:root{
  --blue:#0c3b66;
  --deep:#08243d;
  --ink:#071b2e;
  --gold:#c69a45;
  --gold-light:#f1d69b;
  --light:#f4f7fb;
  --text:#1c2733;
  --muted:#5f7185;
  --line:#e3ebf3;
  --radius:16px;
  --shadow:0 18px 44px rgba(21,45,74,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;
  color:var(--text);
  line-height:1.75;
  background:#fff;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;line-height:1.3}
p{margin:0 0 14px}
.container{width:min(1200px,92vw);margin:auto}
.center{text-align:center}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{height:78px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:12px;min-width:200px}
.brand img{height:44px;width:auto}
.brand-text small{display:block;color:var(--muted);letter-spacing:.10em;font-size:11px;font-weight:700}
.brand-text strong{font-size:19px;color:var(--deep)}
nav{flex:1;display:flex;gap:8px;justify-content:center}
nav a{
  padding:8px 14px;border-radius:9px;
  font-size:15px;color:#27384a;font-weight:500;
  transition:.2s;
}
nav a:hover{color:var(--blue);background:#eef4fb}
nav a.active{color:#fff;background:var(--blue);font-weight:700}
.header-actions{display:flex;gap:12px;align-items:center;font-size:14px}
.header-actions .btn-ghost-small{
  border:1px solid var(--blue);color:var(--blue);
  padding:8px 16px;border-radius:999px;font-weight:700;transition:.2s;
}
.header-actions .btn-ghost-small:hover{background:var(--blue);color:#fff}
.menu-btn{
  display:none;margin-left:auto;
  background:none;border:1px solid var(--line);border-radius:8px;
  font-size:22px;color:var(--deep);padding:6px 10px;cursor:pointer;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;font-weight:700;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.22s;
}
.btn.primary{background:var(--gold);color:#17202b}
.btn.primary:hover{background:#b6893a;transform:translateY(-2px)}
.btn.solid{background:var(--blue);color:#fff}
.btn.solid:hover{background:#0e4f88;transform:translateY(-2px)}
.btn.ghost{border-color:rgba(255,255,255,.5);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.btn.line{border-color:var(--blue);color:var(--blue)}
.btn.line:hover{background:var(--blue);color:#fff}
.btn + .btn{margin-left:12px}

/* ===== Hero 首页 ===== */
.hero{
  position:relative;min-height:620px;display:flex;align-items:center;color:#fff;
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(7,27,46,.92) 0%,rgba(8,36,61,.72) 45%,rgba(12,59,102,.25) 100%);
}
.hero-grid-lines{position:absolute;inset:0;opacity:.14;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:56px 56px;
}
.hero-inner{position:relative;z-index:2;padding:90px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--gold-light);letter-spacing:.22em;font-size:14px;font-weight:700;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--gold)}
.hero h1{font-size:clamp(42px,7vw,84px);line-height:1.02;margin:16px 0 10px;letter-spacing:.01em}
.hero-subtitle{font-size:clamp(20px,3vw,28px);color:#fff;margin:0 0 16px;font-weight:500}
.hero-text{max-width:660px;color:#d9e4ef;font-size:18px}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap}
.hero-stats{
  display:flex;gap:0;margin-top:48px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.18);padding-top:26px;max-width:720px;
}
.hero-stat{flex:1;min-width:150px;padding:6px 22px;border-left:1px solid rgba(255,255,255,.16)}
.hero-stat:first-child{border-left:none;padding-left:0}
.hero-stat b{display:block;font-size:30px;color:var(--gold-light)}
.hero-stat span{color:#c9d7e4;font-size:13px}

/* ===== 页面hero（内页） ===== */
.page-hero{
  position:relative;color:#fff;padding:92px 0 76px;overflow:hidden;
  background:linear-gradient(120deg,var(--ink),var(--blue) 70%,#0e4f88);
}
.page-hero .grid-bg{position:absolute;inset:0;opacity:.12;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:52px 52px;
}
.page-hero .container{position:relative;z-index:2}
.page-hero p{color:var(--gold-light);letter-spacing:.16em;font-weight:700;margin:0 0 8px}
.page-hero h1{font-size:clamp(32px,5vw,48px);margin:4px 0 8px}
.page-hero span{color:#d8e4ef;font-size:17px}

/* ===== 通用区块 ===== */
.section{padding:88px 0}
.muted{background:var(--light)}
.dark-section{background:var(--ink);color:#dbe6f0}
.section-head{margin-bottom:38px}
.section-head .tag{color:var(--gold);font-weight:800;letter-spacing:.14em;font-size:13px;text-transform:uppercase}
.section-head h2{font-size:clamp(28px,4vw,38px);margin:8px 0 10px;color:var(--deep)}
.section-head p{color:var(--muted);max-width:760px;margin:0}
.dark-section .section-head h2{color:#fff}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.rich-text p{color:#34475a;margin-top:0}
.text-link{color:var(--blue);font-weight:700;display:inline-flex;align-items:center;gap:6px}
.text-link::after{content:"→";transition:.2s}
.text-link:hover::after{transform:translateX(4px)}

/* ===== 卡片 ===== */
.card-grid,.brand-grid,.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.solution-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow);transition:.25s;border-top:3px solid transparent;
}
.card:hover{transform:translateY(-6px);border-top-color:var(--gold);box-shadow:0 24px 52px rgba(21,45,74,.12)}
.muted .card{background:#fff}
.card .card-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--blue),#1d6aa5);color:#fff;display:grid;place-items:center;margin-bottom:18px}
.card h3{margin:0 0 12px;color:var(--blue);font-size:19px}
.card p{color:#53687b;margin:0;font-size:15px}
.card strong{color:var(--deep);display:block;margin-bottom:8px;font-size:14px;color:var(--gold)}

/* ===== 图片卡片（产品/行业） ===== */
.media-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.25s;
}
.media-card:hover{transform:translateY(-6px);box-shadow:0 24px 52px rgba(21,45,74,.14)}
.media-card .mc-img{height:235px;overflow:hidden;background:linear-gradient(160deg,#ffffff,#f2f6fb);display:flex;align-items:center;justify-content:center;padding:22px}
.media-card .mc-img img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain;transition:.5s;filter:drop-shadow(0 8px 18px rgba(21,45,74,.14))}
.media-card:hover .mc-img img{transform:scale(1.04)}
.media-card .mc-body{padding:24px 26px 28px}
.media-card h3{margin:0 0 10px;color:var(--blue);font-size:19px}
.media-card p{color:#53687b;margin:0;font-size:15px}
.media-card .mc-tag{display:inline-block;color:var(--gold);font-weight:800;font-size:12px;letter-spacing:.08em;margin-bottom:10px}

/* ===== 横幅 ===== */
.banner-row{display:grid;grid-template-columns:1fr 1fr;background:var(--deep);color:#fff}
.banner-row article{padding:44px 7vw;border-left:1px solid rgba(255,255,255,.1)}
.banner-row article:first-child{border-left:none}
.banner-row h2{margin:0 0 10px;font-size:22px;color:#fff}
.banner-row p{color:#e8eef6;margin:0 0 10px}
.banner-row small{color:#bcd0e2;font-size:14px}

/* ===== 品牌合作 ===== */
.logo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.logo-item{
  border:1px solid var(--line);border-radius:var(--radius);padding:30px 20px;
  text-align:center;background:#fff;display:flex;flex-direction:column;align-items:center;gap:8px;transition:.2s;
}
.logo-item:hover{border-color:var(--gold);box-shadow:var(--shadow)}
.logo-item .li-brand{font-weight:800;color:var(--deep);font-size:18px}
.logo-item .li-sub{color:var(--muted);font-size:13px}

/* ===== CTA ===== */
.cta{background:linear-gradient(120deg,var(--blue),var(--ink));color:#fff}
.cta-inner{padding:70px 0;text-align:center}
.cta h2{font-size:clamp(28px,4vw,38px);margin:0 0 10px;color:#fff}
.cta p{color:#cddaea;margin:0 0 26px}

/* ===== 关于页 ===== */
.culture-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.culture-grid article,.contact-card,.contact-form{border:1px solid var(--line);border-radius:20px;padding:34px;background:#fff}
.culture-grid h2{color:var(--deep);margin-bottom:14px;font-size:22px}
.culture-grid p{color:#34475a}
.culture-list{list-style:none;padding:0;margin:0}
.culture-list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:flex-start}
.culture-list li:last-child{border-bottom:none}
.culture-list .dot{width:8px;height:8px;border-radius:50%;background:var(--gold);margin-top:10px;flex-shrink:0}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.feature-list span{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;color:var(--blue);font-weight:700;display:flex;align-items:center;gap:10px}
.feature-list span::before{content:"";width:18px;height:18px;border-radius:6px;background:var(--gold);flex-shrink:0;background-image:radial-gradient(circle at center,#fff 1.5px,transparent 2px)}

