/* ============================================================
   CPU-Z 中文版 · 深色科技风共享样式
   零外部依赖 · 玻璃拟态 · 滚动渐显 · 完全响应式
   ============================================================ */
:root{
  --bg:#05080f;
  --bg-soft:#0a101c;
  --card:rgba(15,23,42,.55);
  --card-solid:#0c1524;
  --border:rgba(148,163,184,.14);
  --border-hi:rgba(56,189,248,.35);
  --text:#e2e8f0;
  --text-dim:#8fa3bd;
  --accent:#22d3ee;
  --accent-2:#38bdf8;
  --glow:rgba(34,211,238,.18);
  --glow-hi:rgba(34,211,238,.35);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  --mono:"Cascadia Code",Consolas,"JetBrains Mono",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
  min-height:100vh;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color .25s}
a:hover{color:#7deefd}
ul,ol{list-style:none}
h1,h2,h3,h4{line-height:1.35;font-weight:700;letter-spacing:.5px}
::selection{background:rgba(34,211,238,.3)}

/* ---------- 通用布局 ---------- */
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:76px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:3px;color:var(--accent);
  text-transform:uppercase;margin-bottom:14px;
}
.section-tag::before,.section-tag::after{
  content:"";width:26px;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent));
}
.section-tag::after{background:linear-gradient(90deg,var(--accent),transparent)}
.section-title{font-size:clamp(24px,3.4vw,34px);margin-bottom:14px}
.section-title em{font-style:normal;color:var(--accent)}
.section-desc{color:var(--text-dim);font-size:15.5px}
.grid-2,.grid-3,.grid-4{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.center{text-align:center}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 30px;border-radius:12px;font-size:15.5px;font-weight:600;
  font-family:var(--font);cursor:pointer;border:1px solid transparent;
  transition:transform .25s,box-shadow .25s,border-color .25s,background .25s;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent-2),var(--accent));
  color:#03121a;box-shadow:0 8px 28px rgba(34,211,238,.28);
}
.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 14px 40px rgba(34,211,238,.45);
  color:#03121a;
}
.btn-ghost{
  background:rgba(34,211,238,.06);border-color:var(--border-hi);color:var(--text);
}
.btn-ghost:hover{
  border-color:var(--accent);background:rgba(34,211,238,.12);
  transform:translateY(-3px);color:var(--accent);
}
.btn-lg{padding:18px 44px;font-size:17px;border-radius:14px}
.btn .ico{width:18px;height:18px;flex:none}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(5,8,15,.72);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
  transition:background .3s;
}
.site-header.scrolled{background:rgba(5,8,15,.92)}
.header-inner{
  max-width:1180px;margin:0 auto;padding:0 24px;
  height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--text)}
.logo:hover{color:var(--text)}
.logo .chip{width:30px;height:30px;flex:none}
.logo b{color:var(--accent)}
.logo small{font-size:11px;font-weight:500;color:var(--text-dim);display:block;line-height:1;margin-top:2px}
.nav-list{display:flex;align-items:center;gap:6px}
.nav-link{
  padding:8px 14px;border-radius:9px;font-size:14.5px;color:var(--text-dim);
  transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--text);background:rgba(34,211,238,.08)}
.nav-link.active{color:var(--accent);background:rgba(34,211,238,.12)}
.header-cta{padding:9px 20px;font-size:14px}
.burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:10px;border:1px solid var(--border);
  border-radius:10px;background:transparent;cursor:pointer;
}
.burger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-nav{
  display:none;flex-direction:column;padding:10px 24px 20px;
  border-top:1px solid var(--border);background:rgba(5,8,15,.97);
}
.mobile-nav .nav-link{padding:12px 10px;border-bottom:1px dashed rgba(148,163,184,.08)}
.mobile-nav.show{display:flex}

/* ---------- Hero ---------- */
.hero{
  position:relative;padding:110px 0 90px;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(620px 340px at 18% -8%,rgba(56,189,248,.16),transparent 65%),
    radial-gradient(620px 340px at 82% -8%,rgba(34,211,238,.13),transparent 65%),
    radial-gradient(800px 500px at 50% 118%,rgba(37,99,235,.12),transparent 70%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 70% 62% at 50% 38%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 70% 62% at 50% 38%,#000 30%,transparent 75%);
}
.hero-inner{position:relative;z-index:1;text-align:center;max-width:860px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 18px;border-radius:100px;font-size:13.5px;
  color:var(--accent);border:1px solid var(--border-hi);
  background:rgba(34,211,238,.07);margin-bottom:26px;
}
.hero-badge .dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 10px var(--accent);animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{
  font-size:clamp(32px,5.6vw,54px);line-height:1.28;margin-bottom:22px;letter-spacing:1px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--accent-2) 10%,var(--accent) 55%,#7dd3fc 90%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-sub{color:var(--text-dim);font-size:clamp(15px,1.8vw,17.5px);max-width:640px;margin:0 auto 36px}
.hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-bottom:44px}
.hero-stats{
  display:flex;justify-content:center;gap:0;flex-wrap:wrap;
  border:1px solid var(--border);border-radius:var(--radius);
  background:var(--card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  max-width:720px;margin:0 auto;overflow:hidden;
}
.hero-stats .stat{
  flex:1;min-width:160px;padding:18px 12px;text-align:center;position:relative;
}
.hero-stats .stat + .stat::before{
  content:"";position:absolute;left:0;top:22%;height:56%;width:1px;
  background:linear-gradient(180deg,transparent,var(--border),transparent);
}
.stat b{display:block;font-size:21px;color:var(--accent);font-family:var(--mono);letter-spacing:1px}
.stat span{font-size:12.5px;color:var(--text-dim)}

/* ---------- 玻璃卡片 ---------- */
.glass{
  background:var(--card);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--border);border-radius:var(--radius);
  transition:transform .3s,box-shadow .3s,border-color .3s;
}
.card{padding:28px 24px;position:relative;overflow:hidden}
.card::before{
  content:"";position:absolute;top:0;left:24%;right:24%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.5),transparent);
  opacity:0;transition:opacity .3s;
}
.card:hover{
  transform:translateY(-6px);
  border-color:var(--border-hi);
  box-shadow:0 20px 46px rgba(0,0,0,.5),0 0 34px var(--glow);
}
.card:hover::before{opacity:1}
.card-icon{
  width:52px;height:52px;border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(56,189,248,.18),rgba(34,211,238,.1));
  border:1px solid var(--border-hi);margin-bottom:18px;
}
.card-icon svg{width:26px;height:26px;stroke:var(--accent);fill:none;stroke-width:1.7}
.card h3{font-size:17.5px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--text-dim)}

/* ---------- 截图展示 ---------- */
.shot-wrap{position:relative;margin:0 auto;max-width:640px}
.shot-wrap::before{
  content:"";position:absolute;inset:-30px -38px;
  background:radial-gradient(closest-side,rgba(34,211,238,.16),transparent 72%);
  filter:blur(12px);z-index:0;
}
.shot-frame{
  position:relative;z-index:1;border-radius:18px;overflow:hidden;
  border:1px solid var(--border-hi);
  box-shadow:var(--shadow),0 0 60px var(--glow);
  background:var(--card-solid);
}
.shot-frame .bar{
  display:flex;align-items:center;gap:7px;
  padding:11px 16px;background:rgba(15,23,42,.85);
  border-bottom:1px solid var(--border);
}
.shot-frame .bar i{
  width:11px;height:11px;border-radius:50%;display:block;
}
.shot-frame .bar i:nth-child(1){background:#ff5f57}
.shot-frame .bar i:nth-child(2){background:#febc2e}
.shot-frame .bar i:nth-child(3){background:#28c840}
.shot-frame .bar span{margin-left:10px;font-size:12.5px;color:var(--text-dim);font-family:var(--mono)}
.shot-frame img{width:100%}
.shot-caption{
  margin-top:18px;text-align:center;font-size:13.5px;color:var(--text-dim);
}

/* ---------- 更新亮点 ---------- */
.update-box{padding:30px 28px}
.update-box h3{
  display:flex;align-items:center;gap:10px;font-size:18px;margin-bottom:6px;
}
.update-box .ver{
  font-family:var(--mono);font-size:13px;color:var(--accent);
  background:rgba(34,211,238,.1);border:1px solid var(--border-hi);
  padding:2px 10px;border-radius:100px;
}
.update-box .date{font-size:13px;color:var(--text-dim);margin-bottom:18px}
.update-list li{
  display:flex;gap:12px;padding:11px 0;font-size:15px;
  border-bottom:1px dashed rgba(148,163,184,.1);
}
.update-list li:last-child{border-bottom:none}
.update-list .tag{
  flex:none;font-size:12px;padding:3px 10px;border-radius:6px;height:fit-content;
  margin-top:3px;font-weight:600;letter-spacing:.5px;
}
.tag-new{color:#7ee787;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.3)}
.tag-up{color:var(--accent);background:rgba(34,211,238,.1);border:1px solid var(--border-hi)}
.update-list p{color:var(--text-dim);font-size:14px}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  position:relative;text-align:center;padding:64px 28px;border-radius:22px;overflow:hidden;
  background:
    radial-gradient(520px 260px at 50% -20%,rgba(34,211,238,.16),transparent 70%),
    linear-gradient(180deg,rgba(13,25,45,.7),rgba(8,14,26,.7));
  border:1px solid var(--border-hi);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.cta-band h2{font-size:clamp(23px,3vw,31px);margin-bottom:14px}
.cta-band p{color:var(--text-dim);margin-bottom:30px;max-width:560px;margin-left:auto;margin-right:auto}
.cta-band .btn + .btn{margin-left:14px}
.platform-note{
  margin-top:22px;font-size:13.5px;color:var(--text-dim);
}
.platform-note i{font-style:normal;color:var(--accent)}

/* ---------- 面包屑 ---------- */
.crumbs{
  padding:20px 0 0;font-size:13.5px;color:var(--text-dim);
}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumbs li + li::before{content:"›";margin-right:8px;color:var(--text-dim)}
.crumbs a{color:var(--text-dim)}
.crumbs a:hover{color:var(--accent)}
.crumbs [aria-current]{color:var(--accent)}

/* ---------- 页面标题区 ---------- */
.page-head{
  position:relative;padding:58px 0 10px;text-align:center;overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(480px 200px at 50% -30%,rgba(56,189,248,.15),transparent 70%);
  pointer-events:none;
}
.page-head h1{font-size:clamp(27px,3.8vw,38px);margin-bottom:14px;position:relative}
.page-head h1 em{
  font-style:normal;color:var(--accent);
}
.page-head .lead{
  position:relative;color:var(--text-dim);max-width:680px;margin:0 auto;font-size:15.5px;
}

/* ---------- 表格 ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);
  background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
table.tbl{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
.tbl th{
  background:rgba(34,211,238,.08);color:var(--accent);font-weight:600;
  padding:13px 16px;text-align:left;white-space:nowrap;letter-spacing:.5px;
}
.tbl td{padding:12px 16px;border-top:1px solid rgba(148,163,184,.09);color:var(--text-dim)}
.tbl td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.tbl tr:hover td{background:rgba(34,211,238,.04)}
.tbl .ok{color:#7ee787}
.tbl .no{color:#ff8b81}
.tbl code{font-family:var(--mono);font-size:13px;color:#8be9fd}

/* ---------- 代码块 ---------- */
.code-block{
  font-family:var(--mono);font-size:13.5px;line-height:1.9;
  background:#070d18;border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:18px 22px;overflow-x:auto;color:#a5d6ff;
  border-left:3px solid var(--accent);
}
.code-block .c{color:#5b7085}
.code-block .k{color:#7ee787}
.code-block .v{color:#ffd479}

/* ---------- 步骤 ---------- */
.steps{counter-reset:step;display:grid;gap:22px}
.steps-5{grid-template-columns:repeat(5,1fr)}
.step{padding:26px 20px;position:relative;text-align:center}
.step-num{
  counter-increment:step;width:46px;height:46px;margin:0 auto 16px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:19px;font-weight:700;color:#03121a;
  background:linear-gradient(135deg,var(--accent-2),var(--accent));
  box-shadow:0 0 22px var(--glow-hi);
}
.step-num::before{content:counter(step)}
.step h3{font-size:16px;margin-bottom:9px}
.step p{font-size:13.5px;color:var(--text-dim)}

