/* Hero Section - 全屏沉浸式 */
    .hero {
      min-height: 100vh;
      padding: 0;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      background: var(--dark-bg);
    }

    /* 动态背景网格 */
    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background:
        radial-gradient(circle at 20% 30%, rgba(0, 255, 163, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 224, 255, 0.06) 0%, transparent 50%);
      animation: breathe 8s ease-in-out infinite;
    }

    @keyframes breathe {
      0%, 100% { opacity: 0.4; }
      50% { opacity: 0.7; }
    }

    /* 网格背景 */
    .hero::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
      background-size: 60px 60px;
      opacity: 0.5;
    }

    .hero-main {
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 4rem;
      align-items: center;
      width: 100%;
      max-width: 1600px;
      margin: 0 auto;
      padding: 0 5vw;
      position: relative;
      z-index: 1;
    }

    /* Hero Content (Text + Download) */
    .hero-content {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hero-content-wrapper {
      max-width: fit-content;
      text-align: left;
    }

    .hero-title-wrapper {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 1.5rem;
    }

    .hero-logo {
      width: 100px;
      height: 100px;
      border-radius: 20px;
      flex-shrink: 0;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4rem);
      font-weight: 800;
      margin-bottom: 0;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.1;
      white-space: nowrap;
      letter-spacing: -0.02em;
      animation: fadeInUp 0.8s ease-out;
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .hero-subtitle {
      font-size: clamp(1.125rem, 2.5vw, 1.375rem);
      color: var(--text-primary);
      margin-bottom: 1.25rem;
      line-height: 1.5;
    }

    .hero-description {
      font-size: 1.1rem;
      color: #B0BEC5;
      margin-bottom: 1rem;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-top: 1.75rem;
      margin-bottom: 3rem;
    }

    .hero-tag {
      font-size: 0.9375rem;
      color: #B0BEC5;
      background: rgba(255, 255, 255, 0.08);
      padding: 0.5rem 1rem;
      border-radius: 20px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      display: inline-block;
      transition: all 0.3s ease;
    }

    .hero-tag:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .hero-highlight {
      font-size: 1.05rem;
      color: var(--text-accent);
      font-weight: 600;
      margin-bottom: 2.5rem;
      line-height: 1.4;
    }

    /* Trust Signals */
    .trust-signals {
      display: flex;
      gap: 2rem;
      margin-bottom: 2.5rem;
      flex-wrap: wrap;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .trust-icon {
      font-size: 1.2rem;
    }

    /* Download Buttons in Hero */
    .hero-download-section {
      margin-top: 2.5rem;
    }

    .hero-download-cards {
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
      max-width: 350px;
    }

    .hero-download-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 1.2rem 2.5rem;
      background: var(--gradient);
      color: #000;
      text-decoration: none;
      border-radius: 50px;
      font-weight: 700;
      font-size: 1.05rem;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: var(--shadow-lg), var(--glow-green);
      position: relative;
      overflow: hidden;
      border: none;
      cursor: pointer;
    }

    .hero-download-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
      transition: left 0.6s ease;
    }

    .hero-download-btn:hover::before {
      left: 100%;
    }

    .hero-download-btn:hover {
      transform: translateY(-4px) scale(1.02);
      box-shadow: var(--shadow-xl), var(--glow-accent);
      background: var(--gradient-hover);
    }

    .hero-download-btn:active {
      transform: translateY(-2px) scale(0.98);
    }

    .hero-download-btn.secondary {
      background: var(--glass-bg);
      color: var(--text-primary);
      border: 1px solid var(--glass-border);
      backdrop-filter: blur(40px) saturate(180%);
      box-shadow: var(--shadow-md);
    }

    .hero-download-btn.secondary:hover {
      border-color: rgba(0, 255, 163, 0.4);
      box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 255, 163, 0.2);
      background: rgba(17, 18, 21, 0.8);
    }

    .download-meta {
      font-size: 0.9rem;
      color: var(--text-secondary);
      text-align: center;
      margin-top: 1rem;
    }

    .download-info {
      margin-top: 1rem;
      font-size: 0.85rem;
      color: var(--text-secondary);
      text-align: left;
    }

    .download-info p {
      margin: 0.3rem 0;
      text-align: left;
    }

    /* Video in Hero - 升级为3D悬浮效果 */
    .hero-video {
      position: relative;
      animation: fadeInRight 1s ease-out;
    }

    @keyframes fadeInRight {
      from {
        opacity: 0;
        transform: translateX(50px);
      }
      to {
        opacity: 1;
        transform: translateX(0);
      }
    }

    .video-container {
      width: 100%;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-xl), var(--glow-blue);
      background: rgba(0, 0, 0, 0.9);
      border: 1px solid var(--glass-border);
      transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
      transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    }

