:root {
    --bg-deep: #0b0d17;
    --bg-card: #151827;
    --bg-card-2: #1c2033;
    --line: rgba(255,255,255,0.09);
    --text: #eef0f8;
    --text-dim: #a6abc2;
    --accent: #ff5b7f;
    --accent-2: #8b6cff;
    --accent-3: #46e6c8;
    --radius: 16px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  body {
    background: var(--bg-deep);
    color: var(--text);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    line-height: 1.7;
    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; }

  /* ---------- header ---------- */
  .site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(11,13,23,0.86);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    display: flex; align-items: center; gap: 18px;
    min-height: 62px;
  }
  .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .brand img { height: 34px; width: auto; border-radius: 8px; }
  .brand-name { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
  .nav-toggle {
    margin-left: auto; display: none;
    background: transparent; border: 1px solid var(--line);
    color: var(--text); border-radius: 9px; padding: 6px 12px;
    font-size: 14px; cursor: pointer;
  }
  .main-nav { margin-left: auto; }
  .main-nav ul {
    list-style: none; display: flex; flex-wrap: wrap; gap: 4px 18px;
  }
  .main-nav a {
    font-size: 14px; color: var(--text-dim); padding: 4px 0;
    transition: color .2s;
  }
  .main-nav a:hover { color: var(--text); }

  /* ---------- hero ---------- */
  .hero {
    position: relative; overflow: hidden;
    padding: 70px 0 60px;
    background:
      radial-gradient(900px 400px at 12% 0%, rgba(139,108,255,0.26), transparent 65%),
      radial-gradient(700px 380px at 92% 20%, rgba(255,91,127,0.22), transparent 62%),
      radial-gradient(600px 400px at 50% 110%, rgba(70,230,200,0.12), transparent 65%);
  }
  .hero-grid {
    display: grid; grid-template-columns: 1.05fr .95fr;
    gap: 48px; align-items: center;
  }
  .hero-tag {
    display: inline-block; font-size: 13px; letter-spacing: 1px;
    color: var(--accent-3); border: 1px solid rgba(70,230,200,0.35);
    background: rgba(70,230,200,0.08);
    padding: 4px 14px; border-radius: 999px; margin-bottom: 20px;
  }
  .hero h1 {
    font-size: clamp(30px, 4.6vw, 50px);
    line-height: 1.22; font-weight: 800; letter-spacing: -.5px;
  }
  .hero h1 em {
    font-style: normal;
    background: linear-gradient(96deg, var(--accent), var(--accent-2) 60%, var(--accent-3));
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .hero-lead {
    margin-top: 20px; color: var(--text-dim); font-size: 16px; max-width: 540px;
  }
  .hero-stats {
    display: flex; flex-wrap: wrap; gap: 12px 30px; margin-top: 26px;
  }
  .hero-stats div { font-size: 13px; color: var(--text-dim); }
  .hero-stats strong {
    display: block; font-size: 17px; color: var(--text); font-weight: 700;
  }

  /* download buttons */
  .download-group { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
  .btn {
    display: inline-flex; align-items: center; gap: 9px;
    padding: 12px 22px; border-radius: 999px;
    font-size: 14.5px; font-weight: 600; cursor: pointer;
    border: 1px solid transparent; transition: transform .18s, box-shadow .18s, background .18s;
  }
  .btn:hover { transform: translateY(-2px); }
  .btn-primary {
    background: linear-gradient(96deg, var(--accent), var(--accent-2));
    color: #fff; box-shadow: 0 10px 26px -10px rgba(255,91,127,0.8);
  }
  .btn-ghost {
    background: rgba(255,255,255,0.05);
    border-color: var(--line); color: var(--text);
  }
  .btn-ghost:hover { background: rgba(255,255,255,0.1); }
  .btn-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--accent-3); flex-shrink: 0;
  }

  .hero-collage {
    position: relative; display: grid;
    grid-template-columns: repeat(3, 1fr); gap: 12px;
  }
  .hero-collage figure {
    border-radius: 14px; overflow: hidden;
    border: 1px solid var(--line);
    background: var(--bg-card);
    box-shadow: 0 20px 40px -28px rgba(0,0,0,0.9);
  }
  .hero-collage img {
    width: 100%; height: 100%; aspect-ratio: 3 / 4; object-fit: cover;
  }
  .hero-collage figure:nth-child(2) { transform: translateY(24px); }
  .hero-collage figure:nth-child(5) { transform: translateY(-18px); }

  /* ---------- generic section ---------- */
  .section { padding: 68px 0; }
  .section-alt {
    background: linear-gradient(180deg, rgba(255,255,255,0.028), rgba(255,255,255,0));
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  }
  .sec-head { margin-bottom: 34px; max-width: 680px; }
  .sec-eyebrow {
    font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
    color: var(--accent-3); margin-bottom: 10px;
  }
  .sec-head h2 {
    font-size: clamp(23px, 3vw, 32px); font-weight: 800; line-height: 1.3;
  }
  .sec-head p { margin-top: 12px; color: var(--text-dim); font-size: 15px; }

