:root {
    --bg-dark: #0d0f14;
    --bg-card: #171a22;
    --bg-elevated: #1e222d;
    --text-main: #f2f4f8;
    --text-sub: #9aa3b2;
    --accent: #ff5e3a;
    --accent-glow: rgba(255, 94, 58, 0.4);
    --purple: #8b5cf6;
    --border: #2a2f3d;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  body {
    font-family: var(--font);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

  ul {
    list-style: none;
  }

  /* === Header === */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 15, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
  }

  .brand img {
    height: 36px;
    width: auto;
    border-radius: 6px;
  }

  .nav-links {
    display: none;
    gap: 24px;
    font-size: 14px;
    color: var(--text-sub);
  }

  .nav-links a:hover {
    color: var(--text-main);
  }

  /* === Hero === */
  .hero {
    position: relative;
    padding: 80px 24px 60px;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
  }

  .hero-bg-glow {
    position: absolute;
    top: -20%;
    left: 10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    z-index: -1;
    filter: blur(80px);
    pointer-events: none;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .hero-tag {
    display: inline-block;
    background: rgba(255, 94, 58, 0.15);
    color: var(--accent);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    width: fit-content;
    border: 1px solid rgba(255, 94, 58, 0.3);
  }

  h1 {
    font-size: 36px;
    line-height: 1.2;
    font-weight: 800;
  }

  h1 span {
    background: linear-gradient(135deg, #ff5e3a, #ffb347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-desc {
    font-size: 16px;
    color: var(--text-sub);
    max-width: 500px;
  }

  .download-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 10px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    min-width: 160px;
  }

  .btn:active {
    transform: scale(0.97);
  }

  .btn-primary {
    background: linear-gradient(135deg, #ff5e3a, #ff8a4c);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 94, 58, 0.4);
  }

  .btn-primary:hover {
    box-shadow: 0 6px 24px rgba(255, 94, 58, 0.6);
  }

  .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border);
  }

  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 20px;
  }

  .hero-poster {
    width: 140px;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: rotate(-6deg) translateY(10px);
    transition: transform 0.3s;
  }

  .hero-poster:nth-child(2) {
    width: 160px;
    height: 230px;
    transform: rotate(0deg) translateY(-10px);
    z-index: 2;
    border: 2px solid var(--accent);
  }

  .hero-poster:nth-child(3) {
    transform: rotate(6deg) translateY(10px);
  }

  .hero-poster:hover {
    transform: scale(1.05) rotate(0deg) translateY(0);
    z-index: 10;
  }

  /* === Common Section Styles === */
  section {
    padding: 60px 24px;
    max-width: 1200px;
    margin: 0 auto;
  }

  .section-header {
    margin-bottom: 40px;
    text-align: center;
  }

  .section-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
  }

  .section-header p {
    color: var(--text-sub);
    font-size: 15px;
  }

  /* === AI短剧 Section === */
  .ai-section {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #131722 100%);
    border-radius: var(--radius-lg);
    margin: 0 24px;
    max-width: 1152px;
    padding: 60px 24px;
  }

  .ai-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .ai-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, border-color 0.2s;
  }

  .ai-card:hover {
    transform: translateY(-4px);
    border-color: var(--purple);
  }

  .ai-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }

  .ai-card-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .ai-card h3 {
    font-size: 18px;
    font-weight: 700;
  }

  .ai-card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }

  .tag {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
  }

  .ai-card-meta {
    font-size: 13px;
    color: var(--text-sub);
    margin-top: auto;
  }

  /* === 短剧热播 Section === */
  .hot-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .hot-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 3/4;
    cursor: pointer;
  }

  .hot-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
  }

  .hot-card:hover img {
    transform: scale(1.05);
  }

  .hot-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, transparent 100%);
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .hot-card-title {
    font-size: 16px;
    font-weight: 700;
  }

  .hot-card-info {
    font-size: 12px;
    color: var(--text-sub);
    display: flex;
    justify-content: space-between;
  }

  /* === 安装步骤 === */
  .steps-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
  }

  .steps-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .step-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
  }

  .step-num {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 94, 58, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    border: 1px solid rgba(255, 94, 58, 0.3);
  }

  .step-text h3 {
    font-size: 18px;
    margin-bottom: 8px;
  }

  .step-text p {
    font-size: 14px;
    color: var(--text-sub);
  }

  /* === 常见问题 & 隐私安全 (FAQ) === */
  .faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .faq-item {
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border);
  }

  .faq-q {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .faq-q::before {
    content: "Q";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    border-radius: 4px;
  }

  .faq-a {
    font-size: 14px;
    color: var(--text-sub);
    display: flex;
    gap: 10px;
  }

  .faq-a::before {
    content: "A";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    font-size: 12px;
    border-radius: 4px;
  }

  /* === 用户热评 === */
  .reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .review-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    position: relative;
  }

  .review-card::after {
    content: "”";
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 60px;
    color: rgba(255, 255, 255, 0.05);
    font-family: serif;
    line-height: 1;
  }

  .review-user {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
  }

  .user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
  }

  .user-name {
    font-weight: 600;
    font-size: 15px;
  }

  .review-text {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
  }

  /* === 创作者计划 & 交流社区 === */
  .feature-split {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-box {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-elevated));
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
  }

  .feature-box h3 {
    font-size: 22px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .feature-box h3 span {
    color: var(--accent);
  }

  .feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--text-sub);
  }

  .feature-list li::before {
    content: "•";
    color: var(--accent);
    font-weight: bold;
    font-size: 20px;
    line-height: 1;
  }

  /* === 底部下载区 === */
  .bottom-download {
    text-align: center;
    padding: 80px 24px;
    background: radial-gradient(circle at center, rgba(255, 94, 58, 0.1) 0%, transparent 60%);
    border-top: 1px solid var(--border);
    margin-top: 40px;
  }

  .bottom-download h2 {
    font-size: 32px;
    margin-bottom: 16px;
  }

  .bottom-download p {
    color: var(--text-sub);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .bottom-download .download-group {
    justify-content: center;
  }

  /* === Footer === */
  .site-footer {
    text-align: center;
    padding: 32px 24px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-sub);
  }

  .site-footer p {
    margin-bottom: 8px;
  }

  .site-footer a {
    color: var(--text-sub);
    text-decoration: underline;
  }

  .site-footer a:hover {
    color: var(--text-main);
  }

  .footer-time {
    font-size: 12px;
    opacity: 0.7;
  }

  /* === Media Queries === */
  @media (min-width: 768px) {
    .header-inner {
      height: 72px;
    }
    .nav-links {
      display: flex;
    }
    .hero {
      grid-template-columns: 1fr 1fr;
      padding: 100px 24px 80px;
    }
    h1 {
      font-size: 48px;
    }
    .hero-poster {
      width: 180px;
      height: 260px;
    }
    .hero-poster:nth-child(2) {
      width: 220px;
      height: 320px;
    }
    .ai-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .hot-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    .steps-container {
      grid-template-columns: repeat(2, 1fr);
    }
    .faq-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .reviews-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .feature-split {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 1024px) {
    h1 {
      font-size: 56px;
    }
    .ai-grid {
      grid-template-columns: repeat(3, 1fr);
    }
    .hot-grid {
      grid-template-columns: repeat(5, 1fr);
    }
    .steps-container {
      grid-template-columns: repeat(4, 1fr);
    }
    .reviews-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }