:root {
    --bg: #f6f8fc;
    --card: #ffffff;
    --ink: #1c2431;
    --ink-soft: #5b6675;
    --line: #e3e8f0;
    --blue: #2b6fd4;
    --blue-deep: #1a4e9e;
    --blue-soft: #e8f0fc;
    --pink: #fdecef;
    --radius: 16px;
    --shadow: 0 8px 26px rgba(28, 36, 49, .07);
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: 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;
    justify-content: space-between;
    gap: 16px;
    height: 66px;
  }
  .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .brand img { height: 34px; width: auto; border-radius: 8px; }
  .brand-name { font-size: 19px; font-weight: 700; letter-spacing: .5px; }
  .nav { display: none; }
  .nav a {
    font-size: 15px;
    color: var(--ink-soft);
    padding: 6px 12px;
    border-radius: 8px;
    transition: color .2s, background .2s;
  }
  .nav a:hover { color: var(--blue); background: var(--blue-soft); }
  .nav a.active { color: var(--blue); font-weight: 600; }

  /* ---------- hero ---------- */
  .hero { padding: 44px 0 56px; background: linear-gradient(180deg, #eef4fd 0%, var(--bg) 100%); }
  .hero-grid { display: grid; grid-template-columns: 1fr; gap: 36px; align-items: center; }
  .hero-kicker {
    display: inline-block;
    font-size: 13px;
    color: var(--blue-deep);
    background: var(--blue-soft);
    border-radius: 999px;
    padding: 4px 14px;
    margin-bottom: 16px;
  }
  .hero h1 {
    font-size: 32px;
    line-height: 1.3;
    margin: 0 0 14px;
    letter-spacing: -.5px;
  }
  .hero h1 span { color: var(--blue); }
  .hero-sub {
    font-size: 17px;
    color: var(--ink-soft);
    margin: 0 0 18px;
  }
  .hero-desc { font-size: 15px; color: var(--ink-soft); margin: 0 0 22px; max-width: 560px; }
  .tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
  .tag {
    font-size: 13.5px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 14px;
    color: var(--ink-soft);
  }
  .tag strong { color: var(--blue); font-weight: 600; margin-right: 4px; }
  .btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 26px;
    border-radius: 10px;
    transition: transform .18s, box-shadow .18s, background .18s;
  }
  .btn-primary {
    background: var(--blue);
    color: #fff;
    box-shadow: 0 8px 18px rgba(43, 111, 212, .28);
  }
  .btn-primary:hover { background: var(--blue-deep); transform: translateY(-2px); }
  .btn-ghost {
    background: #fff;
    color: var(--blue);
    border: 1px solid #c8d8f1;
  }
  .btn-ghost:hover { background: var(--blue-soft); transform: translateY(-2px); }

  .app-card {
    background: var(--card);
    border-radius: 22px;
    padding: 26px;
    box-shadow: var(--shadow);
    border: 1px solid var(--line);
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
  }
  .app-badge {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: #a2455c;
    background: var(--pink);
    border-radius: 999px;
    padding: 4px 14px;
    margin-bottom: 16px;
  }
  .app-card-title { font-size: 19px; margin: 0 0 6px; }
  .app-card-sub { font-size: 14px; color: var(--ink-soft); margin: 0 0 20px; }
  .app-shot {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--line);
    margin-bottom: 18px;
  }
  .store-row { display: flex; flex-wrap: wrap; gap: 10px; }
  .store-btn {
    flex: 1 1 130px;
    text-align: center;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--blue-deep);
    background: var(--blue-soft);
    border-radius: 10px;
    padding: 10px 8px;
  }

  /* ---------- section base ---------- */
  section { padding: 54px 0; }
  .sec-head { margin-bottom: 28px; }
  .sec-head h2 { font-size: 25px; margin: 0 0 8px; letter-spacing: -.3px; }
  .sec-head p { margin: 0; color: var(--ink-soft); font-size: 15px; }
  .sec-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

  /* ---------- showcase ---------- */
  .showcase { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .poster-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .poster-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    transition: transform .2s, box-shadow .2s;
  }
  .poster-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
  .poster-card img { aspect-ratio: 3 / 4; object-fit: cover; width: 100%; }
  .poster-meta { padding: 10px 12px 12px; }
  .poster-meta h3 { font-size: 15px; margin: 0 0 6px; line-height: 1.4; }
  .poster-line { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12.5px; color: var(--ink-soft); }
  .score { color: #d9722b; font-weight: 700; font-size: 13px; }
  .status { color: var(--blue); }