  /* ---------- AI 短剧 展示 ---------- */
  .poster-grid {
    display: grid; gap: 20px;
    grid-template-columns: repeat(4, 1fr);
  }
  .poster-card {
    background: var(--bg-card); border: 1px solid var(--line);
    border-radius: var(--radius); overflow: hidden;
    display: flex; flex-direction: column;
    transition: transform .22s, border-color .22s;
  }
  .poster-card:hover { transform: translateY(-5px); border-color: rgba(255,91,127,0.45); }
  .poster-thumb { position: relative; }
  .poster-thumb img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
  .poster-date {
    position: absolute; left: 10px; top: 10px;
    font-size: 11px; padding: 3px 9px; border-radius: 999px;
    background: rgba(11,13,23,0.78); color: var(--accent-3);
    border: 1px solid rgba(70,230,200,0.3);
  }
  .poster-body { padding: 14px 15px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
  .poster-body h3 { font-size: 15.5px; font-weight: 700; }
  .poster-body p { font-size: 13px; color: var(--text-dim); line-height: 1.6; flex: 1; }
  .tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
  .tag {
    font-size: 11px; color: var(--accent);
    border: 1px solid rgba(255,91,127,0.32);
    background: rgba(255,91,127,0.08);
    padding: 2px 8px; border-radius: 6px;
  }

  /* ---------- 热播 横向区 ---------- */
  .hot-scroll {
    display: grid; gap: 16px; overflow-x: auto; padding-bottom: 10px;
    grid-auto-flow: column; grid-auto-columns: 210px;
    scrollbar-width: thin;
  }
  .hot-scroll::-webkit-scrollbar { height: 6px; }
  .hot-scroll::-webkit-scrollbar-thumb { background: #2c3149; border-radius: 99px; }
  .hot-item {
    border-radius: 14px; overflow: hidden; background: var(--bg-card);
    border: 1px solid var(--line);
  }
  .hot-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
  .hot-item figcaption { padding: 12px 14px; }
  .hot-item figcaption strong { display: block; font-size: 14.5px; margin-bottom: 4px; }
  .hot-item figcaption span { font-size: 12px; color: var(--text-dim); }

  /* ---------- 步骤 ---------- */
  .steps {
    display: grid; gap: 18px;
    grid-template-columns: repeat(4, 1fr); counter-reset: step;
  }
  .step-card {
    position: relative; padding: 26px 22px 24px;
    background: var(--bg-card); border: 1px solid var(--line);
    border-radius: var(--radius);
  }
  .step-card::before {
    counter-increment: step; content: "0" counter(step);
    font-size: 30px; font-weight: 800; line-height: 1;
    background: linear-gradient(120deg, var(--accent-2), var(--accent));
    -webkit-background-clip: text; background-clip: text; color: transparent;
    display: block; margin-bottom: 14px;
  }
  .step-card h3 { font-size: 16px; margin-bottom: 8px; }
  .step-card p { font-size: 13.5px; color: var(--text-dim); }

  /* ---------- 问答 ---------- */
  .qa-grid { display: grid; gap: 16px; grid-template-columns: repeat(2, 1fr); }
  .qa-item {
    background: var(--bg-card); border: 1px solid var(--line);
    border-radius: 13px; padding: 18px 20px;
    border-left: 3px solid rgba(139,108,255,0.6);
  }
  .qa-item h3 { font-size: 15px; margin-bottom: 8px; }
  .qa-item h3::before { content: "Q "; color: var(--accent-3); font-weight: 800; }
  .qa-item p { font-size: 13.5px; color: var(--text-dim); }
  .qa-item p::before { content: "A "; color: var(--accent); font-weight: 700; }

  /* ---------- 用户热评 ---------- */
  .review-grid { display: grid; gap: 16px; grid-template-columns: repeat(3, 1fr); }
  .review-card {
    background: linear-gradient(160deg, var(--bg-card-2), var(--bg-card));
    border: 1px solid var(--line); border-radius: 14px; padding: 20px;
    display: flex; flex-direction: column; gap: 10px;
  }
  .review-meta { display: flex; align-items: center; gap: 10px; }
  .avatar {
    width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
    display: grid; place-items: center; font-size: 13px; font-weight: 700;
    background: linear-gradient(135deg, var(--accent-2), var(--accent));
    color: #fff;
  }
  .review-meta strong { font-size: 14px; display: block; }
  .review-meta span { font-size: 11.5px; color: var(--text-dim); }
  .review-card p { font-size: 13.5px; color: #cdd2e4; }
  .stars { color: #ffc861; font-size: 12px; letter-spacing: 2px; }

