/* roulang page: index */
:root {
      --deep-bg: #0A0E27;
      --card-bg: rgba(10, 14, 39, 0.7);
      --highlight-red: #FF4747;
      --highlight-red-dark: #D93A3A;
      --cyan-accent: #00D2FF;
      --text-primary: #1A1A2E;
      --text-secondary: #6C7A89;
      --light-bg: #F4F6FA;
      --border-light: #E6ECF2;
      --border-card: #2A2F45;
      --font-mono: 'DIN Alternate', 'Roboto Mono', 'Courier New', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-btn: 6px;
      --shadow-glow: 0 8px 20px rgba(255, 71, 71, 0.4);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      color: var(--text-primary);
      background-color: #fff;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.5px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      background: none;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: transparent;
      transition: background 0.3s ease, backdrop-filter 0.3s ease;
      padding: 16px 0;
      border-bottom: 1px solid transparent;
    }
    .navbar.scrolled {
      background: rgba(10, 14, 39, 0.95);
      backdrop-filter: blur(15px);
      border-bottom: 1px solid var(--highlight-red);
      padding: 12px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.6rem;
      font-weight: 800;
      color: #fff;
      letter-spacing: -1px;
    }
    .logo-icon {
      font-size: 2rem;
      color: var(--highlight-red);
      filter: drop-shadow(0 0 6px rgba(255,71,71,0.7));
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
    }
    .nav-links a:hover {
      color: var(--highlight-red);
    }
    .btn-nav {
      background: var(--highlight-red);
      color: #fff !important;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      box-shadow: 0 4px 12px rgba(255,71,71,0.3);
    }
    .btn-nav:hover {
      background: var(--highlight-red-dark);
      box-shadow: var(--shadow-glow);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10,14,27,0.98);
      backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 30px;
      z-index: 999;
    }
    .mobile-menu a {
      color: #fff;
      font-size: 1.6rem;
      font-weight: 600;
    }
    .mobile-menu .btn-nav {
      font-size: 1.3rem;
      padding: 14px 36px;
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, #0A0E27 0%, #1b1f3a 100%);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      align-items: center;
      color: #fff;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 30%, rgba(0,210,255,0.1) 0%, transparent 50%),
                  linear-gradient(180deg, rgba(10,14,39,0.7) 0%, rgba(10,14,39,0.8) 100%);
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      flex-wrap: wrap;
      width: 100%;
    }
    .hero-content {
      flex: 1 1 500px;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
    }
    .hero h1 span {
      color: var(--highlight-red);
      text-shadow: 0 0 20px rgba(255,71,71,0.5);
    }
    .hero-sub {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--highlight-red);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: 0.2s;
      box-shadow: 0 6px 18px rgba(255,71,71,0.3);
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--highlight-red-dark);
      box-shadow: var(--shadow-glow);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--cyan-accent);
      color: var(--cyan-accent);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 700;
      transition: 0.2s;
    }
    .btn-secondary:hover {
      background: var(--cyan-accent);
      color: #0A0E27;
    }
    .live-card {
      flex: 0 0 320px;
      background: rgba(10,14,39,0.7);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    }
    .live-badge {
      color: var(--highlight-red);
      font-weight: 700;
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 6px;
      margin-bottom: 16px;
    }
    .match-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin: 12px 0;
    }
    .team {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
    }
    .score {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--cyan-accent);
      text-shadow: 0 0 8px rgba(0,210,255,0.7);
    }
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 2.5rem;
      margin-bottom: 16px;
      font-weight: 800;
    }
    .section-desc {
      color: var(--text-secondary);
      max-width: 600px;
      margin-bottom: 48px;
      font-size: 1.1rem;
    }
    .bg-light {
      background: var(--light-bg);
    }
    .bg-dark {
      background: var(--deep-bg);
      color: #fff;
    }
    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 30px;
    }
    .service-card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: transform 0.2s, border-color 0.2s;
      color: #fff;
    }
    .service-card:hover {
      transform: translateY(-6px);
      border-color: var(--highlight-red);
    }
    .service-icon {
      font-size: 2.2rem;
      color: var(--highlight-red);
      margin-bottom: 20px;
    }
    /* 数据优势 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .adv-card {
      background: #fff;
      border-left: 4px solid var(--highlight-red);
      border-radius: var(--radius-sm);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }
    .adv-number {
      font-family: var(--font-mono);
      font-size: 2.3rem;
      color: var(--highlight-red);
      font-weight: 700;
    }
    /* 特色 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 30px;
    }
    .feature-item {
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .feature-icon {
      font-size: 2rem;
      color: var(--cyan-accent);
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      cursor: pointer;
      font-size: 1.1rem;
    }
    .faq-icon {
      color: var(--highlight-red);
      font-size: 1.4rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 150px;
      margin-top: 12px;
    }
    /* CTA */
    .cta-section {
      background: var(--deep-bg);
      text-align: center;
      padding: 80px 0;
    }
    .footer {
      background: #0A0E27;
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    .footer a {
      color: #aaa;
    }
    .copyright {
      border-top: 1px solid #2A2F45;
      margin-top: 40px;
      padding-top: 24px;
      text-align: center;
      font-size: 0.9rem;
    }
    @media (max-width: 1024px) {
      .services-grid, .advantage-grid { grid-template-columns: 1fr 1fr; }
      .hero h1 { font-size: 2.8rem; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero .container { flex-direction: column; text-align: center; }
      .hero-content { flex:1 1 auto; }
      .live-card { width: 100%; }
      .services-grid, .advantage-grid, .features-grid, .footer-grid { grid-template-columns: 1fr; }
      section { padding: 70px 0; }
    }