/* roulang page: index */
:root{
  --bg:#05070E;
  --bg-block:#0A1020;
  --panel:#0E1526;
  --panel-deep:#131C31;
  --line:rgba(140,170,255,0.14);
  --line-strong:rgba(56,225,255,0.35);
  --main:#38E1FF;
  --main-deep:#0E7FA8;
  --action:#FF7A29;
  --violet:#7C5CFF;
  --text:#C7D2E5;
  --text-2:#93A3BC;
  --text-3:#6C7C96;
  --radius:18px;
  --radius-lg:22px;
  --shadow:0 18px 50px rgba(0,0,0,0.45);
  --inner:inset 0 1px 0 rgba(255,255,255,0.06);
  --glow:0 0 0 1px rgba(56,225,255,0.35), 0 0 24px rgba(56,225,255,0.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-mono:"Chakra Petch","Rajdhani",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--main);
  outline-offset:2px;
  border-radius:6px;
}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4{margin:0;color:#EAF6FF;font-weight:750;line-height:1.2}
h1{font-size:clamp(30px,5vw,56px);font-weight:800;line-height:1.15}
h2{font-size:clamp(24px,3.4vw,38px)}
h3{font-size:clamp(19px,2vw,23px);font-weight:650}
p{margin:0}
ul{margin:0;padding:0;list-style:none}

.container{width:100%;max-width:1220px;margin:0 auto;padding:0 20px}
.section{padding:80px 0;position:relative}
.section--tight{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head .eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--main);
  opacity:.85;
  margin-bottom:10px;
  display:block;
}
.section-head p.lead{color:var(--text-2);font-size:15px;max-width:620px;margin-top:12px}
.text-link{color:var(--main);font-size:14px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.text-link .arw{transition:transform .22s var(--ease)}
.text-link:hover .arw{transform:translateX(4px)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  padding:13px 26px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#38E1FF 0%,#0E7FA8 100%);
  color:#03131A;
  box-shadow:0 8px 26px rgba(56,225,255,0.28),var(--inner);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(56,225,255,0.42),var(--inner)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(140,170,255,0.28);
  color:#DCE8FA;
}
.btn-ghost:hover{background:rgba(56,225,255,0.08);border-color:var(--line-strong);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}

/* ============ 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--main);
  background:rgba(56,225,255,0.10);
  border:1px solid rgba(56,225,255,0.25);
}
.badge--violet{color:#B8A8FF;background:rgba(124,92,255,0.12);border-color:rgba(124,92,255,0.30)}
.badge--action{color:var(--action);background:rgba(255,122,41,0.10);border-color:rgba(255,122,41,0.28)}
.badge--glass{background:rgba(5,7,14,0.66);border-color:rgba(140,170,255,0.22);color:#BFE9F7;backdrop-filter:blur(6px)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,7,14,0.55);
  backdrop-filter:blur(10px);
  transition:background-color .26s var(--ease),box-shadow .26s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(56,225,255,0) 0%,rgba(56,225,255,0.55) 45%,rgba(56,225,255,0) 100%);
}
.site-header.is-scrolled{background:rgba(5,7,14,0.82);backdrop-filter:blur(14px);box-shadow:0 10px 30px rgba(0,0,0,0.5)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;
  border:1px solid var(--line-strong);
  background:linear-gradient(140deg,rgba(56,225,255,0.18),rgba(124,92,255,0.12));
  color:var(--main);
  font-family:var(--font-mono);
  font-size:15px;font-weight:700;letter-spacing:.04em;
  box-shadow:0 0 18px rgba(56,225,255,0.18);
}
.brand-text{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:750;color:#EAF6FF;letter-spacing:.01em}
.brand-sep{width:1px;height:16px;background:rgba(140,170,255,0.32);display:inline-block}
.brand-sub{font-size:12px;color:var(--text-2);font-weight:500;letter-spacing:.12em}
.nav-main{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:#A9B7CC;
  border-radius:10px;
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--main);
  box-shadow:0 0 10px rgba(56,225,255,0.8);
  transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
  border-radius:2px;
}
.nav-link:hover{color:var(--main)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:#EAF6FF;text-shadow:0 0 14px rgba(56,225,255,0.55)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;left:50%;top:2px;width:4px;height:4px;margin-left:-2px;
  border-radius:50%;background:var(--main);box-shadow:0 0 8px rgba(56,225,255,0.9);
}
.nav-actions{display:flex;align-items:center;gap:18px;flex-shrink:0}
.nav-arrow{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:6px}
.nav-arrow:hover{color:var(--main)}
.nav-arrow .arw{transition:transform .22s var(--ease)}
.nav-arrow:hover .arw{transform:translateX(3px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);
  align-items:center;justify-content:center;
  background:rgba(14,21,38,0.7);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--main);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--main);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(5,7,14,0.97);
  backdrop-filter:blur(16px);
  display:flex;flex-direction:column;
  transform:translateY(-8px);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  color:var(--main);font-size:20px;display:grid;place-items:center;
  background:rgba(14,21,38,0.6);
}
.drawer-nav{padding:22px 20px;display:flex;flex-direction:column;flex:1;overflow-y:auto}
.drawer-nav a{
  display:flex;align-items:baseline;gap:14px;
  padding:18px 4px;
  font-size:19px;color:#D6E1F2;
  border-bottom:1px solid var(--line);
}
.drawer-nav a .idx{font-family:var(--font-mono);font-size:12px;color:var(--main);letter-spacing:.1em}
.drawer-nav a.is-active{color:var(--main)}
.drawer-foot{padding:18px 20px 26px;border-top:1px solid var(--line)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:72px 0 78px}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(760px 420px at 12% 8%,rgba(56,225,255,0.12),transparent 62%),
    radial-gradient(560px 340px at 88% 92%,rgba(124,92,255,0.10),transparent 66%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(140,170,255,0.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(140,170,255,0.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,0.7),transparent 78%);
  pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-title{margin:18px 0 0}
.hero-title .accent{color:var(--main);text-shadow:0 0 26px rgba(56,225,255,0.35)}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-2);max-width:600px;line-height:1.9}
.hero-cta{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:40px}
.mini-bar{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 16px;
  box-shadow:var(--inner);
}
.mini-bar .k{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--main);display:block;margin-bottom:5px}
.mini-bar .v{font-size:14px;color:#C9D6EA;line-height:1.6}

.hero-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.hero-visual img{width:100%;height:440px;object-fit:cover;opacity:.86}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,14,0.20) 0%,rgba(5,7,14,0.86) 100%),
             linear-gradient(90deg,rgba(5,7,14,0.55),transparent 60%);
}
.hero-visual .grid-layer{
  position:absolute;inset:0;z-index:2;
  background-image:linear-gradient(rgba(56,225,255,0.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(56,225,255,0.07) 1px,transparent 1px);
  background-size:38px 38px;
}
.glass-card{
  position:absolute;z-index:3;left:22px;right:22px;bottom:22px;
  background:rgba(14,21,38,0.62);
  backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--glow);
}
.glass-card .gc-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.glass-card .gc-title{font-size:15px;font-weight:650;color:#EAF6FF}
.gc-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 0;border-top:1px solid var(--line)}
.gc-row:first-of-type{border-top:0}
.gc-row .lbl{font-size:13.5px;color:var(--text-2)}
.gc-row .val{font-family:var(--font-mono);font-size:14px;color:var(--main)}
.gc-row .val.action{color:var(--action)}

/* ============ Bento 能力区 ============ */
.bento{display:grid;grid-template-columns:6fr 6fr;gap:22px}
.bento-main{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow),var(--inner);
  display:flex;flex-direction:column;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.bento-main:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.bento-main img{width:100%;height:250px;object-fit:cover}
.bento-main .bm-body{padding:26px}
.bento-main h3{margin-bottom:12px}
.bento-main p{color:var(--text-2);font-size:15px}
.bento-list{margin-top:18px;display:grid;gap:12px}
.bento-list li{display:flex;gap:10px;font-size:14.5px;color:#BFCDE2}
.bento-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--main);
  box-shadow:0 0 10px rgba(56,225,255,0.8);margin-top:10px;flex-shrink:0;
}
.bento-side{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.bento-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--inner);
  transition:border-color .24s var(--ease),transform .24s var(--ease),background-color .24s var(--ease);
  display:flex;flex-direction:column;gap:12px;
}
.bento-card:hover{border-color:var(--line-strong);transform:translateY(-3px);background:var(--panel-deep)}
.icon-box{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  border:1px solid rgba(56,225,255,0.30);
  background:rgba(56,225,255,0.08);
  color:var(--main);font-family:var(--font-mono);font-size:14px;
  transition:transform .24s var(--ease);
}
.bento-card:hover .icon-box{transform:translateX(4px)}
.bento-card h3{font-size:18px}
.bento-card p{color:var(--text-2);font-size:14.5px}
.num-list{display:grid;gap:14px;counter-reset:nl}
.num-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:#BFCDE2}
.num-list li .no{
  font-family:var(--font-mono);font-size:12px;color:var(--action);
  border:1px solid rgba(255,122,41,0.3);border-radius:8px;padding:2px 7px;flex-shrink:0;margin-top:3px;
}

/* ============ 数据条（玻璃） ============ */
.stat-strip{
  background:rgba(14,21,38,0.55);
  backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-lg);
  padding:32px 28px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
  box-shadow:var(--glow);
}
.stat-item{text-align:left;padding-right:18px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0;padding-right:0}
.stat-item .num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.2vw,38px);
  font-weight:700;color:var(--main);line-height:1.1;
  display:block;
}
.stat-item .num.action{color:var(--action)}
.stat-item .desc{font-size:13.5px;color:var(--text-2);margin-top:8px;line-height:1.65}

/* ============ 展示区 2+1 ============ */
.showcase{display:grid;grid-template-columns:7fr 5fr;gap:22px}
.show-card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  box-shadow:var(--shadow);
  display:block;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.show-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.show-card .thumb{position:relative;overflow:hidden}
.show-card .thumb img{width:100%;transition:transform .5s var(--ease);object-fit:cover}
.show-card:hover .thumb img{transform:scale(1.04)}
.show-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,7,14,0.05),rgba(5,7,14,0.78));
  transition:opacity .3s var(--ease);
}
.show-card:hover .thumb::after{opacity:.72}
.show-card .cat{position:absolute;top:14px;left:14px;z-index:2}
.show-card .body{padding:20px 22px 22px}
.show-card h3{transition:color .24s var(--ease);margin-bottom:8px}
.show-card:hover h3{color:var(--main)}
.show-card p{font-size:14.5px;color:var(--text-2)}
.show-card--big .thumb img{height:400px}
.show-col{display:grid;gap:22px}
.show-card--small{display:grid;grid-template-columns:150px 1fr;align-items:stretch}
.show-card--small .thumb img{height:100%;min-height:150px}
.show-card--small .body{padding:16px 18px;display:flex;flex-direction:column;justify-content:center}
.show-card--small h3{font-size:17px}

/* ============ 时间线 ============ */
.timeline{position:relative;padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--main),rgba(124,92,255,0.75));
  border-radius:2px;
}
.tl-item{position:relative;padding:0 0 34px 0}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-34px;top:8px;width:12px;height:12px;border-radius:50%;
  background:var(--main);box-shadow:0 0 0 4px rgba(56,225,255,0.12),0 0 16px rgba(56,225,255,0.8);
}
.tl-item .no{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--action);display:block;margin-bottom:6px}
.tl-item h3{font-size:19px;margin-bottom:8px}
.tl-item p{color:var(--text-2);font-size:15px;max-width:760px}

/* ============ 最新信息 ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--inner);
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.post-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.post-card .thumb{position:relative;overflow:hidden}
.post-card .thumb img{width:100%;height:186px;object-fit:cover;transition:transform .5s var(--ease)}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,14,0.05),rgba(5,7,14,0.55))}
.post-card .cat{position:absolute;top:12px;left:12px;z-index:2}
.post-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card h3{
  font-size:17px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .24s var(--ease);
}
.post-card:hover h3{color:var(--main)}
.post-card p{
  font-size:14px;color:var(--text-2);line-height:1.75;flex:1;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-3);font-family:var(--font-mono)}
.post-meta svg{width:14px;height:14px;flex-shrink:0;opacity:.8}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius);
  background:var(--panel);padding:34px 24px;text-align:center;
  max-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-state .ico{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;
  border:1px solid rgba(56,225,255,0.28);background:rgba(56,225,255,0.07);color:var(--main);
}
.empty-state p{color:var(--text-2);font-size:14.5px}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:background-color .22s var(--ease),border-color .22s var(--ease);
}
.faq-item:hover{background:var(--panel-deep)}
.faq-item.is-open{border-color:var(--line-strong)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:600;color:#E4EEFB;
}
.faq-q .bar{width:3px;height:20px;border-radius:2px;background:var(--main);box-shadow:0 0 12px rgba(56,225,255,0.7);flex-shrink:0}
.faq-q .txt{flex:1}
.faq-q .plus{
  width:26px;height:26px;position:relative;flex-shrink:0;
  border:1px solid rgba(140,170,255,0.28);border-radius:8px;
  transition:transform .26s var(--ease),border-color .26s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--main);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:11px;height:1.6px}
.faq-q .plus::after{width:1.6px;height:11px}
.faq-item.is-open .plus{transform:rotate(135deg);border-color:var(--line-strong)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .32s var(--ease);
  background:rgba(19,28,49,0.66);
  border-top:1px solid var(--line);
}
.faq-item.is-open .faq-a{max-height:320px}
.faq-a p{padding:18px 24px 22px;color:var(--text-2);font-size:15px}

/* ============ 联系 / CTA ============ */
.contact-wrap{
  position:relative;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--bg-block);overflow:hidden;
  display:grid;grid-template-columns:5fr 7fr;
}
.contact-wrap::before{
  content:"";position:absolute;top:-40%;right:-10%;width:62%;height:180%;
  background:linear-gradient(100deg,rgba(56,225,255,0.16),rgba(124,92,255,0.06) 45%,transparent 72%);
  transform:rotate(10deg);pointer-events:none;
}
.contact-wrap::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(140,170,255,0.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(140,170,255,0.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(420px 300px at 15% 20%,#000,transparent 70%);
}
.contact-info{position:relative;z-index:2;padding:44px 38px;border-right:1px solid var(--line)}
.contact-info h2{margin-bottom:14px}
.contact-info > p{color:var(--text-2);font-size:15px}
.contact-lines{margin-top:28px;display:grid;gap:18px}
.contact-line{display:flex;gap:14px;align-items:flex-start}
.contact-line .ci{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;display:grid;place-items:center;
  border:1px solid rgba(56,225,255,0.26);background:rgba(56,225,255,0.07);color:var(--main);
  font-family:var(--font-mono);font-size:13px;
}
.contact-line .ct{font-size:14px;color:var(--text-2);line-height:1.7}
.contact-line .ct strong{display:block;color:#E4EEFB;font-size:15px;font-weight:600;margin-bottom:2px}
.contact-form{position:relative;z-index:2;padding:44px 38px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;color:var(--text-2)}
.field input,.field select,.field textarea{
  width:100%;
  background:#0B1220;
  border:1px solid var(--line);
  border-radius:12px;
  color:#DCE8FA;
  font-size:14.5px;
  font-family:inherit;
  padding:13px 15px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
  appearance:none;
}
.field textarea{min-height:118px;resize:vertical;line-height:1.8}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--main);box-shadow:0 0 0 3px rgba(56,225,255,0.16);
}
.field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2338E1FF' stroke-width='2.4' stroke-linecap='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:40px;
}
.form-note{font-size:13px;color:var(--text-3);margin-top:14px}
.form-msg{
  margin-top:14px;font-size:14px;color:var(--action);
  display:none;
}
.form-msg.show{display:block}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-block);border-top:1px solid var(--line);padding:64px 0 28px;position:relative}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,225,255,0.45),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand .brand-text{font-size:17px}
.footer-col h4{font-size:15px;color:#E4EEFB;margin-bottom:16px;font-weight:650}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.85}
.footer-links{display:grid;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--main)}
.footer-domain{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  font-family:var(--font-mono);font-size:13px;color:var(--main);
  border:1px solid rgba(56,225,255,0.24);background:rgba(56,225,255,0.06);
  border-radius:999px;padding:6px 14px;
}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--main)}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:26px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(14,21,38,0.9);
  border:1px solid var(--line-strong);
  color:var(--main);
  box-shadow:0 0 20px rgba(56,225,255,0.25);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:0 0 26px rgba(56,225,255,0.5)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-main,.nav-arrow{display:none}
  .nav-toggle{display:flex}
  .nav-wrap{height:66px}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{height:340px}
  .bento{grid-template-columns:1fr}
  .showcase{grid-template-columns:1fr}
  .show-card--big .thumb img{height:300px}
  .stat-strip{grid-template-columns:1fr 1fr;gap:18px;padding:26px 22px}
  .stat-item:nth-child(2){border-right:0;padding-right:0}
  .stat-item:nth-child(3){border-right:1px solid var(--line)}
  .post-grid{grid-template-columns:1fr 1fr}
  .contact-wrap{grid-template-columns:1fr}
  .contact-info{border-right:0;border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .section{padding:56px 0}
}
@media (max-width:767px){
  .glass-card{left:14px;right:14px;bottom:14px;padding:16px}
  .hero-visual img{height:290px}
  .bento-side{grid-template-columns:1fr}
  .show-card--small{grid-template-columns:120px 1fr}
  .form-grid{grid-template-columns:1fr}
  .contact-info,.contact-form{padding:30px 22px}
  .post-grid{grid-template-columns:1fr}
  .post-card .thumb img{height:200px}
  .stat-strip{grid-template-columns:1fr 1fr;gap:16px}
  .stat-item{border-right:0;padding-right:0}
  .stat-item:nth-child(odd){border-right:1px solid var(--line);padding-right:16px}
  .stat-item:nth-child(3){border-right:1px solid var(--line);padding-right:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .section{padding:44px 0}
  .section-head{margin-bottom:26px}
}
@media (max-width:519px){
  .hero-cta .btn{width:100%}
  .hero-mini{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .stat-item{border-right:0;padding-right:0}
  .stat-item:nth-child(odd){border-right:0;padding-right:0}
  .timeline{padding-left:26px}
  .timeline::before{left:6px}
  .tl-item::before{left:-26px;width:10px;height:10px}
  .faq-q{padding:16px 16px;font-size:15.5px;gap:12px}
  .faq-a p{padding:16px 18px 20px}
  .show-card--small{grid-template-columns:1fr}
  .show-card--small .thumb img{height:170px}
}

