/* ==========================================================================
   启函AI 官网 · 全站样式表  (assets/site.css)
   一处改，全站生效。修改后重新运行 site_build.py 即可。
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#0d1424; --ink2:#151d33; --ink3:#1e2942;
  --brand:#ff6b35; --brand-d:#e2541f; --brand-l:#fff2eb;
  --text:#1f2937; --muted:#6b7280; --muted2:#9aa4b2;
  --line:#e6eaf0; --bg:#f7f9fc; --white:#fff;
  --ok:#16a34a; --okbg:#eefaf1;
  --r:12px; --r-lg:18px;
  --sh:0 2px 10px rgba(13,20,36,.06);
  --sh-lg:0 16px 44px rgba(13,20,36,.13);
  --max:1120px;
}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--white);line-height:1.75;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-d)}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--ink);font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.4em}
li{margin:.3em 0}
code{background:#f1f4f8;border:1px solid var(--line);border-radius:4px;padding:1px 6px;font-size:.92em;font-family:Consolas,Monaco,monospace}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;width:100%}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--ink);color:#fff;padding:8px 14px;border-radius:6px;z-index:9999}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:8px;
  padding:12px 24px;font-size:15px;font-weight:700;border:1px solid transparent;cursor:pointer;
  transition:all .2s;line-height:1.2;text-align:center}
.btn-primary{background:var(--brand);color:#fff!important}
.btn-primary:hover{background:var(--brand-d);transform:translateY(-1px);box-shadow:0 6px 18px rgba(255,107,53,.32)}
.btn-outline{border-color:rgba(255,255,255,.42);color:#fff!important}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.btn-ghost{border-color:var(--line);color:var(--ink)!important;background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)!important}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-lg{padding:15px 34px;font-size:17px}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:66px;display:flex;align-items:center;
  transition:background .3s,box-shadow .3s;background:rgba(13,20,36,.86);backdrop-filter:blur(12px)}
.nav.solid{background:rgba(13,20,36,.97);box-shadow:0 2px 16px rgba(0,0,0,.24)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{color:#fff;font-size:21px;font-weight:800;letter-spacing:.5px;display:flex;align-items:baseline;gap:8px}
.logo b{color:var(--brand)}
.logo-sub{font-size:12px;font-weight:400;color:rgba(255,255,255,.5);letter-spacing:2px}
.logo-light{color:#fff}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-item>a{display:flex;align-items:center;gap:5px;padding:9px 14px;border-radius:8px;font-size:15px;
  color:rgba(255,255,255,.82)!important;font-weight:400;transition:all .18s}
.nav-item>a:hover{color:#fff!important;background:rgba(255,255,255,.09)}
.nav-item>a.active{color:#fff!important}
.nav-item>a.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand);border-radius:2px}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.7;transition:transform .2s}
.has-sub:hover .caret{transform:rotate(180deg)}
.sub{position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(6px);
  min-width:286px;background:#fff;border-radius:14px;box-shadow:var(--sh-lg);padding:8px;
  opacity:0;visibility:hidden;transition:all .2s;z-index:1001}
.has-sub:hover .sub{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.sub a{display:block;padding:11px 14px;border-radius:9px;transition:background .16s}
.sub a b{display:block;font-size:14.5px;color:var(--ink);font-weight:700}
.sub a span{display:block;font-size:12.5px;color:var(--muted2);margin-top:1px}
.sub a:hover{background:var(--brand-l)}
.sub a:hover b{color:var(--brand)}
.burger{display:none;background:none;border:0;color:#fff;font-size:24px;cursor:pointer;padding:4px 8px}

/* ---------- Hero ---------- */
.hero{position:relative;background:
   radial-gradient(1000px 520px at 78% -8%,rgba(255,107,53,.22),transparent 62%),
   linear-gradient(150deg,#0d1424 0%,#151d33 52%,#101a2e 100%);
  color:#fff;padding:132px 0 84px;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.026) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.026) 1px,transparent 1px);
  background-size:56px 56px;pointer-events:none}
.hero-in{position:relative;z-index:2;text-align:center;max-width:900px;margin:0 auto}
.tagline{display:inline-block;font-size:13px;letter-spacing:1px;color:#ffc9ae;
  background:rgba(255,107,53,.14);border:1px solid rgba(255,107,53,.34);
  padding:5px 16px;border-radius:30px;margin:0 0 22px}
.hero h1{font-size:50px;color:#fff;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero p.lead{font-size:18px;color:rgba(255,255,255,.76);line-height:1.9;margin:0 auto 32px;max-width:760px}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.hero-note{font-size:13.5px;color:rgba(255,255,255,.5);margin:0}
.hero-shot{margin:52px auto 0;max-width:940px;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:0 30px 80px rgba(0,0,0,.5);border:1px solid rgba(255,255,255,.13);cursor:zoom-in;background:#0b1120}
.hero-shot img{width:100%}
.shot-cap{font-size:13px;color:rgba(255,255,255,.55);padding:12px 18px;background:rgba(0,0,0,.35);text-align:center}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section-alt{background:var(--bg)}
.section-dark{background:var(--ink);color:rgba(255,255,255,.82)}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .subtitle{color:rgba(255,255,255,.62)}
.sec-head{max-width:760px;margin:0 auto 46px;text-align:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--brand);margin-bottom:12px}
.sec-head h2{font-size:34px;margin-bottom:14px}
.subtitle{font-size:16.5px;color:var(--muted);margin:0}
.sec-head.left{text-align:left;margin-left:0}

