:root{--navy:#06172b;--navy2:#0a3153;--blue:#0b69a3;--cyan:#21c5ef;--ink:#081525;--muted:#64748b;--line:#dbe8f3;--soft:#f4f9ff;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:#fff;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(11,105,163,.1);box-shadow:0 8px 30px rgba(2,32,60,.05)}.nav{height:74px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;min-width:240px}.brand img{width:54px;height:42px;object-fit:contain;border:1px solid #d9edf9;border-radius:14px;padding:5px;background:#fff}.brand b{display:block;font-size:17px}.brand small{display:block;color:#0b78b8;font-size:11px}.navlinks{display:flex;align-items:center;gap:20px;margin-left:auto;font-size:14px;font-weight:600;color:#475569}.navlinks a:hover{color:#0284c7}.navcta{padding:10px 18px;border-radius:999px;color:#fff!important;background:linear-gradient(135deg,#075a90,#12a9de);box-shadow:0 10px 24px rgba(2,132,199,.2)}
.hero{background:radial-gradient(circle at 85% 15%,rgba(34,211,238,.18),transparent 24%),linear-gradient(135deg,#06172b 0%,#09345a 54%,#0d6f9e 100%);color:#fff;padding:92px 0 76px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;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:34px 34px}.hero .container{position:relative}.kicker{font-size:12px;letter-spacing:.22em;font-weight:800;color:#0ea5e9;text-transform:uppercase}.hero .kicker{color:#67e8f9}.hero h1{font-size:clamp(40px,6vw,68px);line-height:1.08;margin:12px 0 22px;letter-spacing:-.04em}.hero p{max-width:820px;color:#dbeafe;font-size:18px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:13px;font-weight:800;border:1px solid transparent;transition:.25s}.btn-primary{background:linear-gradient(135deg,#075a90,#18b7e7);color:#fff;box-shadow:0 14px 30px rgba(2,132,199,.22)}.btn-light{background:#fff;color:#075985}.btn-outline{border-color:#bfdbfe;background:#eff8ff;color:#075985}.btn:hover{transform:translateY(-2px)}
.breadcrumb{font-size:13px;color:#64748b;padding:22px 0}.breadcrumb a{color:#0284c7}.section{padding:72px 0}.section.soft{background:linear-gradient(180deg,#f4f9ff,#fff)}.section.dark{background:linear-gradient(135deg,#06172b,#0b3a61);color:#fff}.section h2{font-size:clamp(30px,4vw,42px);line-height:1.2;margin:9px 0 16px}.lead{color:#64748b;font-size:17px;max-width:880px}.dark .lead{color:#cbd5e1}
.grid{display:grid;gap:22px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:#fff;border:1px solid #dfeaf3;border-radius:20px;padding:25px;box-shadow:0 18px 48px rgba(2,32,60,.07)}.card h3{margin:8px 0;font-size:21px}.card p{color:#64748b;margin:8px 0}.dark .card{background:rgba(255,255,255,.07);border-color:rgba(125,211,252,.16);box-shadow:none}.dark .card p{color:#cbd5e1}.tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:#e8f6ff;color:#075985;font-size:12px;font-weight:800;border:1px solid #cdeaff}.op-logo{width:82px;height:60px;object-fit:contain;border-radius:16px;background:#fff;padding:8px;border:1px solid #dbeafe}.facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px}.fact{padding:18px;border-radius:17px;background:#f6fbff;border:1px solid #dbeaf3}.fact b{display:block;font-size:19px;color:#0b5f99}.fact span{font-size:13px;color:#64748b}
.callout{border-radius:22px;padding:28px;background:linear-gradient(135deg,#07192d,#0c5f8d);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:22px}.callout p{color:#dbeafe;margin:4px 0}.faq details{background:#fff;border:1px solid #dfeaf3;border-radius:16px;padding:19px 21px;margin:12px 0}.faq summary{font-weight:800;cursor:pointer}.faq p{color:#64748b;margin:12px 0 0}.table-wrap{overflow:auto;border:1px solid #dfeaf3;border-radius:18px;background:#fff}.data-table{width:100%;border-collapse:collapse;min-width:720px}.data-table th,.data-table td{padding:15px 16px;text-align:left;border-bottom:1px solid #e8eef5}.data-table th{background:#f3f8fd;color:#334155;font-size:13px}.data-table td{color:#475569}.note{padding:16px 18px;border-left:4px solid #0ea5e9;background:#eff9ff;border-radius:0 13px 13px 0;color:#475569}.toc{border:1px solid #dfeaf3;border-radius:18px;padding:22px;background:#f8fbff}.toc b{display:block;margin-bottom:10px}.toc a{display:block;color:#075985;padding:4px 0}.article h2{font-size:30px;margin-top:42px}.article h3{font-size:22px;margin-top:28px}.article p,.article li{color:#475569}.article li{margin:7px 0}.article-meta{color:#64748b;font-size:13px;margin-top:10px}.related a{display:block;padding:14px 16px;border-radius:13px;background:#f5f9fd;border:1px solid #e1ecf4;margin:9px 0;color:#075985;font-weight:700}
.footer{background:#050e1b;color:#fff;padding:56px 0 24px;position:relative;overflow:hidden}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:34px}.footer p,.footer li,.footer a{color:#94a3b8}.footer ul{list-style:none;padding:0}.footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:12px;color:#94a3b8}.tech-line{position:absolute;height:1px;width:120%;left:-10%;background:linear-gradient(90deg,transparent,#0ea5e9,#67e8f9,#0ea5e9,transparent);opacity:.45;animation:flow 9s linear infinite}.tech-line.t1{bottom:18px}.tech-line.t2{bottom:42px;animation-duration:12s;animation-direction:reverse;opacity:.25}@keyframes flow{0%{transform:translateX(-8%)}50%{transform:translateX(8%)}100%{transform:translateX(-8%)}}
.city-links,.operator-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.pill{padding:8px 13px;border-radius:999px;border:1px solid #dbeaf3;background:#fff;color:#075985;font-size:13px;font-weight:700}.case-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.case-card{overflow:hidden;border-radius:18px;background:#fff;border:1px solid #dfeaf3;box-shadow:0 14px 38px rgba(2,32,60,.07)}.case-card img{aspect-ratio:1/1;object-fit:cover}.case-card .body{padding:16px}.case-card .body b{display:block;font-size:16px}.case-card .meta{color:#64748b;font-size:13px;margin-top:6px}
@media(max-width:980px){.navlinks{display:none}.brand{min-width:0}.grid-4,.case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.facts{grid-template-columns:1fr 1fr}}@media(max-width:640px){.container{width:min(100% - 28px,1180px)}.hero{padding:72px 0 58px}.grid-2,.grid-3,.grid-4,.case-grid,.facts,.footer-grid{grid-template-columns:1fr}.callout{align-items:flex-start;flex-direction:column}.nav{height:66px}.brand small{display:none}.hero p{font-size:16px}.section{padding:56px 0}}