/* ===== 速分享 官网公共样式 ===== */
:root{
  --primary:#3b82f6;
  --primary-dark:#2563eb;
  --primary-soft:#eff6ff;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e5e9f0;
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --radius:14px;
  --shadow:0 8px 30px rgba(15,23,42,.06);
  --maxw:1120px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);line-height:1.7;background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary-dark);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ===== 顶部导航 ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;color:var(--ink);}
.logo:hover{text-decoration:none;}
.logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,#4A90D9,#67C2D9);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{color:var(--ink-2);font-size:15px;}
.nav-links a:hover{color:var(--primary);text-decoration:none;}
.nav-links a.active{color:var(--primary);font-weight:600;}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink);}

/* ===== 按钮 ===== */
.btn{display:inline-block;padding:13px 28px;border-radius:10px;font-size:15px;font-weight:600;transition:.18s;cursor:pointer;border:1px solid transparent;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);text-decoration:none;}
.btn-secondary{border-color:var(--line);color:var(--ink-2);background:#fff;}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);text-decoration:none;}
.btn-light{background:#fff;color:var(--primary-dark);}
.btn-light:hover{text-decoration:none;opacity:.92;}

/* ===== Hero ===== */
.hero{background:linear-gradient(180deg,#f0f7ff 0%,#ffffff 100%);padding:84px 0 72px;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.hero h1{font-size:42px;line-height:1.28;font-weight:800;margin-bottom:20px;letter-spacing:.5px;}
.hero h1 span{color:var(--primary);}
.hero p.lead{font-size:17px;color:var(--muted);max-width:540px;margin-bottom:32px;}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;}
.hero-tags{display:flex;gap:18px;margin-top:26px;flex-wrap:wrap;color:var(--muted);font-size:13px;}
.hero-tags span{display:inline-flex;align-items:center;gap:6px;}
.hero-tags i{width:7px;height:7px;border-radius:50%;background:var(--primary);display:inline-block;}

/* 模拟卡片预览图（纯 CSS） */
.preview{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:22px;}
.preview-bar{display:flex;align-items:center;gap:8px;margin-bottom:18px;}
.preview-bar i{width:10px;height:10px;border-radius:50%;background:#e2e8f0;display:block;}
.preview-card{display:flex;gap:14px;border:1px solid var(--line);border-radius:12px;padding:14px;align-items:center;}
.preview-card .thumb{width:72px;height:72px;border-radius:10px;background:linear-gradient(135deg,#4A90D9,#67C2D9);flex:none;display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;text-align:center;}
.preview-card .pc-lines{flex:1;}
.preview-card .pc-lines b{display:block;height:12px;width:80%;background:#0f172a;border-radius:6px;margin-bottom:10px;}
.preview-card .pc-lines em{display:block;height:9px;width:100%;background:#e5e9f0;border-radius:6px;margin-bottom:7px;font-style:normal;}
.preview-card .pc-lines em:last-child{width:70%;}
.preview-src{display:flex;align-items:center;gap:7px;margin-top:14px;color:#94a3b8;font-size:12px;}
.preview-src .dot{width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,#4A90D9,#67C2D9);}

/* ===== 区块 ===== */
.section{padding:74px 0;}
.section-soft{background:var(--bg-soft);}
.section-head{text-align:center;max-width:720px;margin:0 auto 52px;}
.section-head h2{font-size:29px;font-weight:800;margin-bottom:14px;}
.section-head p{color:var(--muted);font-size:16px;}
.eyebrow{display:inline-block;color:var(--primary);background:var(--primary-soft);font-size:13px;font-weight:600;padding:5px 14px;border-radius:999px;margin-bottom:16px;}

.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.2s;}
.feature:hover{box-shadow:var(--shadow);transform:translateY(-3px);}
.feature .ico{width:46px;height:46px;border-radius:12px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:18px;}
.feature h3{font-size:17px;margin-bottom:9px;}
.feature p{color:var(--muted);font-size:14.5px;}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.step{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 20px;}
.step .circle{width:50px;height:50px;border-radius:50%;background:var(--primary);color:#fff;font-size:20px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;}
.step h4{font-size:16px;margin-bottom:8px;}
.step p{color:var(--muted);font-size:14px;}

/* 场景 */
.scenes{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.scene{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;}
.scene .ico{font-size:26px;flex:none;width:50px;height:50px;border-radius:12px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;}
.scene h3{font-size:16px;margin-bottom:6px;}
.scene p{color:var(--muted);font-size:14px;}

/* CTA */
.cta{background:linear-gradient(135deg,#3b82f6,#2563eb);border-radius:22px;color:#fff;text-align:center;padding:58px 28px;}
.cta h2{font-size:27px;margin-bottom:14px;}
.cta p{opacity:.92;margin-bottom:28px;font-size:16px;}

/* ===== 内页文章排版 ===== */
.page{padding:56px 0 80px;}
.page-head{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:38px;}
.page-head h1{font-size:32px;font-weight:800;margin-bottom:12px;}
.page-head .meta{color:var(--muted);font-size:14px;}
.article{max-width:820px;}
.article h2{font-size:22px;margin:38px 0 14px;font-weight:700;}
.article h3{font-size:17px;margin:24px 0 10px;}
.article p{color:var(--ink-2);margin-bottom:12px;}
.article ul{margin:0 0 14px 22px;color:var(--ink-2);}
.article li{margin-bottom:8px;}
.article table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px;}
.article th,.article td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article th{background:var(--bg-soft);}
.note{background:var(--primary-soft);border-left:4px solid var(--primary);border-radius:8px;padding:16px 20px;margin:18px 0;color:var(--ink-2);font-size:14.5px;}

/* FAQ */
.faq{border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-bottom:14px;background:#fff;}
.faq h3{font-size:16px;margin-bottom:8px;}
.faq p{color:var(--muted);font-size:14.5px;}

/* 关于页 */
.about-card{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:30px 0;}
.about-stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;}
.about-stat b{font-size:30px;color:var(--primary);display:block;margin-bottom:6px;}
.about-stat span{color:var(--muted);font-size:14px;}
.info-table td:first-child{width:180px;color:var(--muted);}

/* ===== 页脚 ===== */
.footer{background:#0f172a;color:#cbd5e1;padding:56px 0 30px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:38px;}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;}
.footer a{color:#94a3b8;display:block;margin-bottom:10px;font-size:14px;}
.footer a:hover{color:#fff;text-decoration:none;}
.footer p{color:#94a3b8;font-size:14px;margin-bottom:10px;}
.footer-bottom{border-top:1px solid #1e293b;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#64748b;}
.footer-bottom a{color:#94a3b8;display:inline;margin:0 6px;}

/* 响应式 */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .grid3,.steps,.about-card{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .scenes,.grid2{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 0;}
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 24px;width:100%;}
  .nav-toggle{display:block;}
  .hero h1{font-size:30px;}
  .grid3,.steps,.about-card,.footer-grid{grid-template-columns:1fr;}
  .section{padding:54px 0;}
  .page-head h1{font-size:25px;}
}