/* roulang page: index */
:root {
      --primary: #0A0E27;
      --cyan: #00F0FF;
      --red: #FF4655;
      --bg-light: #F5F6FA;
      --bg-dark: #0A0E27;
      --bg-darker: #060A1A;
      --text-dark: #1A1F36;
      --text-gray: #6B7280;
      --text-white: #FFFFFF;
      --success: #00E676;
      --warning: #FFB300;
      --sans: 'Noto Sans SC', sans-serif;
      --mono: 'Inter', sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 1px 3px rgba(10,14,39,0.08), 0 4px 12px rgba(10,14,39,0.04);
      --shadow-dark: 0 0 0 1px rgba(0,240,255,0.15), 0 8px 24px rgba(0,0,0,0.4);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--sans);
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    /* 导航栏 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: 72px;
      display: flex;
      align-items: center;
      transition: var(--transition);
      background: transparent;
    }

    .nav.scrolled {
      background: rgba(10,14,39,0.92);
      backdrop-filter: blur(24px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      flex-direction: column;
    }

    .logo-main {
      font-family: var(--mono);
      font-weight: 800;
      font-size: 1.5rem;
      background: linear-gradient(135deg, #00F0FF, #00D4E0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .logo-sub {
      font-size: 0.7rem;
      color: rgba(255,255,255,0.5);
      letter-spacing: 0.5px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      font-weight: 500;
      color: rgba(255,255,255,0.85);
      position: relative;
      padding: 6px 0;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan);
      transition: width 0.25s ease;
    }

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

    .nav-link:hover::after {
      width: 100%;
    }

    .btn-nav {
      background: var(--red);
      color: white;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .btn-nav:hover {
      background: #E63946;
      box-shadow: 0 0 20px rgba(255,70,85,0.5);
      transform: translateY(-2px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      transition: var(--transition);
    }

    .mobile-menu {
      display: none;
    }

    @media (max-width: 1024px) {
      .nav-menu {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-menu {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--bg-dark);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 32px;
        z-index: 999;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
      }
      .mobile-menu.active {
        opacity: 1;
        pointer-events: auto;
      }
      .mobile-link {
        font-size: 1.4rem;
        font-weight: 500;
        color: var(--text-white);
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: var(--bg-dark);
      position: relative;
      overflow: hidden;
      padding-top: 72px;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
      z-index: 0;
    }

    .particles {
      position: absolute;
      inset: 0;
      z-index: 1;
      background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.08) 0%, transparent 50%);
    }

    .hero-container {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .hero-text {
      flex: 1;
    }

    .hero h1 {
      font-family: var(--mono);
      font-weight: 800;
      font-size: 3.5rem;
      background: linear-gradient(135deg, #00F0FF, #00D4E0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      font-weight: 400;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--cyan);
      color: var(--bg-dark);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      font-size: 1rem;
    }

    .btn-primary:hover {
      background: #00D4E0;
      box-shadow: 0 0 24px rgba(0,240,255,0.5);
      transform: translateY(-2px);
    }

    .btn-outline {
      border: 2px solid var(--cyan);
      color: var(--cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      background: transparent;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
    }

    .live-card {
      flex: 0.8;
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0,240,255,0.25);
      border-radius: 16px;
      padding: 28px;
      color: white;
    }

    .live-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--red);
      font-weight: 600;
      margin-bottom: 20px;
    }

    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--red);
      border-radius: 50%;
      animation: pulse 1s infinite;
    }

    .match-teams {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }

    .team {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    .team img {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(255,255,255,0.1);
    }

    .live-score {
      font-family: var(--mono);
      font-weight: 800;
      font-size: 2.5rem;
      color: var(--cyan);
      text-align: center;
    }

    @media (max-width: 1024px) {
      .hero-container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
    }

    /* 通用板块 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-weight: 700;
      font-size: 2.5rem;
      text-align: center;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    .section-sub {
      text-align: center;
      color: var(--text-gray);
      max-width: 600px;
      margin: 0 auto 48px;
    }

