tx-3);
  padding:0 4px;
}

/* ---------- 移动顶栏 ---------- */
.mobile-bar{
  display:none;
  position:sticky;
  top:0;
  z-index:50;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 18px;
  background:rgba(9,15,26,.92);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.hamburger{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:44px;height:44px;
  padding:0 10px;
  border-radius:12px;
  border:1px solid var(--line);
}
.hamburger span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--tx-2);
  transition:background .2s var(--ease);
}
.hamburger:hover span{background:var(--accent);}

.drawer-mask{
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(4,8,16,.62);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
  opacity:0;
  visibility:hidden;
  transition:opacity .24s var(--ease), visibility .24s var(--ease);
}
.drawer-mask.show{opacity:1;visibility:visible;}

/* ---------- 主内容 ---------- */
.content{
  margin-left:var(--sidebar);
  min-height:100vh;
  padding-bottom:0;
}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding:26px 0 0;
  font-size:13px;
  color:var(--tx-3);
}
.crumb a{color:var(--tx-2);}
.crumb a:hover{color:var(--accent);}
.crumb .sep{color:var(--tx-3);opacity:.7;}
.crumb .now{color:var(--tx-2);}

/* ---------- Banner ---------- */
.banner{
  position:relative;
  margin-top:20px;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background-image:linear-gradient(100deg, rgba(7,12,20,.94) 12%, rgba(7,12,20,.72) 54%, rgba(7,12,20,.42) 100%), url(/assets/images/backpic/back-2.png);
  background-size:cover;
  background-position:center;
  box-shadow:var(--shadow);
}
.banner::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:radial-gradient(520px 260px at 88% 10%, rgba(34,211,238,.14), transparent 70%);
}
.banner-inner{
  position:relative;
  z-index:1;
  padding:52px 48px 44px;
  max-width:820px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  padding:6px 12px;
  border-radius:var(--r-pill);
  border:1px solid rgba(34,211,238,.34);
  background:rgba(34,211,238,.08);
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px rgba(34,211,238,.9);
}
h1{
  margin-top:20px;
  font-size:42px;
  line-height:1.28;
  letter-spacing:.01em;
}
.lede{
  margin-top:16px;
  font-size:16px;
  line-height:1.9;
  color:var(--tx-2);
  max-width:600px;
}

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:26px;
}
.chip{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 13px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  line-height:1;
  color:var(--tx-2);
  border:1px solid var(--line);
  background:rgba(20,32,52,.5);
  transition:color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.chip.is-on{
  color:#04121F;
  font-weight:600;
  border-color:transparent;
  background:linear-gradient(135deg,var(--accent),#7BE6F7);
  box-shadow:0 6px 18px rgba(34,211,238,.28);
}
.chip:hover{border-color:var(--line-strong);color:var(--tx-1);}
.chip.is-on:hover{color:#04121F;}

.banner-stats{
  display:flex;
  flex-wrap:wrap;
  gap:28px;
  margin-top:32px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.stat b{
  display:block;
  font-size:22px;
  font-weight:700;
  color:var(--tx-1);
  letter-spacing:.02em;
}
.stat span{
  display:block;
  margin-top:2px;
  font-size:12.5px;
  color:var(--tx-3);
}

/* ---------- 板块标题 ---------- */
.section{
  padding:76px 0 0;
}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:30px;
}
.sec-head h2{
  font-size:29px;
  line-height:1.3;
}
.sec-head p{
  margin-top:10px;
  font-size:14.5px;
  color:var(--tx-2);
  max-width:560px;
}
.sec-tag{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  margin-bottom:10px;
  display:block;
}

/* ---------- 双列错落大卡 ---------- */
.grid-b{
  display:grid;
  grid-template-columns:repeat(2, minmax(0,1fr));
  gap:30px;
  align-items:start;
  padding-bottom:64px;
}
.grid-b > .gcard:nth-child(even){
  margin-top:56px;
}

