:root {
    --blue: #1a6bff;
    --blue-dark: #0f4fd1;
    --ink: #0d1421;
    --ink-soft: #43506b;
    --line: #e6ebf4;
    --bg: #ffffff;
    --bg-soft: #f5f8fd;
    --radius: 14px;
    --shadow: 0 4px 18px rgba(18, 43, 92, .07);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    color: var(--ink);
    background:
      linear-gradient(var(--bg-soft) 1px, transparent 1px) 0 0 / 100% 56px,
      linear-gradient(90deg, var(--bg-soft) 1px, transparent 1px) 0 0 / 56px 100%,
      var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  img { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  ul { list-style: none; }
  .wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }

  /* ============ header ============ */
  .site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    display: flex; align-items: center; gap: 28px;
    height: 68px;
  }
  .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .brand img { height: 34px; width: auto; }
  .brand-name { font-size: 18px; font-weight: 800; letter-spacing: .5px; }
  .main-nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
  .main-nav a {
    font-size: 14px; color: var(--ink-soft); padding: 6px 10px;
    border-radius: 8px; transition: color .2s, background .2s;
  }
  .main-nav a:hover { color: var(--blue); background: #eef3ff; }
  .header-cta { flex-shrink: 0; }
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 22px; border-radius: 10px; font-size: 15px; font-weight: 700;
    cursor: pointer; border: 1px solid transparent; transition: transform .18s, box-shadow .18s, background .18s;
  }
  .btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 16px rgba(26,107,255,.28); }
  .btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); }
  .btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
  .btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

  /* ============ hero ============ */
  .hero { padding: 56px 0 64px; position: relative; }
  .hero-grid {
    display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
  }
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 700; color: var(--blue);
    background: #eaf1ff; border-radius: 999px; padding: 5px 14px; margin-bottom: 18px;
  }
  .hero-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
  .hero h1 {
    font-size: 44px; line-height: 1.22; font-weight: 900; letter-spacing: -.5px;
    margin-bottom: 18px;
  }
  .hero h1 em { font-style: normal; color: var(--blue); }
  .hero-lead { font-size: 16px; color: var(--ink-soft); max-width: 520px; margin-bottom: 26px; }
  .hero-points { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-bottom: 30px; }
  .hero-points span {
    font-size: 13.5px; color: var(--ink-soft); background: #fff;
    border: 1px solid var(--line); border-radius: 8px; padding: 5px 12px;
  }
  .download-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
  .download-note { font-size: 12.5px; color: #7b87a1; margin-top: 14px; }

  .hero-visual { position: relative; }
  .phone-stack { position: relative; display: flex; justify-content: center; }
  .phone-main {
    width: 246px; border-radius: 26px; overflow: hidden; background: #fff;
    box-shadow: 0 24px 60px rgba(16, 39, 92, .18); border: 6px solid #10182b;
  }
  .phone-side {
    position: absolute; width: 152px; border-radius: 20px; overflow: hidden;
    box-shadow: 0 16px 36px rgba(16, 39, 92, .16); border: 4px solid #10182b;
    background: #fff;
  }
  .phone-side.left { left: 0; bottom: -22px; transform: rotate(-5deg); }
  .phone-side.right { right: 0; top: -18px; transform: rotate(5deg); }
  .hero-float {
    position: absolute; left: 50%; bottom: -6px; transform: translateX(-50%);
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    box-shadow: var(--shadow); padding: 8px 14px; font-size: 12.5px; color: var(--ink-soft);
    white-space: nowrap;
  }

  /* ============ generic section ============ */
  section { padding: 72px 0; }
  .sec-head { max-width: 680px; margin-bottom: 40px; }
  .sec-kicker {
    font-size: 13px; font-weight: 800; color: var(--blue); letter-spacing: 1px;
    text-transform: uppercase; margin-bottom: 10px;
  }
  .sec-head h2 { font-size: 32px; font-weight: 900; letter-spacing: -.4px; line-height: 1.3; }
  .sec-head p { margin-top: 12px; font-size: 15.5px; color: var(--ink-soft); }
  .alt-bg { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

  /* ============ 认识拷贝漫画 ============ */
  .feature-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  }
  .feature-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 22px 20px; box-shadow: var(--shadow);
    transition: transform .2s, border-color .2s;
  }
  .feature-card:hover { transform: translateY(-4px); border-color: #c6d8ff; }
  .feature-ico {
    width: 38px; height: 38px; border-radius: 10px; background: #eaf1ff;
    display: flex; align-items: center; justify-content: center;
    color: var(--blue); font-weight: 900; font-size: 15px; margin-bottom: 14px;
  }
  .feature-card h3 { font-size: 16px; font-weight: 800; margin-bottom: 6px; }
  .feature-card p { font-size: 13.5px; color: var(--ink-soft); }