/* roulang page: category1 */
:root{
  --bg:#05070E;
  --bg-section:#0A1020;
  --panel:#0E1526;
  --panel-2:#131C31;
  --input-bg:#0B1220;
  --line:rgba(140,170,255,.14);
  --line-strong:rgba(140,170,255,.26);
  --line-accent:rgba(56,225,255,.35);
  --primary:#38E1FF;
  --primary-deep:#0E7FA8;
  --accent:#FF7A29;
  --violet:#7C5CFF;
  --text:#C7D2E5;
  --text-2:#93A3BC;
  --text-3:#6C7C96;
  --heading:#EAF6FF;
  --radius-sm:12px;
  --radius:18px;
  --radius-lg:22px;
  --shadow:0 18px 50px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --glow:0 0 0 1px rgba(56,225,255,.35), 0 0 24px rgba(56,225,255,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-num:"Chakra Petch", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*,*::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:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(56,225,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(56,225,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 78%);
}
h1,h2,h3,h4{margin:0;color:var(--heading);line-height:1.25}
p{margin:0}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary);text-decoration:none;transition:color .22s var(--ease),opacity .22s var(--ease)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1220px;margin:0 auto;padding:0 20px;position:relative;z-index:2}
.section{padding:72px 0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,7,14,.55);
  border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),border-color .24s var(--ease),backdrop-filter .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,7,14,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom-color:var(--line-strong);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent 0%,rgba(56,225,255,.75) 30%,rgba(56,225,255,.35) 60%,transparent 100%);
}
.header-inner{display:flex;align-items:center;gap:22px;height:74px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line-accent);
  color:var(--primary);font-family:var(--font-num);font-size:14px;font-weight:700;letter-spacing:.06em;
  background:linear-gradient(150deg,rgba(56,225,255,.16),rgba(14,127,168,.05));
  box-shadow:0 0 18px rgba(56,225,255,.18) inset;
}
.brand-text{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:var(--heading);letter-spacing:.01em}
.brand-sep{width:1px;height:15px;background:var(--line-strong);display:inline-block}
.brand-sub{font-size:12px;font-weight:500;color:var(--text-2);letter-spacing:.02em}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:9px 15px;font-size:15px;color:#A9B7CC;
  border-radius:999px;transition:color .22s var(--ease),background .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;background:var(--primary);
  box-shadow:0 0 12px rgba(56,225,255,.85);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{
  color:var(--heading);
  text-shadow:0 0 12px rgba(56,225,255,.5);
}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";position:absolute;top:2px;left:50%;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);
}
.header-cta{display:inline-flex;align-items:center;gap:8px;flex-shrink:0}
.header-arrow{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:4px}
.header-arrow:hover{color:var(--primary)}
.header-arrow span{transition:transform .22s var(--ease)}
.header-arrow:hover span{transform:translateX(3px)}
.burger{
  display:none;width:40px;height:40px;border-radius:11px;border:1px solid var(--line-strong);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;flex-shrink:0;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.burger span{width:16px;height:2px;background:var(--text-2);border-radius:2px;display:block;transition:background .22s var(--ease)}
.burger:hover{border-color:var(--line-accent);box-shadow:var(--glow)}
.burger:hover span{background:var(--primary)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary) 0%,#1CA8CE 55%,var(--primary-deep) 100%);
  color:#03151B;
  box-shadow:0 0 0 1px rgba(56,225,255,.35),0 8px 26px rgba(56,225,255,.22);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(56,225,255,.5),0 12px 34px rgba(56,225,255,.4)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{
  background:rgba(56,225,255,.04);border:1px solid var(--line-strong);color:var(--text);
}
.btn-ghost:hover{background:rgba(56,225,255,.1);border-color:var(--line-accent);color:var(--heading);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-block{width:100%}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow span{transition:transform .22s var(--ease)}
.link-arrow:hover span{transform:translateX(3px)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--primary);
  background:rgba(56,225,255,.1);border:1px solid rgba(56,225,255,.25);
}
.tag-violet{color:#B9A9FF;background:rgba(124,92,255,.12);border-color:rgba(124,92,255,.32)}
.tag-accent{color:var(--accent);background:rgba(255,122,41,.12);border-color:rgba(255,122,41,.3)}
.tag-plain{color:var(--text-2);background:rgba(147,163,188,.08);border-color:var(--line-strong)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:18px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .current{color:var(--primary)}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;padding:58px 0 54px;border-bottom:1px solid var(--line)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(5,7,14,.97) 0%,rgba(5,7,14,.9) 42%,rgba(5,7,14,.68) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center 32%;background-repeat:no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(56,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(56,225,255,.05) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 90%);
}
.page-hero .container{position:relative;z-index:2}
.hero-eyebrow{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.page-hero h1{
  font-size:clamp(28px,4.4vw,50px);font-weight:800;line-height:1.18;letter-spacing:-.01em;
  max-width:900px;margin-bottom:18px;
}
.page-hero h1 em{font-style:normal;color:var(--primary);text-shadow:0 0 26px rgba(56,225,255,.35)}
.hero-lead{max-width:760px;font-size:16.5px;color:var(--text-2);line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.hero-stat{min-width:132px}
.hero-stat b{display:block;font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--primary);line-height:1.2}
.hero-stat span{font-size:13px;color:var(--text-3)}

/* ---------- layout ---------- */
.layout{display:grid;grid-template-columns:274px minmax(0,1fr);gap:52px;align-items:start;padding:68px 0 72px}

/* ---------- toc ---------- */
.toc{
  position:sticky;top:98px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow);
}
.toc-title{
  display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;
  color:var(--text-3);font-weight:700;margin-bottom:14px;
}
.toc-title::before{content:"";width:16px;height:2px;border-radius:2px;background:var(--primary);box-shadow:0 0 10px var(--primary)}
.toc-list li + li{border-top:1px solid var(--line)}
.toc-list a{
  display:flex;align-items:flex-start;gap:10px;padding:11px 8px;font-size:14.5px;color:var(--text-2);
  border-radius:10px;transition:background .22s var(--ease),color .22s var(--ease),padding-left .22s var(--ease);
}
.toc-list a:hover{background:var(--panel-2);color:var(--primary);padding-left:12px}
.toc-list .num{font-family:var(--font-num);font-size:13px;color:var(--text-3);flex-shrink:0;line-height:1.7}
.toc-list a:hover .num{color:var(--accent)}
.toc-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);line-height:1.75;
}
.toc-note a{display:inline-flex;align-items:center;gap:5px;margin-top:8px;font-size:13.5px}