/* ---------- 卡片与网格 ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh);transition:transform .22s,box-shadow .22s}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-lg)}
.card h3{font-size:18px;margin-bottom:10px}
.card p{font-size:14.8px;color:var(--muted);margin:0}
.card-ico{width:44px;height:44px;border-radius:11px;background:var(--brand-l);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:21px;margin-bottom:14px}
.card ul{font-size:14.6px;color:var(--muted);margin:10px 0 0}

/* 数据条 */
.statbar{background:var(--ink2);color:#fff;padding:34px 0}
.statbar-in{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.statbar .n{font-size:32px;font-weight:800;color:var(--brand);line-height:1.2}
.statbar .l{font-size:13.5px;color:rgba(255,255,255,.66);margin-top:2px}

/* ---------- 产品卡 ---------- */
.pgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));gap:24px}
.pcard{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--sh);transition:transform .24s,box-shadow .24s;color:inherit}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);color:inherit}
.pcard-flag{display:inline-block;font-size:12.5px;font-weight:700;padding:4px 13px;border-radius:20px;margin-bottom:15px}
.flag-on{background:var(--brand-l);color:var(--brand)}
.flag-soon{background:#eef1f6;color:var(--muted2)}
.pcard h3{font-size:22px;margin-bottom:6px}
.pcard h3 em{font-style:normal;font-size:14px;font-weight:400;color:var(--muted2);margin-left:6px}
.pcard .pdesc{font-size:15px;color:var(--muted);line-height:1.85;margin:12px 0 14px}
.pcard ul{font-size:14.6px;color:var(--muted);margin:0 0 18px}
.pcard .more{color:var(--brand);font-weight:700;font-size:15px}
.pcard.soon{background:#fbfcfe}
.pcard.soon:hover{transform:none;box-shadow:var(--sh)}
.pcard.soon .more{color:var(--muted2)}

/* ---------- 页面头 ---------- */
.phead{background:linear-gradient(150deg,#0d1424,#16203a);color:#fff;padding:118px 0 56px;position:relative;overflow:hidden}
.phead::after{content:"";position:absolute;inset:0;
  background:radial-gradient(760px 340px at 82% 0%,rgba(255,107,53,.2),transparent 60%);pointer-events:none}
.phead-in{position:relative;z-index:2}
.phead h1{color:#fff;font-size:38px;margin-bottom:14px}
.phead p{color:rgba(255,255,255,.72);font-size:17px;max-width:720px;margin:0}
.crumb{font-size:13.5px;color:rgba(255,255,255,.5);margin-bottom:16px}
.crumb a{color:rgba(255,255,255,.72);font-weight:400}
.crumb a:hover{color:var(--brand)}

/* ---------- 定价 ---------- */
.pricebox{max-width:560px;margin:0 auto;background:#fff;border:2px solid var(--brand);
  border-radius:22px;padding:40px 36px;text-align:center;box-shadow:0 18px 50px rgba(255,107,53,.16);position:relative}
.pricebox .badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--brand);color:#fff;font-size:13px;font-weight:700;padding:5px 18px;border-radius:20px;white-space:nowrap}
.pricebox h3{font-size:22px;margin-bottom:18px}
.pricebox .price{font-size:56px;font-weight:800;color:var(--ink);line-height:1}
.pricebox .price span{font-size:17px;font-weight:400;color:var(--muted2);margin-left:6px}
.pricebox .plabel{font-size:15px;color:var(--brand);font-weight:700;margin:12px 0 6px}
.pricebox .pdesc{font-size:14.6px;color:var(--muted);margin-bottom:24px}
.pricebox .pdesc b{color:var(--text)}
.plist{text-align:left;margin:22px 0 0;padding:22px 0 0;border-top:1px dashed var(--line);list-style:none;padding-left:0}
.plist li{font-size:14.8px;color:var(--muted);padding-left:26px;position:relative;margin:.55em 0}
.plist li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.pnote{max-width:760px;margin:30px auto 0;font-size:14.6px;color:var(--muted);
  background:var(--bg);border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:10px;padding:18px 22px;line-height:1.95}
.pnote b{color:var(--text)}
.cmp{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.6px;background:#fff;
  border:1px solid var(--line);border-radius:12px;overflow:hidden}
.cmp th,.cmp td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line)}
.cmp th{background:var(--bg);font-weight:700;color:var(--ink);font-size:14px}
.cmp tr:last-child td{border-bottom:0}
.cmp td.y{color:var(--ok);font-weight:700}
.cmp td.n{color:var(--muted2)}

