:root {
    --bg: #0d0f12;
    --bg-soft: #14181d;
    --card: #1a1f26;
    --line: #262c35;
    --ink: #f2f4f7;
    --ink-dim: #9aa4b2;
    --ink-faint: #6b7480;
    --melon: #f4506b;
    --melon-deep: #c92a4a;
    --leaf: #35c7a4;
    --white: #e9f0ec;
    --radius: 10px;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }
  img { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  .wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

  /* ===== header ===== */
  .site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(13, 15, 18, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 62px;
  }
  .brand { display: flex; align-items: center; gap: 10px; }
  .brand img { height: 32px; width: auto; border-radius: 6px; }
  .brand-name { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
  .nav { display: flex; gap: 22px; }
  .nav a { font-size: 14px; color: var(--ink-dim); transition: color .2s; }
  .nav a:hover { color: var(--melon); }
  .header-cta {
    font-size: 14px; font-weight: 600; padding: 8px 16px;
    border-radius: 999px; background: var(--melon); color: #fff;
    transition: background .2s;
  }
  .header-cta:hover { background: var(--melon-deep); }

  /* ===== hero ===== */
  .hero { position: relative; padding: 60px 0 70px; overflow: hidden; }
  .hero::before {
    content: ""; position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 60% 50% at 78% 30%, rgba(244,80,107,.16), transparent 70%),
      radial-gradient(ellipse 50% 40% at 18% 70%, rgba(53,199,164,.12), transparent 70%);
    pointer-events: none;
  }
  .hero-inner {
    position: relative;
    display: grid; grid-template-columns: 1fr; gap: 44px; align-items: center;
  }
  .hero-copy h1 {
    font-size: 34px; line-height: 1.28; font-weight: 800; letter-spacing: -.5px;
    margin-bottom: 18px;
  }
  .hero-copy h1 em {
    font-style: normal;
    background: linear-gradient(100deg, var(--leaf), var(--white) 45%, var(--melon));
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .hero-copy p { color: var(--ink-dim); font-size: 15.5px; max-width: 520px; margin-bottom: 26px; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
  .btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--melon), var(--melon-deep));
    color: #fff; font-weight: 700; font-size: 15px;
    padding: 13px 26px; border-radius: 999px;
    box-shadow: 0 8px 26px rgba(244,80,107,.28);
    transition: transform .2s, box-shadow .2s;
  }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(244,80,107,.36); }
  .btn-ghost {
    display: inline-flex; align-items: center;
    padding: 12px 22px; border-radius: 999px;
    border: 1px solid var(--line); color: var(--ink-dim); font-size: 14.5px;
    transition: border-color .2s, color .2s;
  }
  .btn-ghost:hover { border-color: var(--melon); color: var(--melon); }

  /* arc visual */
  .hero-visual { position: relative; height: 300px; display: flex; align-items: center; justify-content: center; }
  .arc-scene { position: relative; width: 100%; max-width: 400px; height: 300px; }
  .arc {
    position: absolute; inset: 0;
    border-radius: 50% 50% 46% 54% / 58% 58% 42% 42%;
    background:
      conic-gradient(from 200deg at 50% 50%,
        #2f8f78 0deg, #6fd8b7 40deg, #e9f0ec 95deg,
        #f9c6ce 140deg, #f4506b 190deg, #c92a4a 240deg, #2f8f78 300deg);
    filter: saturate(1.05);
    transform: rotate(-12deg);
    box-shadow: inset 0 0 60px rgba(0,0,0,.42), 0 24px 60px rgba(0,0,0,.5);
    opacity: .96;
  }
  .arc::after {
    content: "";
    position: absolute; inset: 22%;
    border-radius: 50%;
    background: rgba(13,15,18,.82);
    box-shadow: inset 0 0 40px rgba(0,0,0,.6);
  }
  .arc-grain {
    position: absolute; inset: 0;
    border-radius: 50% 50% 46% 54% / 58% 58% 42% 42%;
    transform: rotate(-12deg);
    background-image: radial-gradient(rgba(255,255,255,.22) 1px, transparent 1px);
    background-size: 5px 5px;
    mix-blend-mode: overlay;
    opacity: .5;
    pointer-events: none;
  }
  .play-badge {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 74px; height: 74px; border-radius: 50%;
    background: linear-gradient(145deg, #ffffff, #d7dee2);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 10px 30px rgba(0,0,0,.55), inset 0 -2px 6px rgba(0,0,0,.18);
    z-index: 2;
  }
  .play-badge::before {
    content: ""; display: block; margin-left: 5px;
    width: 0; height: 0;
    border-left: 22px solid var(--melon-deep);
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
  }
  .poster-float {
    position: absolute; width: 108px; border-radius: 8px; overflow: hidden;
    border: 1px solid rgba(255,255,255,.14);
    box-shadow: 0 16px 34px rgba(0,0,0,.6);
  }
  .poster-float img { width: 100%; height: 144px; object-fit: cover; }
  .pf-a { left: -12px; bottom: 0; transform: rotate(-7deg); }
  .pf-b { right: -8px; top: 4px; transform: rotate(8deg); }