/* ---------- article body ---------- */
.body-block{max-width:880px}
.section-block + .section-block{margin-top:58px}
.body-block h2{
  position:relative;font-size:clamp(22px,2.7vw,32px);font-weight:750;line-height:1.3;
  padding-left:18px;margin-bottom:20px;scroll-margin-top:104px;
}
.body-block h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--primary),var(--primary-deep));
  box-shadow:0 0 16px rgba(56,225,255,.45);
}
.body-block h3{font-size:19px;font-weight:650;margin:26px 0 10px;color:#DCEAF7}
.body-block p{color:var(--text);margin-bottom:16px;line-height:1.9}
.body-block p a{border-bottom:1px dashed rgba(56,225,255,.55)}
.body-block p a:hover{border-bottom-style:solid}
.plain-list{margin:8px 0 20px}
.plain-list li{
  position:relative;padding-left:22px;margin-bottom:12px;color:var(--text-2);line-height:1.85;
}
.plain-list li::before{
  content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:2px;
  background:var(--primary);opacity:.85;transform:rotate(45deg);
}
.plain-list li b{color:var(--heading);font-weight:600}
.plain-list.violet li::before{background:var(--violet)}

/* figure */
.figure{margin:26px 0 30px}
.figure-img{
  border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);
  background:var(--panel);position:relative;
  box-shadow:0 14px 38px rgba(0,0,0,.4);
}
.figure-img img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.figure-img:hover img{transform:scale(1.03)}
.figure figcaption{margin-top:12px;font-size:13px;color:var(--text-3);line-height:1.7}
.figure-badge{
  position:absolute;left:14px;top:14px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--heading);
  background:rgba(5,7,14,.72);border:1px solid var(--line-accent);backdrop-filter:blur(6px);
}

/* highlight card */
.callout{
  display:flex;gap:16px;padding:20px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--primary);
  margin:24px 0;box-shadow:var(--shadow);
}
.callout .ico{
  flex-shrink:0;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line-accent);color:var(--primary);font-family:var(--font-num);font-size:14px;font-weight:700;
  background:rgba(56,225,255,.08);
}
.callout p{margin:0;font-size:15.5px;color:var(--text-2)}
.callout p b{color:var(--heading)}

/* table */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:24px 0 8px;
  background:var(--panel);box-shadow:var(--shadow);
}
.table-scroll{overflow-x:auto}
table.data-table{width:100%;border-collapse:collapse;min-width:640px;font-size:14.5px}
table.data-table thead th{
  text-align:left;padding:15px 18px;font-size:12.5px;letter-spacing:.08em;font-weight:700;
  color:var(--primary);background:var(--panel-2);border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
table.data-table tbody td{
  padding:14px 18px;color:var(--text-2);border-bottom:1px solid var(--line);vertical-align:top;line-height:1.75;
}
table.data-table tbody tr:nth-child(even){background:rgba(19,28,49,.55)}
table.data-table tbody tr:hover{background:var(--panel-2)}
table.data-table tbody tr:last-child td{border-bottom:0}
table.data-table td:first-child{color:var(--heading);font-weight:600;white-space:nowrap}
.table-caption{padding:12px 18px;font-size:12.5px;color:var(--text-3);border-top:1px solid var(--line);background:rgba(10,16,32,.6)}

/* steps */
.steps{position:relative;margin:26px 0 10px;padding-left:34px}
.steps::before{
  content:"";position:absolute;left:9px;top:10px;bottom:10px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--violet));
  opacity:.7;
}
.step{position:relative;padding:0 0 24px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:-30px;top:9px;width:10px;height:10px;border-radius:50%;
  background:var(--bg);border:2px solid var(--primary);box-shadow:0 0 12px rgba(56,225,255,.75);
}
.step-num{font-family:var(--font-num);font-size:12.5px;font-weight:700;color:var(--accent);letter-spacing:.1em}
.step h3{margin:4px 0 6px;font-size:18px;font-weight:650;color:var(--heading)}
.step p{margin:0;font-size:15px;color:var(--text-2);line-height:1.8}

/* cross link cards */
.cross-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:20px}
.cross-card{
  display:block;padding:22px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.cross-card:hover{transform:translateY(-3px);border-color:var(--line-accent);box-shadow:var(--glow),0 18px 44px rgba(0,0,0,.4)}
.cross-card .label{font-size:12px;letter-spacing:.14em;color:var(--text-3);font-weight:700}
.cross-card h3{margin:10px 0 8px;font-size:19px;font-weight:650;color:var(--heading);transition:color .22s var(--ease)}
.cross-card:hover h3{color:var(--primary)}
.cross-card p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-bottom:14px}

/* CTA band */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--line-strong);background:var(--panel);
  padding:40px;margin-top:64px;box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,rgba(56,225,255,.12) 0%,transparent 42%,transparent 62%,rgba(124,92,255,.14) 100%);
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(56,225,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(56,225,255,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:linear-gradient(120deg,#000,transparent 75%);
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.cta-inner h2{font-size:clamp(21px,2.5vw,29px);font-weight:750;margin-bottom:10px}
.cta-inner p{max-width:560px;font-size:15px;color:var(--text-2);line-height:1.85}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:80px;background:var(--bg-section);
  border-top:1px solid var(--line);padding:62px 0 26px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,225,255,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--heading);margin-bottom:16px;letter-spacing:.02em}
.footer-col p{font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px}
.footer-domain{
  display:inline-block;margin-top:14px;font-family:var(--font-num);font-size:13px;color:var(--primary);
  padding:4px 12px;border-radius:999px;background:rgba(56,225,255,.08);border:1px solid rgba(56,225,255,.22);
}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2)}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;z-index:70;
  background:var(--panel);border:1px solid var(--line-accent);color:var(--primary);
  box-shadow:0 0 0 1px rgba(56,225,255,.22),0 10px 30px rgba(0,0,0,.5);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{box-shadow:var(--glow);background:var(--panel-2)}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0;z-index:120;background:rgba(5,7,14,.97);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  display:flex;flex-direction:column;
  transform:translateY(-100%);transition:transform .32s var(--ease);
}
.drawer.is-open{transform:translateY(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--line-accent);color:var(--primary);
  font-size:20px;line-height:1;display:grid;place-items:center;background:rgba(56,225,255,.06);
}
.drawer-close:hover{box-shadow:var(--glow)}
.drawer-nav{flex:1;overflow-y:auto;padding:14px 20px}
.drawer-link{
  display:flex;align-items:center;gap:14px;padding:18px 6px;font-size:17px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-link .idx{font-family:var(--font-num);font-size:13px;color:var(--text-3)}
.drawer-link.is-active{color:var(--primary);text-shadow:0 0 14px rgba(56,225,255,.4)}
.drawer-foot{padding:18px 20px 26px;border-top:1px solid var(--line);background:rgba(10,16,32,.7)}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-main,.header-arrow{display:none}
  .burger{display:flex}
  .header-inner{height:66px;gap:12px}
  .layout{grid-template-columns:minmax(0,1fr);gap:34px;padding:48px 0 56px}
  .toc{position:static;order:-1}
  .section{padding:56px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}
  .cta-band{padding:30px}
  .step::before{width:8px;height:8px;left:-29px}
}
@media (max-width:767px){
  body{font-size:16px}
  .page-hero{padding:40px 0 38px}
  .hero-stats{gap:20px}
  .hero-stat b{font-size:22px}
  .cross-grid{grid-template-columns:minmax(0,1fr)}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .header-cta .btn{padding:10px 16px;font-size:14px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .brand-sub{display:none}
  .hero-actions .btn{width:100%}
  .callout{flex-direction:column;gap:12px}
  .table-wrap{margin-left:-16px;margin-right:-16px;border-radius:0;border-left:0;border-right:0}
  .to-top{right:16px;bottom:16px;width:42px;height:42px}
}

/* roulang page: article */
:root{
  --bg:#05070E;
  --bg-2:#0A1020;
  --panel:#0E1526;
  --panel-2:#131C31;
  --field:#0B1220;
  --line:rgba(140,170,255,0.14);
  --line-strong:rgba(56,225,255,0.35);
  --c1:#38E1FF;
  --c1-deep:#0E7FA8;
  --accent:#FF7A29;
  --violet:#7C5CFF;
  --text:#C7D2E5;
  --text-2:#93A3BC;
  --text-3:#6C7C96;
  --nav-link:#A9B7CC;
  --radius:18px;
  --radius-lg:22px;
  --shadow:0 18px 50px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.06);
  --glow:0 0 0 1px rgba(56,225,255,0.35), 0 0 24px rgba(56,225,255,0.28);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(900px 420px at 78% -8%,rgba(56,225,255,0.10),transparent 65%),
    radial-gradient(700px 360px at 6% 4%,rgba(124,92,255,0.10),transparent 70%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
:focus-visible{outline:2px solid var(--c1);outline-offset:2px;border-radius:6px}
.container{max-width:1220px;margin:0 auto;padding:0 20px;position:relative;z-index:1}
.mono{font-family:"Chakra Petch",ui-monospace,SFMono-Regular,Menlo,monospace}

