/* ============================================================
   万域智瞰 · 全国门户入口
   ============================================================ */
.portal-body{background:var(--brand-3)}
.portal-body::before{display:none}

/* 顶部简单导航 */
.portal-nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 48px;transition:.35s;
}
.portal-nav.scrolled{background:rgba(7,26,36,.85);backdrop-filter:blur(14px);padding:14px 48px;border-bottom:1px solid rgba(255,255,255,.08)}
.portal-nav .logo-txt b{color:#fdfaf2}
.portal-nav .logo-txt span{color:rgba(255,255,255,.5)}
.pn-links{display:flex;align-items:center;gap:10px}
.pn-links a{
  padding:9px 20px;font-size:13.5px;letter-spacing:.08em;color:rgba(255,255,255,.75);
  border:1px solid transparent;border-radius:20px;transition:.25s;
}
.pn-links a:hover{color:#fff;border-color:rgba(255,255,255,.3)}
.pn-links a.phone{color:var(--gold-2)}

/* 首屏 */
.portal-hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  color:#fdfaf2;overflow:hidden;padding:110px 48px 70px;
}
.ph-bg{position:absolute;inset:0;z-index:0}
.ph-bg img{width:100%;height:100%;object-fit:cover;opacity:.34;animation:phZoom 20s ease-out forwards}
@keyframes phZoom{from{transform:scale(1.15)}to{transform:scale(1)}}
.ph-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 40%,transparent,rgba(7,26,36,.85)),
    linear-gradient(180deg,rgba(7,26,36,.75),rgba(7,26,36,.4) 40%,var(--brand-3));
}
.ph-grid{
  position:absolute;inset:0;z-index:1;
  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:72px 72px;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 45%,#000,transparent);
}
.portal-hero .wrap{position:relative;z-index:2;text-align:center;max-width:1100px;margin:0 auto;width:100%}
.ph-badge{
  display:inline-flex;align-items:center;gap:10px;padding:8px 22px;
  border:1px solid rgba(212,180,119,.4);border-radius:20px;
  background:rgba(212,180,119,.08);font-size:13px;letter-spacing:.2em;color:var(--gold-2);
  margin-bottom:30px;
}
.ph-badge i{width:6px;height:6px;background:var(--gold-2);transform:rotate(45deg)}
.ph-logo-mark{
  width:76px;height:76px;margin:0 auto 26px;
}
.portal-hero h1{
  font-family:var(--serif);font-size:clamp(44px,7vw,92px);font-weight:700;
  letter-spacing:.12em;line-height:1.1;
}
.portal-hero h1 .glow{
  background:linear-gradient(180deg,#fff 30%,var(--gold-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.ph-en{
  font-size:clamp(12px,1.2vw,15px);letter-spacing:.62em;color:rgba(255,255,255,.5);
  margin-top:14px;padding-left:.62em;
}
.ph-slogan{
  margin:28px auto 0;max-width:680px;font-size:clamp(15px,1.5vw,18px);
  color:rgba(255,255,255,.75);line-height:2;
}
.ph-actions{margin-top:42px;display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.ph-stats{
  margin:70px auto 0;max-width:820px;display:grid;grid-template-columns:repeat(4,1fr);gap:0;
}
.ph-stats .ps{padding:0 18px;position:relative}
.ph-stats .ps + .ps::before{content:"";position:absolute;left:0;top:15%;bottom:15%;width:1px;background:rgba(255,255,255,.15)}
.ph-stats b{font-family:var(--num);font-size:clamp(28px,3vw,40px);color:var(--gold-2);display:block;line-height:1.2}
.ph-stats span{font-size:12.5px;color:rgba(255,255,255,.55);letter-spacing:.12em}

/* 城市选择 */
.city-pick{padding:110px 48px;position:relative;
  background:
    radial-gradient(ellipse 60% 40% at 20% 0%,rgba(47,143,125,.1),transparent 60%),
    radial-gradient(ellipse 60% 40% at 85% 10%,rgba(31,127,168,.12),transparent 60%),
    var(--brand-3);
}
.city-pick .wrap{max-width:1240px}
.pick-head{text-align:center;margin-bottom:56px}
.pick-head .eyebrow{justify-content:center}
.pick-head .eyebrow::before{display:none}
.pick-head h2{
  font-family:var(--serif);font-size:clamp(28px,3.6vw,44px);color:#fdfaf2;margin:16px 0 14px;
}
.pick-head p{color:rgba(255,255,255,.55);font-size:15.5px}