  /* ============ 平台特色 Z 字 ============ */
  .z-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
    padding: 26px 0;
  }
  .z-row + .z-row { border-top: 1px dashed var(--line); }
  .z-row.reverse .z-text { order: 2; }
  .z-row.reverse .z-media { order: 1; }
  .z-text h3 { font-size: 22px; font-weight: 900; margin-bottom: 12px; }
  .z-text p { font-size: 15px; color: var(--ink-soft); margin-bottom: 14px; }
  .z-list { display: grid; gap: 9px; }
  .z-list li { font-size: 14px; color: var(--ink-soft); display: flex; gap: 9px; }
  .z-list li::before {
    content: ""; flex-shrink: 0; width: 6px; height: 6px; margin-top: 9px;
    border-radius: 50%; background: var(--blue);
  }
  .z-media {
    border-radius: 18px; overflow: hidden; border: 1px solid var(--line);
    box-shadow: var(--shadow); background: #fff;
  }
  .z-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }

  /* ============ 热门标签 ============ */
  .tag-cloud { display: flex; flex-wrap: wrap; gap: 12px; }
  .tag-cloud a {
    display: inline-block; padding: 9px 18px; border-radius: 999px;
    background: #fff; border: 1px solid var(--line); font-size: 14px; color: var(--ink-soft);
    transition: all .2s;
  }
  .tag-cloud a:hover { background: var(--blue); border-color: var(--blue); color: #fff; }
  .tag-cloud a.hot { background: #eaf1ff; color: var(--blue); border-color: #cddcff; font-weight: 700; }

  /* ============ 热度榜单 阶梯 ============ */
  .rank-list { display: grid; gap: 12px; }
  .rank-item {
    display: grid; grid-template-columns: 54px 1fr auto; gap: 18px; align-items: center;
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    padding: 14px 20px; box-shadow: var(--shadow);
    margin-left: calc(var(--step, 0) * 12px);
    transition: transform .2s;
  }
  .rank-item:hover { transform: translateX(4px); }
  .rank-no {
    font-size: 22px; font-weight: 900; color: #c3cee3; text-align: center;
    font-variant-numeric: tabular-nums;
  }
  .rank-item:nth-child(1) .rank-no { color: var(--blue); }
  .rank-item:nth-child(2) .rank-no { color: #4a85ff; }
  .rank-item:nth-child(3) .rank-no { color: #7aa3ff; }
  .rank-title { font-size: 15.5px; font-weight: 800; }
  .rank-desc { font-size: 13px; color: var(--ink-soft); }
  .rank-badge {
    font-size: 12px; font-weight: 700; color: var(--blue); background: #eaf1ff;
    border-radius: 999px; padding: 4px 12px; white-space: nowrap;
  }

  /* ============ 应用截图 ============ */
  .shots-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  }
  .shot {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
    transition: transform .22s;
  }
  .shot:hover { transform: translateY(-5px); }
  .shot img { width: 100%; aspect-ratio: 9/16; object-fit: cover; }
  .shot-cap { font-size: 13px; color: var(--ink-soft); padding: 10px 14px; border-top: 1px solid var(--line); }

  /* ============ 使用反馈 ============ */
  .feedback-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .fb-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 22px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 12px;
  }
  .fb-head { display: flex; align-items: center; gap: 10px; }
  .fb-avatar {
    width: 36px; height: 36px; border-radius: 50%; object-fit: contain;
    background: #f2f6ff; padding: 4px; border: 1px solid #dbe6ff; flex-shrink: 0;
  }
  .fb-name { font-size: 14px; font-weight: 800; }
  .fb-meta { font-size: 12px; color: #8491a9; }
  .fb-text { font-size: 14px; color: var(--ink-soft); }

  /* ============ 隐私安全 ============ */
  .safe-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .safe-card {
    border: 1px solid var(--line); background: #fff; border-radius: var(--radius);
    padding: 22px; box-shadow: var(--shadow);
  }
  .safe-card h3 { font-size: 15.5px; font-weight: 800; margin-bottom: 8px; }
  .safe-card p { font-size: 13.5px; color: var(--ink-soft); }

  /* ============ FAQ ============ */
  .faq-list { display: grid; gap: 12px; max-width: 900px; }
  .faq-item {
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    padding: 18px 22px; box-shadow: var(--shadow);
  }
  .faq-item summary {
    cursor: pointer; font-size: 15.5px; font-weight: 800; list-style: none;
    display: flex; align-items: center; gap: 12px;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::before {
    content: "+"; color: var(--blue); font-size: 20px; font-weight: 800; line-height: 1;
  }
  .faq-item[open] summary::before { content: "−"; }
  .faq-item p { margin-top: 10px; font-size: 14px; color: var(--ink-soft); padding-left: 26px; }

