/* ============================================================
   StarAI 星算 · 设计系统
   深色科技风：近黑底 + 青(数据/合规)/绿(算力/能源)双主色
   ============================================================ */
:root{
  --bg:#0a0e10;
  --bg-2:#0d1316;
  --bg-3:#10181b;
  --panel:rgba(255,255,255,.028);
  --panel-2:rgba(255,255,255,.05);
  --border:rgba(255,255,255,.08);
  --border-2:rgba(255,255,255,.14);
  --text:#e9edee;
  --text-2:#9ba7a9;
  --text-3:#62706f;
  --cyan:#22d3ee;
  --cyan-dim:rgba(34,211,238,.12);
  --green:#34d399;
  --green-dim:rgba(52,211,153,.10);
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Consolas,"Courier New",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --radius:14px;
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
::selection{background:rgba(52,211,153,.25)}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 32px}
section{padding:110px 0;position:relative}

/* ---------- 眉标 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--green);margin-bottom:18px;
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--green);flex:none}
.eyebrow.cyan{color:var(--cyan)}.eyebrow.cyan::before{background:var(--cyan)}
.eyebrow .en{opacity:.55;font-size:11px;letter-spacing:.14em}

/* ---------- 标题 ---------- */
.h1{font-size:clamp(34px,4.6vw,56px);line-height:1.18;font-weight:700;letter-spacing:-.01em}
.h2{font-size:clamp(28px,3.4vw,42px);line-height:1.22;font-weight:700;letter-spacing:-.01em;margin-bottom:20px}
.lead{color:var(--text-2);font-size:17px;max-width:640px}
.section-head{margin-bottom:56px}

/* ---------- 按钮三级 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:9px;
  font-size:14.5px;font-weight:600;transition:.25s;cursor:pointer;border:1px solid transparent}
.btn-solid{background:#f2f5f5;color:#0b0f10}
.btn-solid:hover{background:#fff;transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--text);border-color:var(--border-2)}
.btn-outline:hover{border-color:var(--green);color:var(--green);transform:translateY(-2px)}
.btn-text{padding:12px 4px;color:var(--text-2);font-weight:500}
.btn-text:hover{color:var(--green)}
.btn-text .arr{transition:.25s;display:inline-block}
.btn-text:hover .arr{transform:translateX(4px)}

/* ---------- 标签 pill ---------- */
.pills{display:flex;flex-wrap:wrap;gap:10px}
.pill{font-family:var(--mono);font-size:12.5px;color:var(--text-2);
  border:1px solid var(--border);border-radius:999px;padding:7px 16px}
.tag{font-size:12.5px;color:var(--text-2);background:var(--panel-2);
  border:1px solid var(--border);border-radius:7px;padding:5px 12px}
.tags{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s;
  border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(10,14,16,.82);backdrop-filter:blur(14px);
  border-bottom-color:var(--border)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 32px;height:68px;
  display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:17px;letter-spacing:.01em}
.brand small{display:block;font-size:10.5px;font-weight:400;color:var(--text-3);letter-spacing:.06em}
.brand-logo{width:30px;height:30px;flex:none}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-links a{font-size:14px;color:var(--text-2);padding:8px 14px;border-radius:8px;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--panel-2)}
.nav-lang{font-family:var(--mono);font-size:12.5px;color:var(--text-2);
  border:1px solid var(--border);border-radius:8px;padding:7px 12px;background:transparent}
.nav-lang .off{opacity:.35;cursor:not-allowed}
.nav-cta{padding:9px 20px;font-size:13.5px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--border);
  border-radius:8px;width:40px;height:40px;color:var(--text);cursor:pointer}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;padding:150px 0 90px;
  position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-bg::before{content:"";position:absolute;inset:0;
  background:
   radial-gradient(700px 460px at 78% 30%,rgba(52,211,153,.075),transparent 65%),
   radial-gradient(560px 420px at 12% 78%,rgba(34,211,238,.05),transparent 65%);}
.hero-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 80% at 50% 40%,#000 30%,transparent 75%)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero h1{margin:0 0 24px}
.hero .lead{margin-bottom:36px}
.hero-ctas{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.hero-visual{position:relative}

