/* roulang page: index */
:root {
      --primary-orange: #F04E23;
      --primary-orange-light: #FF6B3D;
      --deep-ink: #1B1C1E;
      --ice-white: #F5F6FA;
      --electric-cyan: #00D4AA;
      --text-dark: #2C2C2C;
      --text-muted: #6B6B6B;
      --text-light: #CCCCCC;
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
      --card-hover-shadow: 0 20px 40px rgba(240, 78, 35, 0.12);
      --border-light: rgba(255, 255, 255, 0.08);
      --radius-card: 22px;
      --radius-btn: 50px;
      --radius-tag: 8px;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--ice-white);
      color: var(--text-dark);
      line-height: 1.5;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 数字专用字体 */
    .stat-number, .price-digit, .data-badge-num {
      font-family: 'Bebas Neue', 'DIN Alternate', 'Oswald', sans-serif;
      letter-spacing: 0.5px;
    }

    /* 导航系统 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: linear-gradient(180deg, rgba(27,28,30,0.9) 0%, rgba(27,28,30,0.4) 100%);
      backdrop-filter: blur(12px);
      transition: var(--transition-smooth);
      border-bottom: 1px solid transparent;
    }

    #header.scrolled {
      background: rgba(245, 246, 250, 0.95);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    #header.scrolled .nav-link {
      color: var(--deep-ink);
    }

    #header.scrolled .logo-text {
      color: var(--deep-ink);
    }

    #header.scrolled .mobile-toggle i {
      color: var(--deep-ink);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 80px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #F04E23, #FF6B3D);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 20px;
      box-shadow: 0 8px 16px rgba(240,78,35,0.3);
    }

    .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
      letter-spacing: -0.3px;
      transition: color 0.3s;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }

    .nav-link {
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      color: rgba(255,255,255,0.85);
      transition: color 0.2s;
      position: relative;
    }

    .nav-link:hover {
      color: var(--primary-orange);
    }

    .nav-cta {
      background: linear-gradient(135deg, #F04E23 0%, #FF6B3D 100%);
      color: white !important;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      box-shadow: 0 8px 18px rgba(240,78,35,0.3);
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }

    .nav-cta:hover {
      box-shadow: 0 12px 28px rgba(240,78,35,0.5);
      transform: translateY(-2px);
      color: white;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }

    /* 英雄区 */
    #hero {
      background: radial-gradient(circle at 30% 30%, #2a2c30, #1B1C1E);
      position: relative;
      overflow: hidden;
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding: 120px 0 80px;
    }

    .hero-grid-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      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: 60px 60px;
      pointer-events: none;
    }

    .hero-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-text h1 {
      font-size: clamp(2.6rem, 5vw, 3.8rem);
      font-weight: 800;
      line-height: 1.2;
      color: white;
      margin-bottom: 1.5rem;
      letter-spacing: -0.5px;
    }

    .highlight {
      color: var(--primary-orange);
    }

    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.7);
      margin-bottom: 2.2rem;
    }

    .badge-row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 2.8rem;
    }

    .data-badge {
      background: rgba(0, 212, 170, 0.15);
      backdrop-filter: blur(8px);
      padding: 10px 20px;
      border-radius: var(--radius-tag);
      color: var(--electric-cyan);
      font-weight: 600;
      display: flex;
      align-items: baseline;
      gap: 6px;
      border: 1px solid rgba(0,212,170,0.3);
    }

    .data-badge-num {
      font-size: 2rem;
      line-height: 1;
    }

    .cta-group {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #F04E23 0%, #FF6B3D 100%);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      text-decoration: none;
      display: inline-block;
      box-shadow: 0 12px 28px rgba(240,78,35,0.35);
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }

    .btn-primary:hover {
      box-shadow: 0 18px 36px rgba(240,78,35,0.5);
      transform: translateY(-3px);
    }

    .btn-outline {
      border: 2px solid var(--electric-cyan);
      color: var(--electric-cyan);
      padding: 14px 38px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition-smooth);
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--electric-cyan);
      color: var(--deep-ink);
    }

    .hero-visual {
      background: rgba(255,255,255,0.03);
      border-radius: 28px;
      padding: 20px;
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255,255,255,0.08);
      position: relative;
    }

    .hero-visual img {
      width: 100%;
      border-radius: 18px;
      display: block;
    }

    .live-badge-sim {
      position: absolute;
      top: 20px;
      right: 20px;
      background: #F04E23;
      color: white;
      padding: 6px 18px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.9rem;
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; }
      50% { opacity: 0.7; }
      100% { opacity: 1; }
    }

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

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--deep-ink);
    }

    .section-sub {
      text-align: center;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto 60px;
    }

    /* 功能卡片网格 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 32px;
    }

    .feature-card {
      background: white;
      padding: 36px 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      border: 1px solid transparent;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--card-hover-shadow);
      border-color: var(--primary-orange);
    }

    .feature-icon {
      font-size: 2.6rem;
      color: var(--electric-cyan);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
    }

    .micro-link {
      color: var(--electric-cyan);
      font-weight: 600;
      text-decoration: none;
      margin-top: 16px;
      display: inline-block;
    }

    /* 场景卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .scenario-card {
      height: 400px;
      border-radius: 28px;
      background-size: cover;
      background-position: center;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: flex-end;
      transition: 0.4s ease;
    }

    .scenario-card:hover {
      transform: scale(1.02);
    }

    .scenario-overlay {
      background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 80%);
      padding: 32px;
      width: 100%;
      color: white;
    }

    /* 案例卡片 */
    .case-scroll {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .case-card {
      background: white;
      border-radius: 20px;
      padding: 28px;
      border-left: 6px solid var(--electric-cyan);
      box-shadow: var(--card-shadow);
    }

    /* 定价 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: start;
    }

    .pricing-card {
      background: white;
      border-radius: 24px;
      padding: 40px 28px;
      text-align: center;
      box-shadow: var(--card-shadow);
    }

    .pricing-card.featured {
      border: 2px solid var(--primary-orange);
      background: #fffaf8;
      transform: scale(1.03);
    }

    .price {
      font-size: 3.2rem;
      color: var(--deep-ink);
      margin: 20px 0;
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: white;
      border-radius: 16px;
      margin-bottom: 16px;
      padding: 20px 28px;
      border-left: 5px solid var(--electric-cyan);
      cursor: pointer;
    }

    /* CTA */
    .cta-band {
      background: var(--deep-ink);
      text-align: center;
      padding: 100px 0;
      color: white;
      border-radius: 40px;
      margin: 0 32px 80px;
    }

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

    .copyright {
      border-top: 1px solid rgba(0,0,0,0.08);
      padding: 24px 0;
      text-align: center;
      color: var(--text-muted);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-content {
        grid-template-columns: 1fr;
      }
      .scenario-grid, .case-scroll, .pricing-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--deep-ink);
        flex-direction: column;
        padding: 32px;
      }
      .mobile-toggle {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }