/* ==================== Content Sections ==================== */
  .content-section { position: relative; z-index: 1; padding: 80px 0; }
  .content-section:nth-child(even) { background: var(--bg-secondary); }
  .section-header { margin-bottom: 40px; display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
  .section-header h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.5px; }
  .section-header p { font-size: 1rem; color: var(--text-secondary); margin-top: 6px; }
  .section-header .view-all { font-size: 0.88rem; font-weight: 600; color: var(--accent-2); transition: var(--transition); white-space: nowrap; }
  .sub-cats { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
  .sub-cat-pill { padding: 6px 16px; border-radius: 50px; font-size: 0.82rem; font-weight: 600; border: 1px solid rgba(255,255,255,0.08); color: var(--text-secondary); background: transparent; cursor: pointer; transition: var(--transition); }
  .sub-cat-pill:hover, .sub-cat-pill.active { background: rgba(108,92,231,0.15); border-color: rgba(108,92,231,0.4); color: var(--text-primary); }
  
  /* Base Card Grid */
  .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; min-height: 200px; }
  .card-link { display: block; text-decoration: none; color: inherit; }
  .card { background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease; cursor: pointer; animation: cardFadeIn 0.4s ease forwards; height: 100%; }
  @keyframes cardFadeIn { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
  .card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.3); border-color: rgba(108,92,231,0.3); }
  .card-body { padding: 20px; }
  .card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
  .card-body p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .card-meta { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--text-secondary); }
  .card-tag { position: absolute; top: 10px; left: 10px; padding: 3px 12px; border-radius: 6px; font-size: 0.75rem; font-weight: 700; color: #fff; z-index: 2; }
  .tag-beginner { background: rgba(0,206,201,0.85); }
  .tag-intermediate { background: rgba(108,92,231,0.85); }
  .tag-advanced { background: rgba(253,121,168,0.85); }

  .card-thumb { width: 100%; aspect-ratio: 16/9; position: relative; overflow: hidden; }
  .card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
  .card:hover .card-thumb img { transform: scale(1.1); }

  .card-img2img { overflow: hidden; border-radius: var(--radius); transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease; }
  .card-img2img:hover { transform: translateY(-8px); box-shadow: 0 20px 50px rgba(108,92,231,0.25); }
  .slider-container { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; cursor: ew-resize; user-select: none; transition: transform 0.4s ease; }
  .card-img2img:hover .slider-container { transform: scale(1.05); }
  .slider-container::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 50%; background: linear-gradient(to top, rgba(0,0,0,0.5), transparent); z-index: 4; pointer-events: none; opacity: 0; transition: opacity 0.3s ease; }
  .card-img2img:hover .slider-container::after { opacity: 1; }
  .slider-img { position: absolute; inset: 0; background-size: cover; background-position: center; }
  .slider-img-before { z-index: 1; }
  .slider-img-after { z-index: 2; clip-path: inset(0 0 0 50%); transition: clip-path 0.05s linear; }
  .slider-line { position: absolute; top: 0; bottom: 0; width: 2px; left: 50%; transform: translateX(-50%); background: rgba(255, 255, 255, 0.85); z-index: 5; box-shadow: 0 0 8px rgba(255,255,255,0.4), 0 0 4px rgba(0,0,0,0.5); transition: left 0.05s linear; pointer-events: none; }
  .slider-tags { position: absolute; bottom: 12px; right: 12px; display: flex; gap: 6px; z-index: 6; pointer-events: none; }
  .slider-tag { padding: 4px 10px; border-radius: 6px; font-size: 0.7rem; font-weight: 600; background: rgba(0, 0, 0, 0.5); color: #fff; backdrop-filter: blur(6px); border: 1px solid rgba(255, 255, 255, 0.15); }
  .slider-tag.tag-ai { background: rgba(108, 92, 231, 0.7); border-color: rgba(108, 92, 231, 0.5); }

  .card-img2vid { overflow: hidden; border-radius: var(--radius); transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease; }
  .card-img2vid:hover { transform: translateY(-8px) scale(1.03); box-shadow: 0 20px 50px rgba(253,121,168,0.2); }
  .video-card-container { position: relative; width: 100%; aspect-ratio: 16/9; overflow: hidden; background: #000; }
  .video-card-poster { position: absolute; inset: 0; background-size: cover; background-position: center; transition: opacity 0.4s ease, transform 0.4s ease; z-index: 1; }
  .video-card-media { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 0.4s ease; z-index: 2; transform: scale(1.05); }
  .card-img2vid:hover .video-card-poster { opacity: 0; transform: scale(1.1); }
  .card-img2vid:hover .video-card-media { opacity: 1; }
  .video-card-overlay { position: absolute; inset: 0; z-index: 3; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.2); transition: var(--transition); pointer-events: none; }
  .card-img2vid:hover .video-card-overlay { background: rgba(0,0,0,0); }
  .video-card-icon { width: 48px; height: 48px; border-radius: 50%; background: rgba(255,255,255,0.2); backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: #fff; border: 2px solid rgba(255,255,255,0.4); transition: var(--transition); }
  .card-img2vid:hover .video-card-icon { transform: scale(0.8); opacity: 0; }
  .video-card-badge { position: absolute; bottom: 10px; right: 10px; padding: 3px 10px; border-radius: 4px; font-size: 0.7rem; font-weight: 700; z-index: 4; background: rgba(253,121,168,0.9); color: #fff; display: flex; align-items: center; gap: 4px; }
  .video-card-badge .rec-dot { width: 6px; height: 6px; border-radius: 50%; background: #fff; animation: pulse 1s infinite; }