/* Hero 闭环视图 */
.loop-panel{position:relative;background:linear-gradient(160deg,var(--bg-3),var(--bg-2));
  border:1px solid var(--border);border-radius:18px;padding:26px;
  box-shadow:0 30px 80px rgba(0,0,0,.45)}
.loop-head{display:flex;justify-content:space-between;align-items:center;
  font-family:var(--mono);font-size:11.5px;color:var(--text-3);letter-spacing:.12em;
  padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:8px}
.loop-head .ok{color:var(--green)}
.loop-svg{width:100%;height:auto}
.loop-foot{display:flex;justify-content:space-between;gap:10px;padding-top:14px;
  border-top:1px solid var(--border);margin-top:8px}
.loop-foot div{font-size:12px;color:var(--text-3)}
.loop-foot b{display:block;font-family:var(--mono);font-size:15px;color:var(--text);font-weight:600}

/* ---------- 面板通用 ---------- */
.panel{background:linear-gradient(165deg,var(--bg-3),var(--bg-2));
  border:1px solid var(--border);border-radius:18px}

/* ---------- 双架构地图 ---------- */
.map-wrap{display:grid;grid-template-columns:1.35fr .65fr;gap:28px;align-items:stretch}
.map-panel{padding:26px;position:relative;overflow:hidden}
.map-panel::before{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 380px at 60% 40%,rgba(34,211,238,.05),transparent 70%);pointer-events:none}
.china-map{width:100%;height:auto;position:relative}
.provinces path{fill:#0f1a1e;stroke:rgba(130,200,215,.24);stroke-width:.7;
  transition:fill .3s}
.provinces path:hover{fill:#142529}
.jd-frame{fill:rgba(255,255,255,.015);stroke:var(--border);stroke-dasharray:4 5}
.jd-line{fill:none;stroke:rgba(125,190,205,.35);stroke-width:.8}
.jd-label{font-size:10px;fill:var(--text-3);font-family:var(--mono)}
.flow{fill:none;stroke-width:1.4;stroke-dasharray:5 9;opacity:.5;
  animation:flowdash 2.6s linear infinite}
.flow-in{stroke:var(--cyan)}
.flow-west{stroke:var(--green)}
@keyframes flowdash{to{stroke-dashoffset:-28}}
.map-node{cursor:pointer}
.map-node .dot{transition:.25s}
.node-port .dot{fill:var(--cyan)}
.node-hub .dot{fill:var(--green)}
.node-sea .dot{fill:#7c8a8c}
.node-sea .sea-label{fill:#66757a}
.map-node .pulse{fill:none;stroke-width:1.4;opacity:0;transform-origin:center;transform-box:fill-box}
.node-port .pulse{stroke:var(--cyan)}
.node-hub .pulse{stroke:var(--green)}
.map-node .pulse{animation:pulse 2.8s ease-out infinite}
@keyframes pulse{0%{transform:scale(.5);opacity:.8}70%{opacity:0}100%{transform:scale(2.6);opacity:0}}
.node-label{font-size:12.5px;fill:var(--text);font-weight:600;paint-order:stroke;
  stroke:rgba(10,14,16,.85);stroke-width:3.5px}
.node-tip{opacity:0;pointer-events:none;transition:.2s}
.node-tip rect{fill:#101b1e;stroke:var(--border-2)}
.node-tip .tip-t{font-size:13px;font-weight:700;fill:var(--text)}
.node-tip .tip-s{font-size:10.5px;fill:var(--text-3);font-family:var(--mono)}
.map-node:hover .node-tip{opacity:1}
.map-node:hover .dot{r:6}
.map-legend{display:flex;gap:22px;flex-wrap:wrap;padding:16px 4px 0}
.map-legend span{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-2)}
.lg-dot{width:9px;height:9px;border-radius:50%;flex:none}
.lg-cyan{background:var(--cyan)}.lg-green{background:var(--green)}.lg-gray{background:#7c8a8c}
.lg-line{width:20px;height:0;border-top:2px dashed var(--green)}
.map-side{display:flex;flex-direction:column;gap:14px}
.map-side-card{flex:1;padding:20px 22px;display:flex;flex-direction:column;justify-content:center}
.map-side-card .num{font-family:var(--mono);font-size:26px;font-weight:700;color:var(--green);line-height:1.2}
.map-side-card .num em{font-style:normal;font-size:13px;color:var(--text-3);margin-left:6px}
.map-side-card p{font-size:13px;color:var(--text-2);margin-top:6px}

/* ---------- 动态控制台 ---------- */
.console-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:stretch}
.console-panel{padding:0;overflow:hidden;display:flex;flex-direction:column}
.console-head{display:flex;justify-content:space-between;align-items:center;
  padding:18px 24px;border-bottom:1px solid var(--border);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;color:var(--text-3)}
.console-head .ch-r{color:var(--cyan);transition:.3s}
.console-body{position:relative;flex:1;min-height:420px}
.console-svg{position:absolute;inset:0;width:100%;height:100%}
.console-svg path{fill:none;stroke:rgba(255,255,255,.10);stroke-width:1.3;transition:.35s}
.console-svg path.on{stroke:var(--green);stroke-width:1.8;stroke-dasharray:6 8;
  animation:flowdash 2.2s linear infinite}
.c-node{position:absolute;transform:translate(-50%,-50%);text-align:center;
  background:var(--bg-3);border:1px solid var(--border);border-radius:12px;
  padding:12px 18px;min-width:118px;transition:.35s;z-index:2}
.c-node .nd{width:9px;height:9px;border-radius:50%;background:#54626a;
  display:inline-block;margin-bottom:6px;transition:.35s}
.c-node b{display:block;font-size:14.5px;font-weight:700}
.c-node span{font-size:11px;color:var(--text-3);font-family:var(--mono)}
.c-node.on{border-color:rgba(52,211,153,.55);background:#12211d;
  box-shadow:0 0 0 1px rgba(52,211,153,.2),0 14px 40px rgba(0,0,0,.4)}
.c-node.on .nd{background:var(--green);box-shadow:0 0 12px var(--green)}
.c-node.dim{opacity:.38}
.c-center{min-width:150px;padding:16px 22px;border-color:var(--border-2)}
.c-center .cb-eyebrow{font-family:var(--mono);font-size:10.5px;color:var(--text-3);letter-spacing:.14em;display:block;margin-bottom:4px}
.c-center b{font-size:20px}
.layer-list{display:flex;flex-direction:column;gap:14px}
.layer-card{text-align:left;background:var(--panel);border:1px solid var(--border);
  border-radius:14px;padding:20px 24px;cursor:pointer;transition:.3s;width:100%;
  color:var(--text);font-family:var(--sans)}
.layer-card .lc-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--text-3);display:block;margin-bottom:6px;text-transform:uppercase}
.layer-card h3{font-size:19px;font-weight:700}
.layer-card .lc-body{max-height:0;overflow:hidden;opacity:0;transition:.4s}
.layer-card p{font-size:14px;color:var(--text-2);margin:12px 0 14px}
.layer-card.on{background:linear-gradient(150deg,rgba(52,211,153,.10),rgba(52,211,153,.03));
  border-color:rgba(52,211,153,.4)}
.layer-card.on .lc-eyebrow{color:var(--green)}
.layer-card.on .lc-body{max-height:220px;opacity:1}
.layer-card:not(.on):hover{border-color:var(--border-2)}

/* ---------- 流水线 ---------- */
.pipeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.step{padding:28px 22px 30px;border-top:1px solid var(--border);position:relative;transition:.3s}
.step::before{content:"";position:absolute;top:-1px;left:0;width:44px;height:2px;
  background:var(--green);transition:.4s}
.step:hover::before{width:100%}
.step:hover{background:var(--panel)}
.step .no{font-family:var(--mono);font-size:34px;font-weight:700;color:transparent;
  -webkit-text-stroke:1px rgba(255,255,255,.22);display:block;margin-bottom:16px}
.step h3{font-size:17px;margin-bottom:4px}
.step .role{font-size:12.5px;color:var(--green);font-family:var(--mono);margin-bottom:14px;display:block}
.step .tags .tag{font-size:11.5px;padding:4px 10px}
.pipe-note{margin-top:26px;font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:10px}
.pipe-note::before{content:"";width:34px;height:1px;background:var(--border-2)}

/* ---------- 服务卡 ---------- */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px 28px;transition:.3s;position:relative;display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);border-color:rgba(52,211,153,.35);
  background:linear-gradient(160deg,rgba(52,211,153,.05),var(--panel))}
.card .c-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--cyan);text-transform:uppercase;display:block;margin-bottom:14px}
.card.green .c-eyebrow{color:var(--green)}
.card h3{font-size:20px;margin-bottom:12px}
.card>p{font-size:14px;color:var(--text-2);margin-bottom:20px;flex:1}
.card .tags{margin-bottom:22px}
.card .c-link{font-size:13.5px;color:var(--text-2);font-weight:600;display:inline-flex;gap:6px;align-items:center}
.card .c-link:hover{color:var(--green)}
.card .c-link .arr{transition:.25s}
.card .c-link:hover .arr{transform:translateX(4px)}

