/* ============================================================
   北京汤普思达官网 · 交互增强版样式系统
   10 条交互提案对应：见文件内 [提案 N] 标记
   ============================================================ */
:root{
  --bg:#04060e;
  --panel:rgba(255,255,255,.04);
  --line:rgba(255,255,255,.09);
  --txt:#e9eefb;
  --dim:#93a0c0;
  --cy:#22d3ee; --bl:#4c7dff; --pu:#8b5cf6;
  --grad:linear-gradient(120deg,#22d3ee 0%,#4c7dff 48%,#8b5cf6 100%);
  --mono:"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box}
/* 排版防孤字：标题均衡换行，正文避免末行孤字/孤标点 */
h1,h2,h3,h4{text-wrap:balance}
p,.lead,.sub,li,figcaption{text-wrap:pretty}
html{scroll-behavior:auto}
body{
  background:var(--bg);color:var(--txt);overflow-x:hidden;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
li{list-style:none}
.container{max-width:1240px;margin:0 auto;padding:0 32px}
.mono{font-family:var(--mono)}

/* ============ 提案03 智能光标 ============ */
.cur,.cur-ring{position:fixed;top:0;left:0;z-index:9999;pointer-events:none;border-radius:50%;
  mix-blend-mode:difference;opacity:0;transition:opacity .3s}
.cur{width:7px;height:7px;background:#fff;margin:-3.5px 0 0 -3.5px}
.cur-ring{width:38px;height:38px;border:1.5px solid #fff;margin:-19px 0 0 -19px;
  display:grid;place-items:center;transition:width .35s var(--ease),height .35s var(--ease),
  background .3s,margin .35s var(--ease),opacity .3s}
.cur-ring span{font-size:11.5px;letter-spacing:1px;color:#04060e;font-weight:700;opacity:0;transition:.2s}
body.cur-on .cur,body.cur-on .cur-ring{opacity:1}
body.cur-big .cur-ring{width:92px;height:92px;margin:-46px 0 0 -46px;background:#fff}
body.cur-big .cur-ring span{opacity:1}
body.cur-big .cur{opacity:0}
@media(hover:none),(pointer:coarse){.cur,.cur-ring{display:none}}

/* ============ 提案02 持久背景层（不随页面切换重载）============ */
#bg-layer{position:fixed;inset:0;z-index:0;pointer-events:none}
/* 地形画布：ApeChain 风格流态网格（克制版） */
#terrain{position:absolute;inset:0;width:100%;height:100%;display:block}
#terrain-fade{position:absolute;inset:0;
  background:linear-gradient(180deg,
    rgba(4,6,14,.88) 0%,
    rgba(4,6,14,.5) 24%,
    rgba(4,6,14,.04) 45%,
    rgba(4,6,14,.26) 74%,
    rgba(4,6,14,.9) 100%)}
#bg-layer .bg-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 15%,transparent 72%);
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 15%,transparent 72%)}
#bg-layer .glow{position:absolute;border-radius:50%;filter:blur(130px);opacity:.42}
.g1{width:600px;height:600px;background:#1d4ed8;top:-200px;left:-140px;animation:fl1 20s ease-in-out infinite}
.g2{width:520px;height:520px;background:#0e7490;top:-80px;right:-160px;animation:fl2 25s ease-in-out infinite}
.g3{width:460px;height:460px;background:#6d28d9;top:58%;left:36%;opacity:.24;animation:fl1 30s ease-in-out infinite}
@keyframes fl1{0%,100%{transform:translate(0,0)}50%{transform:translate(60px,44px)}}
@keyframes fl2{0%,100%{transform:translate(0,0)}50%{transform:translate(-52px,34px)}}

/* ============ 提案01 幕布式页面转场 ============ */
#curtain{position:fixed;inset:0;z-index:900;pointer-events:none;
  transform:scaleY(0);transform-origin:bottom;
  background:linear-gradient(180deg,#060b1c,#0a1226 45%,#12082a);
  display:grid;place-items:center}
#curtain .cl{font-size:clamp(22px,4vw,40px);font-weight:700;letter-spacing:10px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  opacity:0;transition:opacity .35s}
body.leaving #curtain{transform:scaleY(1);transition:transform .62s cubic-bezier(.75,0,.25,1)}
body.leaving #curtain .cl{opacity:1}
body.entering #curtain{transform:scaleY(0);transform-origin:top;transition:transform .68s cubic-bezier(.75,0,.25,1)}
#progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:950;background:var(--grad);
  box-shadow:0 0 12px rgba(34,211,238,.7);transition:width .3s,opacity .4s;opacity:0}

