:root {
    --bg: #0e0e12;
    --bg-soft: #16161d;
    --card: #1c1c26;
    --line: #2a2a38;
    --text: #f2f2f5;
    --muted: #9b9baa;
    --gold: #ffcf3f;
    --gold-deep: #e0a800;
    --red: #ff4d5e;
    --radius: 14px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  img { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  .wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
  .accent { color: var(--gold); }
  .red { color: var(--red); }

  /* ===== Header ===== */
  .site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(14,14,18,0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
  }
  .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
  .brand img { height: 34px; width: auto; border-radius: 8px; }
  .nav-links { display: flex; gap: 26px; font-size: 14px; color: var(--muted); }
  .nav-links a:hover { color: var(--gold); }
  .nav-dl {
    display: none;
    background: var(--gold); color: #1a1600; font-weight: 700;
    padding: 8px 18px; border-radius: 999px; font-size: 14px;
  }
  @media (min-width: 768px) { .nav-dl { display: inline-block; } }
  @media (max-width: 767px) { .nav-links { display: none; } }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    padding: 56px 0 48px;
    background:
      radial-gradient(ellipse 60% 55% at 78% 8%, rgba(255,207,63,0.16), transparent 62%),
      radial-gradient(ellipse 50% 45% at 10% 90%, rgba(255,77,94,0.14), transparent 65%);
    overflow: hidden;
  }
  .hero-grid {
    display: grid; gap: 40px; align-items: center;
    grid-template-columns: 1fr;
  }
  .hero-tag {
    display: inline-flex; align-items: center; gap: 8px;
    border: 1px solid rgba(255,207,63,0.5);
    color: var(--gold); font-size: 13px; font-weight: 600;
    padding: 5px 14px; border-radius: 999px; margin-bottom: 18px;
    background: rgba(255,207,63,0.08);
  }
  .hero-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--red); }
  .hero h1 {
    font-size: clamp(30px, 5.4vw, 52px);
    line-height: 1.22; letter-spacing: -0.5px; font-weight: 800;
    margin-bottom: 18px;
  }
  .hero h1 span { color: var(--gold); }
  .hero-sub { color: var(--muted); font-size: 16px; max-width: 520px; margin-bottom: 14px; }
  .hero-sub b { color: var(--text); font-weight: 600; }
  .hero-slogan {
    display: inline-block; font-size: 14px; color: var(--gold);
    border-left: 3px solid var(--gold); padding-left: 10px; margin-bottom: 28px;
  }
  .btn-main {
    display: inline-flex; align-items: center; justify-content: center; gap: 10px;
    background: linear-gradient(135deg, #ffdb5c, #ffb703);
    color: #231b00; font-weight: 800; font-size: 17px;
    padding: 15px 40px; border-radius: 999px;
    box-shadow: 0 10px 30px rgba(255,183,3,0.32);
    transition: transform .2s, box-shadow .2s;
  }
  .btn-main:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(255,183,3,0.45); }
  .btn-main svg { width: 20px; height: 20px; }
  .hero-notes { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 18px; font-size: 13px; color: var(--muted); }
  .hero-notes span::before { content: "✓ "; color: var(--gold); font-weight: 700; }

  .hero-visual { position: relative; display: flex; justify-content: center; }
  .hero-covers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; width: 100%; max-width: 430px; }
  .hero-covers img {
    width: 100%; aspect-ratio: 3 / 4; object-fit: cover;
    border-radius: 12px; border: 1px solid var(--line);
    box-shadow: 0 14px 34px rgba(0,0,0,0.55);
    transition: transform .35s;
  }
  .hero-covers img:nth-child(2) { transform: translateY(-18px); }
  .hero-covers img:hover { transform: translateY(-8px) scale(1.02); }
  .hero-covers img:nth-child(2):hover { transform: translateY(-24px) scale(1.02); }

  @media (min-width: 1024px) {
    .hero-grid { grid-template-columns: 1.05fr 0.95fr; gap: 30px; }
    .hero { padding: 76px 0 66px; }
  }

  /* ===== Section base ===== */
  section { padding: 56px 0; }
  .sec-head { margin-bottom: 32px; }
  .sec-head .kicker {
    display: inline-block; font-size: 13px; font-weight: 700;
    color: var(--gold); letter-spacing: 1px; margin-bottom: 8px;
  }
  .sec-head h2 { font-size: clamp(23px, 3.6vw, 32px); font-weight: 800; line-height: 1.3; }
  .sec-head p { color: var(--muted); font-size: 15px; margin-top: 10px; max-width: 620px; }
  @media (min-width: 768px) { section { padding: 72px 0; } }

