/* roulang page: index */
:root {
      --deep-blue: #0A1128;
      --champion-gold: #C9A84C;
      --electric-cyan: #00E5FF;
      --glass-bg: rgba(10, 17, 40, 0.7);
      --glass-border: rgba(255, 255, 255, 0.08);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      --gold-gradient: linear-gradient(135deg, #E0B84C 0%, #B38A2C 100%);
      --cyan-gradient: linear-gradient(135deg, #00E5FF 0%, #00A3B5 100%);
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.8);
      --text-tertiary: rgba(255, 255, 255, 0.6);
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-xs: 8px;
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--deep-blue);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(circle at 20% 20%, rgba(0, 229, 255, 0.08) 0%, transparent 50%);
      overflow-x: hidden;
    }

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

    /* 英文/数字使用现代字体 */
    .stat-number, .tag, .en-font {
      font-family: 'Inter', 'SF Pro Display', sans-serif;
      font-weight: 700;
    }

    /* 导航 */
    .brand-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 700;
      color: var(--text-primary);
      text-decoration: none;
      letter-spacing: 1px;
    }
    .logo i {
      color: var(--champion-gold);
      font-size: 28px;
    }
    .channel-nav {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      padding: 12px 0;
    }
    .channel-tag {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(8px);
      color: rgba(255,255,255,0.75);
      padding: 8px 18px;
      border-radius: 40px;
      font-size: 14px;
      font-weight: 500;
      text-decoration: none;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }
    .channel-tag:hover,
    .channel-tag.active {
      border-color: var(--champion-gold);
      color: var(--champion-gold);
      background: rgba(201,168,76,0.1);
      box-shadow: 0 0 12px rgba(201,168,76,0.2);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--text-primary);
      font-size: 28px;
      cursor: pointer;
    }
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border-radius: var(--radius-sm);
      padding: 20px;
      margin-bottom: 15px;
      border: 1px solid var(--glass-border);
    }
    .mobile-menu a {
      color: var(--text-secondary);
      padding: 10px 0;
      text-decoration: none;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .mobile-menu a:last-child { border-bottom: none; }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      background-blend-mode: overlay;
      background-color: rgba(10,17,40,0.65);
    }
    .hero::before {
      content: '';
      position: absolute;
      top:0;left:0;right:0;bottom:0;
      background: radial-gradient(circle at 30% 40%, rgba(0,229,255,0.15) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 20px;
      color: #FFFFFF;
      text-shadow: 0 4px 20px rgba(0,0,0,0.5);
    }
    .hero .subtitle {
      font-size: 18px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
      max-width: 550px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--gold-gradient);
      border: none;
      color: #0A1128;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: 40px;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 15px rgba(201,168,76,0.3);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover {
      box-shadow: 0 0 22px #C9A84C;
      transform: translateY(-2px);
      color: #0A1128;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--electric-cyan);
      color: var(--electric-cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: 40px;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.15);
      box-shadow: 0 0 18px #00E5FF;
      color: #FFFFFF;
    }

    /* 通用区块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 60px;
      height: 3px;
      background: var(--champion-gold);
      border-radius: 2px;
    }
    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 16px;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }
    .glass-card:hover {
      transform: translateY(-8px);
      border-color: rgba(201,168,76,0.5);
      box-shadow: 0 16px 40px rgba(0,0,0,0.6);
    }

    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-icon {
      font-size: 36px;
      color: var(--electric-cyan);
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 22px;
      margin-bottom: 12px;
      font-weight: 700;
    }
    .service-card p {
      font-size: 15px;
      color: var(--text-secondary);
      margin-bottom: 18px;
    }
    .gold-link {
      color: var(--champion-gold);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
    }
    .gold-link:hover {
      color: #fff;
      text-shadow: 0 0 8px var(--champion-gold);
    }

    /* 数据优势 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-sm);
      padding: 32px 16px;
      backdrop-filter: blur(8px);
    }
    .stat-number {
      font-size: 48px;
      color: var(--champion-gold);
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 15px;
      color: var(--text-tertiary);
      font-weight: 500;
    }

    /* 案例卡片两列 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }
    .case-card {
      display: flex;
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--glass-border);
    }
    .case-img {
      width: 45%;
      background-size: cover;
      background-position: center;
      min-height: 240px;
    }
    .case-info {
      padding: 28px;
      width: 55%;
    }
    .case-info h3 {
      font-size: 20px;
      margin-bottom: 12px;
    }
    .tag {
      background: rgba(0,229,255,0.15);
      color: var(--electric-cyan);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      display: inline-block;
      margin-bottom: 10px;
    }

    /* 解决方案图文交错 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 60px;
    }
    .solution-row.reverse {
      flex-direction: row-reverse;
    }
    .solution-text {
      flex: 1;
    }
    .solution-img {
      flex: 1;
      background-size: cover;
      background-position: center;
      min-height: 280px;
      border-radius: var(--radius-md);
    }

    /* FAQ 手风琴 */
    .accordion-title {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-xs);
      padding: 16px 20px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      color: var(--champion-gold);
      display: flex;
      justify-content: space-between;
    }
    .accordion-title:hover {
      background: rgba(201,168,76,0.1);
    }
    .accordion-content {
      background: rgba(255,255,255,0.02);
      padding: 0 20px 16px;
      color: var(--text-secondary);
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    .accordion-item.active .accordion-title i {
      transform: rotate(180deg);
      color: var(--electric-cyan);
    }

    /* 联系CTA */
    .cta-block {
      background: linear-gradient(135deg, rgba(10,17,40,0.9) 0%, rgba(30,40,70,0.8) 100%);
      border: 1px solid rgba(201,168,76,0.2);
      border-radius: 24px;
      padding: 60px 30px;
      text-align: center;
    }
    .input-glass {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 40px;
      padding: 14px 20px;
      color: white;
      width: 280px;
      margin-right: 12px;
    }
    .input-glass:focus {
      outline: none;
      border-color: var(--electric-cyan);
    }

    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding: 50px 0 30px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding: 20px 0;
      text-align: center;
      font-size: 13px;
      color: var(--text-tertiary);
    }

    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2,1fr); }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .cases-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .channel-nav { display: none; }
      .hamburger { display: block; }
      .hero h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .services-grid, .stats-grid { grid-template-columns: 1fr; }
      .solution-row { flex-direction: column; }
      .solution-row.reverse { flex-direction: column; }
      .case-card { flex-direction: column; }
      .case-img, .case-info { width: 100%; }
      .footer-grid { grid-template-columns: 1fr; }
    }