/* ============ 导航 ============ */
header{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s;
  border-bottom:1px solid transparent}
header.on{background:rgba(4,6,14,.72);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:inline-block;font-weight:900;font-size:22px;letter-spacing:3.5px;line-height:1.05;
  -webkit-text-stroke:.45px rgba(200,228,255,.4);      /* 加粗：字重 + 极细描边增厚 */
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo span{display:inline-block}
/* 副标题：无衬线字体，在 LOGO 宽度内水平居中，保持正常字距不拉伸 */
.logo i{display:block;width:100%;text-align:center;
  font-style:normal;
  font-family:"PingFang SC","HarmonyOS Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:10px;font-weight:500;letter-spacing:2.4px;
  color:var(--dim);-webkit-text-fill-color:var(--dim);margin-top:2px;white-space:nowrap}
nav ul{display:flex;gap:8px;align-items:center}
nav ul a{display:block;padding:9px 18px;border-radius:999px;font-size:15px;color:var(--dim);
  transition:.3s;position:relative}
nav ul a:hover{color:#fff;background:rgba(255,255,255,.06)}
nav ul a.active{color:#fff;background:rgba(255,255,255,.08)}
.nav-cta{padding:11px 24px;border-radius:999px;font-size:14.5px;font-weight:600;color:#04060e;
  background:var(--grad);box-shadow:0 8px 26px rgba(76,125,255,.4);cursor:pointer;
  transition:.35s var(--ease);display:inline-block}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(76,125,255,.6)}

/* ============ 提案10 导航悬停即时预览 ============ */
.nav-prev{position:absolute;top:70px;left:0;right:0;display:flex;justify-content:center;
  pointer-events:none;opacity:0;transform:translateY(-10px);transition:.35s var(--ease)}
.nav-prev.on{opacity:1;transform:none;pointer-events:auto}
.nav-prev .box{margin-top:10px;padding:20px;border-radius:20px;border:1px solid var(--line);
  background:rgba(8,12,24,.9);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
  box-shadow:0 24px 60px rgba(0,0,0,.5);display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.nav-prev .it{padding:14px 16px;border-radius:13px;border:1px solid transparent;transition:.3s;
  background:rgba(255,255,255,.03);opacity:0;transform:translateY(8px)}
.nav-prev.on .it{animation:pin .45s var(--ease) forwards}
.nav-prev .it:nth-child(2){animation-delay:.05s}.nav-prev .it:nth-child(3){animation-delay:.1s}
.nav-prev .it:nth-child(4){animation-delay:.15s}.nav-prev .it:nth-child(5){animation-delay:.2s}
.nav-prev .it:nth-child(6){animation-delay:.25s}
@keyframes pin{to{opacity:1;transform:none}}
.nav-prev .it:hover{border-color:rgba(34,211,238,.4);background:rgba(255,255,255,.07)}
.nav-prev .ic{margin-bottom:8px}
.nav-prev .ic img{width:34px;height:34px;object-fit:contain;border-radius:50%;display:block;
  background:rgba(255,255,255,.06)}
.nav-prev h5{font-size:14.5px;margin-bottom:3px}
.nav-prev p{font-size:12px;color:var(--dim);line-height:1.6}

/* ============ 通用板块 ============ */
section{position:relative;z-index:1;padding:110px 0}
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:3.5px;color:var(--cy);
  text-transform:uppercase;margin-bottom:14px}
h2{font-size:clamp(27px,3.6vw,42px);font-weight:700;letter-spacing:-.6px;margin-bottom:16px}
.lead{color:var(--dim);max-width:680px;font-size:16px}
.center{text-align:center}
.center .lead{margin:0 auto}