  /* ---------- ranking ---------- */
  .rank-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
  .rank-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--line);
  }
  .rank-item:last-child { border-bottom: none; }
  .rank-no {
    flex: 0 0 30px;
    height: 30px;
    border-radius: 8px;
    background: var(--blue-soft);
    color: var(--blue-deep);
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .rank-item:first-child .rank-no { background: var(--blue); color: #fff; }
  .rank-main { flex: 1 1 auto; min-width: 0; }
  .rank-main h3 { font-size: 15.5px; margin: 0 0 3px; }
  .rank-main p { margin: 0; font-size: 12.5px; color: var(--ink-soft); }
  .rank-side { text-align: right; font-size: 12.5px; color: var(--ink-soft); flex-shrink: 0; }

  /* ---------- qa ---------- */
  .qa-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
  .qa-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 20px;
  }
  .qa-user { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-soft); margin-bottom: 10px; }
  .avatar {
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--blue-soft); color: var(--blue-deep);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 700;
  }
  .qa-card h3 { font-size: 15px; margin: 0 0 12px; line-height: 1.7; font-weight: 600; }
  .qa-reply {
    font-size: 13.5px;
    color: var(--ink-soft);
    background: var(--bg);
    border-left: 3px solid #c8d8f1;
    border-radius: 0 8px 8px 0;
    padding: 9px 12px;
  }
  .qa-reply b { color: var(--blue); font-weight: 600; }

  /* ---------- feature ---------- */
  .feature { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .feat-list { display: grid; grid-template-columns: 1fr; gap: 16px; }
  .feat-item {
    display: flex;
    gap: 14px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--card);
  }
  .feat-num {
    flex: 0 0 34px; height: 34px;
    border-radius: 10px;
    background: var(--blue-soft);
    color: var(--blue-deep);
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px;
  }
  .feat-item h3 { font-size: 16px; margin: 0 0 6px; }
  .feat-item p { margin: 0; font-size: 14px; color: var(--ink-soft); }

  /* ---------- gallery ---------- */
  .shot-wall { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .shot-wall figure { margin: 0; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: #fff; }
  .shot-wall img { aspect-ratio: 1 / 1; object-fit: cover; width: 100%; }
  .shot-wall figcaption { font-size: 12px; color: var(--ink-soft); padding: 8px 10px; }

  /* ---------- faq ---------- */
  .faq-list { display: grid; gap: 12px; }
  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px 20px;
  }
  .faq-item h3 { font-size: 15.5px; margin: 0 0 8px; }
  .faq-item p { margin: 0; font-size: 14px; color: var(--ink-soft); }

  /* ---------- final cta ---------- */
  .final-cta {
    background: linear-gradient(135deg, #1e4f9e 0%, #2b6fd4 100%);
    color: #fff;
    border-radius: 22px;
    padding: 40px 26px;
    text-align: center;
  }
  .final-cta h2 { font-size: 25px; margin: 0 0 12px; color: #fff; }
  .final-cta p { margin: 0 auto 24px; max-width: 560px; font-size: 15px; color: #dce8fb; }
  .cta-stores { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
  .cta-store {
    font-size: 14px;
    font-weight: 600;
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .34);
    border-radius: 10px;
    padding: 11px 24px;
    color: #fff;
  }
  .cta-note { margin-top: 18px; font-size: 12.5px; color: #bdd2f2; }

  /* ---------- footer ---------- */
  .site-footer {
    padding: 36px 0 30px;
    border-top: 1px solid var(--line);
    background: #f2f5fa;
  }
  .foot-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-weight: 700; font-size: 15px; }
  .foot-brand img { height: 24px; width: auto; border-radius: 6px; }
  .foot-desc { font-size: 13px; color: var(--ink-soft); margin: 0 0 16px; max-width: 460px; }
  .foot-meta { font-size: 12px; color: #8b95a4; line-height: 2; }
  .foot-meta a { color: #8b95a4; }
  .foot-meta a:hover { color: var(--blue); }
  .foot-sep { margin: 0 8px; }

  /* ---------- breakpoints ---------- */
  @media (min-width: 768px) {
    .header-inner { height: 72px; }
    .nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
    .hero { padding: 60px 0 72px; }
    .hero h1 { font-size: 40px; }
    .hero-sub { font-size: 19px; }
    .poster-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
    .qa-grid { grid-template-columns: repeat(2, 1fr); }
    .feat-list { grid-template-columns: repeat(2, 1fr); }
    .shot-wall { grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .final-cta { padding: 54px 40px; }
    .final-cta h2 { font-size: 30px; }
  }
  @media (min-width: 1024px) {
    .hero-grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 48px; }
    .app-card { margin: 0; }
    .poster-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .qa-grid { grid-template-columns: repeat(3, 1fr); }
    .feat-list { grid-template-columns: repeat(4, 1fr); }
    .feat-item { flex-direction: column; }
    .shot-wall { grid-template-columns: repeat(4, 1fr); }
    .rank-item { padding: 18px 24px; }
    .sec-head h2 { font-size: 28px; }
    .hero h1 { font-size: 44px; }
  }