/* ==========================================================================
   Vehuan 蔚寰跨境自动化系统 · 招商官网 统一样式
   深色科技高级感 · 面向百度SEO · 国内B端审美
   ========================================================================== */
:root{
  --bg:#0a1220;
  --bg-2:#0f172a;
  --panel:rgba(15,23,42,.72);
  --line:rgba(34,211,238,.16);
  --primary:#22d3ee;
  --primary-2:#0ea5e9;
  --ink:#e2e8f0;
  --ink-dim:#94a3b8;
  --ink-soft:#64748b;
  --grad:linear-gradient(135deg,#0ea5e9,#22d3ee);
  --radius:18px;
  --shadow:0 20px 60px rgba(2,6,23,.55);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-weight:700;line-height:1.3;color:#fff}

/* ---------- 背景科技网格+光晕 ---------- */
.bg-grid{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1200px 600px at 70% -10%,rgba(14,165,233,.18),transparent 60%),
    radial-gradient(900px 500px at 10% 110%,rgba(34,211,238,.12),transparent 60%),
    linear-gradient(rgba(34,211,238,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,211,238,.05) 1px,transparent 1px);
  background-size:auto,auto,46px 46px,46px 46px;
  mask-image:linear-gradient(180deg,#000 30%,transparent 90%);
}

/* ---------- 顶部导航 ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(14px);
  background:rgba(10,18,32,.82);
  border-bottom:1px solid var(--line);
}
.nav .container{display:flex;align-items:center;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.5px}
.logo .mark{
  width:38px;height:38px;border-radius:10px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#06121f;font-size:18px;font-weight:900;
  box-shadow:0 6px 20px rgba(14,165,233,.45);
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{display:inline-flex;align-items:center;padding:8px 14px;border-radius:9px;font-size:15px;line-height:1;color:var(--ink-dim);transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(34,211,238,.12)}
.nav-cta{
  margin-left:6px;padding:9px 18px;border-radius:9px;background:var(--grad);color:#06121f;
  font-weight:700;font-size:14px;box-shadow:0 6px 18px rgba(14,165,233,.4);transition:.2s;white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(14,165,233,.55)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:#fff;border-radius:8px;padding:8px 12px;font-size:18px;cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:12px;
  font-weight:700;font-size:15px;cursor:pointer;transition:.25s;border:none;
}
.btn-primary{background:var(--grad);color:#06121f;box-shadow:0 10px 28px rgba(14,165,233,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(14,165,233,.55)}
.btn-ghost{background:transparent;color:var(--primary);border:1px solid var(--line)}
.btn-ghost:hover{background:rgba(34,211,238,.1);transform:translateY(-3px)}

/* ---------- 首屏 Hero ---------- */
.hero{
  position:relative;padding:110px 0 96px;text-align:center;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;left:50%;top:-40%;transform:translateX(-50%);
  width:1200px;height:900px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,165,233,.28),transparent 60%);
  z-index:-1;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:999px;
  border:1px solid var(--line);background:rgba(34,211,238,.08);color:var(--primary);font-size:13px;margin-bottom:26px;
}
.hero h1{font-size:52px;line-height:1.2;margin-bottom:22px;letter-spacing:1px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:19px;color:var(--ink-dim);max-width:780px;margin:0 auto 34px}
.hero .btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-stats{
  display:flex;gap:40px;justify-content:center;margin-top:64px;flex-wrap:wrap;
}
.hero-stats .stat b{font-size:34px;color:#fff;display:block}
.hero-stats .stat span{color:var(--ink-soft);font-size:14px}
.hero-img{
  margin:64px auto 0;max-width:980px;border-radius:22px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.hero-img img{width:100%;height:auto;object-fit:cover}

/* ---------- 区块 ---------- */
.section{padding:88px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.sec-head .kicker{color:var(--primary);font-size:13px;letter-spacing:3px;margin-bottom:12px}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{color:var(--ink-dim);font-size:16px}
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---------- 卡片 ---------- */
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;backdrop-filter:blur(8px);transition:.3s;position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.5);box-shadow:var(--shadow)}
.card .ic{
  width:52px;height:52px;border-radius:14px;background:rgba(34,211,238,.12);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;
}
.card h3{font-size:20px;margin-bottom:12px}
.card p{color:var(--ink-dim);font-size:15px}
.card .img{margin:-30px -30px 22px}
.card .img img{width:100%;height:190px;object-fit:cover}

/* ---------- 步骤 ---------- */
.steps{display:flex;gap:20px;flex-wrap:wrap;justify-content:center}
.step{
  flex:1;min-width:170px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px;
  position:relative;
}
.step .n{
  width:40px;height:40px;border-radius:50%;background:var(--grad);color:#06121f;font-weight:800;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.step b{display:block;margin-bottom:8px;color:#fff}
.step span{color:var(--ink-dim);font-size:14px}

/* ---------- FAQ ---------- */
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;margin-bottom:16px;overflow:hidden;
}
.faq-item summary{
  padding:20px 26px;font-weight:600;color:#fff;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--primary)}
.faq-item[open] summary::after{content:"−"}
.faq-item .a{padding:0 26px 22px;color:var(--ink-dim)}

/* ---------- 内页 Hero ---------- */
.page-hero{padding:84px 0 30px;text-align:center;position:relative}
.page-hero h1{font-size:40px;margin-bottom:14px}
.page-hero p{color:var(--ink-dim);max-width:720px;margin:0 auto;font-size:17px}

/* ---------- 文章 ---------- */
.article{padding:40px 0 90px}
.article .box{
  background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:46px;max-width:860px;margin:0 auto;
}
.article .box h2{font-size:26px;margin:34px 0 14px;color:#fff}
.article .box h3{font-size:20px;margin:26px 0 12px}
.article .box p{color:var(--ink-dim);margin-bottom:16px}
.article .box li{margin-bottom:10px;color:var(--ink-dim)}
.article .meta{color:var(--ink-soft);font-size:13px;margin-bottom:20px}
.article .box ul,.article .box ol{padding-left:22px;margin-bottom:16px}

/* ---------- 表单 ---------- */
.lead-form{
  background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:38px;max-width:680px;margin:0 auto;
  backdrop-filter:blur(8px);
}
.lead-form h3{text-align:center;margin-bottom:24px}
.lead-form .field{margin-bottom:18px}
.lead-form label{display:block;font-size:13px;color:var(--ink-dim);margin-bottom:8px}
.lead-form input,.lead-form select,.lead-form textarea{
  width:100%;padding:13px 16px;border-radius:10px;border:1px solid var(--line);
  background:rgba(2,6,23,.5);color:#fff;font-size:15px;outline:none;transition:.2s;font-family:inherit;
}
.lead-form input:focus,.lead-form select:focus,.lead-form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.lead-form textarea{resize:vertical;min-height:110px}
.lead-form select{appearance:none}
.lead-form .btn{width:100%;justify-content:center;margin-top:6px}
.form-ok{
  display:none;text-align:center;padding:40px 0;color:var(--primary);font-size:16px;
}
.form-ok b{font-size:22px;color:#fff;display:block;margin-bottom:10px}
.lead-ok{
  position:fixed;inset:0;z-index:300;display:none;align-items:center;justify-content:center;
  background:rgba(2,6,23,.68);backdrop-filter:blur(6px);
}
.lead-ok.show{display:flex}
.lead-ok .box{
  background:var(--panel);border:1px solid var(--primary);border-radius:20px;padding:34px 40px;
  max-width:440px;width:88%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.5);
  animation:leadPop .3s ease;
}
@keyframes leadPop{from{transform:scale(.92);opacity:0}to{transform:scale(1);opacity:1}}
.lead-ok .box b{display:block;font-size:22px;color:#fff;margin-bottom:12px}
.lead-ok .box p{color:var(--ink-dim);font-size:15px;line-height:1.7;margin-bottom:24px}
.lead-ok .box button{background:var(--grad);border:none;color:#fff;padding:11px 30px;border-radius:10px;cursor:pointer;font-size:15px}

/* ---------- 智能客服浮窗 ---------- */
.chat-fab{
  position:fixed;right:26px;bottom:26px;z-index:200;
  width:58px;height:58px;border-radius:50%;background:var(--grad);border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:26px;color:#06121f;
  box-shadow:0 12px 30px rgba(14,165,233,.5);transition:.25s;
}
.chat-fab:hover{transform:scale(1.08)}
.chat-fab::after{
  content:"";position:absolute;inset:0;border-radius:50%;border:2px solid rgba(34,211,238,.5);animation:pulse 2s infinite;
}
@keyframes pulse{0%{transform:scale(1);opacity:.8}100%{transform:scale(1.5);opacity:0}}
.chat-box{
  position:fixed;right:26px;bottom:96px;z-index:200;width:360px;max-width:92vw;
  background:var(--bg-2);border:1px solid var(--line);border-radius:18px;overflow:hidden;display:none;
  box-shadow:var(--shadow);
}
.chat-box.on{display:block}
.chat-head{background:var(--grad);padding:16px 20px;color:#06121f;font-weight:700;display:flex;justify-content:space-between;align-items:center}
.chat-head button{background:none;border:none;color:#06121f;font-size:20px;cursor:pointer}
.chat-body{padding:20px;min-height:150px}
.msg{
  background:rgba(34,211,238,.1);border:1px solid var(--line);border-radius:12px;padding:12px 14px;
  color:var(--ink);font-size:14px;margin-bottom:14px;
}
.chat-actions{display:grid;gap:10px;padding:0 20px 20px}
.chat-actions a,.chat-actions button{
  display:block;text-align:center;padding:12px;border-radius:10px;font-weight:600;font-size:14px;transition:.2s;
}
.chat-actions .wework{background:var(--grad);color:#06121f;border:none;cursor:pointer}
.chat-actions .form{background:rgba(34,211,238,.1);color:var(--primary);border:1px solid var(--line);cursor:pointer}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);background:var(--bg-2);padding:64px 0 30px}
.footer .grid{grid-template-columns:2fr 1fr 1fr 1.4fr}
.footer h4{font-size:16px;margin-bottom:18px;color:#fff}
.footer a{color:var(--ink-dim);font-size:14px;display:block;margin-bottom:12px;transition:.2s}
.footer a:hover{color:var(--primary)}
.footer .desc{color:var(--ink-dim);font-size:14px;margin-top:14px;max-width:300px}
.copyright{border-top:1px solid var(--line);margin-top:44px;padding-top:24px;text-align:center;color:var(--ink-soft);font-size:13px}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .nav-links{
    position:fixed;top:72px;left:0;right:0;flex-direction:column;background:var(--bg-2);
    border-bottom:1px solid var(--line);padding:16px 24px;display:none;gap:4px;
  }
  .nav-links.open{display:flex}
  .nav-cta{display:none}
  .nav-toggle{display:block}
  .hero h1{font-size:36px}
  .footer .grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:70px 0 60px}
  .hero h1{font-size:28px}
  .section{padding:60px 0}
  .sec-head h2{font-size:26px}
  .article .box{padding:26px}
  .hero-stats{gap:24px}
}

/* ==========================================================================
   动效增强：让页面更有呼吸感与科技动感
   ========================================================================== */
@keyframes flowMove{0%{background-position:0 0}100%{background-position:120px 120px}}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes glowPulse{0%,100%{opacity:.45}50%{opacity:.9}}
@keyframes breath{0%,100%{transform:scale(1);opacity:.65}50%{transform:scale(1.18);opacity:1}}
@keyframes shine{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes scanLine{0%{top:-30%}100%{top:130%}}
@keyframes tickerMove{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
@keyframes spinSlow{to{transform:rotate(360deg)}}

/* 背景网格缓慢流动 */
.bg-grid{animation:flowMove 18s linear infinite}
.bg-grid::after{
  content:"";position:fixed;inset:0;
  background:radial-gradient(circle at 30% 20%,rgba(14,165,233,.16),transparent 40%),
             radial-gradient(circle at 75% 70%,rgba(34,211,238,.14),transparent 40%);
  animation:glowPulse 7s ease-in-out infinite;
}

/* Hero 光晕呼吸 + 漂浮光点 */
.hero::before{animation:breath 6s ease-in-out infinite}
.hero .float-dot{
  position:absolute;border-radius:50%;background:var(--primary);filter:blur(1px);
  box-shadow:0 0 18px rgba(34,211,238,.8);opacity:.7;
}
.hero .float-dot.d1{width:12px;height:12px;left:12%;top:22%;animation:floatY 5s ease-in-out infinite}
.hero .float-dot.d2{width:7px;height:7px;left:82%;top:16%;animation:floatY 7s ease-in-out infinite .8s}
.hero .float-dot.d3{width:9px;height:9px;left:18%;top:62%;animation:floatY 6s ease-in-out infinite 1.4s}
.hero .float-dot.d4{width:5px;height:5px;left:88%;top:66%;animation:floatY 8s ease-in-out infinite 2s}
.hero .float-dot.d5{width:10px;height:10px;left:70%;top:40%;animation:floatY 6.5s ease-in-out infinite 1s}

/* Hero 大图漂浮 */
.hero-img{animation:floatY 6s ease-in-out infinite}

/* 动态关键词跑马灯 */
.ticker{
  margin:30px auto 0;max-width:900px;overflow:hidden;padding:14px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);
}
.ticker .track{display:flex;gap:0;width:max-content;animation:tickerMove 26s linear infinite}
.ticker span{
  display:inline-flex;align-items:center;gap:10px;color:var(--ink-dim);font-size:15px;white-space:nowrap;padding:0 26px;
}
.ticker span::after{content:"◆";color:var(--primary);font-size:9px}

/* 卡片悬停：图标浮动 + 顶部光边扫描 */
.card .ic{transition:transform .4s}
.card:hover .ic{transform:translateY(-5px) scale(1.08)}
.card::before{
  content:"";position:absolute;left:0;right:0;height:2px;top:0;opacity:0;
  background:linear-gradient(90deg,transparent,var(--primary),transparent);
  transition:opacity .3s;
}
.card:hover::before{opacity:1;animation:shine 1.6s linear infinite;background-size:200% 100%}
.card .img img{transition:transform .6s}
.card:hover .img img{transform:scale(1.05)}

/* 步骤卡片悬停上浮已有，补充数字发光 */
.step:hover .n{box-shadow:0 0 22px rgba(34,211,238,.7)}

/* 滚动进入动画 */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .8s cubic-bezier(.2,.6,.2,1),transform .8s cubic-bezier(.2,.6,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal-delay-1{transition-delay:.12s}
.reveal-delay-2{transition-delay:.24s}
.reveal-delay-3{transition-delay:.36s}

/* 数字滚动高亮 */
.hero-stats .stat b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* 按钮流光 */
.btn-primary{background-size:200% 100%;animation:shine 5s linear infinite}

/* FAQ 摘要箭头动画 */
.faq-item summary::after{transition:transform .3s}
.faq-item[open] summary::after{transform:rotate(180deg)}

/* ==========================================================================
   站点扩建新增组件（导航下拉 / 面包屑 / 资讯列表 / 分页 / 友情链接等）
   ========================================================================== */

/* 导航下拉菜单 */
.dropdown{position:relative;display:flex;align-items:center}
.dropdown-menu{
  position:absolute;top:calc(100% + 10px);left:50%;transform:translateX(-50%) translateY(8px);
  min-width:220px;padding:10px;background:rgba(15,23,42,.97);border:1px solid var(--line);
  border-radius:14px;box-shadow:0 24px 60px rgba(0,0,0,.5);backdrop-filter:blur(14px);
  opacity:0;visibility:hidden;transition:opacity .25s,transform .25s,visibility .25s;z-index:120;
}
.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown-menu a{display:block;padding:9px 14px;border-radius:9px;font-size:14px;color:var(--ink-dim);white-space:nowrap;transition:.2s}
.dropdown-menu a:hover{color:#fff;background:rgba(34,211,238,.12)}

/* 面包屑导航 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);margin-bottom:16px}
.breadcrumb a{color:var(--ink-dim)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.45}
.breadcrumb .cur{color:var(--primary)}

/* 文章分类标签 */
.tag{display:inline-block;padding:3px 12px;border-radius:20px;font-size:12px;color:var(--primary);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.28);margin:0 6px 6px 0}

/* 资讯列表（时间线） */
.news-list{max-width:880px;margin:0 auto}
.news-item{display:flex;align-items:center;gap:20px;padding:20px 6px;border-bottom:1px solid var(--line);transition:padding .25s,background .25s}
.news-item:hover{padding-left:16px;background:rgba(34,211,238,.03)}
.news-item .date{width:96px;flex:none;text-align:right;color:var(--ink-soft);font-size:13px;line-height:1.4}
.news-item .date b{display:block;font-size:22px;color:var(--primary);font-weight:800}
.news-item .info{flex:1}
.news-item .info .t{color:#fff;font-size:17px;display:block;margin-bottom:4px}
.news-item .info .t:hover{color:var(--primary)}
.news-item .info .d{color:var(--ink-soft);font-size:13px}
.news-item .cat{margin-left:auto;flex:none;font-size:12px;color:var(--primary);border:1px solid rgba(34,211,238,.25);padding:2px 10px;border-radius:16px;white-space:nowrap}

/* 分页 */
.pagination{display:flex;gap:10px;justify-content:center;margin-top:46px;flex-wrap:wrap}
.pagination a,.pagination .pg{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 12px;border-radius:9px;font-size:14px;color:var(--ink-dim);border:1px solid var(--line);transition:.2s}
.pagination a:hover{border-color:var(--primary);color:#fff}
.pagination .pg.cur{background:var(--grad);color:#06121f;font-weight:700;border-color:transparent}

/* 功能清单表格 */
.spec-table{width:100%;border-collapse:collapse;margin:20px 0}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:13px 16px;text-align:left;font-size:14px;color:var(--ink-dim)}
.spec-table th{background:rgba(34,211,238,.08);color:#fff;font-weight:600}
.spec-table tr:hover td{background:rgba(34,211,238,.04)}
.spec-table td:first-child{color:#fff;font-weight:500;white-space:nowrap}

/* 页脚友情链接 */
.friend-links{border-top:1px solid var(--line);margin-top:36px;padding-top:22px}
.friend-links b{display:inline-block;color:var(--ink-soft);font-size:13px;font-weight:400;margin:0 18px 8px 0}
.friend-links a{color:var(--ink-soft);font-size:13px;margin:0 16px 8px 0;display:inline-block}
.friend-links a:hover{color:var(--primary)}

/* CTA 通栏 */
.cta-band{background:var(--grad);border-radius:18px;padding:44px 40px;text-align:center;color:#06121f;position:relative;overflow:hidden}
.cta-band h2{color:#06121f;margin-bottom:10px}
.cta-band p{color:rgba(6,18,31,.75);margin-bottom:22px}
.cta-band .btn{background:#06121f;color:#fff}
.cta-band .btn:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(6,18,31,.35)}

/* 移动端：下拉菜单常显展开 */
@media(max-width:960px){
  .dropdown-menu{position:static;transform:none;opacity:1;visibility:visible;min-width:0;background:transparent;border:none;box-shadow:none;padding:2px 0 4px 12px}
  .news-item{flex-wrap:wrap;gap:8px}
  .news-item .date{width:auto;text-align:left}
  .news-item .cat{margin-left:0}
}