  /* ============ 下载区 ============ */
  .download-section { background: linear-gradient(180deg, #f3f7ff 0%, #ffffff 100%); border-top: 1px solid var(--line); }
  .dl-box {
    display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center;
    background: #fff; border: 1px solid var(--line); border-radius: 20px;
    padding: 44px; box-shadow: 0 14px 44px rgba(20, 46, 100, .09);
  }
  .dl-box h2 { font-size: 30px; font-weight: 900; margin-bottom: 12px; letter-spacing: -.4px; }
  .dl-box p.intro { font-size: 15px; color: var(--ink-soft); margin-bottom: 22px; }
  .steps { display: grid; gap: 12px; margin-bottom: 26px; }
  .step { display: flex; gap: 12px; font-size: 14px; color: var(--ink-soft); }
  .step-n {
    flex-shrink: 0; width: 24px; height: 24px; border-radius: 7px; background: #eaf1ff;
    color: var(--blue); font-size: 13px; font-weight: 900; display: flex;
    align-items: center; justify-content: center;
  }
  .step b { color: var(--ink); }
  .qr-side { text-align: center; }
  .qr-frame {
    display: inline-block; padding: 14px; border: 1px solid var(--line);
    border-radius: 16px; background: #fff; box-shadow: var(--shadow);
  }
  .qr-frame img { width: 176px; height: 176px; object-fit: contain; }
  .qr-side p { font-size: 13px; color: var(--ink-soft); margin-top: 12px; }

  /* ============ footer ============ */
  .site-footer {
    border-top: 1px solid var(--line); background: #fff; padding: 46px 0 30px;
  }
  .footer-top {
    display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px;
    padding-bottom: 32px; border-bottom: 1px solid var(--line);
  }
  .footer-brand .fbrand-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
  .footer-brand img { height: 30px; width: auto; }
  .footer-brand h3 { font-size: 17px; font-weight: 800; }
  .footer-brand p { font-size: 13.5px; color: var(--ink-soft); max-width: 320px; }
  .footer-col h4 { font-size: 14px; font-weight: 800; margin-bottom: 12px; }
  .footer-col li { margin-bottom: 8px; }
  .footer-col a { font-size: 13.5px; color: var(--ink-soft); }
  .footer-col a:hover { color: var(--blue); }
  .footer-bottom {
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px;
    padding-top: 22px; font-size: 12.5px; color: #8491a9;
  }

  /* ============ 百度 App 复制弹窗 ============ */
  .copy-mask {
    display: none; position: fixed; inset: 0; z-index: 200;
    background: rgba(13, 20, 33, .55);
    align-items: center; justify-content: center; padding: 20px;
  }
  .copy-mask.show { display: flex; }
  .copy-dialog {
    background: #fff; border-radius: 16px; padding: 26px 24px; width: 100%; max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,.28);
  }
  .copy-dialog h3 { font-size: 16px; font-weight: 800; line-height: 1.5; margin-bottom: 16px; }
  .copy-url {
    font-size: 13px; color: var(--ink-soft); background: var(--bg-soft);
    border: 1px dashed #c8d6ee; border-radius: 10px; padding: 12px;
    word-break: break-all; margin-bottom: 16px;
  }
  .copy-actions { display: flex; gap: 10px; }
  .copy-actions .btn { flex: 1; padding: 10px; font-size: 14px; }
  .copy-tip { font-size: 12.5px; color: var(--blue); margin-top: 10px; min-height: 18px; }

  /* ============ responsive ============ */
  @media (max-width: 1024px) {
    .hero h1 { font-size: 36px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .shots-grid { grid-template-columns: repeat(3, 1fr); }
    .feedback-grid, .safe-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .dl-box { grid-template-columns: 1fr; padding: 34px; gap: 30px; }
    .qr-side { text-align: center; }
    .main-nav { display: none; }
    .z-row { gap: 32px; }
  }
  @media (max-width: 768px) {
    .header-inner { height: 60px; gap: 14px; }
    .brand img { height: 28px; }
    .brand-name { font-size: 16px; }
    .header-cta .btn { padding: 8px 14px; font-size: 13.5px; }
    .hero { padding: 36px 0 44px; }
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 29px; }
    .hero-lead { font-size: 15px; }
    section { padding: 48px 0; }
    .sec-head h2 { font-size: 24px; }
    .sec-head p { font-size: 14.5px; }
    .feature-grid { grid-template-columns: 1fr; }
    .z-row { grid-template-columns: 1fr; gap: 22px; }
    .z-row.reverse .z-text, .z-row.reverse .z-media { order: 0; }
    .shots-grid { grid-template-columns: repeat(2, 1fr); }
    .feedback-grid, .safe-grid { grid-template-columns: 1fr; }
    .rank-item { grid-template-columns: 40px 1fr; gap: 12px; margin-left: 0; padding: 12px 14px; }
    .rank-badge { grid-column: 2; justify-self: start; }
    .dl-box { padding: 24px 20px; border-radius: 16px; }
    .dl-box h2 { font-size: 23px; }
    .download-row .btn { flex: 1 1 100%; }
    .footer-top { grid-template-columns: 1fr; gap: 24px; }
    .phone-side { display: none; }
    .phone-main { width: 210px; }
    .copy-dialog { padding: 22px 18px; }
  }