/* ============================================================
   西安未来智造-三维扫描 城市分站样式
   10 种设计变体，base 模板相同，通过 .v1~.v10 + .layout-* 切换
   ============================================================ */

*{margin:0;padding:0;box-sizing:border-box}
:root{
  --main:#06B6D4;--light:#22D3EE;--dim:rgba(6,182,212,.15);
  --bg:#0A1628;--bg2:#0F172A;--ink:#0F172A;--silver:#94A3B8;
  --line:rgba(148,163,184,.2);--mist:#F8FAFC;--radius:2px;
  --container:1200px;
  --f-cn:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,sans-serif;
  --f-en:"Sora","PingFang SC",-apple-system,sans-serif;
}
body{font-family:var(--f-cn);color:var(--ink);background:var(--mist);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}
h1,h2,h3,h4{font-weight:700;line-height:1.25}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* ========== 10 种设计变体（颜色方案） ========== */
.v1{--main:#06B6D4;--light:#22D3EE;--dim:rgba(6,182,212,.15); --bg:#0A1628;--bg2:#0F172A}
.v2{--main:#10B981;--light:#34D399;--dim:rgba(16,185,129,.15);--bg:#06281F;--bg2:#0A1F1A}
.v3{--main:#F59E0B;--light:#FBBF24;--dim:rgba(245,158,11,.15);--bg:#1F1A0A;--bg2:#1A1707}
.v4{--main:#E11D48;--light:#FB7185;--dim:rgba(225,29,72,.15); --bg:#28070F;--bg2:#1F0A0F}
.v5{--main:#7C3AED;--light:#A78BFA;--dim:rgba(124,58,237,.15);--bg:#0F0A28;--bg2:#100A1F}
.v6{--main:#4F46E5;--light:##818CF8;--dim:rgba(79,70,229,.15); --bg:#0A1028;--bg2:#0A0F1F}
.v7{--main:#0D9488;--light:#2DD4BF;--dim:rgba(13,148,136,.15);--bg:#062825;--bg2:#0A1F1D}
.v8{--main:#EA580C;--light:#FB923C;--dim:rgba(234,88,12,.15); --bg:#28160A;--bg2:#1F1207}
.v9{--main:#475569;--light:#94A3B8;--dim:rgba(71,85,105,.15); --bg:#0F172A;--bg2:#1E293B}
.v10{--main:#BE123C;--light:#F43F5E;--dim:rgba(190,18,60,.15); --bg:#280713;--bg2:#1F0710}

/* ========== 区段通用 ========== */
.section{padding:80px 0;position:relative}
@media(max-width:768px){.section{padding:56px 0}}
.sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--f-en);font-size:13px;font-weight:600;letter-spacing:.15em;color:var(--main);text-transform:uppercase;margin-bottom:14px}
.sec-tag::before{content:"";width:24px;height:1px;background:var(--main)}
.sec-title{font-size:clamp(24px,3.5vw,36px);font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.sec-title em{color:var(--main);font-style:normal}
.sec-sub{margin-top:12px;color:#64748B;font-size:15px}

/* ========== 导航 ========== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(0,0,0,.0);transition:background .3s,box-shadow .3s}
.nav.scrolled{background:rgba(0,0,0,.85);backdrop-filter:blur(14px);box-shadow:0 4px 20px rgba(0,0,0,.15)}
.nav-inner{max-width:var(--container);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:8px;color:#fff;font-weight:800;font-size:18px}
.logo-mark{display:inline-flex;align-items:baseline}
.logo-mark .r{font-size:9px;vertical-align:super;margin-left:2px;border:1px solid var(--light);color:var(--light);padding:0 3px;border-radius:2px;line-height:1.3;font-weight:700}
.logo-sep{color:rgba(255,255,255,.4);font-weight:300;margin:0 4px}
.logo-biz{font-size:15px;color:var(--light);letter-spacing:.04em}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{color:rgba(255,255,255,.78);font-size:14px;font-weight:500;transition:color .2s;position:relative}
.nav-menu a:hover{color:#fff}
.nav-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:var(--main);color:#fff!important;font-size:14px;font-weight:600;border-radius:var(--radius);transition:background .2s}
.nav-cta:hover{background:var(--light)}
@media(max-width:768px){.nav-menu{display:none}}

/* ========== Hero 通用 ========== */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;background:linear-gradient(160deg,var(--bg) 0%,var(--bg2) 100%);overflow:hidden;padding-top:80px;color:#fff}
.hero-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at 60% 50%,#000 30%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 60% 50%,#000 30%,transparent 70%);pointer-events:none}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr;gap:24px}}
.layout-centered .hero-grid{grid-template-columns:1fr;text-align:center;max-width:880px;margin:0 auto}
.layout-full .hero-grid{grid-template-columns:1fr;text-align:center;max-width:980px;margin:0 auto}
.layout-diagonal .hero-grid{grid-template-columns:1fr;max-width:1000px}
.layout-minimal .hero-grid{grid-template-columns:1fr;text-align:left;max-width:780px}
.layout-grid .hero-grid{grid-template-columns:1fr 1fr;gap:60px}
.layout-bold .hero-grid{grid-template-columns:1.3fr .7fr}
.layout-elegant .hero-grid{grid-template-columns:1fr;text-align:center;max-width:920px}
.layout-dramatic .hero-grid{grid-template-columns:1fr;text-align:center;max-width:1000px}
.layout-split-rev .hero-grid{grid-template-columns:.85fr 1.15fr;direction:rtl}
.layout-split-rev .hero-grid > *{direction:ltr}
.hero-text{color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.05);border-radius:40px;color:var(--light);font-size:12px;font-weight:600;letter-spacing:.05em;margin-bottom:24px}
.eyebrow .dot{width:6px;height:6px;background:var(--light);border-radius:50%;box-shadow:0 0 8px var(--light);animation:blink 1.6s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{color:#fff;font-size:clamp(28px,4.4vw,50px);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 em{color:var(--light);font-style:normal}
.hero h1 .line2{display:block;font-size:.55em;color:var(--silver);font-weight:500;margin-top:10px;letter-spacing:0}
.hero p.lead{color:rgba(255,255,255,.7);font-size:16px;max-width:560px;margin-bottom:32px}
.layout-centered .lead,.layout-full .lead,.layout-elegant .lead,.layout-dramatic .lead{margin-left:auto;margin-right:auto}
.layout-minimal .lead{max-width:none}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.layout-centered .actions,.layout-full .actions,.layout-elegant .actions,.layout-dramatic .actions{justify-content:center}
.layout-minimal .actions{justify-content:flex-start}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;font-size:14px;font-weight:600;border-radius:var(--radius);transition:transform .2s,box-shadow .2s,background .2s}
.btn-primary{background:linear-gradient(135deg,var(--main),var(--light));color:#06121F;box-shadow:0 8px 20px var(--dim)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px var(--dim)}
.btn-ghost{border:1px solid rgba(255,255,255,.25);color:#fff;background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--light);background:var(--dim)}
.stats{display:flex;gap:32px;flex-wrap:wrap}
.layout-centered .stats,.layout-full .stats,.layout-elegant .stats,.layout-dramatic .stats{justify-content:center}
.stats .num{font-family:var(--f-en);font-size:26px;font-weight:800;color:var(--light);line-height:1}
.stats .num span{font-size:.5em;vertical-align:super;margin-left:1px}
.stats .lbl{font-size:12px;color:var(--silver);margin-top:4px}
.hero-visual{position:relative;height:380px;pointer-events:none}
@media(max-width:980px){.hero-visual{display:none}}
.v-ring{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);border:1px solid var(--dim);border-radius:50%}
.v-ring.r1{width:360px;height:360px;animation:spin 18s linear infinite}
.v-ring.r2{width:240px;height:240px;border-style:dashed;animation:spin 12s linear infinite reverse}
.v-ring.r3{width:140px;height:140px;border:1px solid rgba(255,255,255,.2)}
@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}
.v-core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:100px;height:100px;border-radius:50%;background:radial-gradient(circle,var(--light),var(--main) 60%,transparent 80%);filter:blur(2px);opacity:.5;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.4}50%{transform:translate(-50%,-50%) scale(1.15);opacity:.75}}

/* ========== 区域定位 ========== */
.position{background:#fff}
.ind-tags{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:32px}
.ind-tags span{display:inline-block;padding:10px 18px;background:var(--dim);color:var(--ink);font-size:14px;font-weight:600;border-radius:24px;border:1px solid var(--main)}
.ind-desc{max-width:920px;margin:0 auto;text-align:center;color:#475569;font-size:15px;line-height:1.9}

