/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --neon-cyan: #00F0FF;
      --deep-bg: #0E0E15;
      --card-bg: rgba(20, 18, 35, 0.85);
      --accent-orange: #FF5E1A;
      --accent-orange-hover: #FF7A3D;
      --white: #FFFFFF;
      --text-light: #B0B3C1;
      --border-subtle: rgba(123, 47, 247, 0.25);
      --shadow-card: 0 8px 32px rgba(123, 47, 247, 0.15);
      --shadow-cyan: 0 0 24px rgba(0, 240, 255, 0.5);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-pill: 50px;
      --font-title: 'Orbitron', sans-serif;
      --font-body: 'Noto Sans SC', sans-serif;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--deep-bg);
      color: var(--text-light);
      line-height: 1.7;
      font-size: 16px;
      background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      color: var(--white);
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: 2px;
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 16px;
    }

    h3 {
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 20px;
      letter-spacing: 0.5px;
      color: var(--white);
    }

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

    img {
      max-width: 100%;
      display: block;
    }

    button, .btn {
      cursor: pointer;
      font-family: var(--font-title);
      font-weight: 600;
      font-size: 14px;
      letter-spacing: 1px;
      text-transform: uppercase;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.3s ease;
      border: none;
      outline: none;
    }

    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(14, 14, 21, 0.9);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      height: 72px;
      border-bottom: 1px solid rgba(123, 47, 247, 0.15);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 1.5rem;
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }

    .logo i {
      font-size: 1.8rem;
      background: none;
      -webkit-text-fill-color: var(--neon-cyan);
      text-shadow: 0 0 10px rgba(0,240,255,0.7);
    }

    .nav-links {
      display: flex;
      gap: 32px;
    }

    .nav-links a {
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 14px;
      color: var(--text-light);
      transition: 0.2s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
    }

    .header-cta {
      background: var(--accent-orange);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
    }

    .header-cta:hover {
      background: var(--accent-orange-hover);
      box-shadow: 0 0 18px rgba(255, 94, 26, 0.6);
    }

    .mobile-bottom-nav {
      display: none;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background: radial-gradient(circle at 30% 20%, rgba(123,47,247,0.25) 0%, transparent 50%),
                  radial-gradient(circle at 70% 60%, rgba(0,240,255,0.2) 0%, transparent 50%);
      padding-top: 72px;
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-text {
      flex: 1;
    }

    .hero-text h1 {
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-light);
      margin-bottom: 32px;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-cyan));
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-pill);
      border: none;
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--neon-cyan), var(--primary-purple));
      box-shadow: var(--shadow-cyan);
      transform: translateY(-2px);
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 14px 36px;
      border-radius: var(--radius-pill);
    }

    .btn-secondary:hover {
      background: rgba(0, 240, 255, 0.15);
      border-color: white;
      color: white;
    }

    .btn-cta-orange {
      background: var(--accent-orange);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      font-size: 16px;
      animation: pulse 2s infinite;
    }

    .btn-cta-orange:hover {
      background: var(--accent-orange-hover);
      box-shadow: 0 0 28px rgba(255,94,26,0.7);
    }

    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(255,94,26,0.5); }
      70% { box-shadow: 0 0 0 15px rgba(255,94,26,0); }
      100% { box-shadow: 0 0 0 0 rgba(255,94,26,0); }
    }

    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 400px;
      border-radius: var(--radius-lg);
      box-shadow: 0 0 30px rgba(123,47,247,0.5);
      border: 1px solid rgba(0,240,255,0.3);
      position: relative;
    }

    .scroll-indicator {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      color: var(--neon-cyan);
      font-size: 2rem;
      animation: bounce 1.5s infinite;
    }

    @keyframes bounce {
      0%,100%{transform:translateY(0);}
      50%{transform:translateY(-10px);}
    }

    /* 区块通用 */
    .section {
      padding: 100px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 64px;
    }

    /* 功能卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 40px 28px;
      border: 1px solid var(--border-subtle);
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      text-align: center;
    }

    .feature-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 12px 40px rgba(0,240,255,0.3);
      transform: translateY(-4px);
    }

    .feature-icon {
      font-size: 2.5rem;
      color: var(--neon-cyan);
      margin-bottom: 20px;
    }

    /* 场景交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }

    .scenario-row.reverse {
      flex-direction: row-reverse;
    }

    .scenario-text {
      flex: 1;
    }

    .scenario-img {
      flex: 1;
      background: url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      min-height: 300px;
      border-radius: var(--radius-lg);
      box-shadow: 0 0 25px rgba(123,47,247,0.4);
    }

    .scenario-row:nth-child(2) .scenario-img {
      background-image: url('/assets/images/coverpic/cover-2.webp');
    }
    .scenario-row:nth-child(3) .scenario-img {
      background-image: url('/assets/images/coverpic/cover-3.webp');
    }

    /* 案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .case-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border-subtle);
    }

    .case-number {
      font-family: var(--font-title);
      font-size: 48px;
      color: var(--neon-cyan);
    }

    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .pricing-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 40px 24px;
      border: 1px solid var(--border-subtle);
      text-align: center;
      position: relative;
    }

    .pricing-card.featured {
      border-color: var(--primary-purple);
      box-shadow: 0 0 30px rgba(123,47,247,0.4);
    }

    .badge {
      background: var(--accent-orange);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 12px;
      position: absolute;
      top: -12px;
      right: 20px;
    }

    .price {
      font-family: var(--font-title);
      font-size: 40px;
      color: var(--neon-cyan);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
    }

    .faq-question {
      font-weight: 600;
      font-size: 18px;
      color: white;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }

    .faq-answer {
      color: var(--text-light);
      margin-top: 12px;
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* CTA */
    .cta-full {
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-cyan));
      text-align: center;
      padding: 80px 24px;
      border-radius: var(--radius-lg);
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 60px 0;
    }

    .copyright {
      text-align: center;
      padding: 24px 0;
      border-top: 1px solid rgba(255,255,255,0.1);
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .features-grid, .pricing-grid { grid-template-columns: repeat(2,1fr); }
      .cases-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .site-header { display: none; }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        width: 100%;
        background: rgba(14,14,21,0.95);
        justify-content: space-around;
        padding: 10px 0;
        z-index: 1000;
      }
      .mobile-bottom-nav a {
        color: var(--text-light);
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      .hero-content { flex-direction: column; }
      h1 { font-size: 32px; }
      .scenario-row, .scenario-row.reverse { flex-direction: column; }
      .features-grid, .pricing-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }