/* ==========================================================================
   元境空间 · 官方网站设计系统
   深空科技风：网格光晕背景 + 电光青蓝渐变 + 玻璃拟态卡片
   ========================================================================== */

/* ---------- 1. Reset & Tokens ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  /* 底色层 */
  --bg:#04060C;
  --bg-soft:#070B15;
  --panel:rgba(255,255,255,.028);
  --panel-solid:#0B1220;
  --panel-hi:rgba(255,255,255,.055);

  /* 描边 */
  --line:rgba(140,175,255,.11);
  --line-hi:rgba(140,175,255,.26);

  /* 品牌色 */
  --brand:#2F7BFF;
  --brand-2:#22D3EE;
  --brand-3:#7C5CFF;
  --gold:#FFC44D;

  /* 文字 */
  --txt:#E9F0FA;
  --txt-2:#93A3BD;
  --txt-3:#5E6C85;

  /* 尺寸 */
  --nav-h:68px;
  --r-s:10px;
  --r:16px;
  --r-l:22px;
  --maxw:1220px;

  --grad:linear-gradient(120deg,var(--brand) 0%,var(--brand-2) 100%);
  --grad-3:linear-gradient(120deg,var(--brand) 0%,var(--brand-3) 45%,var(--brand-2) 100%);
  --shadow:0 24px 60px -20px rgba(0,0,0,.75);
  --glow:0 0 0 1px rgba(47,123,255,.28),0 18px 48px -18px rgba(47,123,255,.5);
}

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

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
  background:var(--bg);
  color:var(--txt);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* 全站底噪（网格 + 光晕） */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 600px at 12% -5%,rgba(47,123,255,.16),transparent 62%),
    radial-gradient(760px 520px at 88% 8%,rgba(34,211,238,.12),transparent 60%),
    radial-gradient(700px 700px at 50% 108%,rgba(124,92,255,.12),transparent 62%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(140,175,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(140,175,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
}

main,header,footer,.nav{position:relative;z-index:1}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul{list-style:none}

::selection{background:rgba(47,123,255,.35);color:#fff}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#05070E}
::-webkit-scrollbar-thumb{background:#1B2740;border-radius:20px;border:2px solid #05070E}
::-webkit-scrollbar-thumb:hover{background:#2A3A5C}

/* ---------- 2. Layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:104px 0;position:relative}
.section.tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;
  color:var(--brand-2);margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--grad);border-radius:2px}

h1,h2,h3,h4{font-weight:800;line-height:1.2;letter-spacing:-.02em}
.h1{font-size:clamp(38px,6.2vw,68px);letter-spacing:-.035em}
.h2{font-size:clamp(28px,4.2vw,44px);margin-bottom:18px}
.h3{font-size:clamp(20px,2.4vw,26px);margin-bottom:12px}
.section-head p,.lead{font-size:clamp(15px,1.5vw,17.5px);color:var(--txt-2);line-height:1.8}

.grad-text{background:var(--grad-3);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.mono{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* ---------- 3. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 30px;border-radius:100px;border:1px solid transparent;
  font-size:15.5px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:transform .28s cubic-bezier(.2,.8,.2,1),box-shadow .28s,background .28s,border-color .28s;
}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 34px -12px rgba(47,123,255,.85)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 44px -14px rgba(47,123,255,.95)}
.btn-ghost{background:rgba(255,255,255,.045);border-color:var(--line-hi);color:var(--txt);backdrop-filter:blur(12px)}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(140,175,255,.45);transform:translateY(-2px)}
.btn-line{background:transparent;border-color:var(--line-hi);color:var(--txt-2);padding:11px 24px;font-size:14px}
.btn-line:hover{color:var(--txt);border-color:var(--brand-2)}
.btn-block{width:100%}

/* ---------- 4. Nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:900;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(4,6,12,.55);
  backdrop-filter:blur(20px) saturate(160%);
  border-bottom:1px solid transparent;
  transition:background .35s,border-color .35s,height .35s;
}
.nav.scrolled{background:rgba(4,6,12,.9);border-bottom-color:var(--line);height:62px}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px}