/* ---------- progress ---------- */
#progressBar{position:fixed;top:0;left:0;height:2px;width:0;z-index:120;
  background:linear-gradient(90deg,var(--c1),var(--violet));
  box-shadow:0 0 12px rgba(56,225,255,.6);transition:width .1s linear}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(5,7,14,.62);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);transition:background .24s var(--ease)}
.site-header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,225,255,.5),transparent)}
.site-header.is-scrolled{background:rgba(5,7,14,.86)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  font-family:ui-monospace,Menlo,monospace;font-weight:700;font-size:14px;color:var(--c1);
  border:1px solid var(--line-strong);
  background:linear-gradient(160deg,rgba(56,225,255,.16),rgba(124,92,255,.10));
  box-shadow:0 0 18px rgba(56,225,255,.18)}
.brand-text{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;color:#EAF6FF;letter-spacing:.01em}
.brand-sep{width:1px;height:14px;background:var(--line-strong);display:inline-block}
.brand-sub{font-size:12px;font-weight:500;color:var(--text-2)}
.nav-main{display:flex;align-items:center;gap:30px}
.nav-link{position:relative;padding:6px 2px;font-size:15px;color:var(--nav-link);
  transition:color .22s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;
  background:var(--c1);box-shadow:0 0 10px rgba(56,225,255,.75);
  transition:width .24s var(--ease)}
.nav-link:hover{color:var(--c1)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:#EAF6FF;text-shadow:0 0 12px rgba(56,225,255,.35)}
.nav-link.is-active::after{width:100%}
.nav-link.is-active::before{content:"";position:absolute;top:-8px;left:50%;transform:translateX(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--c1);box-shadow:0 0 8px var(--c1)}
.nav-actions{display:flex;align-items:center;gap:18px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line-strong);
  background:transparent;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c1);border-radius:2px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .24s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease)}
.btn-primary{background:linear-gradient(135deg,#38E1FF,#0E7FA8);color:#02141C;
  box-shadow:0 0 0 1px rgba(56,225,255,.35),0 0 24px rgba(56,225,255,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(56,225,255,.55),0 0 34px rgba(56,225,255,.45)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:#DDF3FF}
.btn-ghost:hover{background:rgba(56,225,255,.08);border-color:var(--c1)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-block{width:100%}
.btn-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c1)}
.btn-arrow .arrow{transition:transform .24s var(--ease)}
.btn-arrow:hover .arrow{transform:translateX(3px)}

/* ---------- tags ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:999px;
  font-size:12px;color:var(--c1);background:rgba(56,225,255,.10);
  border:1px solid rgba(56,225,255,.25);white-space:nowrap}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;
  padding:22px 20px 28px;background:rgba(5,7,14,.97);
  backdrop-filter:blur(10px);opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;
  border-bottom:1px solid var(--line)}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line-strong);
  background:transparent;color:var(--c1);font-size:16px;cursor:pointer;box-shadow:0 0 18px rgba(56,225,255,.2)}
.drawer-nav{display:flex;flex-direction:column;margin-top:12px}
.drawer-link{display:flex;align-items:center;gap:14px;padding:18px 4px;font-size:16.5px;
  color:#DCE8F8;border-bottom:1px solid var(--line);transition:color .22s var(--ease),background .22s var(--ease)}
.drawer-link:hover,.drawer-link.is-active{color:var(--c1)}
.drawer-link .num{font-family:ui-monospace,Menlo,monospace;font-size:12px;color:var(--text-3)}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  padding:24px 0 6px;font-size:13px;color:var(--text-3)}
.crumb a{color:var(--text-2);transition:color .2s var(--ease)}
.crumb a:hover{color:var(--c1)}
.crumb .sep{color:rgba(140,170,255,.35)}
.crumb .current{max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text-2)}

/* ---------- article head ---------- */
.article-head{position:relative;padding:16px 0 34px;border-bottom:1px solid var(--line)}
.article-head::before{content:"";position:absolute;top:-40px;left:-10%;width:70%;height:220px;
  background:radial-gradient(closest-side,rgba(56,225,255,.12),transparent 72%);pointer-events:none}
.article-title{position:relative;margin:16px 0 18px;font-size:clamp(26px,3.8vw,44px);
  font-weight:800;line-height:1.25;color:#EAF6FF;letter-spacing:.005em;max-width:900px}
.meta-row{position:relative;display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13.5px;color:var(--text-2)}
.meta-item{display:inline-flex;align-items:center;gap:8px}
.meta-item::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--c1);
  box-shadow:0 0 8px rgba(56,225,255,.8);flex-shrink:0}
.meta-item.is-time::before{background:var(--accent);box-shadow:0 0 8px rgba(255,122,41,.8)}

/* ---------- layout ---------- */
.article-layout{display:grid;grid-template-columns:238px minmax(0,1fr);gap:44px;
  align-items:start;padding:44px 0 0}
.article-aside{min-width:0}
.side-card{position:sticky;top:96px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.side-title{font-size:13px;font-weight:600;color:#EAF6FF;letter-spacing:.08em;margin-bottom:14px}
.toc-list{display:flex;flex-direction:column;gap:2px;margin-bottom:16px}
.toc-link{font-size:13.5px;line-height:1.6;color:var(--text-2);padding:7px 0 7px 12px;
  border-left:1px solid var(--line);transition:color .2s var(--ease),border-color .2s var(--ease),padding-left .2s var(--ease);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.toc-link:hover{color:var(--c1);border-color:var(--c1);padding-left:15px}
.toc-empty{font-size:13px;color:var(--text-3);line-height:1.7;margin-bottom:16px}
.side-info{border-top:1px solid var(--line);padding-top:14px;margin-bottom:16px;
  display:flex;flex-direction:column;gap:10px}
.side-info div{display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--text-3)}
.side-info strong{color:var(--text-2);font-weight:500;text-align:right;
  max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- article body ---------- */
.article-col{min-width:0;max-width:820px}
.article-body{font-size:17px;line-height:1.9;color:var(--text);word-wrap:break-word}
.article-body p{margin:0 0 1.25em}
.article-body h2{position:relative;margin:2.2em 0 .9em;padding-left:16px;
  font-size:clamp(21px,2.4vw,27px);font-weight:750;line-height:1.4;color:#EAF6FF;scroll-margin-top:96px}
.article-body h2::before{content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--c1),var(--violet))}
.article-body h3{margin:1.7em 0 .7em;font-size:19px;font-weight:650;line-height:1.5;color:#E4EFFB}
.article-body h4{margin:1.4em 0 .6em;font-size:17px;font-weight:650;color:#DDEAFA}
.article-body ul,.article-body ol{margin:0 0 1.35em;padding-left:1.5em}
.article-body li{margin:.42em 0}
.article-body ul li::marker{color:var(--c1)}
.article-body ol li::marker{color:var(--accent);font-weight:700;font-family:ui-monospace,Menlo,monospace}
.article-body strong{color:#EAF6FF;font-weight:650}
.article-body blockquote{margin:1.6em 0;padding:16px 22px;border-left:3px solid var(--c1);
  background:rgba(56,225,255,.06);border-radius:0 14px 14px 0;color:#D8E6F7;letter-spacing:.01em}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--c1);border-bottom:1px dashed rgba(56,225,255,.6);transition:border-color .2s var(--ease)}
.article-body a:hover{border-bottom-style:solid}
.article-body img{margin:1.6em auto;border-radius:14px;border:1px solid var(--line)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:9px;font-size:13px;color:var(--text-3);text-align:center}
.article-body code{padding:2px 7px;border-radius:6px;background:var(--panel-2);
  font-family:ui-monospace,Menlo,monospace;font-size:14px;color:#9FE9FF}
.article-body pre{margin:1.6em 0;padding:18px 20px;border-radius:14px;background:var(--panel-2);
  border:1px solid var(--line);overflow-x:auto;font-size:14px;line-height:1.7}
.article-body pre code{background:none;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden}
.article-body thead th{background:var(--panel-2);color:#EAF6FF;font-weight:600;text-align:left;
  padding:12px 14px;border-bottom:1px solid var(--line)}
.article-body td{padding:11px 14px;border-bottom:1px solid var(--line);color:var(--text)}
.article-body tbody tr:nth-child(even){background:rgba(140,170,255,.045)}
.article-body hr{border:none;height:1px;background:var(--line);margin:2.2em 0}
.article-foot{display:flex;gap:14px;flex-wrap:wrap;margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}

/* ---------- empty ---------- */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  min-height:220px;max-height:260px;padding:34px 22px;text-align:center;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg)}
.empty-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--c1);font-family:ui-monospace,monospace;
  font-weight:700;box-shadow:0 0 20px rgba(56,225,255,.18)}
.empty-state p{font-size:15px;color:var(--text-2);margin:0}

/* ---------- sections ---------- */
.section{padding:76px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.section-head h2{font-size:clamp(22px,3vw,32px);font-weight:750;color:#EAF6FF;line-height:1.25}
.section-sub{margin-top:12px;font-size:15px;color:var(--text-2);max-width:640px}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:28px}
.related-card{display:flex;flex-direction:column;overflow:hidden;background:var(--panel);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.related-card:hover{transform:translateY(-3px);border-color:var(--line-strong);
  box-shadow:0 22px 54px rgba(0,0,0,.5),0 0 24px rgba(56,225,255,.16)}
.rc-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--panel-2)}
.rc-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s var(--ease),filter .35s var(--ease)}
.related-card:hover .rc-media img{transform:scale(1.04);filter:brightness(1.06)}
.rc-tag{position:absolute;top:12px;left:12px;padding:5px 11px;border-radius:999px;font-size:12px;
  color:#DDF3FF;background:rgba(5,7,14,.74);border:1px solid var(--line-strong);backdrop-filter:blur(6px)}
.rc-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.rc-title{margin-bottom:9px;font-size:16.5px;font-weight:650;line-height:1.5;color:#EAF6FF;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .22s var(--ease)}
.related-card:hover .rc-title{color:var(--c1)}
.rc-text{font-size:13.5px;line-height:1.75;color:var(--text-2);margin-bottom:14px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rc-meta{margin-top:auto;font-size:12.5px;color:var(--text-3);
  display:flex;align-items:center;gap:8px}
.rc-meta::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--accent)}

/* ---------- cta band ---------- */
.cta-band{padding:0}
.cta-inner{position:relative;overflow:hidden;margin-top:84px;padding:46px 44px;border-radius:var(--radius-lg);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:32px;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat,var(--panel)}
.cta-inner::before{content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(90deg,rgba(140,170,255,.07) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(0deg,rgba(140,170,255,.07) 0 1px,transparent 1px 46px),
    linear-gradient(180deg,rgba(5,7,14,.78),rgba(5,7,14,.94))}
.cta-inner::after{content:"";position:absolute;top:-70%;left:-12%;width:62%;height:240%;
  transform:rotate(18deg);pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(56,225,255,.12),transparent)}
.cta-inner>*{position:relative;z-index:1}
.cta-copy h2{font-size:clamp(21px,2.6vw,30px);font-weight:750;color:#EAF6FF;margin-bottom:12px;line-height:1.3}
.cta-copy p{font-size:15px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{position:relative;z-index:1;margin-top:88px;padding:64px 0 28px;
  background:var(--bg-2);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:15px;font-weight:650;color:#EAF6FF;margin-bottom:16px}
.footer-col p{font-size:14px;line-height:1.85;color:var(--text-2)}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease),transform .2s var(--ease);
  display:inline-block}
.footer-links a:hover{color:var(--c1);transform:translateX(2px)}
.footer-domain{display:inline-block;margin-top:14px;font-size:13px;color:var(--text-3);
  font-family:ui-monospace,Menlo,monospace}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3)}
.footer-bottom a{color:var(--text-2);transition:color .2s var(--ease)}
.footer-bottom a:hover{color:var(--c1)}

/* ---------- back to top ---------- */
#toTop{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;border:1px solid var(--line-strong);cursor:pointer;
  background:rgba(14,21,38,.9);color:var(--c1);font-size:17px;z-index:70;
  opacity:0;pointer-events:none;transition:opacity .2s var(--ease),transform .2s var(--ease),box-shadow .24s var(--ease)}
#toTop.show{opacity:1;pointer-events:auto}
#toTop:hover{transform:translateY(-2px);box-shadow:var(--glow)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .related-grid{gap:20px}
}
@media (max-width:1023px){
  .nav-main,.nav-actions{display:none}
  .nav-toggle{display:flex}
  .article-layout{grid-template-columns:1fr;gap:26px;padding-top:32px}
  .article-aside{order:-1}
  .side-card{position:static}
  .article-col{max-width:100%}
  .article-body{font-size:16.5px}
  .section{padding:56px 0 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:34px 26px;margin-top:60px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:639px){
  .container{padding:0 16px}
  .nav-inner{height:64px}
  .brand-text{font-size:16px}
  .article-head{padding:10px 0 26px}
  .article-title{font-size:24px}
  .article-body h2{font-size:20px}
  .crumb .current{max-width:180px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .article-foot .btn,.cta-actions .btn,.side-card .btn{width:100%}
  .cta-actions{width:100%}
  #toTop{right:16px;bottom:16px}
}

/* roulang page: category2 */
:root{
    --bg:#05070E;
    --bg-soft:#0A1020;
    --panel:#0E1526;
    --panel-2:#131C31;
    --line:rgba(140,170,255,0.14);
    --line-strong:rgba(56,225,255,0.35);
    --cyan:#38E1FF;
    --cyan-deep:#0E7FA8;
    --amber:#FF7A29;
    --violet:#7C5CFF;
    --text:#C7D2E5;
    --text-2:#93A3BC;
    --text-3:#6C7C96;
    --radius:18px;
    --radius-lg:22px;
    --shadow:0 18px 50px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
    --glow:0 0 0 1px rgba(56,225,255,.35), 0 0 24px rgba(56,225,255,.28);
    --ease:cubic-bezier(.2,.7,.3,1);
    --font-num:"Chakra Petch","Rajdhani",ui-monospace,SFMono-Regular,Menlo,monospace;
  }

  *,*::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:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body::before{
    content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
    background:
      radial-gradient(900px 480px at 12% -8%,rgba(56,225,255,.10),transparent 62%),
      radial-gradient(720px 420px at 92% 2%,rgba(124,92,255,.09),transparent 64%);
  }
  body::after{
    content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
    background-image:
      linear-gradient(rgba(140,170,255,.05) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.05) 1px,transparent 1px);
    background-size:56px 56px;
    -webkit-mask-image:radial-gradient(78% 58% at 50% 0%,#000 18%,transparent 82%);
    mask-image:radial-gradient(78% 58% at 50% 0%,#000 18%,transparent 82%);
  }
  img{max-width:100%;display:block;border:0}
  a{color:inherit;text-decoration:none}
  button,input,select,textarea{font:inherit;color:inherit}
  h1,h2,h3,h4,p,ol,ul,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  table{border-collapse:separate}
  :focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1220px;margin:0 auto;padding:0 20px;position:relative}
  main{position:relative;z-index:1}
  .section{padding:80px 0}
  .section-sm{padding:56px 0}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:70;
    background:rgba(5,7,14,.55);
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
    transition:background .26s var(--ease),backdrop-filter .26s var(--ease);
  }
  .site-header::after{
    content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
    background:linear-gradient(90deg,transparent,rgba(56,225,255,.55) 32%,rgba(124,92,255,.35) 66%,transparent);
    opacity:.75;pointer-events:none;
  }
  .site-header.is-scrolled{
    background:rgba(5,7,14,.82);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
  }
  .header-inner{display:flex;align-items:center;gap:26px;height:76px}
  .brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
  .brand-mark{
    width:38px;height:38px;border-radius:10px;
    border:1px solid var(--line-strong);
    display:grid;place-items:center;
    font-family:var(--font-num);font-size:15px;font-weight:700;letter-spacing:.02em;
    color:var(--cyan);
    background:linear-gradient(160deg,rgba(56,225,255,.18),rgba(56,225,255,.02));
    box-shadow:0 0 18px rgba(56,225,255,.18);
  }
  .brand-text{
    font-size:17px;font-weight:700;color:#EAF6FF;
    display:flex;align-items:center;gap:10px;letter-spacing:.01em;white-space:nowrap;
  }
  .brand-sep{width:1px;height:14px;background:var(--line-strong);display:inline-block}
  .brand-sub{font-size:12px;font-weight:500;color:var(--text-2)}