/* ---------- 大数字 ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.stat{padding:40px 34px;text-align:left}
.stat .n{font-family:var(--mono);font-size:clamp(34px,3.6vw,48px);font-weight:700;
  line-height:1.1;color:var(--text)}
.stat .n em{font-style:normal;font-size:.45em;color:var(--green);margin-left:4px}
.stat .d{margin-top:14px;font-size:14px;color:var(--text-2)}
.stat .s{margin-top:8px;font-family:var(--mono);font-size:11px;color:var(--text-3);letter-spacing:.08em}

/* ---------- 生态角色 ---------- */
.eco{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.eco-item{display:flex;gap:20px;padding:26px;border-top:1px solid var(--border)}
.eco-item .no{font-family:var(--mono);font-size:15px;color:var(--green);font-weight:700}
.eco-item h3{font-size:16.5px;margin-bottom:2px}
.eco-item span{font-size:12px;color:var(--cyan);font-family:var(--mono);display:block;margin-bottom:8px}
.eco-item p{font-size:13.5px;color:var(--text-2)}

/* ---------- 资源 ---------- */
.res-card .res-tag{display:inline-block;font-family:var(--mono);font-size:10.5px;
  letter-spacing:.1em;color:var(--cyan);border:1px solid rgba(34,211,238,.3);
  border-radius:6px;padding:3px 10px;margin-bottom:16px}
.res-card .res-date{font-family:var(--mono);font-size:11px;color:var(--text-3);float:right}
.res-card h3{font-size:17.5px;line-height:1.5}
.res-card .demo{color:#e8b34b;border-color:rgba(232,179,75,.35)}

/* ---------- 联系 ---------- */
.contact-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
.contact-info h2{margin-bottom:18px}
.contact-info p{color:var(--text-2);font-size:15px;margin-bottom:28px}
.contact-mail{font-family:var(--mono);font-size:17px;color:var(--green);
  display:inline-flex;align-items:center;gap:10px;padding:14px 22px;
  border:1px solid rgba(52,211,153,.3);border-radius:10px;background:var(--green-dim)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form .full{grid-column:1/-1}
.form label{display:block;font-size:12.5px;color:var(--text-2);margin-bottom:8px}
.form input,.form select,.form textarea{
  width:100%;background:var(--panel);border:1px solid var(--border);border-radius:10px;
  padding:13px 16px;color:var(--text);font-size:14px;font-family:var(--sans);
  outline:none;transition:.25s}
.form input:focus,.form select:focus,.form textarea:focus{
  border-color:var(--green);background:rgba(52,211,153,.04)}
.form select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239ba7a9' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center}
.form textarea{min-height:130px;resize:vertical}
.form-note{grid-column:1/-1;font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:8px}
.form-note::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green)}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--border);padding:70px 0 36px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(5,1fr);gap:32px;margin-bottom:50px}
.foot-brand p{font-size:13px;color:var(--text-3);margin-top:16px;max-width:240px}
.foot-col h4{font-size:13px;color:var(--text);margin-bottom:16px;font-weight:600}
.foot-col a{display:block;font-size:13px;color:var(--text-3);padding:5px 0;transition:.2s}
.foot-col a:hover{color:var(--green)}
.foot-bottom{border-top:1px solid var(--border);padding-top:26px;
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font-size:12px;color:var(--text-3)}
.foot-bottom .mono{font-family:var(--mono)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:560px}
  .map-wrap,.console-wrap,.contact-wrap{grid-template-columns:1fr}
  .cards-3,.stats,.eco{grid-template-columns:repeat(2,1fr)}
  .pipeline{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:640px){
  section{padding:76px 0}
  .container{padding:0 20px}
  .nav-links,.nav-lang{display:none}
  .nav-toggle{display:block}
  .nav.open .nav-links{display:flex;position:absolute;top:68px;left:0;right:0;
    flex-direction:column;background:rgba(10,14,16,.97);border-bottom:1px solid var(--border);
    padding:16px 20px;gap:4px}
  .cards-3,.stats,.eco,.pipeline,.form{grid-template-columns:1fr}
  .console-body{min-height:480px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .step::before{width:100%;background:var(--border-2)}
  .step:hover::before{background:var(--green)}
}