  /* ===== About ===== */
  .about { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .about-grid { display: grid; gap: 30px; grid-template-columns: 1fr; }
  .about-text p { color: var(--muted); margin-bottom: 14px; font-size: 15px; }
  .about-text p b { color: var(--text); }
  .about-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .fact {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 18px 16px;
  }
  .fact .num { color: var(--gold); font-weight: 800; font-size: 16px; margin-bottom: 4px; }
  .fact .txt { font-size: 13px; color: var(--muted); line-height: 1.55; }
  @media (min-width: 1024px) { .about-grid { grid-template-columns: 1.15fr 0.85fr; gap: 50px; } }

  /* ===== Zones (AI / 魔改 / 二创) ===== */
  .zones-grid { display: grid; gap: 20px; grid-template-columns: 1fr; }
  .zone {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); overflow: hidden;
    display: flex; flex-direction: column;
  }
  .zone-img { position: relative; }
  .zone-img img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
  .zone-img .badge {
    position: absolute; top: 12px; left: 12px;
    background: rgba(255,77,94,0.92); color: #fff;
    font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 6px;
  }
  .zone-body { padding: 18px 18px 22px; flex: 1; }
  .zone-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
  .zone-body p { font-size: 14px; color: var(--muted); }
  @media (min-width: 768px) { .zones-grid { grid-template-columns: repeat(3, 1fr); } }

  /* ===== Hot list ===== */
  .hot-grid { display: grid; gap: 16px; grid-template-columns: repeat(2, 1fr); }
  .hot-item { border-radius: 12px; overflow: hidden; position: relative; background: #000; }
  .hot-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; transition: transform .4s, opacity .4s; opacity: .92; }
  .hot-item:hover img { transform: scale(1.05); opacity: 1; }
  .hot-item .meta {
    position: absolute; left: 0; right: 0; bottom: 0;
    padding: 26px 12px 10px;
    background: linear-gradient(to top, rgba(0,0,0,0.88), transparent);
    font-size: 13px; font-weight: 600;
  }
  .hot-item .tag { display: block; font-size: 11px; color: var(--gold); font-weight: 500; margin-top: 2px; }
  @media (min-width: 768px) { .hot-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; } }

  /* ===== Topics ===== */
  .topics { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .topic-list { display: grid; gap: 22px; grid-template-columns: 1fr; }
  .topic {
    display: grid; grid-template-columns: 118px 1fr; gap: 16px;
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 14px; align-items: center;
  }
  .topic img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; border-radius: 8px; }
  .topic h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
  .topic p { font-size: 14px; color: var(--muted); }
  .topic .topic-tag {
    display: inline-block; margin-top: 10px; font-size: 12px;
    color: var(--gold); border: 1px solid rgba(255,207,63,0.45);
    padding: 2px 10px; border-radius: 999px;
  }
  @media (min-width: 768px) { .topic-list { grid-template-columns: repeat(2, 1fr); } }

  /* ===== Features ===== */
  .feat-grid { display: grid; gap: 16px; grid-template-columns: 1fr; }
  .feat {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 22px;
    border-top: 2px solid var(--gold);
  }
  .feat h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
  .feat p { font-size: 14px; color: var(--muted); }
  @media (min-width: 768px) { .feat-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (min-width: 1024px) { .feat-grid { grid-template-columns: repeat(3, 1fr); } }

  /* ===== Reviews marquee ===== */
  .reviews { overflow: hidden; }
  .marquee { position: relative; display: flex; flex-direction: column; gap: 14px; }
  .marquee::before, .marquee::after {
    content: ""; position: absolute; top: 0; bottom: 0; width: 60px; z-index: 2; pointer-events: none;
  }
  .marquee::before { left: 0; background: linear-gradient(to right, var(--bg), transparent); }
  .marquee::after { right: 0; background: linear-gradient(to left, var(--bg), transparent); }
  .mrow { display: flex; gap: 14px; width: max-content; animation: scrollX 46s linear infinite; }
  .mrow.rev { animation-direction: reverse; animation-duration: 58s; }
  .marquee:hover .mrow { animation-play-state: paused; }
  @keyframes scrollX {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
  }
  .bubble {
    flex: 0 0 auto;
    background: var(--card); border: 1px solid var(--line);
    border-radius: 999px; padding: 10px 18px;
    font-size: 14px; color: var(--text); white-space: nowrap;
  }
  .bubble .who { color: var(--gold); font-size: 12px; margin-left: 6px; }
  @media (prefers-reduced-motion: reduce) {
    .mrow { animation: none; flex-wrap: wrap; width: 100%; }
  }