.pick-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.pick-card{
  position:relative;border-radius:12px;overflow:hidden;min-height:560px;
  display:flex;flex-direction:column;justify-content:flex-end;
  border:1px solid rgba(255,255,255,.12);
  transition:transform .45s,box-shadow .45s;
}
.pick-card:hover{transform:translateY(-8px);box-shadow:0 30px 80px -20px rgba(0,0,0,.6)}
.pick-card .pc-bg{position:absolute;inset:0;z-index:0}
.pick-card .pc-bg img{width:100%;height:100%;object-fit:cover;transition:transform .8s}
.pick-card:hover .pc-bg img{transform:scale(1.06)}
.pick-card .pc-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,26,36,.15) 30%,rgba(7,26,36,.92));
}
.pc-corner{
  position:absolute;top:24px;left:24px;z-index:3;
  padding:7px 16px;border-radius:20px;font-size:12px;letter-spacing:.18em;
  background:rgba(255,253,248,.12);border:1px solid rgba(255,255,255,.28);
  backdrop-filter:blur(8px);color:#fff;
}
.pc-body{position:relative;z-index:2;padding:40px 38px 38px;color:#fff}
.pc-city{display:flex;align-items:baseline;gap:16px;margin-bottom:8px}
.pc-city b{font-family:var(--serif);font-size:44px;letter-spacing:.1em;font-weight:700}
.pc-city span{font-size:12px;letter-spacing:.34em;color:rgba(255,255,255,.55)}
.pc-tagline{font-size:15px;color:var(--gold-2);letter-spacing:.06em;margin-bottom:14px}
.pc-desc{font-size:13.5px;color:rgba(255,255,255,.68);line-height:1.9;margin-bottom:24px}
.pc-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:28px;padding:20px 0;border-top:1px solid rgba(255,255,255,.14);border-bottom:1px solid rgba(255,255,255,.14)}
.pc-stats b{font-family:var(--num);font-size:24px;color:var(--gold-2);display:block}
.pc-stats span{font-size:11.5px;color:rgba(255,255,255,.55)}
.pc-actions{display:flex;gap:12px}
.pc-actions .btn{flex:1;justify-content:center}

/* 能力带 */
.portal-cap{background:var(--paper);color:var(--ink);padding:100px 48px}
.portal-cap .wrap{max-width:1240px}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:50px}
.p-cap{
  background:var(--card);border:1px solid var(--line);border-radius:8px;padding:34px 30px;
  transition:.35s;position:relative;overflow:hidden;
}
.p-cap:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(185,146,79,.4)}
.p-cap .pc-ic{
  width:52px;height:52px;border-radius:6px;background:var(--brand);color:var(--gold-2);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;
}
.p-cap h3{font-family:var(--serif);font-size:19px;margin-bottom:10px}
.p-cap p{font-size:13.5px;color:var(--ink-2);line-height:1.9}
.p-cap::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:linear-gradient(90deg,var(--gold),var(--brand-2));transition:width .4s}
.p-cap:hover::after{width:100%}

.portal-models{
  margin-top:54px;padding:36px 40px;border-radius:8px;
  background:var(--brand-3);color:#fff;text-align:center;
}
.portal-models h4{font-family:var(--serif);font-size:19px;color:#fdfaf2;margin-bottom:8px}
.portal-models p{font-size:13px;color:rgba(255,255,255,.55);margin-bottom:22px}
.portal-models .ai-platforms{justify-content:center;margin-top:0}
.portal-models .ai-platforms span{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.15);color:rgba(255,255,255,.8)}

/* 门户页脚 */
.portal-footer{
  background:#061923;color:rgba(255,255,255,.5);padding:36px 48px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.08);font-size:12.5px;
}
.portal-footer a:hover{color:var(--gold-2)}
.portal-footer .pf-links{display:flex;gap:24px;flex-wrap:wrap}

/* 响应式 */
@media(max-width:900px){
  .portal-nav,.portal-nav.scrolled{padding:16px 20px}
  .pn-links a:not(.phone){display:none}
  .pick-grid{grid-template-columns:1fr}
  .pick-card{min-height:480px}
  .cap-grid{grid-template-columns:1fr}
  .ph-stats{grid-template-columns:repeat(2,1fr);gap:30px 0}
  .ph-stats .ps:nth-child(3)::before{display:none}
  .city-pick,.portal-cap{padding:70px 20px}
  .portal-hero{padding:110px 20px 60px}
}