  /* ===== section shell ===== */
  section { padding: 64px 0; }
  .sec-head { margin-bottom: 30px; }
  .sec-kicker {
    display: inline-block; font-size: 12.5px; letter-spacing: 1.5px;
    color: var(--melon); font-weight: 600; margin-bottom: 8px;
  }
  .sec-head h2 { font-size: 26px; font-weight: 800; letter-spacing: -.3px; }
  .sec-head p { color: var(--ink-dim); font-size: 15px; margin-top: 8px; max-width: 640px; }

  /* ===== grid of posters ===== */
  .poster-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
  }
  .poster-card {
    background: var(--card); border-radius: var(--radius);
    border: 1px solid var(--line); overflow: hidden;
    transition: transform .22s, border-color .22s;
  }
  .poster-card:hover { transform: translateY(-4px); border-color: rgba(244,80,107,.5); }
  .poster-card .thumb {
    position: relative; width: 100%; aspect-ratio: 3 / 4; background: #20262e; overflow: hidden;
  }
  .poster-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
  .poster-card .tag {
    position: absolute; left: 8px; top: 8px;
    font-size: 11px; padding: 3px 9px; border-radius: 999px;
    background: rgba(13,15,18,.72); color: var(--white);
    backdrop-filter: blur(4px);
  }
  .poster-card .body { padding: 12px 12px 14px; }
  .poster-card h3 { font-size: 15px; font-weight: 700; line-height: 1.4; }
  .poster-card .meta { font-size: 12.5px; color: var(--ink-faint); margin-top: 5px; }
  .poster-card .desc { font-size: 13px; color: var(--ink-dim); margin-top: 7px; }

  /* ===== wide feature ===== */
  .wide-list { display: grid; gap: 18px; }
  .wide-item {
    display: grid; grid-template-columns: 1fr; gap: 0;
    background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  }
  .wide-item .wide-thumb { aspect-ratio: 16 / 9; overflow: hidden; background: #20262e; }
  .wide-item .wide-thumb img { width: 100%; height: 100%; object-fit: cover; }
  .wide-item .wide-body { padding: 18px 18px 20px; }
  .wide-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
  .wide-item .wide-label { font-size: 12px; color: var(--leaf); letter-spacing: 1px; margin-bottom: 6px; }
  .wide-item p { color: var(--ink-dim); font-size: 14px; }

  /* ===== irregular collection ===== */
  .collection {
    display: grid; grid-template-columns: 1fr; gap: 20px;
  }
  .col-card {
    position: relative; overflow: hidden; border-radius: 15px;
    border: 1px solid var(--line); background: var(--card);
    display: grid; grid-template-columns: 116px 1fr; min-height: 150px;
  }
  .col-card:nth-child(1) { border-radius: 34px 15px 34px 15px; }
  .col-card:nth-child(2) { border-radius: 15px 34px 15px 34px; }
  .col-card:nth-child(3) { border-radius: 24px 24px 8px 8px; }
  .col-card:nth-child(4) { border-radius: 8px 8px 24px 24px; }
  .col-card .col-img { width: 100%; height: 100%; object-fit: cover; }
  .col-card .col-text { padding: 18px 18px 18px 16px; }
  .col-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
  .col-card p { font-size: 13.5px; color: var(--ink-dim); }
  .col-card .col-count { font-size: 12px; color: var(--ink-faint); margin-top: 10px; }