/* ---------- 铁律 ---------- */
.rules{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rule{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
  border-radius:12px;padding:18px 20px}
.rule b{display:block;color:#fff;font-size:15px;margin-bottom:6px}
.rule span{font-size:13.8px;color:rgba(255,255,255,.66);line-height:1.8}

/* ---------- 截图 ---------- */
.shots{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.shot{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh);cursor:zoom-in}
.shot img{width:100%}
.shot .cap{padding:13px 18px;font-size:14px;color:var(--muted);border-top:1px solid var(--line)}
.shot.wide{grid-column:span 2}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff;overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 22px;
  font-size:16px;font-weight:700;color:var(--ink);cursor:pointer;user-select:none}
.faq-q:hover{color:var(--brand)}
.faq-q .arrow{font-size:12px;color:var(--muted2);transition:transform .25s;flex:none}
.faq-item.open .faq-q .arrow{transform:rotate(180deg)}
.faq-a{display:none;padding:0 22px 18px;font-size:15px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);padding-top:16px}
.faq-item.open .faq-a{display:block}

/* ---------- 文档布局 ---------- */
.docwrap{display:grid;grid-template-columns:236px 1fr;gap:44px;align-items:start}
.docside{position:sticky;top:86px;border-right:1px solid var(--line);padding-right:20px}
.docside h4{font-size:12.5px;letter-spacing:1.6px;color:var(--muted2);margin:0 0 10px;text-transform:uppercase}
.docside a{display:block;padding:8px 12px;border-radius:8px;font-size:14.6px;color:var(--text);font-weight:400;margin-bottom:2px}
.docside a:hover{background:var(--bg);color:var(--brand)}
.docside a.on{background:var(--brand-l);color:var(--brand);font-weight:700}
.docside .grp{margin-bottom:22px}
.prose{max-width:none;font-size:16px}
.prose h2{font-size:25px;margin:44px 0 14px;padding-left:12px;border-left:4px solid var(--brand)}
.prose h3{font-size:18.5px;margin:26px 0 10px}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose ul,.prose ol{padding-left:1.5em}
.prose li{margin:.4em 0}
.prose img{border:1px solid var(--line);border-radius:12px;margin:18px 0}
.prose strong{color:var(--ink)}

/* ---------- 提示块 ---------- */
.note,.warnbox,.tipbox,.okbox{border-radius:10px;padding:15px 20px;margin:18px 0;font-size:15px;line-height:1.9}
.note{background:#eef4fd;border-left:4px solid #3b82f6}
.tipbox{background:var(--okbg);border-left:4px solid var(--ok)}
.warnbox{background:#fdeceb;border-left:4px solid #e11d48}
.okbox{background:var(--okbg);border-left:4px solid var(--ok)}
.note b,.tipbox b,.warnbox b{color:var(--ink)}

/* ---------- 步骤 ---------- */
.stepbox{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:12px;padding:22px 24px;margin:16px 0;box-shadow:var(--sh)}
.stepbox h3{margin:0 0 10px;font-size:18px;display:flex;align-items:center;gap:10px}
.snum{display:inline-flex;align-items:center;justify-content:center;width:27px;height:27px;flex:none;
  background:var(--brand);color:#fff;border-radius:50%;font-size:14px;font-weight:800}
.kt{background:var(--ink);color:#fff;border-radius:5px;padding:2px 9px;font-size:14px;font-family:Consolas,monospace}
.ui{background:#eef1f6;border:1px solid #d8dfe8;border-radius:5px;padding:2px 9px;font-size:14.6px;color:var(--ink);font-weight:700;white-space:nowrap}