.logo{display:flex;align-items:center;gap:11px;flex:none}
.logo-mark{
  width:36px;height:36px;border-radius:11px;flex:none;
  background:var(--grad);position:relative;
  box-shadow:0 8px 22px -8px rgba(47,123,255,.9);
  display:grid;place-items:center;
}
.logo-mark svg{width:20px;height:20px}
.logo-text{display:flex;flex-direction:column;line-height:1.12}
.logo-text b{font-size:17.5px;font-weight:800;letter-spacing:.02em}
.logo-text span{font-size:9.5px;letter-spacing:.3em;color:var(--txt-3);text-transform:uppercase;font-weight:600}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;padding:9px 15px;border-radius:100px;
  font-size:14.5px;font-weight:600;color:var(--txt-2);
  transition:color .25s,background .25s;
}
.nav-links a:hover{color:var(--txt);background:rgba(255,255,255,.05)}
.nav-links a.active{color:var(--txt);background:rgba(47,123,255,.14)}

.nav-cta{display:flex;align-items:center;gap:12px;flex:none}
.nav-cta .btn{padding:11px 22px;font-size:14px}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;flex:none;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  cursor:pointer;position:relative;
}
.nav-toggle i{
  position:absolute;left:11px;width:20px;height:1.8px;background:var(--txt);
  border-radius:2px;transition:.3s;
}
.nav-toggle i:nth-child(1){top:15px}
.nav-toggle i:nth-child(2){top:20.5px}
.nav-toggle i:nth-child(3){top:26px}
.nav-toggle.open i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle.open i:nth-child(2){opacity:0}
.nav-toggle.open i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* 移动端下拉 */
.nav-mobile{
  position:fixed;top:var(--nav-h);left:0;right:0;z-index:880;
  background:rgba(6,9,17,.97);backdrop-filter:blur(22px);
  border-bottom:1px solid var(--line);
  padding:12px 24px 24px;display:none;flex-direction:column;gap:2px;
}
.nav-mobile.open{display:flex}
.nav-mobile a{padding:14px 6px;font-size:16px;font-weight:600;color:var(--txt-2);border-bottom:1px solid rgba(140,175,255,.07)}
.nav-mobile a:last-of-type{border-bottom:0}
.nav-mobile .btn{margin-top:16px}

/* ---------- 5. Hero ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:calc(var(--nav-h) + 72px) 0 90px;overflow:hidden;
}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.85}
.hero .wrap{position:relative;z-index:1}

.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 17px 7px 8px;border-radius:100px;
  background:rgba(47,123,255,.1);border:1px solid rgba(47,123,255,.3);
  font-size:13px;color:#BFD9FF;margin-bottom:30px;backdrop-filter:blur(10px);
}
.hero-badge .pill{
  padding:2px 10px;border-radius:100px;background:var(--grad);
  color:#fff;font-size:11px;font-weight:800;letter-spacing:.05em;
}
.hero-badge .live{width:7px;height:7px;border-radius:50%;background:var(--brand-2);animation:blink 2.2s infinite}
@keyframes blink{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(34,211,238,.6)}50%{opacity:.45;box-shadow:0 0 0 6px rgba(34,211,238,0)}}

.hero h1{max-width:min(100%,19em)}
.hero-sub{
  font-size:clamp(15.5px,1.7vw,19px);color:var(--txt-2);
  max-width:680px;margin:26px 0 40px;line-height:1.85;
}
.hero-sub strong{color:var(--txt);font-weight:700}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}

.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  margin-top:76px;padding-top:34px;border-top:1px solid var(--line);
}
.hero-stats .stat{padding-right:24px;border-right:1px solid var(--line)}
.hero-stats .stat:last-child{border-right:0}
.stat-num{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.03em;line-height:1.1}
.stat-num .u{font-size:.5em;font-weight:700;color:var(--txt-2);margin-left:3px}
.stat-label{font-size:13px;color:var(--txt-3);margin-top:7px;letter-spacing:.02em}

/* ---------- 6. Logo/Trust bar ---------- */
.trust{padding:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.012)}
.trust .wrap{display:flex;align-items:center;gap:34px;flex-wrap:wrap;justify-content:center}
.trust .lbl{font-size:13px;color:var(--txt-3);letter-spacing:.06em}
.trust .tags{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.trust .tags span{
  font-size:13px;font-weight:600;color:var(--txt-2);
  padding:6px 15px;border-radius:100px;border:1px solid var(--line);background:rgba(255,255,255,.02);
}

/* ---------- 7. Cards ---------- */
.grid{display:grid;gap:20px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.g-auto{grid-template-columns:repeat(auto-fit,minmax(310px,1fr))}