  /* ---------- 隐私 ---------- */
  .privacy-layout {
    display: grid; grid-template-columns: .9fr 1.1fr; gap: 34px; align-items: start;
  }
  .privacy-visual {
    border-radius: var(--radius); overflow: hidden;
    border: 1px solid var(--line); position: relative;
  }
  .privacy-visual img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
  .privacy-badge {
    position: absolute; left: 16px; right: 16px; bottom: 16px;
    background: rgba(11,13,23,0.86); border: 1px solid var(--line);
    border-radius: 12px; padding: 14px 16px; font-size: 13px; color: var(--text-dim);
  }
  .privacy-badge strong { display: block; color: var(--accent-3); font-size: 14px; margin-bottom: 4px; }
  .privacy-list { display: grid; gap: 14px; }
  .privacy-list .qa-item { border-left-color: rgba(70,230,200,0.6); }

  /* ---------- 创作者 & 社区 ---------- */
  .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
  .panel {
    background: var(--bg-card); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 28px 26px;
  }
  .panel h2 { font-size: 22px; margin-bottom: 10px; }
  .panel > p { font-size: 14px; color: var(--text-dim); margin-bottom: 20px; }
  .panel ul { list-style: none; display: grid; gap: 12px; }
  .panel li {
    display: flex; gap: 10px; font-size: 13.5px; color: #cdd2e4;
    padding-bottom: 12px; border-bottom: 1px dashed rgba(255,255,255,0.08);
  }
  .panel li:last-child { border-bottom: 0; padding-bottom: 0; }
  .panel li b { color: var(--accent-3); font-weight: 700; flex-shrink: 0; }

  /* ---------- CTA ---------- */
  .cta-band {
    background:
      radial-gradient(600px 260px at 15% 0%, rgba(139,108,255,0.3), transparent 65%),
      radial-gradient(600px 260px at 85% 100%, rgba(255,91,127,0.26), transparent 65%),
      linear-gradient(160deg, #161a2b, #0e101b);
    border-top: 1px solid var(--line);
  }
  .cta-inner {
    display: grid; grid-template-columns: 1.15fr .85fr; gap: 36px; align-items: center;
  }
  .cta-inner h2 { font-size: clamp(23px, 3vw, 31px); margin-bottom: 14px; }
  .cta-inner p { color: var(--text-dim); font-size: 14.5px; margin-bottom: 12px; }
  .cta-shot {
    border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
    box-shadow: 0 30px 60px -30px rgba(0,0,0,0.9);
  }
  .cta-shot img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
  .device-list {
    display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px;
  }
  .device-list .btn { padding: 10px 18px; font-size: 13.5px; }

  /* ---------- footer ---------- */
  .site-footer {
    border-top: 1px solid var(--line); padding: 40px 0 32px;
    background: #080a11;
  }
  .footer-top {
    display: flex; flex-wrap: wrap; gap: 28px; justify-content: space-between;
    align-items: flex-start; margin-bottom: 26px;
  }
  .footer-brand { display: flex; align-items: center; gap: 10px; }
  .footer-brand img { height: 30px; border-radius: 7px; }
  .footer-brand span { font-size: 15px; font-weight: 700; }
  .footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
  .footer-nav a { font-size: 13px; color: var(--text-dim); }
  .footer-nav a:hover { color: var(--text); }
  .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: 12.5px; color: #6f7590;
  }
  .footer-bottom time { color: #7d83a0; }

  /* ---------- responsive ---------- */
  @media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 36px; }
    .hero-collage { max-width: 560px; }
    .poster-grid { grid-template-columns: repeat(3, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .privacy-layout { grid-template-columns: 1fr; }
    .privacy-visual { max-width: 460px; }
    .cta-inner { grid-template-columns: 1fr; }
    .cta-shot { max-width: 420px; }
  }
  @media (max-width: 768px) {
    .section { padding: 48px 0; }
    .hero { padding: 46px 0 44px; }
    .nav-toggle { display: inline-block; }
    .main-nav {
      display: none; width: 100%; margin: 0 0 14px;
    }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 2px; }
    .main-nav a { display: block; padding: 9px 4px; border-bottom: 1px solid var(--line); }
    .header-inner { flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
    .poster-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .qa-grid, .review-grid, .two-col { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .download-group .btn { flex: 1 1 auto; justify-content: center; }
    .hero-collage { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .hero-collage figure:nth-child(4),
    .hero-collage figure:nth-child(5),
    .hero-collage figure:nth-child(6) { display: none; }
    .hero-collage figure:nth-child(2) { transform: none; }
    .hot-scroll { grid-auto-columns: 165px; }
    .footer-top { flex-direction: column; gap: 18px; }
  }
  @media (max-width: 400px) {
    .poster-grid { grid-template-columns: 1fr; }
  }