/* =========================================================
   闪连 · 跨境办公版  shanlianwed.com.cn
   框架：公告条 + 下拉导航 + 连接面板 Hero + 长落地页
   主题：商务靛蓝（干净、克制、可对接企业流程）
   ========================================================= */
:root{
  --brand:#1d4ed8;
  --brand-strong:#1a41a8;
  --brand-soft:#eef2ff;
  --accent:#3b82f6;
  --bg:#f6f8fc;
  --surface:#ffffff;
  --text:#101a2c;
  --muted:#5c6b84;
  --border:#e2e8f2;
  --dark:#0b1220;
  --dark-2:#16233c;
  --ok:#16a34a;
  --warn:#d97706;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 6px 24px rgba(16,32,64,.07);
  --shadow-lg:0 16px 40px rgba(16,32,64,.13);
  --max:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SFMono-Regular",Consolas,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding-left:20px}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;background:var(--brand);color:#fff;padding:10px 16px;z-index:99}
.skip-link:focus{left:0}

/* 公告条 */
.topbar{background:var(--dark);color:#c7d5ee;font-size:14px}
.topbar-inner{display:flex;align-items:center;gap:12px;min-height:40px}
.topbar b{color:#93b4ff}
.topbar-close{margin-left:auto;background:none;border:0;color:#8fa3c4;cursor:pointer;font-size:18px;line-height:1}
.topbar.is-hidden{display:none}

/* 导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}
.logo-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:grid;place-items:center;font-size:15px;font-weight:800}
.logo-img{height:34px;width:auto;flex:0 0 auto}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em}
.nav{margin-left:auto}
.nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.nav li{position:relative}
.nav a,.nav .nav-drop-btn{display:block;padding:9px 13px;border-radius:8px;font-size:15px;color:#2b3c58;background:none;border:0;font-family:inherit;cursor:pointer}
.nav a:hover,.nav .nav-drop-btn:hover,.nav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand-strong)}
.nav-drop-btn::after{content:"▾";margin-left:6px;font-size:11px;color:var(--muted)}
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:196px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-lg);padding:8px;display:none;z-index:60}
.dropdown.is-open{display:block}
.dropdown a{padding:9px 12px;font-size:14px;white-space:nowrap}
.header-cta{margin-left:8px}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--border);border-radius:8px;width:42px;height:38px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);margin:3px auto}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:8px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:.18s;font-family:inherit}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(29,78,216,.24)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);color:#dce6f8;border-color:rgba(147,180,255,.45)}
.btn-ghost:hover{background:rgba(147,180,255,.16)}
.btn-outline{background:#fff;color:var(--brand-strong);border-color:var(--border)}
.btn-outline:hover{border-color:var(--brand);background:var(--brand-soft)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(1000px 480px at 10% -12%,#1e3a8a 0%,transparent 60%),linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 100%);color:#eaf0fb;padding:66px 0 72px}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent);pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:44px;align-items:center}
.hero-copy{max-width:640px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:#93b4ff;border:1px solid rgba(147,180,255,.4);border-radius:999px;padding:4px 14px;margin-bottom:16px}
.hero h1{font-size:37px;margin-bottom:16px}
.hero p.lead{font-size:17px;color:#c2d1e8;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;border-top:1px solid rgba(255,255,255,.16);padding-top:22px;margin:0;list-style:none}
.hero-stats b{display:block;font-size:24px;color:#fff;font-family:var(--mono)}
.hero-stats span{font-size:13px;color:#9db3d4}

/* 连接面板 */
.connector-panel{background:rgba(255,255,255,.06);border:1px solid rgba(147,180,255,.3);border-radius:var(--radius);padding:22px}
.cp-head{display:flex;align-items:center;gap:10px;font-size:13px;color:#93b4ff;letter-spacing:.05em;margin-bottom:14px;font-family:var(--mono)}
.cp-dot{width:9px;height:9px;border-radius:50%;background:var(--warn);box-shadow:0 0 0 4px rgba(217,119,6,.16)}
.connector-panel.is-on .cp-dot{background:var(--ok);box-shadow:0 0 0 4px rgba(22,163,74,.18)}
.cp-list{list-style:none;padding:0;margin:0 0 14px;display:grid;gap:8px;font-size:13px;color:#c7d5ee}
.cp-list li{display:flex;justify-content:space-between;gap:10px;background:rgba(255,255,255,.06);border-radius:8px;padding:8px 12px}
.cp-list em{font-style:normal;color:#93b4ff;font-family:var(--mono)}
.cp-meters{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 14px}
.cp-meter{background:rgba(255,255,255,.06);border-radius:8px;padding:10px;text-align:center}
.cp-meter b{display:block;font-size:16px;color:#fff;font-family:var(--mono)}
.cp-meter span{font-size:12px;color:#9db3d4}
.cp-toggles{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;font-size:12px;color:#c7d5ee}
.cp-toggles span{border:1px solid rgba(255,255,255,.2);border-radius:6px;padding:4px 12px}
.connector-panel.is-on .cp-toggles span{border-color:rgba(22,163,74,.5);color:#b6f0dd}
.cp-btn{width:100%}
.cp-hint{font-size:12px;color:#8fa3c4;margin:10px 0 0;text-align:center}