/* ===== 资料下载 ===== */
.download-intro{padding:26px 30px;background:var(--light);border-radius:18px;margin-bottom:36px;border-left:4px solid var(--gold)}
.download-group{margin-bottom:44px}
.download-group h2{color:var(--blue);font-size:24px;margin-bottom:18px;padding-left:16px;border-left:4px solid var(--gold)}
.download-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.download-item{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 22px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:.2s;
}
.download-item:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-2px)}
.download-item .di-name{font-weight:600;color:#26364a;display:flex;align-items:center;gap:12px;word-break:break-all}
.download-item .di-ico{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#e0492f,#c0392b);color:#fff;display:grid;place-items:center;flex-shrink:0;font-size:12px;font-weight:800}
.download-item em{font-style:normal;color:var(--gold);font-weight:700;white-space:nowrap;display:flex;align-items:center;gap:6px}
.download-item em::after{content:"↓"}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:start}
.contact-card h2{color:var(--deep);margin-bottom:14px}
.contact-card p{color:#34475a}
.contact-card .ci-line{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);align-items:center}
.contact-card .ci-line:last-of-type{border-bottom:none}
.contact-card .ci-ico{width:44px;height:44px;border-radius:12px;background:var(--light);color:var(--blue);display:grid;place-items:center;flex-shrink:0}
.contact-card .ci-ico svg{width:22px;height:22px}
.contact-card b{display:block;color:var(--muted);font-size:13px;font-weight:600}
.contact-card strong{color:var(--deep);font-size:16px}
.contact-form label{display:block;font-weight:700;margin-bottom:18px;color:var(--deep)}
.contact-form input,.contact-form textarea{
  width:100%;border:1px solid var(--line);border-radius:12px;padding:13px 16px;margin-top:9px;
  font:inherit;font-size:15px;transition:.2s;
}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(12,59,102,.12)}
.contact-form textarea{min-height:150px;resize:vertical}
.form-tip{font-size:13px;color:var(--muted);font-weight:400;margin-left:10px}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink);color:#cddaea;padding:58px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.site-footer h3,.site-footer h4{color:#fff}
.site-footer h3{font-size:20px;display:flex;align-items:center;gap:10px}
.site-footer h4{font-size:15px;margin-bottom:14px}
.site-footer a{color:#cddaea}
.site-footer a:hover{color:var(--gold-light)}
.footer-brand img{height:36px;margin-bottom:12px}
.footer-link li{list-style:none;padding:5px 0}
.footer-link{list-style:none;padding:0;margin:0}
.footer-bottom{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#9db2c6}

/* ===== 背景音乐播放器 ===== */
.music-fab{
  position:fixed;right:26px;bottom:26px;z-index:99;
  display:flex;align-items:center;gap:12px;
  background:rgba(8,36,61,.92);backdrop-filter:blur(10px);
  color:#fff;border:1px solid rgba(255,255,255,.16);
  border-radius:999px;padding:10px 18px 10px 12px;
  box-shadow:0 12px 32px rgba(7,27,46,.35);cursor:pointer;
  transition:.25s;user-select:none;
}
.music-fab:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(7,27,46,.45)}
.music-fab .mf-btn{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  background:var(--gold);color:#17202b;display:grid;place-items:center;
  transition:.3s;
}
.music-fab .mf-btn svg{width:18px;height:18px}
.music-fab.playing .mf-btn{animation:pulse 1.4s ease-in-out infinite}
.music-fab .mf-label{font-size:13px;font-weight:600;line-height:1.2}
.music-fab .mf-label small{display:block;color:var(--gold-light);font-size:11px;font-weight:400}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(198,154,69,.5)}50%{box-shadow:0 0 0 10px rgba(198,154,69,0)}}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .header-actions,nav{display:none}
  .menu-btn{display:block}
  .hero{min-height:560px}
  .banner-row,.two-col,.culture-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
  .card-grid,.brand-grid,.product-grid,.solution-grid,.logo-grid,.download-list{grid-template-columns:1fr}
  .section{padding:60px 0}
  .page-hero{padding:64px 0 52px}
  .footer-grid{gap:26px}
}
@media(max-width:960px){
  nav.mobile-open{
    display:flex;position:absolute;left:4vw;right:4vw;top:82px;
    flex-direction:column;background:#fff;padding:14px;
    border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);
  }
  nav.mobile-open a{padding:13px 14px;text-align:center}
}