    .dark-section {
      background: var(--bg-dark);
      color: white;
    }

    .dark-section .section-title {
      color: white;
    }

    .dark-section .section-sub {
      color: rgba(255,255,255,0.7);
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin-top: 32px;
    }

    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 36px 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
    }

    .service-card:nth-child(2) {
      transform: translateY(-24px);
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 0 0 2px rgba(0,240,255,0.3), 0 12px 28px rgba(10,14,39,0.1);
    }

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

    .service-card h3 {
      font-weight: 500;
      margin-bottom: 12px;
    }

    .service-desc {
      color: var(--text-gray);
      margin-bottom: 24px;
    }

    .service-link {
      color: var(--cyan);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    @media (max-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .service-card:nth-child(2) {
        transform: none;
      }
    }
    @media (max-width: 640px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 数据指标 */
    .data-panel {
      display: flex;
      gap: 48px;
      align-items: center;
      flex-wrap: wrap;
    }

    .data-chart {
      flex: 1;
      min-width: 280px;
      background: rgba(255,255,255,0.05);
      border-radius: var(--radius-card);
      padding: 32px;
      backdrop-filter: blur(8px);
      border: 1px solid rgba(0,240,255,0.2);
      height: 260px;
      display: flex;
      align-items: flex-end;
      gap: 12px;
    }

    .bar {
      flex: 1;
      background: linear-gradient(to top, #00F0FF, #00D4E0);
      border-radius: 4px 4px 0 0;
      height: var(--h);
      transition: height 0.6s ease;
    }

    .metrics {
      flex: 1;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .metric {
      background: rgba(255,255,255,0.05);
      border-radius: var(--radius-card);
      padding: 24px;
      text-align: center;
    }

    .metric-number {
      font-family: var(--mono);
      font-weight: 600;
      font-size: 2.5rem;
      color: var(--cyan);
      font-feature-settings: "tnum";
    }

    @media (max-width: 640px) {
      .data-panel {
        flex-direction: column;
      }
    }

    /* 标签切换 */
    .tabs {
      display: flex;
      justify-content: center;
      gap: 32px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .tab {
      font-weight: 500;
      color: var(--text-gray);
      padding-bottom: 8px;
      cursor: pointer;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }

    .tab.active {
      color: var(--cyan);
      border-bottom-color: var(--cyan);
    }

    .tab-content {
      display: none;
      align-items: center;
      gap: 40px;
    }

    .tab-content.active {
      display: flex;
    }

    @media (max-width: 640px) {
      .tab-content.active {
        flex-direction: column;
      }
    }

    /* 案例滚动 */
    .cases-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: none;
    }

    .cases-scroll::-webkit-scrollbar {
      display: none;
    }

    .case-card {
      min-width: 340px;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 0 0 2px rgba(0,240,255,0.25);
    }

    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }

    .case-body {
      padding: 20px;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      border-bottom: 1px solid #E5E7EB;
      padding: 16px 0;
      cursor: pointer;
    }

    .faq-q {
      font-weight: 500;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-gray);
    }

    @media (max-width: 640px) {
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    /* CTA Banner */
    .cta-banner {
      background: var(--bg-dark);
      padding: 80px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-bg {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 50%, rgba(0,240,255,0.1) 0%, transparent 60%);
    }

    .btn-red {
      background: var(--red);
      color: white;
      font-weight: 600;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      transition: var(--transition);
      display: inline-block;
      margin: 12px;
    }

    .btn-red:hover {
      background: #E63946;
      box-shadow: 0 0 24px rgba(255,70,85,0.6);
    }

    /* Footer */
    footer {
      background: var(--bg-darker);
      color: white;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: white;
      margin-bottom: 16px;
      font-weight: 500;
    }

    .footer-col a {
      display: block;
      color: rgba(255,255,255,0.6);
      margin-bottom: 8px;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: var(--cyan);
    }

    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 24px;
      text-align: center;
      color: rgba(255,255,255,0.5);
      font-size: 0.9rem;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @keyframes pulse {
      0% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(1.2); }
    }

    @keyframes flip {
      0% { transform: rotateX(0); }
      50% { transform: rotateX(90deg); }
    }