/* ---------- 3D 粒子地球（Hero） ---------- */
.globe-wrap{position:relative;width:100%;aspect-ratio:1/1.04;overflow:hidden;border-radius:12px}
.globe-wrap canvas{position:absolute;inset:0;display:block}
.globe-label{position:absolute;transform:translate(-50%,-50%);pointer-events:none;
  display:flex;align-items:center;gap:7px;white-space:nowrap;
  font-family:var(--mono);opacity:0;z-index:3}
.globe-label i{width:7px;height:7px;border-radius:50%;background:var(--green);
  box-shadow:0 0 9px var(--green);flex:none}
.globe-label b{font-size:12.5px;color:var(--text);font-weight:600}
.globe-label span{font-size:9.5px;color:var(--text-3);letter-spacing:.1em}

/* ---------- 节点网络页（network.html） ---------- */
.cards-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:768px){.cards-2{grid-template-columns:1fr}}
.node-status{position:absolute;top:22px;right:24px;font-family:var(--mono);
  font-size:10.5px;letter-spacing:.12em;color:var(--text-3)}
.map-node.focus .dot{r:7}
.map-node.focus .pulse{animation-duration:1.1s;opacity:.9}
.map-node.focus .node-label{fill:var(--green);font-size:13.5px}
.map-node.focus .node-tip{opacity:1}
.card.flash{animation:cardflash 1.6s ease}
@keyframes cardflash{
  0%,100%{border-color:var(--border);box-shadow:none}
  25%,60%{border-color:rgba(52,211,153,.7);box-shadow:0 0 0 1px rgba(52,211,153,.25),0 18px 50px rgba(0,0,0,.45)}
}
.synergy{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:768px){.synergy{grid-template-columns:1fr}}
.syn-item{padding:28px 30px;border-top:1px solid var(--border);background:var(--panel);
  border-radius:0 0 var(--radius) var(--radius);border-top:2px solid rgba(52,211,153,.5)}
.syn-item h3{font-size:17px;margin-bottom:10px}
.syn-item h3::before{content:"";display:inline-block;width:8px;height:8px;background:var(--green);
  margin-right:10px;vertical-align:1px}
.syn-item p{font-size:14px;color:var(--text-2)}

/* ---------- 导航下拉菜单（Mega Menu） ---------- */
.nav-links .nl{font-size:14px;color:var(--text-2);padding:8px 14px;border-radius:8px;transition:.2s}
.nav-links .nl:hover,.nav-links .nl.active{color:var(--text);background:var(--panel-2)}
.nav-item{position:relative}
.nav-btn{background:none;border:none;cursor:pointer;font-family:var(--sans);
  display:inline-flex;align-items:center;gap:6px}
.chev{width:9px;height:6px;transition:transform .25s;flex:none}
.nav-item.open .chev{transform:rotate(180deg)}
.menu-bridge{position:absolute;top:100%;left:-20px;right:-20px;height:18px;display:none;z-index:89}
.nav-item.open .menu-bridge{display:block}
.dropdown{position:absolute;top:calc(100% + 14px);left:0;z-index:90;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s;
  background:rgba(13,19,22,.97);backdrop-filter:blur(18px);
  border:1px solid var(--border-2);border-radius:16px;padding:26px;
  box-shadow:0 30px 80px rgba(0,0,0,.55)}
.dropdown.right{left:auto;right:0}
.nav-item.open .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;border-radius:10px;transition:.2s}
.dropdown strong{display:block;font-size:14px;font-weight:600;color:var(--text)}
.dropdown small{display:block;font-size:11px;color:var(--text-3);margin-top:2px;font-family:var(--mono)}
/* mega：intro + 两组链接 */
.dropdown.mega{display:grid;grid-template-columns:230px 210px 210px;gap:30px;width:720px;max-width:calc(100vw - 48px)}
.mega-intro p{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--green);
  text-transform:uppercase;margin-bottom:12px}
.mega-intro h3{font-size:19px;line-height:1.4;margin-bottom:10px}
.mega-intro span{font-size:12.5px;color:var(--text-3)}
.mega-group>p{font-size:13px;font-weight:700;margin-bottom:2px}
.mega-group>span{font-size:11px;color:var(--text-3);font-family:var(--mono);display:block;
  padding-bottom:10px;margin-bottom:10px;border-bottom:1px solid var(--border)}
.mega-group ul{list-style:none}
.mega-group li a{padding:9px 12px;margin:0 -12px}
.mega-group li a:hover,.cards-menu a:hover,.mini a:hover{background:var(--panel-2)}
.mega-group li a:hover strong,.cards-menu a:hover strong,.mini a:hover strong{color:var(--green)}
/* 卡片网格菜单（节点网络） */
.cards-menu{display:grid;grid-template-columns:repeat(3,168px);gap:10px;width:600px;max-width:calc(100vw - 48px)}
.cards-menu a{padding:14px 16px;border:1px solid var(--border);background:var(--panel)}
.cards-menu a:hover{border-color:rgba(52,211,153,.4)}
/* 精简小菜单 */
.mini{width:240px;padding:12px}
.mini a{padding:10px 12px}
/* 语言切换 */
.nav-lang{display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.nav-lang i{font-style:normal;opacity:.35}
.nav-lang span{transition:.2s;cursor:pointer}
.nav-lang span.is-active{color:var(--green);font-weight:600}
.nav-lang span:not(.is-active):hover{color:var(--text)}
.nav-lang .off{opacity:.35;cursor:not-allowed}
/* 移动端：下拉变静态子列表 */
@media(max-width:640px){
  .nav-item{width:100%}
  .nav-btn{width:100%;justify-content:space-between}
  .dropdown,.dropdown.right{position:static;transform:none;width:100%;max-width:none;
    display:none;opacity:1;visibility:visible;margin:6px 0 10px;padding:16px;box-shadow:none}
  .dropdown.mega,.cards-menu{grid-template-columns:1fr;width:100%}
  .nav-item.open .dropdown{display:grid}
  .mini{display:block}
  .nav-item.open .mini{display:block}
  .menu-bridge{display:none!important}
}