  /* ===== features ===== */
  .feature-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
  .feature-card {
    background: linear-gradient(160deg, #1b2229, #151a20);
    border: 1px solid var(--line); padding: 24px 20px;
    border-radius: 18px;
  }
  .feature-card:nth-child(odd) { border-radius: 28px 12px 28px 12px; }
  .feature-card:nth-child(even) { border-radius: 12px 28px 12px 28px; }
  .feature-icon {
    width: 42px; height: 42px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 19px; margin-bottom: 14px;
    background: rgba(244,80,107,.12); color: var(--melon);
  }
  .feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 7px; }
  .feature-card p { font-size: 14px; color: var(--ink-dim); }

  /* ===== reviews ===== */
  .review-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
  .review-card {
    background: var(--card); border: 1px solid var(--line);
    border-radius: 16px; padding: 20px;
  }
  .review-card .stars { color: var(--melon); font-size: 13px; letter-spacing: 2px; margin-bottom: 10px; }
  .review-card p { font-size: 14px; color: var(--ink); }
  .review-card .who { margin-top: 12px; font-size: 12.5px; color: var(--ink-faint); }

  /* ===== faq ===== */
  .faq-list { display: grid; gap: 12px; }
  .faq-item {
    background: var(--bg-soft); border: 1px solid var(--line);
    border-radius: 12px; padding: 18px 20px;
  }
  .faq-item h3 { font-size: 15.5px; font-weight: 700; margin-bottom: 7px; color: var(--ink); }
  .faq-item p { font-size: 14px; color: var(--ink-dim); }

  /* ===== download ===== */
  .download {
    background:
      radial-gradient(ellipse 70% 90% at 50% 0%, rgba(244,80,107,.18), transparent 70%),
      var(--bg-soft);
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
    text-align: center;
  }
  .download h2 { font-size: 27px; font-weight: 800; margin-bottom: 12px; }
  .download p { color: var(--ink-dim); font-size: 15px; max-width: 520px; margin: 0 auto 26px; }
  .dl-note { margin-top: 16px; font-size: 12.5px; color: var(--ink-faint); }

  /* ===== screenshot wall ===== */
  .wall {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  }
  .wall figure { border-radius: 10px; overflow: hidden; background: #20262e; aspect-ratio: 3/4; }
  .wall img { width: 100%; height: 100%; object-fit: cover; }
  .wall figure:nth-child(4n+1) { border-radius: 20px 8px 20px 8px; }
  .wall figure:nth-child(4n+3) { border-radius: 8px 20px 8px 20px; }

  /* ===== footer ===== */
  .site-footer {
    padding: 34px 0 42px; border-top: 1px solid var(--line);
    font-size: 12.5px; color: var(--ink-faint);
  }
  .footer-inner { display: flex; flex-direction: column; gap: 8px; }
  .site-footer a { color: var(--ink-faint); }
  .site-footer a:hover { color: var(--ink-dim); }
  .footer-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; color: var(--ink-dim); font-size: 13px; }
  .footer-brand img { height: 20px; width: auto; opacity: .8; }

  /* ===== breakpoints ===== */
  @media (min-width: 768px) {
    .hero { padding: 76px 0 88px; }
    .hero-inner { grid-template-columns: 1.05fr .95fr; gap: 30px; }
    .hero-copy h1 { font-size: 44px; }
    .hero-visual { height: 420px; }
    .arc-scene { max-width: 460px; height: 420px; }
    .poster-float { width: 138px; }
    .poster-float img { height: 184px; }
    .poster-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .collection { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .wide-item { grid-template-columns: 300px 1fr; }
    .wide-item .wide-thumb { aspect-ratio: auto; height: 100%; min-height: 190px; }
    .wide-item .wide-body { padding: 26px 28px; }
    .wall { grid-template-columns: repeat(4, 1fr); gap: 14px; }
    section { padding: 76px 0; }
  }

  @media (min-width: 1024px) {
    .hero-copy h1 { font-size: 52px; }
    .poster-grid { grid-template-columns: repeat(4, 1fr); }
    .collection { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .feature-grid { grid-template-columns: repeat(4, 1fr); }
    .review-grid { grid-template-columns: repeat(3, 1fr); }
    .wall { grid-template-columns: repeat(5, 1fr); }
    .nav { gap: 30px; }
  }