  /* ===== Download ===== */
  .download {
    background:
      radial-gradient(ellipse 70% 80% at 50% 0%, rgba(255,207,63,0.16), transparent 65%),
      var(--bg-soft);
    border-top: 1px solid var(--line);
    text-align: center;
  }
  .download h2 { font-size: clamp(24px, 4vw, 36px); font-weight: 800; margin-bottom: 12px; }
  .download .lead { color: var(--muted); max-width: 560px; margin: 0 auto 28px; font-size: 15px; }
  .dl-btn {
    display: inline-flex; align-items: center; gap: 10px;
    background: linear-gradient(135deg, #ffdb5c, #ffb703);
    color: #231b00; font-weight: 800; font-size: 19px;
    padding: 18px 56px; border-radius: 999px;
    box-shadow: 0 14px 40px rgba(255,183,3,0.4);
    transition: transform .2s, box-shadow .2s;
  }
  .dl-btn:hover { transform: translateY(-3px) scale(1.01); box-shadow: 0 18px 48px rgba(255,183,3,0.55); }
  .dl-btn svg { width: 22px; height: 22px; }
  .dl-sub { margin-top: 16px; font-size: 13px; color: var(--muted); }
  .dl-steps { display: grid; gap: 14px; grid-template-columns: 1fr; max-width: 900px; margin: 40px auto 0; text-align: left; }
  .dl-step {
    background: var(--card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 16px 18px; display: flex; gap: 14px; align-items: flex-start;
  }
  .dl-step .n {
    flex: 0 0 28px; height: 28px; border-radius: 50%;
    background: rgba(255,207,63,0.16); color: var(--gold);
    font-weight: 800; font-size: 14px; display: flex; align-items: center; justify-content: center;
  }
  .dl-step h3 { font-size: 15px; margin-bottom: 3px; }
  .dl-step p { font-size: 13px; color: var(--muted); }
  @media (min-width: 768px) { .dl-steps { grid-template-columns: repeat(3, 1fr); } }

  /* ===== FAQ ===== */
  .faq-list { display: grid; gap: 12px; max-width: 860px; margin: 0 auto; }
  .faq-item {
    background: var(--card); border: 1px solid var(--line);
    border-radius: 12px; overflow: hidden;
  }
  .faq-q {
    width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
    color: var(--text); font-size: 15px; font-weight: 600;
    padding: 16px 46px 16px 18px; position: relative; font-family: inherit;
  }
  .faq-q::after {
    content: "+"; position: absolute; right: 18px; top: 50%;
    transform: translateY(-50%); color: var(--gold); font-size: 20px; font-weight: 400;
    transition: transform .25s;
  }
  .faq-item.open .faq-q::after { transform: translateY(-50%) rotate(45deg); }
  .faq-a {
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
    color: var(--muted); font-size: 14px;
  }
  .faq-a p { padding: 0 18px 16px; }
  .faq-item.open .faq-a { max-height: 260px; }

  /* ===== Footer ===== */
  .site-footer {
    border-top: 1px solid var(--line);
    background: var(--bg);
    padding: 40px 0 30px;
  }
  .footer-top {
    display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between;
    align-items: flex-start; margin-bottom: 26px;
  }
  .footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; margin-bottom: 10px; }
  .footer-brand img { height: 30px; width: auto; border-radius: 7px; }
  .footer-desc { color: var(--muted); font-size: 13px; max-width: 380px; }
  .footer-links { display: flex; flex-wrap: wrap; gap: 10px 22px; font-size: 13px; color: var(--muted); }
  .footer-links a:hover { color: var(--gold); }
  .footer-bottom {
    border-top: 1px solid var(--line); padding-top: 18px;
    display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between;
    font-size: 12px; color: #6f6f80;
  }
  .footer-bottom time { color: #6f6f80; }