.card{
  position:relative;border-radius:var(--r-l);padding:32px 28px;
  background:var(--panel);border:1px solid var(--line);
  backdrop-filter:blur(14px);overflow:hidden;
  transition:transform .4s cubic-bezier(.2,.8,.2,1),border-color .4s,background .4s,box-shadow .4s;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(140,175,255,.5),transparent);
  opacity:0;transition:opacity .4s;
}
/* 鼠标跟随光晕 */
.card::after{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  left:var(--mx,50%);top:var(--my,0%);transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(47,123,255,.16),transparent 68%);
  opacity:0;transition:opacity .45s;pointer-events:none;
}
.card:hover{transform:translateY(-5px);border-color:var(--line-hi);background:var(--panel-hi);box-shadow:var(--shadow)}
.card:hover::before,.card:hover::after{opacity:1}

.card-ico{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;
  margin-bottom:20px;position:relative;
  background:rgba(47,123,255,.12);border:1px solid rgba(47,123,255,.24);
}
.card-ico svg{width:24px;height:24px;stroke:var(--brand-2);fill:none;stroke-width:1.7}
.card-ico.v2{background:rgba(34,211,238,.12);border-color:rgba(34,211,238,.26)}
.card-ico.v3{background:rgba(124,92,255,.12);border-color:rgba(124,92,255,.26)}
.card-ico.v3 svg{stroke:#A78BFA}
.card-ico.v4{background:rgba(255,196,77,.12);border-color:rgba(255,196,77,.26)}
.card-ico.v4 svg{stroke:var(--gold)}

.card h3{font-size:19.5px;margin-bottom:10px;font-weight:750}
.card p{font-size:14.5px;color:var(--txt-2);line-height:1.78}
.card .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}
.card .tags i{
  font-style:normal;font-size:11.5px;font-weight:600;color:#9FB6D9;
  padding:4px 11px;border-radius:100px;background:rgba(140,175,255,.08);border:1px solid var(--line);
}
.card .num{
  position:absolute;top:22px;right:26px;font-size:44px;font-weight:900;
  color:rgba(140,175,255,.13);letter-spacing:-.04em;line-height:1;
}

/* 产品大卡（带列表） */
.pcard{display:flex;flex-direction:column;min-height:100%}
.pcard .pico{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad);box-shadow:0 10px 26px -12px rgba(47,123,255,.9);
}
.pcard .pico svg{width:22px;height:22px;stroke:#fff;fill:none;stroke-width:1.8}
.pcard .feats{margin-top:auto;padding-top:18px;display:flex;flex-direction:column;gap:9px}
.pcard .feats li{font-size:13.5px;color:var(--txt-2);display:flex;gap:9px;align-items:flex-start}
.pcard .feats li::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--brand-2);
  margin-top:8px;flex:none;
}
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;padding:4px 11px;border-radius:100px;
  background:rgba(255,196,77,.12);border:1px solid rgba(255,196,77,.3);color:var(--gold);
  margin-bottom:14px;
}
.chip.blue{background:rgba(47,123,255,.12);border-color:rgba(47,123,255,.3);color:#8FB9FF}

/* ---------- 8. 能力底座（横向条） ---------- */
.stack{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden}
.stack .item{background:var(--bg-soft);padding:28px 24px;transition:background .35s}
.stack .item:hover{background:#0B1220}
.stack .item h4{font-size:15.5px;margin-bottom:8px;font-weight:750}
.stack .item p{font-size:13.5px;color:var(--txt-2);line-height:1.7}
.stack .item .k{font-size:11px;font-weight:800;letter-spacing:.18em;color:var(--brand-2);margin-bottom:12px;display:block}

/* ---------- 9. 场景 / 行业 ---------- */
.scene{
  display:flex;gap:18px;padding:26px;border-radius:var(--r);
  background:linear-gradient(135deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  border:1px solid var(--line);transition:transform .35s,border-color .35s;
}
.scene:hover{transform:translateX(5px);border-color:var(--line-hi)}
.scene .si{
  width:44px;height:44px;border-radius:12px;flex:none;display:grid;place-items:center;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.22);font-size:20px;
}
.scene h4{font-size:16.5px;margin-bottom:7px;font-weight:750}
.scene p{font-size:13.8px;color:var(--txt-2);line-height:1.7}