/* ========== 核心服务 ========== */
.services{background:var(--mist)}
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:980px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.svc-grid{grid-template-columns:1fr}}
.svc-card{position:relative;padding:32px 24px;border:1px solid var(--line);border-radius:6px;background:#fff;transition:transform .3s,box-shadow .3s,border-color .3s;overflow:hidden}
.svc-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--main),var(--light));transform:scaleX(0);transform-origin:left;transition:transform .3s}
.svc-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(10,22,40,.08);border-color:transparent}
.svc-card:hover::before{transform:scaleX(1)}
.svc-card .n{position:absolute;top:20px;right:24px;font-family:var(--f-en);font-size:13px;color:#CBD5E1;font-weight:700}
.svc-card h3{font-size:18px;margin-bottom:10px;color:var(--ink)}
.svc-card p{color:#64748B;font-size:13px;line-height:1.75}

/* ========== 服务流程 ========== */
.process{background:#fff}
.proc-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
@media(max-width:980px){.proc-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.proc-grid{grid-template-columns:repeat(2,1fr)}}
.step{padding:20px 12px;text-align:center;border:1px solid var(--line);border-radius:6px;background:#fff;transition:.3s}
.step:hover{border-color:var(--main);background:var(--mist)}
.step .num{font-family:var(--f-en);font-size:24px;font-weight:800;color:var(--main);line-height:1;margin-bottom:8px}
.step h4{font-size:14px;margin-bottom:4px;color:var(--ink)}
.step p{font-size:11px;color:#64748B;line-height:1.55}

/* ========== FAQ ========== */
.faq{background:var(--mist)}
.faq-list{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden;transition:border-color .2s,box-shadow .2s}
.faq-item[open]{border-color:var(--main);box-shadow:0 6px 20px var(--dim)}
.faq-item summary{padding:16px 22px;cursor:pointer;font-size:15px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:12px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .q{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--dim);color:var(--main);font-family:var(--f-en);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.faq-item .a{padding:0 22px 18px 62px;color:#64748B;font-size:14px;line-height:1.85}

/* ========== CTA ========== */
.cta-bar{background:linear-gradient(135deg,var(--main),var(--light));padding:36px 0;text-align:center;color:#fff}
.cta-bar h2{font-size:clamp(20px,2.8vw,28px);margin-bottom:8px;color:#fff}
.cta-bar p{font-size:14px;opacity:.9;margin-bottom:18px}
.cta-bar .btn{background:#06121F;color:#fff}
.cta-bar .btn:hover{background:#0F172A}

/* ========== 底部 ========== */
.footer{background:#070E1A;color:rgba(255,255,255,.6);padding:48px 0 0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:32px;border-bottom:1px solid rgba(148,163,184,.12)}
@media(max-width:768px){.footer-top{grid-template-columns:1fr;gap:24px}}
.footer-brand p{font-size:13px;line-height:1.8;max-width:360px;margin-top:14px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:600}
.footer-col ul{display:flex;flex-direction:column;gap:8px}
.footer-col ul a{font-size:13px;transition:color .2s}
.footer-col ul a:hover{color:var(--light)}
.footer-col .link-list a{color:rgba(255,255,255,.6)}
.city-links{background:#050A12;padding:24px 0}
.city-links h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:600}
.city-links-inner{display:flex;flex-wrap:wrap;gap:8px 12px}
.city-links-inner a{display:inline-block;padding:5px 10px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:2px;font-size:12px;color:rgba(255,255,255,.7);transition:.2s}
.city-links-inner a:hover{background:var(--dim);color:var(--light);border-color:var(--main)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:18px 0;font-size:12px}
.footer-bottom a{color:var(--light);transition:color .2s}
.footer-bottom a:hover{color:#fff}
.footer-bottom .tech-support a{font-weight:600}
.footer-bottom .links{display:flex;gap:14px;flex-wrap:wrap}
@media(max-width:640px){.footer-bottom{flex-direction:column;text-align:center}}
.sitemap-link a{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;background:var(--dim);color:var(--main);border-radius:2px;font-size:12px;font-weight:600}
.sitemap-link a:hover{background:var(--main);color:#fff}

/* ========== 滚动渐入 ========== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:translateY(0)}