/* ---------- 绿色底座页（infrastructure.html） ---------- */
/* 四列流水线 */
.pipeline.p4{grid-template-columns:repeat(4,1fr)}
.pipeline .step p{font-size:13.5px;color:var(--text-2);margin-bottom:16px}

/* 全宽视觉带 */
.band{position:relative;overflow:hidden}
.band img{width:100%;height:420px;object-fit:cover;display:block}
.band::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,14,16,.55),rgba(10,14,16,.18) 40%,rgba(10,14,16,.88))}
.band-overlay{position:absolute;inset:0;z-index:2;display:flex;align-items:flex-end}
.band-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;width:100%;padding:40px 0 44px}
.band-stats .bs .n{font-family:var(--mono);font-size:clamp(30px,3.2vw,44px);font-weight:700;line-height:1.1;display:block}
.band-stats .bs .n em{font-style:normal;font-size:.45em;color:var(--green);margin-left:4px}
.band-stats .bs .d{margin-top:10px;font-size:14px;color:var(--text);display:block}
.band-stats .bs .d em{display:block;font-style:normal;margin-top:4px;font-family:var(--mono);
  font-size:11px;color:rgba(233,237,238,.55);letter-spacing:.06em}

/* 图文卡 */
.img-card{padding:0;overflow:hidden}
.img-card img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block;
  border-bottom:1px solid var(--border);transition:transform .5s}
.img-card:hover img{transform:scale(1.03)}
.img-card .ic-body{padding:24px 26px 28px;display:flex;flex-direction:column;flex:1}
.img-card .ic-body p{font-size:14px;color:var(--text-2);margin-bottom:18px;flex:1}
.img-card .ic-body .tags{margin-bottom:0}

/* 模式对比表 */
.cmp-wrap{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  background:var(--panel)}
.cmp-table{width:100%;border-collapse:collapse;font-size:14px}
.cmp-table th{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--text-2);text-align:left;padding:18px 22px;border-bottom:1px solid var(--border-2);
  background:var(--panel-2)}
.cmp-table td{padding:16px 22px;border-bottom:1px solid var(--border);color:var(--text-2);vertical-align:top}
.cmp-table tr:last-child td{border-bottom:none}
.cmp-table td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.cmp-table th.hl,.cmp-table td.hl{color:var(--green);background:var(--green-dim)}
.cmp-table td.hl{font-weight:600}