/* ---------- 10. 优势（编号列表） ---------- */
.adv{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:26px}
.adv .a{position:relative;padding-left:56px}
.adv .a .n{
  position:absolute;left:0;top:2px;width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;font-size:14px;font-weight:900;font-variant-numeric:tabular-nums;
  background:rgba(47,123,255,.1);border:1px solid rgba(47,123,255,.28);color:#8FB9FF;
}
.adv .a h4{font-size:17px;margin-bottom:9px;font-weight:750}
.adv .a p{font-size:14px;color:var(--txt-2);line-height:1.78}

/* ---------- 11. 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0;margin-top:16px}
.flow .f{position:relative;padding:0 22px 0 0}
.flow .f::after{
  content:"";position:absolute;top:19px;right:6px;width:calc(100% - 46px);height:1px;
  background:linear-gradient(90deg,var(--line-hi),transparent);
}
.flow .f:last-child::after{display:none}
.flow .f .dot{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--bg-soft);border:1px solid var(--line-hi);color:var(--brand-2);
  font-weight:800;font-size:14px;margin-bottom:18px;position:relative;z-index:1;
}
.flow .f h4{font-size:16px;margin-bottom:8px;font-weight:750}
.flow .f p{font-size:13.5px;color:var(--txt-2);line-height:1.72}

/* ---------- 12. CTA 区块 ---------- */
.cta-box{
  position:relative;border-radius:28px;padding:64px 48px;text-align:center;overflow:hidden;
  background:linear-gradient(135deg,rgba(47,123,255,.16),rgba(124,92,255,.1) 50%,rgba(34,211,238,.12));
  border:1px solid var(--line-hi);
}
.cta-box::before{
  content:"";position:absolute;inset:0;opacity:.35;
  background-image:radial-gradient(rgba(140,175,255,.35) 1px,transparent 1px);
  background-size:26px 26px;
  mask-image:radial-gradient(circle at 50% 50%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 50% 50%,#000,transparent 72%);
}
.cta-box > *{position:relative}
.cta-box h2{font-size:clamp(26px,3.8vw,40px);margin-bottom:16px}
.cta-box p{color:var(--txt-2);max-width:600px;margin:0 auto 34px;font-size:16px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 13. 页面头（子页） ---------- */
.pagehead{padding:calc(var(--nav-h) + 76px) 0 64px;position:relative;overflow:hidden}
.pagehead::before{
  content:"";position:absolute;top:-40%;left:50%;transform:translateX(-50%);
  width:1100px;height:620px;
  background:radial-gradient(closest-side,rgba(47,123,255,.16),transparent);
}
.pagehead .wrap{position:relative}
.pagehead h1{font-size:clamp(32px,5vw,54px);margin-bottom:18px}
.pagehead p{font-size:clamp(15px,1.6vw,18px);color:var(--txt-2);max-width:660px}
.crumb{display:flex;gap:9px;align-items:center;font-size:13px;color:var(--txt-3);margin-bottom:20px}
.crumb a:hover{color:var(--brand-2)}
.crumb i{font-style:normal;opacity:.5}

/* ---------- 14. 关于页 ---------- */
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.facts .f{background:var(--bg-soft);padding:24px}
.facts .f .k{font-size:12px;color:var(--txt-3);letter-spacing:.08em;margin-bottom:8px}
.facts .f .v{font-size:17px;font-weight:750}

.timeline{position:relative;padding-left:34px;margin-top:34px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:1.5px;background:linear-gradient(180deg,var(--brand),var(--brand-2),transparent)}
.timeline .t{position:relative;padding-bottom:32px}
.timeline .t::before{
  content:"";position:absolute;left:-31px;top:7px;width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--brand-2);box-shadow:0 0 0 4px rgba(34,211,238,.1);
}
.timeline .t .yr{font-size:12.5px;font-weight:800;color:var(--brand-2);letter-spacing:.1em;margin-bottom:7px}
.timeline .t h4{font-size:17px;margin-bottom:7px;font-weight:750}
.timeline .t p{font-size:14px;color:var(--txt-2);line-height:1.75}

.license{
  border-radius:var(--r);border:1px solid var(--line);background:var(--panel);
  padding:20px;display:flex;gap:24px;align-items:center;flex-wrap:wrap;
}
.license .ph{
  width:230px;flex:none;border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:#0A0F1B;
}
.license .ph img{width:100%}
.license .info{flex:1;min-width:260px}
.license .info h4{font-size:17px;margin-bottom:12px;font-weight:750}
.license dl{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;font-size:13.5px}
.license dt{color:var(--txt-3);white-space:nowrap}
.license dd{color:var(--txt-2)}