/* ============ 提案07 标题逐词揭示 + 流光 ============ */
.split .w{display:inline-block;opacity:0;transform:translateY(28px);filter:blur(9px)}
.split.in .w{animation:wordup .95s var(--ease) forwards}
@keyframes wordup{to{opacity:1;transform:none;filter:blur(0)}}
.shine{background:linear-gradient(100deg,#7dd3fc 0%,#fff 16%,#c4b5fd 34%,#7dd3fc 52%,#fff 70%,#c4b5fd 88%,#7dd3fc 100%);
  background-size:230% auto;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:sh 7s linear infinite;filter:drop-shadow(0 0 26px rgba(125,211,252,.25))}
@keyframes sh{to{background-position:230% center}}
.rv{opacity:0;transform:translateY(32px);transition:.9s var(--ease)}
.rv.in{opacity:1;transform:none}

/* ============ Hero ============ */
/* 首屏：内容从固定高度起排，保证粒子 LOGO 稳定落在导航栏与标签之间 */
.hero{position:relative;z-index:1;padding:110px 0 90px;text-align:center;min-height:100vh;
  display:flex;align-items:flex-start;justify-content:center}
#logo-particles{position:absolute;top:112px;left:0;right:0;width:100%;height:250px;
  pointer-events:none;opacity:.95}
.hero-in{position:relative;width:100%;padding-top:256px}   /* 让位给粒子区，标签紧随其下 */
.tagline{display:inline-flex;align-items:center;gap:10px;padding:8px 18px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);font-size:13px;color:var(--dim);
  font-family:var(--mono);letter-spacing:.5px}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--cy);box-shadow:0 0 12px var(--cy);
  animation:pl 2s infinite}
@keyframes pl{0%,100%{opacity:1}50%{opacity:.25}}
h1{font-size:clamp(38px,6vw,72px);line-height:1.16;font-weight:700;margin:34px 0 22px;letter-spacing:-1.2px}
.sub{max-width:700px;margin:0 auto;color:var(--dim);font-size:17px}
.cta-row{display:flex;gap:14px;justify-content:center;margin-top:40px;flex-wrap:wrap}
.btn{padding:13px 30px;border-radius:999px;font-size:15px;cursor:pointer;transition:.35s var(--ease);
  border:1px solid transparent;display:inline-block}
.btn-p{background:var(--grad);color:#04060e;font-weight:600;box-shadow:0 10px 30px rgba(76,125,255,.4)}
.btn-o{border-color:var(--line);background:var(--panel);color:var(--txt)}
.btn-o:hover{border-color:rgba(255,255,255,.28);background:rgba(255,255,255,.08)}
.badges{display:flex;gap:14px;justify-content:center;margin-top:60px;flex-wrap:wrap}
.badge{padding:12px 22px;border-radius:14px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  font-size:13.5px;color:var(--dim);backdrop-filter:blur(10px);transition:.4s var(--ease);
  display:inline-flex;align-items:center;gap:9px}
.badge:hover{transform:translateY(-5px);border-color:rgba(34,211,238,.45);color:#fff}
.badge b{color:#fff}
/* 徽章图标：统一线性风格，按语义各自表意 */
.badge svg.bi{width:19px;height:19px;flex-shrink:0;color:var(--cy)}

/* ============ 数据条 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:20px;overflow:hidden}
.stat{background:#060a15;padding:36px 24px;text-align:center;transition:.4s}
.stat:hover{background:#0a1020}
.stat .n{font-size:40px;font-weight:700;font-family:var(--mono);
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .t{color:var(--dim);font-size:14px;margin-top:4px}

/* ============ 提案08 产品卡 3D tilt ============ */
.stage{perspective:1300px}
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;margin-top:54px}
.card{grid-column:span 2;padding:30px;border-radius:22px;position:relative;overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  transform-style:preserve-3d;transition:box-shadow .45s var(--ease),border-color .35s}
.card.wide{grid-column:span 3}
.card:hover{border-color:rgba(34,211,238,.4);box-shadow:0 26px 60px rgba(34,211,238,.16)}
.card .gl{position:absolute;inset:0;pointer-events:none;opacity:0;transition:.4s;border-radius:22px;
  background:radial-gradient(320px circle at var(--gx,50%) var(--gy,50%),rgba(255,255,255,.13),transparent 65%)}
.card:hover .gl{opacity:1}
.card .in{transform-style:preserve-3d}
/* 产品 LOGO：统一圆形（品牌各自底色，App 图标式呈现） */
.card .ic{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  margin-bottom:18px;overflow:hidden;transform:translateZ(42px);
  background:rgba(255,255,255,.05);border:1px solid var(--line)}
.card .ic img{width:100%;height:100%;object-fit:contain;display:block}
.card h3{font-size:20px;font-weight:600;transform:translateZ(34px)}
.card .en{font-family:var(--mono);font-size:10.5px;letter-spacing:2px;color:var(--dim);
  margin:3px 0 14px;transform:translateZ(30px)}
.card p{font-size:14.5px;color:var(--dim);transform:translateZ(22px)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;transform:translateZ(18px)}
.chip{font-size:12px;padding:5px 11px;border-radius:8px;background:rgba(255,255,255,.06);
  border:1px solid var(--line);color:var(--dim)}
.from{position:absolute;top:24px;right:26px;font-family:var(--mono);font-size:10px;letter-spacing:1.5px;
  color:var(--dim);border:1px solid var(--line);border-radius:6px;padding:3px 9px}