/* ---------- 手风琴 ---------- */
.acc{display:grid;gap:14px;max-width:860px;margin:0 auto}
.acc-item{
  border:1px solid var(--border);border-radius:14px;overflow:hidden;
  background:var(--card);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:border-color .3s,box-shadow .3s;
}
.acc-item.open{border-color:var(--border-hi);box-shadow:0 12px 34px rgba(0,0,0,.4),0 0 26px var(--glow)}
.acc-head{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:17px 22px;background:none;border:none;cursor:pointer;
  font-family:var(--font);font-size:15.5px;font-weight:600;color:var(--text);
  text-align:left;transition:color .2s;
}
.acc-head:hover{color:var(--accent)}
.acc-head .q{
  flex:none;width:26px;height:26px;border-radius:8px;font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;color:var(--accent);
  background:rgba(34,211,238,.1);border:1px solid var(--border-hi);
}
.acc-head .arrow{
  margin-left:auto;flex:none;width:22px;height:22px;position:relative;transition:transform .35s;
}
.acc-head .arrow::before,.acc-head .arrow::after{
  content:"";position:absolute;background:var(--accent);border-radius:2px;
}
.acc-head .arrow::before{width:13px;height:2px;top:10px;left:4.5px}
.acc-head .arrow::after{width:2px;height:13px;left:10px;top:4.5px}
.acc-item.open .arrow{transform:rotate(90deg)}
.acc-item.open .arrow::after{transform:scaleY(0)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .4s ease}
.acc-body-in{padding:0 22px 20px 62px;color:var(--text-dim);font-size:14.5px}
.acc-body-in a{text-decoration:underline;text-underline-offset:3px}
.acc-body-in code{
  font-family:var(--mono);font-size:13px;color:#8be9fd;
  background:rgba(34,211,238,.08);padding:1px 7px;border-radius:5px;
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;max-width:760px;margin:0 auto;padding-left:30px}
.timeline::before{
  content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--accent),rgba(56,189,248,.25));
  box-shadow:0 0 12px var(--glow);
}
.tl-item{position:relative;padding:0 0 34px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:7px;width:16px;height:16px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);box-shadow:0 0 14px var(--glow-hi);
}
.tl-year{
  font-family:var(--mono);font-size:14px;color:var(--accent);font-weight:700;
  letter-spacing:1.5px;margin-bottom:6px;
}
.tl-item h3{font-size:17px;margin-bottom:8px}
.tl-item p{font-size:14.5px;color:var(--text-dim)}

/* ---------- 术语表 ---------- */
.term-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.term{padding:22px 20px}
.term h3{
  font-size:15.5px;margin-bottom:8px;color:var(--text);
  display:flex;align-items:center;gap:8px;
}
.term h3::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--accent);flex:none;box-shadow:0 0 8px var(--glow-hi)}
.term h3 small{font-family:var(--mono);font-size:12px;color:var(--text-dim);font-weight:400}
.term p{font-size:13.8px;color:var(--text-dim)}

/* ---------- 键盘按键 ---------- */
.kbd{
  display:inline-block;padding:3px 10px;border-radius:7px;font-family:var(--mono);
  font-size:13px;color:var(--accent);background:rgba(34,211,238,.08);
  border:1px solid var(--border-hi);border-bottom-width:2.5px;white-space:nowrap;
}

/* ---------- 用户群像 ---------- */
.user-card{padding:30px 24px;text-align:center}
.user-card .avatar{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(56,189,248,.2),rgba(34,211,238,.08));
  border:1px solid var(--border-hi);
}
.user-card .avatar svg{width:30px;height:30px;stroke:var(--accent);fill:none;stroke-width:1.6}
.user-card h3{font-size:17px;margin-bottom:9px}
.user-card p{font-size:14px;color:var(--text-dim)}

/* ---------- 名人堂 ---------- */
.hof-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.hof{padding:26px 22px;text-align:center}
.hof .rank{
  font-family:var(--mono);font-size:30px;font-weight:800;
  background:linear-gradient(120deg,var(--accent-2),var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  margin-bottom:6px;
}
.hof h3{font-size:15.5px;margin-bottom:8px}
.hof p{font-size:13.5px;color:var(--text-dim)}

/* ---------- 诊断流程 ---------- */
.flow{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center}
.flow-node{
  flex:1;min-width:190px;max-width:230px;padding:22px 16px;text-align:center;
  border:1px solid var(--border);border-radius:14px;background:var(--card);
  backdrop-filter:blur(10px);position:relative;transition:transform .3s,box-shadow .3s;
}
.flow-node:hover{transform:translateY(-5px);box-shadow:0 16px 36px rgba(0,0,0,.45),0 0 24px var(--glow)}
.flow-node h3{font-size:15px;margin-bottom:8px;color:var(--accent)}
.flow-node p{font-size:13px;color:var(--text-dim)}
.flow-arrow{
  display:flex;align-items:center;justify-content:center;width:46px;
  color:var(--accent);font-size:22px;flex:none;
}