@media(max-width:1024px){
  .pipeline.p4{grid-template-columns:repeat(2,1fr)}
  .band img{height:340px}
}
@media(max-width:768px){
  .band-stats{grid-template-columns:1fr;gap:18px;padding:28px 0 32px}
  .band img{height:auto;min-height:420px}
  .cmp-wrap{overflow-x:auto}
  .cmp-table{min-width:640px}
}
@media(max-width:640px){
  .pipeline.p4{grid-template-columns:1fr}
}

/* ---------- 公司页（company.html） ---------- */
/* 关于我们：左题右文 */
.about-wrap{display:grid;grid-template-columns:300px 1fr;gap:60px;
  border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);padding:56px}
.about-side .h2{margin:14px 0 22px}
.about-side .demo{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--green);border:1px dashed rgba(52,211,153,.45);border-radius:999px;padding:5px 14px}
.about-text p{font-size:16.5px;line-height:1.95;color:var(--text-2);margin-bottom:22px}
.about-text p:last-child{margin-bottom:0;color:var(--text)}

/* 生态关系图 */
.eco-wrap{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);
  padding:34px 30px;overflow-x:auto}
.eco-svg{display:block;min-width:860px;width:100%;height:auto}
.eco-link{stroke-width:1.4;opacity:.65}
.eco-link.fc{stroke:var(--cyan)}
.eco-link.fg{stroke:var(--green)}
.eco-pulse.pc{fill:var(--cyan)}
.eco-pulse.pg{fill:var(--green)}
.eco-lab{font-family:var(--mono);font-size:11.5px;letter-spacing:.12em}
.eco-lab.lc{fill:var(--cyan)}
.eco-lab.lg{fill:var(--green)}
.eco-node rect{fill:var(--panel-2);stroke:var(--border-2);stroke-width:1.2}
.eco-node.cn rect{stroke:rgba(34,211,238,.4)}
.eco-node.gn rect{stroke:rgba(52,211,153,.45)}
.eco-node .ring{fill:none;stroke:var(--green);stroke-width:1.6;stroke-dasharray:4 6;opacity:.85}
.eco-node .dot{fill:var(--green-dim);stroke:var(--green);stroke-width:1.4}
.eco-t{fill:var(--text);font-size:16px;font-weight:600}
.eco-t.core-t{fill:var(--green);font-family:var(--mono);font-size:19px;font-weight:700}
.eco-e{fill:rgba(233,237,238,.55);font-family:var(--mono);font-size:10.5px;letter-spacing:.1em}

@media(max-width:900px){
  .about-wrap{grid-template-columns:1fr;gap:26px;padding:34px 26px}
}

/* ---------- 生态关系图 · 科技风升级 ---------- */
.eco-link{stroke-dasharray:2 8;animation:ecoflow 1.1s linear infinite;opacity:.75}
@keyframes ecoflow{to{stroke-dashoffset:-10}}
.eco-node .bk{fill:none;stroke-width:1.6}
.eco-node.cn .bk{stroke:var(--cyan)}
.eco-node.gn .bk{stroke:var(--green)}
.eco-node .icon{fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.eco-node.cn .icon{stroke:var(--cyan)}
.eco-node.gn .icon{stroke:var(--green)}
.eco-spin{transform-origin:600px 224px;animation:ecospin 32s linear infinite}
@keyframes ecospin{to{transform:rotate(360deg)}}
.eco-node .chip{fill:#0c1416;stroke:var(--green);stroke-width:1.6}
.eco-node .chip-in{fill:none;stroke:rgba(52,211,153,.4);stroke-width:1;stroke-dasharray:3 4}
.eco-node .pin{fill:var(--green);opacity:.65}
.eco-node .ob{fill:var(--green)}
.eco-node .ob2{fill:var(--cyan)}
@media (prefers-reduced-motion: reduce){
  .eco-link,.eco-spin{animation:none}
}

/* ---------- 生态关系图 · 算力背景 ---------- */
.eco-wrap{position:relative;background:none;border-color:var(--border-2)}
.eco-wrap::before{content:"";position:absolute;inset:0;border-radius:inherit;
  background:url('../img/eco-bg.jpg') center/cover no-repeat}
.eco-wrap::after{content:"";position:absolute;inset:0;border-radius:inherit;
  background:linear-gradient(180deg,rgba(10,14,16,.72),rgba(10,14,16,.6))}
.eco-svg{position:relative;z-index:1}