/* ============ 提案05 聚光灯揭示 ============ */
.spot{position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--line);padding:56px 40px}
.spot .dim{position:absolute;inset:0;background:
  linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px) 0 0/46px 46px,
  linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px) 0 0/46px 46px}
.spot .bright{position:absolute;inset:0;
  background:
    radial-gradient(600px circle at var(--sx,50%) var(--sy,50%),rgba(34,211,238,.16),transparent 62%),
    linear-gradient(135deg,rgba(76,125,255,.16),rgba(139,92,246,.14));
  -webkit-mask-image:radial-gradient(300px circle at var(--sx,50%) var(--sy,50%),#000 0%,rgba(0,0,0,.5) 42%,transparent 72%);
  mask-image:radial-gradient(300px circle at var(--sx,50%) var(--sy,50%),#000 0%,rgba(0,0,0,.5) 42%,transparent 72%)}
.spot .inner{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.spot h3{font-size:16px;margin-bottom:6px}
.spot p{font-size:13.5px;color:var(--dim)}
.spot .top{position:relative;text-align:center;margin-bottom:36px}
.spot .hint{position:relative;text-align:center;margin-top:32px;font-family:var(--mono);
  font-size:11.5px;letter-spacing:2px;color:#5f6b88}

/* ============ 优势 ============ */
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.adv > div{padding:28px;border-radius:18px;border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.045),transparent);transition:.45s var(--ease)}
.adv > div:hover{border-color:rgba(139,92,246,.45);transform:translateY(-7px)}
.adv .k{font-family:var(--mono);font-size:12.5px;color:var(--pu);letter-spacing:2px}
.adv h4{font-size:17px;margin:12px 0 8px}
.adv p{font-size:14px;color:var(--dim)}

/* ============ 提案06 滚动驱动叙事 ============ */
.story{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.sticky{position:sticky;top:120px}
.sticky .num{font-family:var(--mono);font-size:13px;letter-spacing:3px;color:var(--cy)}
.sticky h2{margin:14px 0 16px}
.steps{display:flex;flex-direction:column;gap:26px}
.step{padding:26px 28px;border-radius:18px;border:1px solid var(--line);
  background:var(--panel);transition:.55s var(--ease);opacity:.32;transform:translateX(26px)}
.step.on{opacity:1;transform:none;border-color:rgba(34,211,238,.35);
  box-shadow:0 14px 40px rgba(34,211,238,.1)}
.step h4{font-size:18px;margin-bottom:6px;display:flex;align-items:center;gap:12px}
.step h4 i{font-style:normal;font-family:var(--mono);font-size:12px;color:var(--cy)}
.step p{font-size:14.5px;color:var(--dim)}

/* ============ 流程 / CTA ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:54px;position:relative}
.flow::before{content:"";position:absolute;top:38px;left:8%;right:8%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(34,211,238,.55),rgba(139,92,246,.55),transparent)}
.fstep{text-align:center}
.fstep .no{width:76px;height:76px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;
  background:#070c18;border:1px solid var(--line);font-family:var(--mono);font-size:21px;color:var(--cy);
  position:relative;z-index:1;transition:.45s var(--ease)}
.fstep:hover .no{box-shadow:0 0 36px rgba(34,211,238,.32);border-color:rgba(34,211,238,.55)}
.fstep h4{font-size:16.5px;margin-bottom:5px}
.fstep p{font-size:13.5px;color:var(--dim)}

