:root {
    --bg-dark: #0a0a0e;
    --bg-card: #14141c;
    --bg-card-hover: #1c1c28;
    --primary: #f5c518;
    --primary-hover: #ffd84d;
    --text-main: #f0f0f4;
    --text-sub: #9a9aac;
    --border: #2a2a3a;
    --gradient: linear-gradient(135deg, #f5c518 0%, #ff8a00 100%);
    --radius: 16px;
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
  }

  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  ul { list-style: none; }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  /* Header */
  header {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(10, 10, 14, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    height: 64px;
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
  }

  .logo-area img {
    height: 32px;
    width: auto;
    border-radius: 8px;
  }

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

  .nav-links a { transition: color 0.3s; }
  .nav-links a:hover { color: var(--primary); }

  .mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
  }

  /* Hero */
  .hero {
    padding: 100px 0 60px;
    background: radial-gradient(circle at 10% 20%, rgba(245, 197, 24, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 90% 80%, rgba(255, 138, 0, 0.06) 0%, transparent 50%);
    position: relative;
    overflow: hidden;
  }

  .hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
  }

  .hero-tag {
    display: inline-block;
    background: rgba(245, 197, 24, 0.12);
    color: var(--primary);
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid rgba(245, 197, 24, 0.3);
    margin-bottom: 20px;
    font-weight: 500;
  }

  .hero h1 {
    font-size: 32px;
    line-height: 1.25;
    margin-bottom: 16px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero p {
    font-size: 15px;
    color: var(--text-sub);
    max-width: 600px;
    margin: 0 auto 32px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
  }

  .btn-primary {
    background: var(--gradient);
    color: #000;
    box-shadow: 0 4px 15px rgba(245, 197, 24, 0.3);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 197, 24, 0.5);
  }

  .btn-secondary {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border);
  }

  .btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
  }

  .hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 48px;
    flex-wrap: wrap;
  }

  .stat-item {
    text-align: center;
  }

  .stat-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
  }

  .stat-label {
    font-size: 13px;
    color: var(--text-sub);
    margin-top: 4px;
  }

  /* Section General */
  section {
    padding: 60px 0;
  }

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

  .section-header h2 {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 12px;
  }

  .section-header p {
    font-size: 14px;
    color: var(--text-sub);
    max-width: 500px;
    margin: 0 auto;
  }

  /* AI Zone */
  .ai-zone {
    background: var(--bg-dark);
  }

  .ai-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .ai-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
  }

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

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

  .ai-card-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
  }

  .ai-card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .ai-card-desc {
    font-size: 13px;
    color: var(--text-sub);
    margin-bottom: 12px;
    flex-grow: 1;
  }

  .ai-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-sub);
  }

  .tag {
    background: rgba(245, 197, 24, 0.15);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
  }

  /* Hot Zone */
  .hot-zone {
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0d0d14 100%);
  }

  .hot-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .hot-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
  }

  .hot-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
  }

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

  .hot-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0,0,0,0.9));
  }

  .hot-overlay h3 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
  }

  .hot-overlay span {
    font-size: 11px;
    color: var(--text-sub);
  }

  /* Install Steps */
  .install-steps {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px 24px;
    border: 1px solid var(--border);
  }

  .step-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .step-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
  }

  .step-num {
    width: 32px;
    height: 32px;
    background: var(--gradient);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    flex-shrink: 0;
    font-size: 14px;
  }

  .step-text h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
  }

  .step-text p {
    font-size: 13px;
    color: var(--text-sub);
  }

  /* FAQ */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    transition: border-color 0.3s;
  }

  .faq-item:hover {
    border-color: var(--primary);
  }

  .faq-q {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
  }

  .faq-a {
    font-size: 13px;
    color: var(--text-sub);
  }

  /* Reviews */
  .review-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .review-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
  }

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

  .review-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #000;
    font-size: 16px;
  }

  .review-name {
    font-size: 14px;
    font-weight: 600;
  }

  .review-stars {
    font-size: 12px;
    color: var(--primary);
  }

  .review-text {
    font-size: 13px;
    color: var(--text-sub);
    font-style: italic;
  }

  /* Privacy */
  .privacy-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .privacy-item {
    display: flex;
    gap: 16px;
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
  }

  .privacy-icon {
    font-size: 24px;
    flex-shrink: 0;
  }

  .privacy-text h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .privacy-text p {
    font-size: 13px;
    color: var(--text-sub);
  }

  /* Creator */
  .creator-banner {
    background: var(--gradient);
    border-radius: var(--radius);
    padding: 32px 24px;
    color: #000;
    text-align: center;
  }

  .creator-banner h2 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
  }

  .creator-banner p {
    font-size: 14px;
    margin-bottom: 20px;
    opacity: 0.8;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .creator-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 24px;
    text-align: left;
  }

  .creator-feat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    background: rgba(0,0,0,0.1);
    padding: 12px 16px;
    border-radius: 8px;
  }

  /* Community */
  .community-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .community-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: border-color 0.3s;
  }

  .community-card:hover {
    border-color: var(--primary);
  }

  .community-card h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .community-card p {
    font-size: 13px;
    color: var(--text-sub);
  }

  /* Download */
  .download-area {
    text-align: center;
    padding: 60px 0;
    background: radial-gradient(circle at 50% 50%, rgba(245, 197, 24, 0.1) 0%, transparent 60%);
  }

  .download-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
  }

  /* Footer */
  footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    font-size: 12px;
    color: var(--text-sub);
  }

  footer p { margin-bottom: 8px; }

  /* Responsive */
  @media (min-width: 768px) {
    .nav-links { display: flex; }
    .mobile-menu-btn { display: none; }

    .hero h1 { font-size: 44px; }
    .hero p { font-size: 16px; }

    .ai-grid { grid-template-columns: repeat(2, 1fr); }
    .hot-grid { grid-template-columns: repeat(3, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .privacy-grid { grid-template-columns: repeat(2, 1fr); }
    .creator-features { grid-template-columns: repeat(2, 1fr); }
    .community-links { grid-template-columns: repeat(3, 1fr); }

    .hot-item img { height: 260px; }
  }

  @media (min-width: 1024px) {
    .hero h1 { font-size: 56px; }
    .hero p { font-size: 18px; }

    .ai-grid { grid-template-columns: repeat(3, 1fr); }
    .hot-grid { grid-template-columns: repeat(4, 1fr); }
    .review-grid { grid-template-columns: repeat(3, 1fr); }
    .privacy-grid { grid-template-columns: repeat(3, 1fr); }
    .creator-features { grid-template-columns: repeat(3, 1fr); }
  }