:root {
  --navy-900:#0A2148; --navy-800:#0F2A5C; --navy-700:#13366E;
  --blue-600:#1450A8; --blue-500:#1B62C4; --blue-100:#EAF1FB;
  --gold-500:#C8A24C; --gold-300:#E4C98C;
  --ink:#1F2430; --gray:#5A6472; --gray-2:#98A2B3; --line:#E6E9F0; --bg:#F5F7FA;
  --shadow-sm:0 1px 3px rgba(15,42,92,.06),0 1px 2px rgba(15,42,92,.04);
  --shadow-md:0 10px 30px rgba(15,42,92,.10);
  --shadow-lg:0 24px 60px rgba(15,42,92,.16);
  --r-lg:18px; --r-md:12px;
  --font:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:15px;overflow-x:hidden}
img{max-width:100%;border:0}
a{text-decoration:none;color:inherit;transition:color .2s}
ul{list-style:none}
.wrap{width:1200px;max-width:100%;margin:0 auto;padding:0 20px}

/* ============ 顶部工具条 ============ */
.topbar{background:var(--navy-900);color:#A9B8D4;font-size:12.5px;line-height:36px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center}
.topbar a:hover{color:#fff}
.topbar .hotline{color:var(--gold-300)}
.topbar .tb-right{display:flex;gap:18px}
.topbar .tb-right a{color:#A9B8D4}

/* ============ 页头导航 ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:0 6px 24px rgba(15,42,92,.08)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--navy-800),var(--blue-600));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:15px;letter-spacing:0;box-shadow:var(--shadow-sm)}
.brand .name{font-size:19px;font-weight:700;color:var(--navy-900);letter-spacing:.5px}
.brand .name small{display:block;font-size:12px;font-weight:400;color:var(--gray);letter-spacing:2px}
.nav{display:flex;gap:6px}
.nav a{padding:8px 16px;border-radius:8px;font-size:14.5px;color:var(--navy-800);font-weight:500}
.nav a:hover{color:var(--blue-600);background:var(--blue-100)}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#081B3F 0%,#0F2A5C 45%,#1450A8 100%);color:#fff}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(720px 360px at 82% 18%,rgba(200,162,76,.22),transparent 60%),radial-gradient(560px 300px at 12% 88%,rgba(27,98,196,.5),transparent 60%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);background-size:34px 34px;opacity:.35;pointer-events:none}
.hero-inner{position:relative;z-index:1;padding:104px 0 120px;max-width:860px}
.hero .eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border:1px solid rgba(200,162,76,.5);border-radius:999px;color:var(--gold-300);font-size:13px;letter-spacing:2px;background:rgba(200,162,76,.08);margin-bottom:26px}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;letter-spacing:1px}
.hero h1 .gold{color:var(--gold-300)}
.hero .sub{font-size:17px;color:#C7D4EC;margin:22px 0 12px;line-height:1.8;max-width:680px}
.hero .tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:38px}
.hero .tags span{font-size:12.5px;color:#D8E2F5;padding:5px 12px;border:1px solid rgba(255,255,255,.22);border-radius:999px}
.hero .ctas{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;border:0}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,var(--gold-300),var(--gold-500));color:#3B2E0E;box-shadow:0 10px 26px rgba(200,162,76,.35)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}
.hero .statline{margin-top:56px;display:flex;gap:44px;border-top:1px solid rgba(255,255,255,.14);padding-top:26px;max-width:680px}
.hero .statline .num{font-size:26px;font-weight:800;color:#fff}
.hero .statline .num b{color:var(--gold-300);font-weight:800}
.hero .statline .lab{font-size:13px;color:#A9B8D4;margin-top:2px}
.scroll-cue{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:24px;height:40px;border:2px solid rgba(255,255,255,.4);border-radius:14px;z-index:2}
.scroll-cue::after{content:"";position:absolute;left:50%;top:7px;width:4px;height:8px;margin-left:-2px;border-radius:4px;background:#fff;animation:cue 1.6s infinite}
@keyframes cue{0%{opacity:1;transform:translateY(0)}70%{opacity:0;transform:translateY(14px)}100%{opacity:0;transform:translateY(0)}}

/* ============ 通用 section ============ */
.section{padding:84px 0}
.section.alt{background:#fff}
.sec-head{text-align:center;max-width:640px;margin:0 auto 52px}
.sec-head .kicker{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--blue-600);font-weight:600;margin-bottom:12px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--navy-900);letter-spacing:.5px}
.sec-head h2 em{font-style:normal;color:var(--gold-500)}
.sec-head p{color:var(--gray);margin-top:14px;font-size:15px}

/* ============ 站群入口 ============ */
.portal-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.portal-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:40px 36px;overflow:hidden;transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}
.portal-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--gold-500),var(--blue-500));transform:scaleX(0);transform-origin:left;transition:transform .35s}
.portal-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.portal-card:hover::before{transform:scaleX(1)}
.portal-card .plogo{display:flex;align-items:center;gap:16px;margin-bottom:22px}
.portal-card .plogo img{height:42px;width:auto;object-fit:contain}
.portal-card .plogo .chip{font-size:12px;color:var(--gold-500);border:1px solid var(--gold-500);border-radius:999px;padding:2px 10px;white-space:nowrap}
.portal-card h3{font-size:22px;font-weight:700;color:var(--navy-900);margin-bottom:8px}
.portal-card .company{font-size:13px;color:var(--gray);margin-bottom:16px}
.portal-card p.desc{color:var(--gray);font-size:14.5px;line-height:1.8;margin-bottom:22px;flex:1}
.portal-card .ptags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.portal-card .ptags span{font-size:12px;color:var(--blue-600);background:var(--blue-100);padding:4px 12px;border-radius:6px}
.portal-card .go{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;color:var(--blue-600);font-weight:600;font-size:14.5px}
.portal-card .go .arrow{transition:transform .25s}
.portal-card:hover .go .arrow{transform:translateX(6px)}

/* ============ 业务领域 ============ */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.biz-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px 22px;transition:transform .28s,box-shadow .28s,border-color .28s}
.biz-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:transparent}
.biz-card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue-100),#E4EFFF);display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--blue-600)}
.biz-card h4{font-size:16px;color:var(--navy-900);margin-bottom:8px;font-weight:600}
.biz-card p{font-size:13.5px;color:var(--gray);line-height:1.7}

/* ============ 拍卖平台 ============ */
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.plat-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:28px 24px;display:flex;align-items:center;justify-content:space-between;transition:transform .28s,box-shadow .28s}
.plat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.plat-card .ptitle{font-size:16.5px;font-weight:700;color:var(--navy-900)}
.plat-card .pdesc{font-size:13px;color:var(--gray);margin-top:4px}
.plat-card .go-ic{width:38px;height:38px;border-radius:50%;background:var(--blue-100);color:var(--blue-600);display:flex;align-items:center;justify-content:center;flex-shrink:0}

/* ============ 关于公司 ============ */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center}
.about .intro h3{font-size:26px;color:var(--navy-900);font-weight:800;margin-bottom:18px}
.about .intro h3 em{font-style:normal;color:var(--gold-500)}
.about .intro p{color:var(--gray);font-size:14.5px;line-height:1.9;margin-bottom:16px}
.about .intro .creds{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.about .intro .creds span{font-size:13px;color:var(--ink);background:var(--bg);border:1px solid var(--line);padding:8px 14px;border-radius:8px}
.about .honor{border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;padding:30px}
.about .honor h4{font-size:16px;color:var(--navy-900);margin-bottom:16px;font-weight:700}
.about .honor li{display:flex;gap:10px;padding:9px 0;color:var(--gray);font-size:14px;border-bottom:1px dashed var(--line);align-items:center}
.about .honor li:last-child{border-bottom:0}
.about .honor li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold-500);flex-shrink:0}

/* ============ 联系我们 ============ */
.contact{background:linear-gradient(135deg,var(--navy-900),var(--navy-700));color:#fff;border-radius:var(--r-lg);padding:56px 60px;display:grid;grid-template-columns:repeat(3,1fr);gap:40px;position:relative;overflow:hidden}
.contact::before{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(200,162,76,.25),transparent 65%)}
.contact h4{font-size:15px;color:var(--gold-300);font-weight:600;margin-bottom:14px;letter-spacing:1px}
.contact p{font-size:14px;color:#C7D4EC;line-height:1.9}
.contact .tel{font-size:30px;font-weight:800;color:#fff}
.contact .tel b{color:var(--gold-300)}

/* ============ 页脚 ============ */
.site-footer{background:var(--navy-900);color:#8FA0C2;font-size:13px;padding:34px 0}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.site-footer a{color:#A9B8D4}
.site-footer a:hover{color:#fff}

/* ============ 滚动显现动画 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width: 992px){
  .portal-grid,.about{grid-template-columns:1fr}
  .biz-grid{grid-template-columns:repeat(2,1fr)}
  .plat-grid{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr;padding:40px 28px}
  .hero h1{font-size:34px}
  .nav{display:none}
  .hero .statline{flex-wrap:wrap;gap:24px}
}
@media (max-width: 560px){
  .biz-grid{grid-template-columns:1fr}
  .topbar .tb-right{display:none}
}