.cta-box{margin-top:10px;padding:70px 40px;border-radius:28px;text-align:center;position:relative;overflow:hidden;
  border:1px solid var(--line);background:linear-gradient(135deg,rgba(34,211,238,.1),rgba(139,92,246,.1))}
.cta-box .scanline{position:absolute;left:0;right:0;height:2px;opacity:.6;
  background:linear-gradient(90deg,transparent,var(--cy),transparent);animation:scanl 5.5s linear infinite}
@keyframes scanl{0%{top:0}100%{top:100%}}
.cta-box h2{margin-bottom:14px}

/* ============ 内页：产品 ============ */
.prod{padding:44px 0;border-bottom:1px solid var(--line)}
.prod:last-of-type{border-bottom:0}
.prod .row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.prod:nth-child(even) .row{direction:rtl}
.prod:nth-child(even) .row > *{direction:ltr}
.prod h3{font-size:30px;font-weight:700;margin-bottom:6px;letter-spacing:-.5px}
.prod .en{font-family:var(--mono);font-size:11px;letter-spacing:3px;color:var(--cy);margin-bottom:18px}
.prod p.desc{color:var(--dim);font-size:16px;margin-bottom:22px}
.feat{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:26px}
.feat div{padding:14px 16px;border-radius:12px;border:1px solid var(--line);background:var(--panel);
  font-size:13.5px;transition:.35s}
.feat div:hover{border-color:rgba(34,211,238,.35);color:#fff}
.feat b{display:block;font-size:14.5px;margin-bottom:2px}
.visual{aspect-ratio:16/10;border-radius:22px;border:1px solid var(--line);position:relative;overflow:hidden;
  background:
    radial-gradient(120% 90% at 80% 0%,rgba(34,211,238,.14),transparent 55%),
    radial-gradient(120% 100% at 10% 100%,rgba(139,92,246,.12),transparent 55%),
    linear-gradient(150deg,#0a1122,#0d1630)}
.visual::before{content:"";position:absolute;inset:0;opacity:.5;z-index:1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:40px 40px;
  -webkit-mask-image:radial-gradient(80% 80% at 50% 40%,#000,transparent);
  mask-image:radial-gradient(80% 80% at 50% 40%,#000,transparent)}
/* 官网图片轮播：截图完整显示不裁切；无官网横图的产品用品牌卡片，不放大不糊 */
.visual .slides{position:absolute;inset:0}
.visual .slides > *{position:absolute;inset:0;opacity:0;transition:opacity 1s ease}
.visual .slides > .on{opacity:1}
.visual .slide.shot{background:linear-gradient(150deg,#0a1122,#0d1630);
  display:grid;place-items:center;padding:14px}
.visual .slide.shot img{width:100%;height:100%;object-fit:contain;border-radius:12px}
.visual .slides > .on .slide-img{animation:kb 9s ease-out forwards}
@keyframes kb{from{transform:scale(1.035)}to{transform:scale(1)}}
.visual .slide.card-slide{display:grid;place-content:center;justify-items:center;gap:9px;
  text-align:center;padding:30px;
  background:radial-gradient(120% 100% at 50% 0%,rgba(34,211,238,.15),transparent 62%),
             linear-gradient(150deg,#0a1122,#0d1630)}
.visual .slide.card-slide.light{background:#f2f5fa;color:#0a1122}
.visual .slide.card-slide img.sm{width:72px;height:72px;object-fit:contain;border-radius:50%;
  background:rgba(255,255,255,.06)}
.visual .slide.card-slide.light img.sm{background:#fff}
.visual .slide.card-slide h5{font-size:17px;font-weight:600;letter-spacing:.3px}
.visual .slide.card-slide p{font-size:12.5px;color:var(--dim)}
.visual .slide.card-slide.light p{color:#5a6478}
/* 双平台卡片：阿里云 + 腾讯云 并排 */
.visual .slide.card-slide.dual .pair{display:flex;gap:14px;margin-bottom:6px}
.visual .slide.card-slide.dual .pair img{width:58px;height:58px;border-radius:50%;object-fit:contain;
  padding:5px;background:rgba(255,255,255,.07);border:1px solid var(--line)}
.visual .cap{position:absolute;left:0;right:0;bottom:54px;text-align:center;z-index:2;
  font-family:var(--mono);font-size:11px;letter-spacing:2.5px;color:var(--dim)}
.visual .dots{position:absolute;left:0;right:0;bottom:38px;display:flex;gap:7px;justify-content:center;z-index:2}
.visual .dots i{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.22);transition:.35s}
.visual .dots i.on{background:var(--cy);box-shadow:0 0 8px rgba(34,211,238,.7)}
.visual .bar{position:absolute;left:22px;right:22px;bottom:22px;height:6px;border-radius:6px;
  background:rgba(255,255,255,.08);overflow:hidden;z-index:2}
.visual .bar i{position:absolute;inset:0;width:0;background:var(--grad);border-radius:6px;
  transition:width 1.3s var(--ease)}
.visual.in .bar i{width:var(--p,70%)}