  .nav-main{display:flex;align-items:center;gap:4px;margin-left:6px;flex:1 1 auto}
  .nav-link{
    position:relative;padding:10px 14px;font-size:15px;color:#A9B7CC;border-radius:999px;
    transition:color .22s var(--ease),background .22s var(--ease);white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--cyan),var(--violet));
    transform:scaleX(0);transform-origin:left;
    transition:transform .24s var(--ease);
    box-shadow:0 0 10px rgba(56,225,255,.6);
  }
  .nav-link:hover{color:var(--cyan)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:#EAF6FF;text-shadow:0 0 12px rgba(56,225,255,.45)}
  .nav-link.is-active::after{transform:scaleX(1)}
  .nav-link.is-active::before{
    content:"";position:absolute;top:1px;left:50%;transform:translateX(-50%);
    width:4px;height:4px;border-radius:50%;background:var(--cyan);
    box-shadow:0 0 8px rgba(56,225,255,.9);
  }
  .header-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    border:1px solid var(--line-strong);background:rgba(14,21,38,.8);
    cursor:pointer;place-items:center;gap:4px;padding:0;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--cyan);border-radius:2px;margin:3px auto;transition:transform .22s var(--ease),opacity .22s var(--ease)}

  /* 抽屉 */
  .nav-drawer{
    position:fixed;inset:0;z-index:90;
    background:linear-gradient(180deg,#05070E 0%,#0A1020 100%);
    display:flex;flex-direction:column;
    padding:22px 22px 0;
    transform:translateX(100%);visibility:hidden;
    transition:transform .3s var(--ease),visibility .3s var(--ease);
  }
  .nav-drawer.is-open{transform:translateX(0);visibility:visible}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}
  .drawer-close{
    width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
    background:rgba(14,21,38,.8);color:var(--cyan);cursor:pointer;display:grid;place-items:center;font-size:18px;
  }
  .drawer-links{flex:1 1 auto;overflow-y:auto;padding:18px 0}
  .drawer-links a{
    display:flex;align-items:center;gap:16px;
    padding:18px 4px;font-size:19px;font-weight:600;color:#DCE7F7;
    border-bottom:1px solid var(--line);
    transition:color .2s var(--ease),padding-left .2s var(--ease);
  }
  .drawer-links a:hover,.drawer-links a.is-active{color:var(--cyan);padding-left:10px}
  .drawer-links .no{font-family:var(--font-num);font-size:13px;color:var(--amber);width:26px;flex:0 0 auto}
  .drawer-cta{padding:18px 0 26px;border-top:1px solid var(--line)}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;font-weight:600;font-size:15px;padding:12px 24px;
    border:1px solid transparent;cursor:pointer;white-space:nowrap;
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));
    color:#04141C;font-weight:700;
    box-shadow:0 0 0 1px rgba(56,225,255,.35),0 0 22px rgba(56,225,255,.28);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(56,225,255,.55),0 0 34px rgba(56,225,255,.42)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{background:transparent;border-color:rgba(140,170,255,.3);color:#DCE7F7}
  .btn-ghost:hover{background:rgba(56,225,255,.08);border-color:var(--line-strong);color:#EAF6FF}
  .btn-sm{padding:9px 18px;font-size:14px}
  .btn-block{width:100%}

  .arrow-link{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--cyan);font-size:14.5px;font-weight:600;margin-top:14px;
  }
  .arrow-link .a{transition:transform .22s var(--ease)}
  .arrow-link:hover .a{transform:translateX(3px)}
  .link-dash{color:var(--cyan);border-bottom:1px dashed rgba(56,225,255,.5);transition:border-color .2s var(--ease)}
  .link-dash:hover{border-bottom-style:solid;border-bottom-color:var(--cyan)}

  .tag-badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;border-radius:999px;font-size:12px;
    background:rgba(56,225,255,.1);color:var(--cyan);
    border:1px solid rgba(56,225,255,.25);
  }

  /* ============ 分类页页首 ============ */
  .page-hero{position:relative;overflow:hidden;padding:58px 0 48px;border-bottom:1px solid var(--line)}
  .page-hero-bg{
    position:absolute;inset:0;
    background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
    opacity:.26;
  }
  .page-hero-mask{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,7,14,.76),rgba(5,7,14,.92) 58%,var(--bg) 100%);
  }
  .page-hero-mask::after{
    content:"";position:absolute;inset:0;opacity:.6;
    background-image:
      linear-gradient(rgba(140,170,255,.06) 1px,transparent 1px),
      linear-gradient(90deg,rgba(140,170,255,.06) 1px,transparent 1px);
    background-size:44px 44px;
    -webkit-mask-image:radial-gradient(60% 70% at 50% 40%,#000 10%,transparent 78%);
    mask-image:radial-gradient(60% 70% at 50% 40%,#000 10%,transparent 78%);
  }
  .hero-inner{position:relative;z-index:2;max-width:880px;margin:0 auto;text-align:center}
  .crumb{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
  .crumb a{color:var(--text-2);transition:color .2s var(--ease)}
  .crumb a:hover{color:var(--cyan)}
  .crumb .sep{color:#3B4A63}
  .page-hero h1{
    font-size:clamp(28px,4.4vw,46px);font-weight:800;line-height:1.2;color:#F2F8FF;
    letter-spacing:.01em;
  }
  .page-hero h1 em{font-style:normal;color:var(--cyan);text-shadow:0 0 22px rgba(56,225,255,.35)}
  .hero-lead{margin:18px auto 0;max-width:720px;font-size:16.5px;line-height:1.9;color:var(--text-2)}
  .hero-actions{margin-top:28px;display:flex;justify-content:center;flex-wrap:wrap;gap:14px}

  /* 展示型标签条 */
  .tag-bar-wrap{position:relative;z-index:2;border-bottom:1px solid var(--line);background:rgba(10,16,32,.6)}
  .tag-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:18px 0}
  .tag-chip{
    padding:8px 16px;border-radius:999px;font-size:13.5px;color:var(--text-2);
    border:1px solid var(--line);background:rgba(14,21,38,.7);
    transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
  }
  .tag-chip:hover{color:var(--cyan);border-color:var(--line-strong);background:rgba(56,225,255,.08)}
  .tag-chip.is-on{color:var(--cyan);border-color:var(--line-strong);background:rgba(56,225,255,.1)}

  /* ============ 板块标题 ============ */
  .section-head{margin-bottom:34px;max-width:760px}
  .section-head h2{
    position:relative;padding-left:18px;
    font-size:clamp(23px,3.2vw,32px);font-weight:750;line-height:1.3;color:#EAF6FF;
  }
  .section-head h2::before{
    content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:3px;
    background:linear-gradient(180deg,var(--cyan),var(--violet));
    box-shadow:0 0 14px rgba(56,225,255,.4);
  }
  .section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px}

  /* ============ 图文卡片 ============ */
  .card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .media-card{
    background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;
    transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
  }
  .media-card:hover{
    transform:translateY(-4px);
    border-color:var(--line-strong);
    box-shadow:0 0 0 1px rgba(56,225,255,.26),0 22px 50px rgba(0,0,0,.5);
  }
  .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#0E1526,#131C31)}
  .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease),filter .45s var(--ease)}
  .media-card:hover .thumb img{transform:scale(1.04)}
  .thumb::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(5,7,14,.15),rgba(5,7,14,.68));
    transition:opacity .35s var(--ease);
  }
  .media-card:hover .thumb::after{opacity:.72}
  .thumb-tag{
    position:absolute;left:14px;top:14px;z-index:2;
    padding:5px 12px;border-radius:999px;font-size:12px;
    color:#D9F6FF;border:1px solid rgba(56,225,255,.3);
    background:rgba(5,7,14,.72);
    -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  }
  .card-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1 1 auto}
  .card-body h3{font-size:19px;font-weight:650;color:#EAF6FF;line-height:1.5}
  .card-body p{margin-top:10px;font-size:15px;color:var(--text-2);line-height:1.85}
  .card-body .arrow-link{margin-top:auto;padding-top:16px}

  /* ============ 数据条（玻璃） ============ */
  .stat-bar{
    display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;
    padding:28px 30px;border-radius:var(--radius-lg);
    border:1px solid rgba(140,170,255,.18);
    background:linear-gradient(135deg,rgba(20,32,58,.74),rgba(10,16,32,.62));
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    box-shadow:var(--shadow);
  }
  .stat-item{border-left:1px solid var(--line);padding-left:20px}
  .stat-item:first-child{border-left:0;padding-left:0}
  .stat-num{font-family:var(--font-num);font-size:clamp(26px,3.4vw,36px);font-weight:700;line-height:1.1;color:var(--cyan);letter-spacing:.02em}
  .stat-num.amber{color:var(--amber)}
  .stat-lbl{margin-top:8px;font-size:13.5px;color:var(--text-3);line-height:1.7}