/* 区块 */
.section{padding:64px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{max-width:840px;margin-bottom:28px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:26px;margin-bottom:12px}
.abstract{color:var(--muted);font-size:16px}
.h3-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:22px}
.h3-item{background:var(--brand-soft);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px}
.h3-item h3{font-size:16px;margin-bottom:6px;color:var(--brand-strong)}
.h3-item p{font-size:14px;color:var(--muted);margin:0}

/* 网格卡片 */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow);transition:.2s}
.feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.feature-no{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--brand);color:#fff;font-weight:700;font-size:14px;margin-bottom:14px}
.feature h3{font-size:17px;margin-bottom:8px}
.feature p{font-size:15px;color:var(--muted)}

/* 节点 */
.region-list{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0 0 26px}
.region-list li{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:9px 18px;font-size:14px}
.region-list b{color:var(--brand-strong);font-family:var(--mono)}
.node-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.node-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow)}
.node-card h3{font-size:15px;margin-bottom:8px;display:flex;justify-content:space-between;gap:8px}
.node-card h3 em{font-style:normal;color:var(--brand);font-family:var(--mono);font-size:13px}
.node-card p{font-size:13px;color:var(--muted);margin:0}
.load{display:block;height:5px;border-radius:99px;background:var(--brand-soft);margin-top:10px;overflow:hidden}
.load i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--accent))}

/* 速度条 */
.speed-bars{display:grid;gap:16px}
.bar-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow)}
.bar-item header{display:flex;justify-content:space-between;gap:10px;font-size:15px;margin-bottom:10px}
.bar-item header b{font-family:var(--mono);color:var(--brand-strong)}
.bar-track{height:8px;border-radius:99px;background:var(--brand-soft);overflow:hidden}
.bar-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width 1.1s ease}

/* 协议 */
.protocol{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--brand);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.protocol h3{font-size:17px;margin-bottom:6px}
.protocol span{display:inline-block;font-size:12px;font-family:var(--mono);color:var(--brand-strong);background:var(--brand-soft);border-radius:5px;padding:3px 10px;margin-bottom:12px}
.protocol p{font-size:15px;color:var(--muted)}

/* 场景 */
.scenario{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s}
.scenario:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.scenario h3{font-size:16px;margin-bottom:8px}
.scenario p{font-size:14px;color:var(--muted)}

/* 表格 */
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:620px;font-size:15px}
caption{text-align:left;padding:18px 20px 0;font-weight:700}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border)}
thead th{background:var(--brand-soft);color:var(--brand-strong);font-weight:700;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody td:first-child{font-weight:600}
.table-note{font-size:13px;color:var(--muted);margin-top:12px}

/* 步骤 */
.steps{counter-reset:step;list-style:none;padding:0;margin:0;display:grid;gap:14px}
.steps li{counter-increment:step;position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px 18px 62px}
.steps li::before{content:counter(step,decimal-leading-zero);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:8px;background:var(--brand-soft);color:var(--brand-strong);display:grid;place-items:center;font-size:13px;font-weight:700;font-family:var(--mono)}
.steps li b{display:block;margin-bottom:4px}
.steps li span{font-size:14px;color:var(--muted)}

/* 价格 */
.pricing{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;align-items:start}
.price-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:12px}
.price-card.is-featured{border-color:var(--brand);box-shadow:var(--shadow-lg)}
.price-badge{align-self:flex-start;font-size:12px;background:var(--brand);color:#fff;border-radius:6px;padding:4px 12px}
.price-card h3{font-size:17px}
.price{font-size:32px;font-weight:800;color:var(--brand-strong);font-family:var(--mono)}
.price small{font-size:14px;color:var(--muted);font-weight:500;font-family:var(--font)}
.price-card ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:14px;color:var(--muted)}
.price-card ul li::before{content:"✓";color:var(--brand);font-weight:700;margin-right:8px}
.price-card .btn{margin-top:auto}