/* ---------- 15. 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:34px;align-items:start}
.info-card{
  border-radius:var(--r-l);border:1px solid var(--line);background:var(--panel);
  padding:34px 30px;backdrop-filter:blur(14px);
}
.info-card .row{display:flex;gap:16px;padding:19px 0;border-bottom:1px solid rgba(140,175,255,.08)}
.info-card .row:last-child{border-bottom:0}
.info-card .ic{
  width:40px;height:40px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:rgba(47,123,255,.1);border:1px solid rgba(47,123,255,.24);
}
.info-card .ic svg{width:18px;height:18px;stroke:var(--brand-2);fill:none;stroke-width:1.7}
.info-card .k{font-size:12.5px;color:var(--txt-3);letter-spacing:.06em;margin-bottom:5px}
.info-card .v{font-size:15px;font-weight:650;line-height:1.6}
.info-card .v small{display:block;font-size:13px;font-weight:400;color:var(--txt-2);margin-top:3px}

.form-card{border-radius:var(--r-l);border:1px solid var(--line-hi);background:rgba(11,18,32,.72);padding:36px 32px;backdrop-filter:blur(16px)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;font-weight:650;color:var(--txt-2);margin-bottom:8px}
.field label .req{color:var(--brand-2)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:var(--r-s);
  background:rgba(4,6,12,.6);border:1px solid var(--line);color:var(--txt);
  font-size:14.5px;transition:border-color .25s,box-shadow .25s,background .25s;
}
.field textarea{resize:vertical;min-height:110px;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--brand);background:rgba(4,6,12,.9);
  box-shadow:0 0 0 3px rgba(47,123,255,.16);
}
.field input::placeholder,.field textarea::placeholder{color:var(--txt-3)}
.field select{appearance:none;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='%2393A3BD' stroke-width='2.4'><path d='M6 9l6 6 6-6'/></svg>");background-repeat:no-repeat;background-position:right 16px center}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

.form-tip{font-size:12.5px;color:var(--txt-3);margin-top:14px;line-height:1.7}
.form-ok{
  display:none;text-align:center;padding:36px 20px;
}
.form-ok.show{display:block;animation:fadeUp .5s both}
.form-ok .tick{
  width:62px;height:62px;border-radius:50%;margin:0 auto 20px;display:grid;place-items:center;
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.4);
}
.form-ok .tick svg{width:28px;height:28px;stroke:var(--brand-2);fill:none;stroke-width:2.4}
.form-ok h3{font-size:22px;margin-bottom:10px}
.form-ok p{color:var(--txt-2);font-size:14.5px}

/* ---------- 16. FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq .q{border-bottom:1px solid var(--line)}
.faq .q > button{
  width:100%;background:0;border:0;cursor:pointer;text-align:left;
  padding:24px 46px 24px 0;position:relative;
  font-size:16.5px;font-weight:700;color:var(--txt);transition:color .25s;
}
.faq .q > button:hover{color:var(--brand-2)}
.faq .q > button::after{
  content:"";position:absolute;right:6px;top:50%;width:13px;height:13px;
  border-right:2px solid var(--txt-2);border-bottom:2px solid var(--txt-2);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s;
}
.faq .q.open > button::after{transform:translateY(-30%) rotate(-135deg);border-color:var(--brand-2)}
.faq .a{max-height:0;overflow:hidden;transition:max-height .42s cubic-bezier(.2,.8,.2,1)}
.faq .a p{padding:0 40px 26px 0;font-size:14.5px;color:var(--txt-2);line-height:1.85}
.faq .q.open .a{max-height:520px}

/* ---------- 17. CTA 条 + Footer ---------- */
.footer{border-top:1px solid var(--line);margin-top:20px;background:rgba(4,6,12,.6)}
.footer-main{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px}
.footer h5{font-size:14px;font-weight:800;margin-bottom:18px;letter-spacing:.04em}
.footer .fcol a,.footer .fcol p{display:block;font-size:13.8px;color:var(--txt-2);margin-bottom:11px;transition:color .25s}
.footer .fcol a:hover{color:var(--brand-2)}
.footer .brand-blurb{font-size:13.8px;color:var(--txt-2);line-height:1.85;margin:18px 0 0;max-width:330px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:12.8px;color:var(--txt-3);
}
.footer-bottom a:hover{color:var(--brand-2)}

