/* 速还原官网共用样式 —— 纯 CSS 无框架 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-soft: #e8effd;
  --text: #1f2937;
  --muted: #6b7280;
  --bg-soft: #f5f7fb;
  --border: #e5e7eb;
}
* { 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;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: #fff; border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 60px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 700; color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--primary); color: #fff; font-size: 17px; font-weight: 700;
}
.brand small { font-weight: 400; color: var(--muted); font-size: 12px; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px; }
.site-nav a {
  padding: 7px 14px; border-radius: 6px;
  color: var(--muted); font-size: 15px;
}
.site-nav a:hover { color: var(--primary); background: var(--bg-soft); text-decoration: none; }
.site-nav a.active { color: var(--primary); background: var(--primary-soft); font-weight: 600; }

/* ---------- 首屏 ---------- */
.hero { background: linear-gradient(180deg, #eef4ff 0%, #ffffff 100%); padding: 60px 0 52px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 1fr;
  gap: 44px; align-items: center;
}
.eyebrow {
  display: inline-block; margin: 0 0 10px; padding: 3px 12px;
  border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark);
  font-size: 13px; font-weight: 600;
}
.hero h1 {
  margin: 0 0 14px; font-size: 36px; line-height: 1.35; color: #111827;
}
.lead { font-size: 17px; color: #374151; margin: 0 0 22px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.hero-points { margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
.hero-points li { padding-left: 22px; position: relative; }
.hero-points li::before {
  content: "✓"; position: absolute; left: 2px; color: var(--primary); font-weight: 700;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 10px 24px; border-radius: 8px;
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
  transition: background .15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { border-color: var(--primary); color: var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); }

/* ---------- 区块 ---------- */
.section { padding: 56px 0; }
.section.alt { background: var(--bg-soft); }
.section-title {
  margin: 0 0 8px; text-align: center; font-size: 28px; color: #111827;
}
.section-sub { text-align: center; color: var(--muted); margin: 0 0 36px; }

/* 卡片 */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  padding: 24px 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; display: flex; align-items: center; gap: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .ico {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 8px; flex: none;
  background: var(--primary-soft); font-size: 17px;
}

/* 场景卡（大卡） */
.scene-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.scene {
  background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 26px;
}
.scene h3 { margin: 0 0 6px; font-size: 19px; }
.scene .tagline { color: var(--primary); font-size: 14px; margin: 0 0 12px; }
.scene ul { margin: 0; padding-left: 20px; color: #374151; font-size: 14.5px; }
.scene li { margin-bottom: 6px; }

/* ---------- 截图 ---------- */
.shot {
  margin: 0; border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden; background: #fff;
  box-shadow: 0 6px 24px rgba(17, 24, 39, .08);
}
.shot img { display: block; width: 100%; }
.shot figcaption {
  padding: 9px 14px; font-size: 13px; color: var(--muted);
  border-top: 1px solid var(--border); background: #fafbfe;
}
.shot-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.shot-row { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; align-items: start; }

/* 功能分节（图文左右） */
.feature-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 36px;
  align-items: center; margin-bottom: 56px;
}
.feature-block:last-child { margin-bottom: 0; }
.feature-block.reverse .fb-text { order: 2; }
.fb-text h3 { margin: 0 0 10px; font-size: 21px; color: #111827; }
.fb-text p { color: #374151; font-size: 15px; margin: 0 0 10px; }
.fb-text ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14.5px; }
.fb-text li { margin-bottom: 5px; }

/* ---------- 表格 ---------- */
table.tbl { border-collapse: collapse; width: 100%; background: #fff; }
.tbl th, .tbl td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; font-size: 14.5px; }
.tbl th { background: var(--primary-soft); color: var(--primary-dark); }
.tbl tr:nth-child(even) td { background: #fafbfe; }

/* ---------- 徽标 / 提示框 ---------- */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  background: #fef3c7; color: #92400e; font-size: 12.5px; font-weight: 600;
}
.note {
  border-radius: 10px; padding: 14px 18px; font-size: 14.5px; margin: 18px 0;
}
.note.info { background: #e8f2ff; border: 1px solid #b6d4f5; color: #1e3a8a; }
.note.warn { background: #fffbeb; border: 1px solid #f3d47a; color: #92400e; }

/* ---------- 微信 CTA ---------- */
.cta-box {
  display: flex; gap: 28px; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  padding: 30px; flex-wrap: wrap;
}
.cta-box .qr { text-align: center; }
.cta-box .qr img { width: 150px; height: 150px; border-radius: 10px; border: 1px solid var(--border); display: block; }
.cta-box .qr span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.cta-info h3 { margin: 0 0 8px; font-size: 20px; }
.cta-info p { margin: 0 0 6px; color: #374151; font-size: 15px; }
.cta-info .wx { font-size: 18px; font-weight: 700; color: var(--primary); }

/* ---------- FAQ ---------- */
.faq-item {
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 20px; margin-bottom: 14px;
}
.faq-item h3 { margin: 0 0 8px; font-size: 16px; color: #111827; }
.faq-item p { margin: 0; color: #374151; font-size: 14.5px; }
.faq-item code, .note code, .fb-text code {
  background: #f1f3f7; border-radius: 4px; padding: 1px 6px; font-size: 13px;
}

/* ---------- 页脚 ---------- */
.site-footer { background: #111827; color: #9ca3af; margin-top: 0; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding: 36px 20px 20px;
}
.footer-inner .brand { color: #fff; }
.footer-inner p { margin: 6px 0; font-size: 14px; }
.footer-copy { border-top: 1px solid #1f2937; padding: 14px 20px 22px; font-size: 13px; color: #6b7280; }

/* ---------- 响应式 ---------- */
@media (max-width: 880px) {
  .hero-grid, .feature-block, .shot-pair, .shot-row { grid-template-columns: 1fr; }
  .feature-block.reverse .fb-text { order: 0; }
  .hero h1 { font-size: 28px; }
  .section { padding: 40px 0; }
}