    .video-container:hover {
      transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
      box-shadow: var(--shadow-xl), var(--glow-accent);
    }

    .video-container iframe {
      width: 100%;
      height: 380px;
      border: none;
    }

    .video-loading,
    .video-fallback {
      width: 100%;
      height: 380px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      background: rgba(0, 0, 0, 0.8);
      border-radius: 20px;
    }

    .video-loading p {
      margin-top: 1rem;
      color: var(--text-secondary);
    }

    .fallback-content {
      text-align: center;
    }

    .fallback-icon {
      font-size: 3rem;
      display: block;
      margin-bottom: 1rem;
    }

    .fallback-content h3 {
      color: var(--text-primary);
      margin-bottom: 0.5rem;
    }

    .fallback-content p {
      color: var(--text-secondary);
      margin-bottom: 1.5rem;
    }

    .retry-btn {
      padding: 0.8rem 1.5rem;
      background: var(--gradient);
      color: #000;
      border: none;
      border-radius: 25px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .retry-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(0, 255, 136, 0.4);
    }

    /* 3D 截图展示区 - 新增 */
    .screenshots-showcase {
      padding: 8rem 0;
      background: var(--dark-bg-secondary);
      position: relative;
      overflow: hidden;
    }

    .screenshots-showcase::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 80%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 255, 163, 0.3), transparent);
    }

    .screenshot-hero {
      margin-bottom: 4rem;
      text-align: center;
      animation: fadeIn 1s ease-out;
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    .screenshot-hero img {
      width: 90%;
      max-width: 1200px;
      border-radius: 24px;
      box-shadow: var(--shadow-xl), var(--glow-green);
      border: 1px solid var(--glass-border);
      transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .screenshot-hero img:hover {
      transform: scale(1.02);
      box-shadow: var(--shadow-xl), var(--glow-accent);
    }

    .screenshot-caption {
      margin-top: 1.5rem;
      font-size: 1.1rem;
      color: var(--text-secondary);
    }

    .screenshot-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 3rem;
      max-width: 1200px;
      margin: 0 auto;
    }

    .screenshot-item {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      background: var(--card-bg);
      border: 1px solid var(--glass-border);
      transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
    }

    .screenshot-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(circle at center, rgba(0, 255, 163, 0.1), transparent);
      opacity: 0;
      transition: opacity 0.5s ease;
    }

    .screenshot-item:hover::before {
      opacity: 1;
    }

    .screenshot-item:hover {
      transform: translateY(-12px) scale(1.03);
      border-color: rgba(0, 255, 163, 0.3);
      box-shadow: var(--shadow-xl), var(--glow-green);
    }

    .screenshot-item img {
      width: 100%;
      height: auto;
      display: block;
      transition: all 0.5s ease;
    }

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

    .screenshot-item h3 {
      padding: 1.5rem;
      margin: 0;
      font-size: 1.3rem;
      color: var(--text-primary);
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
    }

    .screenshot-item p {
      padding: 0 1.5rem 1.5rem;
      margin: 0;
      color: var(--text-secondary);
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
    }

    /* Download Section */
    .download-section {
      padding: 6rem 0;
      background: var(--dark-bg);
    }

    .section-title {
      font-size: clamp(2.5rem, 6vw, 3.5rem);
      text-align: center;
      margin-bottom: 4rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      position: relative;
      padding-bottom: 1.5rem;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background: var(--gradient);
      border-radius: 2px;
    }

    .download-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
      max-width: 1000px;
      margin: 0 auto;
    }

    .download-card {
      background: rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 24px;
      padding: 2.5rem 2rem;
      text-align: center;
      backdrop-filter: blur(20px);
      transition: all 0.4s ease;
      position: relative;
      overflow: hidden;
    }

    .download-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--gradient);
      transform: scaleX(0);
      transition: transform 0.4s ease;
    }

    .download-card:hover::before {
      transform: scaleX(1);
    }

    .download-card:hover {
      transform: translateY(-10px);
      border-color: rgba(0, 255, 136, 0.3);
      box-shadow: 0 20px 60px rgba(0, 255, 136, 0.2);
    }

    .download-card h3 {
      font-size: 1.5rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
      color: var(--text-primary);
    }

    .download-version {
      color: var(--text-accent);
      font-size: 1rem;
      margin-bottom: 2rem;
      font-weight: 500;
    }

    .download-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 1rem 2rem;
      background: var(--gradient);
      color: #000;
      text-decoration: none;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s ease;
      box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
      position: relative;
      overflow: hidden;
    }

    .download-btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
      transition: left 0.5s;
    }

    .download-btn:hover::before {
      left: 100%;
    }

    .download-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 255, 136, 0.5);
    }