/* ---------- 下载卡 ---------- */
.dlcard{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;
  box-shadow:var(--sh);max-width:720px;margin:0 auto;text-align:center}
.dlcard .vmeta{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;font-size:14px;
  color:var(--muted);margin:18px 0}
.dlcard .vmeta b{color:var(--ink);display:block;font-size:15px}
.hashbox{margin-top:18px;background:var(--bg);border:1px solid var(--line);border-radius:10px;
  padding:14px 18px;text-align:left;font-size:13px;color:var(--muted);word-break:break-all}
.hashbox b{color:var(--ink);display:block;margin-bottom:4px}

/* ---------- CTA 带 ---------- */
.ctaband{background:linear-gradient(120deg,var(--brand),#d35400);color:#fff;padding:56px 0;text-align:center}
.ctaband h2{color:#fff;font-size:30px;margin-bottom:12px}
.ctaband p{color:rgba(255,255,255,.9);font-size:16.5px;margin:0 0 26px}
.ctaband .btn-ghost{background:#fff;border-color:#fff;color:var(--brand)!important}
.ctaband .btn-ghost:hover{background:#fff5f0}
.ctaband .btn-outline{border-color:rgba(255,255,255,.7)}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink);color:rgba(255,255,255,.6);padding:56px 0 26px;font-size:14.5px}
.foot-in{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:34px;
  border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand p{margin:12px 0 0;line-height:1.9;font-size:14px}
.foot-col h4{color:#fff;font-size:14.5px;margin:0 0 12px}
.foot-col a{display:block;color:rgba(255,255,255,.6);font-weight:400;padding:4px 0;font-size:14px}
.foot-col a:hover{color:var(--brand)}
.foot-bot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:rgba(255,255,255,.42)}
.foot-bot p{margin:0}
.foot-bot a{color:rgba(255,255,255,.6);font-weight:400}

/* ---------- 灯箱 ---------- */
.lb{position:fixed;inset:0;background:rgba(6,10,20,.94);display:none;align-items:center;justify-content:center;z-index:2000;padding:30px;cursor:zoom-out}
.lb.on{display:flex}
.lb img{max-width:96vw;max-height:88vh;width:auto;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.lb-cap{position:absolute;bottom:24px;left:0;right:0;text-align:center;color:rgba(255,255,255,.8);font-size:14px;padding:0 24px}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .rules{grid-template-columns:repeat(2,1fr)}
  .docwrap{grid-template-columns:1fr;gap:24px}
  .docside{position:static;border-right:0;border-bottom:1px solid var(--line);padding:0 0 18px;display:flex;flex-wrap:wrap;gap:8px}
  .docside .grp{margin:0}
  .docside h4{display:none}
  .docside a{display:inline-block;padding:6px 12px;background:var(--bg)}
  .foot-in{grid-template-columns:1fr 1fr}
  .hero h1{font-size:38px}
  .phead h1{font-size:30px}
}
@media (max-width:768px){
  .burger{display:block}
  .logo-sub{display:none}
  .nav-menu{display:none;position:absolute;top:66px;left:0;right:0;background:var(--ink2);
    flex-direction:column;align-items:stretch;padding:14px 20px 22px;gap:2px;
    box-shadow:0 14px 30px rgba(0,0,0,.35);max-height:calc(100vh - 66px);overflow:auto}
  .nav-menu.open{display:flex}
  .nav-item>a{padding:13px 6px;font-size:16px}
  .nav-item>a.active::after{display:none}
  .sub{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;
    background:rgba(255,255,255,.05);margin:4px 0 8px;padding:6px;min-width:0}
  .sub a b{color:#fff}
  .sub a span{color:rgba(255,255,255,.5)}
  .sub a:hover{background:rgba(255,255,255,.08)}
  .nav-menu>.btn{margin-top:12px}
  .hero{padding:104px 0 60px}
  .hero h1{font-size:29px}
  .hero p.lead{font-size:16px}
  .section{padding:56px 0}
  .sec-head h2{font-size:25px}
  .sec-head{margin-bottom:32px}
  .g2,.g3,.g4,.rules,.shots{grid-template-columns:1fr}
  .shot.wide{grid-column:span 1}
  .statbar-in{grid-template-columns:1fr 1fr}
  .foot-in{grid-template-columns:1fr;gap:26px}
  .pricebox{padding:32px 22px}
  .pricebox .price{font-size:44px}
  .phead{padding:96px 0 42px}
  .phead h1{font-size:25px}
  .phead p{font-size:15.5px}
  .wrap{padding:0 18px}
  .cmp{font-size:13.6px}
  .cmp th,.cmp td{padding:9px 10px}
}