/* ---------- 17.5 产品详情 / 通用模块 ---------- */
.split{display:grid;grid-template-columns:.92fr 1.08fr;gap:52px;align-items:start}
.checks{display:flex;flex-direction:column;gap:13px;margin-top:26px}
.checks li{display:flex;gap:13px;font-size:14.5px;color:var(--txt-2);line-height:1.72}
.checks li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-2);
  margin-top:9px;flex:none;box-shadow:0 0 0 4px rgba(34,211,238,.12);
}
.checks li b{color:var(--txt);font-weight:700}

.mini{border-radius:var(--r);border:1px solid var(--line);background:var(--panel);padding:24px;transition:transform .35s,border-color .35s,background .35s}
.mini:hover{border-color:var(--line-hi);background:var(--panel-hi);transform:translateY(-3px)}
.mini .m-ico{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:rgba(47,123,255,.1);border:1px solid rgba(47,123,255,.22);margin-bottom:15px}
.mini .m-ico svg{width:18px;height:18px;stroke:var(--brand-2);fill:none;stroke-width:1.8}
.mini h4{font-size:15.5px;margin-bottom:8px;font-weight:750}
.mini p{font-size:13.5px;color:var(--txt-2);line-height:1.72}

.spec{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:28px}
.spec > div{background:var(--bg-soft);padding:18px 20px}
.spec .k{font-size:11.5px;color:var(--txt-3);letter-spacing:.08em;margin-bottom:7px}
.spec .v{font-size:14.5px;font-weight:750}

.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line),transparent);border:0;margin:0}

/* 锚点跳转补偿（固定导航遮挡） */
[id]{scroll-margin-top:calc(var(--nav-h) + 24px)}

/* 点击复制 */
[data-copy]{cursor:pointer;border-bottom:1px dashed var(--line-hi);transition:color .25s,border-color .25s}
[data-copy]:hover{color:var(--brand-2);border-bottom-color:var(--brand-2)}

/* ---------- 18. 动画 ----------
   仅在 JS 可用时（html.js）才隐藏待显现元素，避免脚本失效导致内容不可见 */
html.js .reveal{
  opacity:0;transform:translateY(26px);
  transition:opacity .75s cubic-bezier(.2,.8,.2,1),transform .75s cubic-bezier(.2,.8,.2,1);
}
html.js .reveal.in{opacity:1;transform:none}
html.js .reveal.d1{transition-delay:.08s}
html.js .reveal.d2{transition-delay:.16s}
html.js .reveal.d3{transition-delay:.24s}
html.js .reveal.d4{transition-delay:.32s}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

.totop{
  position:fixed;right:24px;bottom:24px;z-index:800;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;transition:.35s;
  background:rgba(11,18,32,.9);border:1px solid var(--line-hi);backdrop-filter:blur(12px);
}
.totop.show{opacity:1;pointer-events:auto}
.totop:hover{border-color:var(--brand-2);transform:translateY(-3px)}
.totop svg{width:18px;height:18px;stroke:var(--txt);fill:none;stroke-width:2.2}

/* ---------- 19. 响应式 ---------- */
@media(max-width:1080px){
  .footer-main{grid-template-columns:1fr 1fr;gap:34px}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:900px){
  .nav-links,.nav-cta .btn{display:none}
  .nav-toggle{display:block}
  .split{grid-template-columns:1fr;gap:34px}
  .stack{grid-template-columns:repeat(2,1fr)}
  .g-3,.g-4{grid-template-columns:repeat(2,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:26px 0}
  .hero-stats .stat:nth-child(2){border-right:0}
  .hero-stats .stat:nth-child(3){padding-top:22px;border-top:1px solid var(--line)}
  .hero-stats .stat:nth-child(4){padding-top:22px;border-top:1px solid var(--line);border-right:0}
  .section{padding:76px 0}
  .cta-box{padding:48px 26px}
}
@media(max-width:640px){
  :root{--nav-h:60px}
  .wrap{padding:0 18px}
  .g-2,.g-3,.g-4,.g-auto{grid-template-columns:1fr}
  .stack{grid-template-columns:1fr}
  .adv{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr;gap:26px}
  .flow .f{padding-right:0}
  .flow .f::after{display:none}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 54px)}
  .hero-stats{margin-top:52px}
  .field-row{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr;gap:30px;padding:46px 0 34px}
  .license{flex-direction:column;align-items:flex-start}
  .license .ph{width:100%;max-width:320px}
  .card{padding:26px 22px}
  .logo-text span{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important}
  html.js .reveal{opacity:1;transform:none}
}