  /* ============ 步骤 ============ */
  .step-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;position:relative}
  .step-card{
    position:relative;background:var(--panel);border:1px solid var(--line);
    border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);
    transition:border-color .24s var(--ease),transform .24s var(--ease);
  }
  .step-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
  .step-card .idx{
    width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
    font-family:var(--font-num);font-weight:700;font-size:15px;color:#04141C;
    background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));
    box-shadow:0 0 18px rgba(56,225,255,.28);margin-bottom:16px;
  }
  .step-card h3{font-size:17.5px;font-weight:650;color:#EAF6FF}
  .step-card p{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.85}
  .step-card::after{
    content:"";position:absolute;right:-11px;top:44px;width:22px;height:1px;
    background:linear-gradient(90deg,var(--line-strong),transparent);
  }
  .step-card:last-child::after{display:none}

  /* ============ 参数表 ============ */
  .table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-soft);box-shadow:var(--shadow)}
  .table-scroll{width:100%;overflow-x:auto}
  table.spec{width:100%;min-width:560px;border-collapse:collapse;font-size:15px}
  table.spec thead th{
    background:var(--panel-2);color:#EAF6FF;font-weight:650;font-size:14px;
    text-align:left;padding:15px 20px;border-bottom:1px solid var(--line);white-space:nowrap;
  }
  table.spec td{padding:15px 20px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:top}
  table.spec tbody tr:nth-child(odd) td{background:rgba(14,21,38,.62)}
  table.spec tbody tr:nth-child(even) td{background:rgba(10,16,32,.5)}
  table.spec tbody tr:hover td{background:var(--panel-2);color:var(--text)}
  table.spec tbody tr:last-child td{border-bottom:0}
  table.spec td:first-child{color:#DCE7F7;font-weight:600;white-space:nowrap}

  /* ============ FAQ ============ */
  .faq-list{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-soft);box-shadow:var(--shadow)}
  .faq-item + .faq-item{border-top:1px solid var(--line)}
  .faq-q{
    width:100%;position:relative;display:flex;align-items:center;justify-content:space-between;gap:18px;
    padding:20px 22px;background:transparent;border:0;text-align:left;cursor:pointer;
    font-size:16.5px;font-weight:600;color:#DCE7F7;
    transition:background .22s var(--ease),color .22s var(--ease);
  }
  .faq-q::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
    background:linear-gradient(180deg,var(--cyan),var(--violet));
    opacity:0;transition:opacity .22s var(--ease);
  }
  .faq-q:hover{background:var(--panel-2)}
  .faq-item.is-open .faq-q{color:#EAF6FF;background:var(--panel-2)}
  .faq-item.is-open .faq-q::before{opacity:1}
  .faq-plus{
    flex:0 0 auto;width:26px;height:26px;position:relative;border-radius:8px;
    border:1px solid var(--line);display:grid;place-items:center;
    transition:transform .26s var(--ease),border-color .26s var(--ease);
  }
  .faq-plus::before,.faq-plus::after{
    content:"";position:absolute;background:var(--cyan);border-radius:2px;
  }
  .faq-plus::before{width:12px;height:2px}
  .faq-plus::after{width:2px;height:12px;transition:opacity .26s var(--ease)}
  .faq-item.is-open .faq-plus{transform:rotate(180deg);border-color:var(--line-strong)}
  .faq-item.is-open .faq-plus::after{opacity:0}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);background:rgba(19,28,49,.55)}
  .faq-a-inner{padding:4px 64px 22px 22px;font-size:15.5px;color:var(--text-2);line-height:1.9}

  /* ============ CTA ============ */
  .cta-panel{
    position:relative;overflow:hidden;
    border:1px solid var(--line);border-radius:var(--radius-lg);
    background:linear-gradient(135deg,#0E1526 0%,#0A1020 55%,#0E1526 100%);
    padding:46px;box-shadow:var(--shadow);
    display:grid;grid-template-columns:1.15fr .85fr;gap:38px;align-items:center;
  }
  .cta-panel::before{
    content:"";position:absolute;right:-160px;top:-200px;width:540px;height:540px;pointer-events:none;
    background:radial-gradient(circle,rgba(56,225,255,.16),transparent 66%);
  }
  .cta-panel::after{
    content:"";position:absolute;left:-40px;bottom:-120px;width:460px;height:280px;pointer-events:none;
    background:linear-gradient(115deg,transparent 42%,rgba(124,92,255,.16) 50%,transparent 58%);
    transform:rotate(-4deg);
  }
  .cta-panel > *{position:relative;z-index:2}
  .cta-panel h2{font-size:clamp(22px,2.8vw,30px);font-weight:750;color:#EAF6FF;line-height:1.32}
  .cta-panel p{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:520px}
  .cta-meta{margin-top:22px;display:grid;gap:10px}
  .cta-meta li{display:flex;align-items:center;gap:10px;font-size:14.5px;color:var(--text-2)}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--amber);box-shadow:0 0 10px rgba(255,122,41,.7);flex:0 0 auto}
  .cta-box{
    border:1px solid var(--line);border-radius:var(--radius);
    background:rgba(10,16,32,.66);padding:26px;
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .cta-box h3{font-size:17px;font-weight:650;color:#EAF6FF}
  .cta-box p{margin-top:10px;font-size:14.5px;color:var(--text-2)}
  .cta-box .btn{margin-top:20px}

  /* ============ 页脚 ============ */
  .site-footer{
    position:relative;z-index:1;margin-top:80px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg,#05070E,#080D18);
    padding:56px 0 28px;
  }
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-brand .brand-mark{width:34px;height:34px;font-size:13px;border-radius:9px}
  .footer-col p{font-size:14px;color:var(--text-2);line-height:1.85}
  .footer-col h4{font-size:14px;font-weight:650;color:#EAF6FF;margin-bottom:16px;letter-spacing:.02em}
  .footer-links{display:grid;gap:11px}
  .footer-links a{font-size:14px;color:var(--text-2);transition:color .2s var(--ease),transform .2s var(--ease)}
  .footer-links a:hover{color:var(--cyan);transform:translateX(3px)}
  .footer-domain{
    display:inline-block;margin-top:14px;font-family:var(--font-num);
    font-size:13px;color:var(--text-3);letter-spacing:.06em;
  }
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
    font-size:13px;color:var(--text-3);
  }
  .footer-bottom a{color:var(--text-2)}
  .footer-bottom a:hover{color:var(--cyan)}

  /* ============ 返回顶部 ============ */
  .to-top{
    position:fixed;right:24px;bottom:28px;z-index:80;
    width:46px;height:46px;border-radius:50%;
    border:1px solid var(--line-strong);background:rgba(10,16,32,.9);
    color:var(--cyan);cursor:pointer;display:grid;place-items:center;
    opacity:0;visibility:hidden;
    transition:opacity .22s var(--ease),visibility .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  }
  .to-top.is-visible{opacity:1;visibility:visible}
  .to-top:hover{transform:translateY(-3px);box-shadow:0 0 22px rgba(56,225,255,.35)}

  /* ============ 响应式 ============ */
  @media (max-width:1279px){
    .container{max-width:100%}
  }
  @media (max-width:1023px){
    .nav-main{display:none}
    .header-actions .btn{display:none}
    .nav-toggle{display:grid}
    .header-inner{height:68px;justify-content:space-between}
    .section{padding:56px 0}
    .section-sm{padding:44px 0}
    .card-grid{gap:20px}
    .step-track{grid-template-columns:repeat(2,minmax(0,1fr))}
    .step-card::after{display:none}
    .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding:24px}
    .stat-item:nth-child(3){border-left:0;padding-left:0}
    .cta-panel{grid-template-columns:1fr;gap:28px;padding:36px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
    .page-hero{padding:44px 0 38px}
  }
  @media (max-width:767px){
    body{font-size:15.5px}
    .section{padding:44px 0}
    .section-sm{padding:36px 0}
    .card-grid{grid-template-columns:1fr}
    .step-track{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr}
    .footer-bottom{flex-direction:column;gap:8px}
    .hero-lead{font-size:15.5px}
    .faq-a-inner{padding:2px 22px 20px}
    .cta-panel{padding:28px 22px}
    .site-footer{margin-top:56px;padding:44px 0 24px}
  }
  @media (max-width:520px){
    .container{padding:0 16px}
    .brand-text{font-size:16px;gap:8px}
    .brand-sub{display:none}
    .hero-actions{flex-direction:column}
    .hero-actions .btn{width:100%}
    .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr));padding:20px 18px}
    .stat-item{padding-left:14px}
    .stat-item:nth-child(odd){border-left:0;padding-left:0}
    .to-top{right:16px;bottom:18px}
    .tag-bar{padding:14px 0;gap:8px}
    .tag-chip{padding:7px 13px;font-size:13px}
  }