/* ============ 内页：关于 ============ */
.tl{position:relative;margin-top:46px;padding-left:34px}
.tl::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:1px;
  background:linear-gradient(180deg,transparent,var(--cy),var(--pu),transparent)}
.tl .ev{position:relative;padding:0 0 40px 0;opacity:0;transform:translateX(-24px);transition:.8s var(--ease)}
.tl .ev.in{opacity:1;transform:none}
.tl .ev::before{content:"";position:absolute;left:-33px;top:8px;width:15px;height:15px;border-radius:50%;
  background:#060a15;border:2px solid var(--cy);box-shadow:0 0 16px rgba(34,211,238,.6)}
.tl .yr{font-family:var(--mono);font-size:13px;color:var(--cy);letter-spacing:2px}
.tl h4{font-size:19px;margin:6px 0 6px}
.tl p{font-size:14.5px;color:var(--dim);max-width:620px}

/* ============ 内页：联系 ============ */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;margin-top:20px}
.info div{margin-bottom:26px}
.info .k{font-family:var(--mono);font-size:11.5px;letter-spacing:2.5px;color:var(--cy);margin-bottom:6px}
.info .v{font-size:17px}
.info .v.small{font-size:15px;color:var(--dim)}
.form{display:grid;gap:16px}
.form input,.form textarea,.form select{width:100%;padding:15px 18px;border-radius:14px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt);font-size:15px;
  font-family:inherit;transition:.3s;outline:none}
.form input:focus,.form textarea:focus,.form select:focus{border-color:rgba(34,211,238,.55);
  background:rgba(255,255,255,.07);box-shadow:0 0 0 4px rgba(34,211,238,.08)}
.form textarea{min-height:120px;resize:vertical}
/* ---------- 联系页：自绘线条示意地图（匹配站色，无外部依赖） ---------- */
.map{margin-top:44px;aspect-ratio:21/9;min-height:320px;border-radius:22px;border:1px solid var(--line);
  position:relative;overflow:hidden;background:linear-gradient(150deg,#070c1a,#0b1226 60%,#0a1020)}
.map::before{content:"";position:absolute;inset:0;opacity:.45;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(92% 92% at 50% 50%,#000,transparent);
  mask-image:radial-gradient(92% 92% at 50% 50%,#000,transparent)}
.map .citymap{position:absolute;inset:0;width:100%;height:100%}
.map .mainroad{filter:drop-shadow(0 0 10px rgba(34,211,238,.45))}
.map .mainroad-flow{animation:roadflow 7s linear infinite}
@keyframes roadflow{to{stroke-dashoffset:-366}}
.map .ring{fill:none;stroke:rgba(34,211,238,.75);stroke-width:1.4;
  transform-origin:404px 196px;animation:mapring 2.8s ease-out infinite}
.map .ring.r2{animation-delay:1.4s}
@keyframes mapring{0%{transform:scale(.45);opacity:.9}100%{transform:scale(2.6);opacity:0}}
.map .core{fill:var(--cy);filter:drop-shadow(0 0 12px rgba(34,211,238,.95))}
.map text{font-family:"PingFang SC",system-ui,sans-serif}
.map .mlabel{font-size:11px;fill:#9aa7c6}
.map .pintxt{font-size:12.5px;fill:#e9f6ff;text-anchor:middle}
.map .ptxt{font-size:11.5px;fill:#8fa0c2;text-anchor:middle;letter-spacing:1px}
.map .pinmark{animation:rise .8s var(--ease) both}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.map-label{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;
  padding:14px 26px;border-radius:16px;background:rgba(7,12,24,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);box-shadow:0 16px 40px rgba(0,0,0,.45);max-width:92%}
.map-label b{font-size:14.5px}
.map-label span{font-size:12px;color:var(--dim)}
.map-label a{font-size:12.5px;color:var(--cy);margin-top:2px}
.map-label a:hover{text-decoration:underline}