  .tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .tool-card { background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 32px 24px; text-align: center; transition: var(--transition); cursor: pointer; }
  .tool-card:hover { transform: translateY(-6px); border-color: rgba(253,203,110,0.4); box-shadow: var(--shadow); }
  .tool-icon { font-size: 2.5rem; margin-bottom: 16px; display: block; }
  .tool-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
  .tool-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
  .tool-link { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; font-weight: 600; color: var(--accent-2); transition: var(--transition); }
  .tool-link:hover { gap: 10px; }

  .news-list { display: flex; flex-direction: column; gap: 16px; }
  .news-link { display: block; text-decoration: none; color: inherit; }
  .news-item { display: flex; gap: 20px; align-items: flex-start; background: var(--bg-card); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 24px; transition: var(--transition); cursor: pointer; }
  .news-item:hover { border-color: rgba(108,92,231,0.3); transform: translateX(6px); }
  .news-date { flex-shrink: 0; text-align: center; padding: 8px 14px; background: rgba(108,92,231,0.12); border-radius: 10px; min-width: 64px; }
  .news-date .day { font-size: 1.4rem; font-weight: 800; color: var(--accent-1); display: block; }
  .news-date .month { font-size: 0.75rem; color: var(--text-secondary); }
  .news-content h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
  .news-content p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

  

  /* Responsive */
  @media (max-width: 1024px) {
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-slide p { margin: 0 auto 32px; }
    .hero-buttons, .hero-stats, .hero-indicators { justify-content: center; }
    .hero-visual { order: -1; }
    .visual-slider { max-width: 420px; margin: 0 auto; }
    .card-grid, .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .scene-3d { width: 160px; height: 160px; }
    .cube-face { width: 160px; height: 160px; }
    .cube-face.front  { transform: translateZ(80px); } .cube-face.back   { transform: rotateY(180deg) translateZ(80px); }
    .cube-face.right  { transform: rotateY(90deg) translateZ(80px); } .cube-face.left   { transform: rotateY(-90deg) translateZ(80px); }
    .cube-face.top    { transform: rotateX(90deg) translateZ(80px); } .cube-face.bottom { transform: rotateX(-90deg) translateZ(80px); }
  }
  @media (max-width: 768px) {
    :root { --nav-height: 60px; }
    .nav-links, .nav-actions .btn-ghost { display: none; }
    .mobile-toggle { display: block; }
    .hero { min-height: auto; padding-top: calc(var(--nav-height) + 40px); padding-bottom: 40px; }
    .hero .container { gap: 40px; }
    .hero-stats { gap: 24px; }
    .hero-stats .stat-item h3 { font-size: 1.3rem; }
    .card-grid, .tools-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-col { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-col h4 { width: 100%; margin-bottom: 10px; }
    .footer-col a { display: inline-block; margin-bottom: 0; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .content-section { padding: 60px 0; }
    .section-header { flex-direction: column; align-items: flex-start; gap: 8px; }
    .news-item { flex-direction: column; gap: 12px; }
    .news-date { display: flex; align-items: center; gap: 8px; min-width: auto; padding: 6px 14px; }
    .scene-3d { width: 140px; height: 140px; }
    .cube-face { width: 140px; height: 140px; font-size: 2rem; }
    .cube-face.front  { transform: translateZ(70px); } .cube-face.back   { transform: rotateY(180deg) translateZ(70px); }
    .cube-face.right  { transform: rotateY(90deg) translateZ(70px); } .cube-face.left   { transform: rotateY(-90deg) translateZ(70px); }
    .cube-face.top    { transform: rotateX(90deg) translateZ(70px); } .cube-face.bottom { transform: rotateX(-90deg) translateZ(70px); }
    .glow-ring { width: 220px; height: 220px; }
    .glow-ring:nth-child(2) { width: 260px; height: 260px; }
    .glow-ring:nth-child(3) { width: 300px; height: 300px; }
    .auth-modal { max-width: 90%; margin: 0 16px; }
    .auth-view { padding: 32px 24px; }
  }
  @media (max-width: 480px) {
    .visual-slider { max-width: 100%; }
    .hero-stats { flex-direction: row; justify-content: center; gap: 12px; flex-wrap: nowrap; margin-top: 36px; padding-top: 24px; }
    .hero-stats .stat-item { flex: 1; min-width: 0; text-align: center; }
    .hero-stats .stat-item h3 { font-size: 1.2rem; }
    .hero-stats .stat-item p { font-size: 0.75rem; }
    .hero-slide h1 { font-size: 1.9rem; }
    .hero-slide p { font-size: 0.95rem; }
    .hero-buttons .btn { padding: 12px 24px; font-size: 0.9rem; }
    .sub-cats { gap: 6px; }
    .sub-cat-pill { padding: 5px 12px; font-size: 0.78rem; }
    .hero-indicators { gap: 8px; margin-top: 24px; }
    .hero-indicator { width: 32px; }
    .visual-art { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
    .art-workflow { flex-direction: row; flex-wrap: wrap; padding: 12px; gap: 8px; border-right: none; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .wf-node { font-size: 0.6rem; padding: 5px 8px; }
    .wf-node::before { display: none; }
    .scene-3d { width: 120px; height: 120px; }
    .cube-face { width: 120px; height: 120px; font-size: 1.6rem; }
    .cube-face.front  { transform: translateZ(60px); } .cube-face.back   { transform: rotateY(180deg) translateZ(60px); }
    .cube-face.right  { transform: rotateY(90deg) translateZ(60px); } .cube-face.left   { transform: rotateY(-90deg) translateZ(60px); }
    .cube-face.top    { transform: rotateX(90deg) translateZ(60px); } .cube-face.bottom { transform: rotateX(-90deg) translateZ(60px); }
    .mesh-grid { width: 250px; }
    .slider-tags { bottom: 8px; right: 8px; gap: 4px; }
    .slider-tag { padding: 3px 8px; font-size: 0.65rem; }
  }