.gcard{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-lg);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06), var(--shadow);
  overflow:hidden;
  transition:transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.gcard:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08), var(--shadow-lg), 0 0 0 1px rgba(34,211,238,.22);
}
.gcard-media{
  position:relative;
  aspect-ratio:16 / 9;
  background:var(--bg-2);
  overflow:hidden;
}
.gcard-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.gcard:hover .gcard-media img{transform:scale(1.04);}
.gcard-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg, rgba(7,12,20,0) 42%, rgba(7,12,20,.62) 100%);
  pointer-events:none;
}
.badge{
  position:absolute;
  top:14px;left:14px;
  z-index:1;
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--accent);
  border:1px solid rgba(34,211,238,.45);
  background:rgba(7,12,20,.72);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.gcard-body{
  padding:24px 24px 22px;
  display:flex;
  flex-direction:column;
  gap:12px;
  flex:1 1 auto;
}
.gcard-body h3{
  font-size:20px;
  line-height:1.4;
}
.gcard-body p{
  font-size:14.5px;
  line-height:1.85;
  color:var(--tx-2);
}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-top:4px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  align-self:flex-start;
  min-height:32px;
  transition:color .2s var(--ease);
}
.link-arrow::after{
  content:"→";
  transition:transform .2s var(--ease);
}
.link-arrow:hover{color:var(--accent);}
.link-arrow:hover::after{transform:translateX(4px);}

/* ---------- 三联要点条 ---------- */
.trio{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:20px;
}
.trio-item{
  padding:24px;
  border-radius:var(--r-md);
  background:var(--glass-soft);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
  transition:border-color .22s var(--ease), background .22s var(--ease);
}
.trio-item:hover{
  border-color:var(--line-strong);
  background:rgba(24,38,60,.6);
}
.trio-k{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  color:var(--tx-1);
}
.trio-k i{
  width:26px;height:26px;
  border-radius:8px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-style:normal;
  font-size:12px;
  font-weight:700;
  color:#04121F;
  background:linear-gradient(140deg,var(--brand),var(--accent));
}
.trio-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  color:var(--tx-2);
  background:rgba(61,123,255,.13);
  border:1px solid rgba(61,123,255,.22);
  transition:color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.trio-item:hover .tag{
  color:var(--tx-1);
  background:rgba(34,211,238,.13);
  border-color:rgba(34,211,238,.3);
}

/* ---------- FAQ ---------- */
.faq{
  display:grid;
  gap:14px;
}
.faq-item{
  border-radius:var(--r-md);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;
  transition:border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.faq-item[open]{
  border-color:var(--line-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06), 0 0 0 1px rgba(34,211,238,.16);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:19px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--tx-1);
  cursor:pointer;
  list-style:none;
  min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:#fff;}
.faq-ic{
  flex:0 0 auto;
  width:22px;height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:1px solid var(--line);
  color:var(--tx-2);
  font-size:12px;
  transition:transform .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.faq-item[open] .faq-ic{
  transform:rotate(180deg);
  color:var(--accent);
  border-color:rgba(34,211,238,.5);
}
.faq-a{
  padding:0 22px 22px;
  font-size:14.5px;
  line-height:1.9;
  color:var(--tx-2);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn-primary{
  color:var(--tx-1);
  background:linear-gradient(135deg,var(--brand-deep),var(--accent-deep));
  box-shadow:0 12px 28px rgba(43,98,224,.38), inset 0 0 0 1px rgba(255,255,255,.16);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 36px rgba(34,211,238,.4), inset 0 0 0 1px rgba(255,255,255,.24);
  filter:brightness(1.08);
}
.btn-primary:active{transform:translateY(1px);}
.btn-glass{
  color:var(--tx-1);
  background:rgba(20,32,52,.62);
  border-color:var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.btn-glass:hover{
  border-color:var(--line-strong);
  background:rgba(28,44,68,.75);
  transform:translateY(-2px);
}
.btn-ghost{
  color:var(--tx-2);
  border-color:rgba(120,170,255,.26);
  background:transparent;
}
.btn-ghost:hover{color:var(--tx-1);border-color:var(--accent);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn:disabled,.btn[aria-disabled="true"]{
  opacity:.45;
  cursor:not-allowed;
  box-shadow:none;
  filter:none;
  transform:none;
}

/* ---------- CTA ---------- */
.cta-wrap{padding:76px 0 84px;}
.cta-panel{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  padding:40px 44px;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(120deg, rgba(61,123,255,.18), rgba(34,211,238,.10) 70%, rgba(20,32,52,.55)),
    var(--bg-2);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08), 0 0 46px rgba(34,211,238,.14), var(--shadow);
  overflow:hidden;
}
.cta-panel::before{
  content:"";
  position:absolute;
  inset:-1px;
  pointer-events:none;
  border-radius:inherit;
  background:radial-gradient(340px 180px at 92% 6%, rgba(34,211,238,.24), transparent 70%);
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{font-size:27px;line-height:1.35;}
.cta-copy p{
  margin-top:10px;
  font-size:14.5px;
  color:var(--tx-2);
  max-width:520px;
}
.cta-actions{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  flex:0 0 auto;
}
.cta-points{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin-top:20px;
  font-size:12.5px;
  color:var(--tx-2);
}
.cta-points span{display:inline-flex;align-items:center;gap:7px;}
.cta-points span::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 8px rgba(34,211,238,.85);
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-left:var(--sidebar);
  border-top:1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(11,18,32,.6), rgba(7,12,20,.95)),
    linear-gradient(rgba(120,170,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,170,255,.035) 1px, transparent 1px);
  background-size:auto, 52px 52px, 52px 52px;
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:36px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:700;
}
.footer-about{
  margin-top:14px;
  font-size:13.5px;
  line-height:1.9;
  color:var(--tx-3);
  max-width:300px;
}
.footer-col h4{
  font-size:13px;
  letter-spacing:.1em;
  color:var(--tx-3);
  font-weight:600;
  margin-bottom:14px;
}
.footer-col li{
  font-size:14px;
  color:var(--tx-2);
  line-height:2.1;
}
.footer-col a{color:var(--tx-2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  color:var(--tx-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px;}
  h1{font-size:36px;}
  .banner-inner{padding:44px 36px 38px;}
  .grid-b{gap:24px;}
  .cta-panel{padding:34px 32px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;row-gap:30px;}
}

@media (max-width:1023px){
  .sidebar{
    transform:translateX(-100%);
    transition:transform .28s var(--ease);
    width:78vw;
    max-width:320px;
    box-shadow:var(--shadow-lg);
  }
  .sidebar.open{transform:translateX(0);}
  .drawer-close{display:inline-flex;align-items:center;justify-content:center;}
  .mobile-bar{display:flex;}
  .content{margin-left:0;}
  .site-footer{margin-left:0;}
  .crumb{padding-top:20px;}
  h1{font-size:30px;}
  .lede{font-size:15.5px;}
  .section{padding:60px 0 0;}
  .sec-head h2{font-size:24px;}
  .grid-b{grid-template-columns:1fr;padding-bottom:32px;}
  .grid-b > .gcard:nth-child(even){margin-top:0;}
  .trio{grid-template-columns:1fr;}
  .cta-wrap{padding:60px 0 66px;}
  .cta-panel{flex-direction:column;align-items:flex-start;gap:26px;}
  .cta-copy h2{font-size:23px;}
}

@media (max-width:767px){
  .container{padding:0 20px;}
  body{font-size:15px;}
  .banner-inner{padding:34px 22px 30px;}
  h1{font-size:26px;}
  .lede{font-size:15px;}
  .banner-stats{gap:22px;}
  .stat b{font-size:19px;}
  .sec-head{margin-bottom:22px;}
  .sec-head h2{font-size:22px;}
  .gcard-body{padding:20px 18px 18px;}
  .gcard-body h3{font-size:18px;}
  .faq-item summary{padding:16px 18px;font-size:15px;}
  .faq-a{padding:0 18px 18px;font-size:14px;}
  .cta-panel{padding:26px 20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-about{max-width:none;}
}

@media (max-width:479px){
  .container{padding:0 16px;}
  h1{font-size:24px;}
  .eyebrow{font-size:11.5px;padding:5px 10px;}
  .brand-text{font-size:15px;}
  .chips{gap:8px;}
  .chip{font-size:12px;padding:0 11px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions .btn{width:100%;}
  .btn{min-height:44px;padding:0 20px;}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}