/* ---------- 404 ---------- */
.err-hero{padding:120px 0 80px;text-align:center;position:relative;overflow:hidden}
.err-hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(500px 260px at 50% 0%,rgba(34,211,238,.13),transparent 70%);
}
.err-code{
  position:relative;font-family:var(--mono);font-size:clamp(90px,17vw,150px);font-weight:800;
  line-height:1;letter-spacing:8px;
  background:linear-gradient(120deg,var(--accent-2),var(--accent) 60%,#0ea5e9);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 26px rgba(34,211,238,.35));
  margin-bottom:18px;
}
.err-hero h1{position:relative;font-size:24px;margin-bottom:12px}
.err-hero p{position:relative;color:var(--text-dim);margin-bottom:32px}
.err-hero .btn{position:relative}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--border);
  background:linear-gradient(180deg,rgba(8,13,25,.6),rgba(5,8,15,.95));
  padding:56px 0 26px;margin-top:40px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:38px;margin-bottom:38px;
}
.footer-brand p{color:var(--text-dim);font-size:13.8px;margin-top:14px;max-width:340px}
.footer-col h3{
  font-size:15px;margin-bottom:16px;color:var(--text);
  display:inline-block;position:relative;padding-bottom:8px;
}
.footer-col h3::after{
  content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent-2),var(--accent));
}
.footer-col li{margin-bottom:9px}
.footer-col a{color:var(--text-dim);font-size:14px;transition:color .2s,padding-left .2s}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.friend-links{
  border-top:1px dashed rgba(148,163,184,.14);padding-top:26px;margin-bottom:26px;
}
.friend-links h3{
  font-size:14px;color:var(--text-dim);margin-bottom:14px;letter-spacing:1px;
}
.friend-links ul{display:flex;flex-wrap:wrap;gap:12px 28px}
.friend-links a{color:var(--text-dim);font-size:13.8px}
.friend-links a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:22px;
  display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-dim);
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:26px;bottom:30px;z-index:90;
  width:46px;height:46px;border-radius:12px;cursor:pointer;
  border:1px solid var(--border-hi);background:rgba(10,18,32,.8);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s,transform .3s,box-shadow .3s;
}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{box-shadow:0 0 24px var(--glow-hi)}
.back-top svg{width:20px;height:20px;stroke:var(--accent);fill:none;stroke-width:2}

/* ---------- 滚动渐显 ---------- */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}.d4{transition-delay:.4s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 内页小节标题 ---------- */
.sub-head{display:flex;align-items:baseline;gap:14px;margin:52px 0 24px}
.sub-head h2{font-size:clamp(20px,2.6vw,26px);flex:none}
.sub-head .line{flex:1;height:1px;background:linear-gradient(90deg,var(--border-hi),transparent)}
.note{
  display:flex;gap:12px;padding:16px 20px;border-radius:12px;font-size:14px;
  color:var(--text-dim);background:rgba(34,211,238,.05);border:1px solid rgba(34,211,238,.18);
  margin-top:22px;
}
.note b{color:var(--accent)}
.note svg{width:18px;height:18px;flex:none;stroke:var(--accent);fill:none;stroke-width:2;margin-top:4px}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .nav-list,.header-cta{display:none}
  .burger{display:flex}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .steps-5{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(5){grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:span 2}
  .flow-arrow{width:34px}
  .section{padding:60px 0}
}
@media (max-width:640px){
  .container{padding:0 18px}
  .hero{padding:80px 0 60px}
  .hero-actions .btn{width:100%;max-width:340px}
  .cta-band .btn{width:100%;max-width:340px}
  .cta-band .btn + .btn{margin-left:0;margin-top:14px}
  .grid-2,.grid-3,.grid-4,.steps-5{grid-template-columns:1fr}
  .step:nth-child(5){grid-column:auto}
  .hero-stats{flex-direction:column}
  .hero-stats .stat + .stat::before{
    left:22%;right:22%;top:0;width:auto;height:1px;
    background:linear-gradient(90deg,transparent,var(--border),transparent);
  }
  .acc-body-in{padding-left:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .flow{flex-direction:column;align-items:center}
  .flow-node{max-width:100%;width:100%}
  .flow-arrow{transform:rotate(90deg);width:40px;height:34px}
  .shot-wrap::before{inset:-16px}
}