/* ============ 页脚 ============ */
footer{position:relative;z-index:1;border-top:1px solid var(--line);padding:62px 0 30px;margin-top:50px}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
footer h5{font-size:15px;margin-bottom:18px}
footer li{font-size:14px;color:var(--dim);margin-bottom:10px;transition:.25s;cursor:pointer}
footer li:hover{color:#fff}
.fbot{margin-top:46px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#68738d}
.fbot a{color:#68738d}
.fbot a:hover{color:var(--cy)}

/* ============ 页头（内页） ============ */
.pagehead{padding:170px 0 40px;position:relative;z-index:1}
.pagehead h1{font-size:clamp(34px,5vw,58px);margin:16px 0 18px}
.crumb{font-family:var(--mono);font-size:11.5px;letter-spacing:2px;color:var(--dim)}

/* ---------- 汉堡菜单按钮（仅小屏显示） ---------- */
.menu-btn{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;
  background:rgba(255,255,255,.04);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4.5px;flex-shrink:0}
.menu-btn i{display:block;width:17px;height:1.6px;background:var(--txt);border-radius:2px;transition:.3s}
body.menu-open .menu-btn i:nth-child(1){transform:translateY(6.1px) rotate(45deg)}
body.menu-open .menu-btn i:nth-child(2){opacity:0}
body.menu-open .menu-btn i:nth-child(3){transform:translateY(-6.1px) rotate(-45deg)}

@media(max-width:980px){
  .bento{grid-template-columns:repeat(2,1fr)}
  .card,.card.wide{grid-column:span 1}
  .stats,.adv,.flow{grid-template-columns:repeat(2,1fr)}
  .flow::before{display:none}
  .story,.prod .row,.contact-grid{grid-template-columns:1fr;gap:36px}
  .prod:nth-child(even) .row{direction:ltr}
  .sticky{position:static}
  .fgrid{grid-template-columns:1fr 1fr}
  .spot .inner{grid-template-columns:1fr}
  /* 移动端导航：汉堡按钮 + 下拉面板 */
  .menu-btn{display:flex}
  nav ul{position:fixed;top:74px;left:0;right:0;
    flex-direction:column;gap:0;display:flex;
    padding:10px 24px 22px;
    background:rgba(4,6,14,.97);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);box-shadow:0 20px 50px rgba(0,0,0,.5);
    transform:translateY(-14px);opacity:0;pointer-events:none;transition:.35s var(--ease)}
  body.menu-open nav ul{transform:none;opacity:1;pointer-events:auto}
  nav ul a{padding:15px 0;font-size:17px;border-bottom:1px solid rgba(255,255,255,.06);
    border-radius:0;background:none}
  nav ul a.active{background:none;color:var(--cy)}
  nav ul a.active::after{display:none}
  nav ul a:hover{background:none}
  .nav-cta{padding:9px 18px;font-size:13.5px}
}
@media(max-width:600px){
  .stats,.adv,.flow{grid-template-columns:1fr}
  /* 移动端首屏不强制满屏：内容自然高度，避免徽章下方大片空白 */
  .hero{padding:88px 0 40px;min-height:auto}
  #logo-particles{top:88px;height:140px}
  .hero-in{padding-top:146px}
  .cta-row{margin-top:26px}
  .badges{margin-top:30px}
  .badges{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .badge{justify-content:center;padding:11px 12px;font-size:12.5px;text-align:center}
  .map{aspect-ratio:4/3;min-height:300px}
  .fgrid{grid-template-columns:1fr}
  h1{font-size:clamp(30px,8.4vw,40px)}
  .c3,.visual{border-radius:18px}
  .container{padding:0 20px}
  section{padding:72px 0}
  .spot{padding:36px 22px}
  .cta-box{padding:46px 22px}
  .pagehead{padding:140px 0 30px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}