/* FAQ */
.faq{display:grid;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 20px;font-weight:600;display:flex;align-items:flex-start;gap:12px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"＋";margin-left:auto;color:var(--brand);font-weight:700;flex:0 0 auto}
.faq-item[open] summary::after{content:"－"}
.faq-item summary h3{font-size:16px;font-weight:600;display:inline}
.faq-a{padding:16px 20px 20px;color:var(--muted);font-size:15px;border-top:1px solid var(--border)}

/* 评价 */
.testimonial{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--brand);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.testimonial .stars{color:#f0b429;font-size:14px;letter-spacing:2px;margin-bottom:8px}
.testimonial p{font-size:15px;color:#2b3c58}
.testimonial footer{margin-top:10px;font-size:13px;color:var(--muted)}
.avatar{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--brand-soft);color:var(--brand-strong);font-weight:700;margin-right:8px;font-size:14px;vertical-align:middle}

/* 背书 */
.badges{display:flex;flex-wrap:wrap;gap:12px;list-style:none;padding:0;margin:0}
.badges li{background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius-sm);padding:9px 18px;font-size:14px;color:#2b3c58}
.badges li::before{content:"✓";color:var(--brand);font-weight:700;margin-right:8px}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.news-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:10px;transition:.2s}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.news-card h3{font-size:17px}
.news-card p{font-size:14px;color:var(--muted);margin:0}
.news-card .meta{font-size:13px;color:var(--muted);margin-top:auto}
.news-card time{color:var(--brand-strong);font-family:var(--mono);font-size:13px}
.tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0 0 24px}
.tag{display:inline-block;font-size:13px;background:var(--brand-soft);color:var(--brand-strong);border:1px solid var(--border);border-radius:6px;padding:5px 13px}

/* 资讯页 */
.breadcrumb{font-size:14px;color:var(--muted);padding:18px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:#a9b8d0}
.news-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;align-items:start}
.sidebar{position:sticky;top:88px;display:grid;gap:18px}
.sidebar-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.sidebar-box h3{font-size:16px;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.hot-list{list-style:none;padding:0;margin:0;counter-reset:hot}
.hot-list li{counter-increment:hot;display:flex;gap:10px;padding:9px 0;font-size:14px;border-bottom:1px dashed var(--border)}
.hot-list li:last-child{border-bottom:none}
.hot-list li::before{content:counter(hot);color:var(--brand);font-weight:700;flex:0 0 auto;font-family:var(--mono)}

/* 平台卡 */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}
.platform-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow);transition:.2s}
.platform-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.platform-card h3{font-size:17px}
.platform-card dl{margin:0;font-size:14px;color:var(--muted)}
.platform-card dl div{display:flex;justify-content:space-between;gap:10px;padding:5px 0;border-bottom:1px dashed var(--border)}
.platform-card dl div:last-child{border-bottom:none}
.platform-card dd{margin:0;color:var(--text);font-weight:600}
.platform-card .btn{margin-top:auto;width:100%}

/* CTA */
.cta-band{background:linear-gradient(120deg,var(--dark) 0%,var(--dark-2) 100%);color:#eaf0fb;border-radius:var(--radius);padding:40px;display:flex;flex-wrap:wrap;align-items:center;gap:20px;justify-content:space-between}
.cta-band h2{font-size:23px;margin-bottom:8px}
.cta-band p{color:#c2d1e8;font-size:15px;margin:0}

/* 页脚 */
.site-footer{background:var(--dark);color:#9db3d4;padding:48px 0 26px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}
.site-footer h3{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.site-footer a:hover{color:#93b4ff}
.footer-bottom{margin-top:32px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:#8fa3c4}

/* 动效 */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.js .reveal.is-visible{opacity:1;transform:none}

/* 响应式 */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr}
  .news-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .hero h1{font-size:28px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .nav-toggle{display:block}
  .nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);display:none;padding:10px 0}
  .nav.is-open{display:block}
  .nav ul{flex-direction:column;padding:0 20px}
  .dropdown{position:static;border:0;box-shadow:none;padding:0 0 0 14px;display:none}
  .dropdown.is-open{display:block}
  .header-cta{display:none}
  .section{padding:48px 0}
  .cta-band{padding:28px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .cp-meters{grid-template-columns:1fr 1fr}
}