/* roulang page: index */
/* ----- 设计变量 ----- */
    :root {
      --primary-deep: #0A0E1A;
      --accent-cyan: #00E5FF;
      --accent-red: #FF4655;
      --accent-gold: #FFD166;
      --card-bg: rgba(255, 255, 255, 0.04);
      --card-border: rgba(255, 255, 255, 0.08);
      --text-primary: #FFFFFF;
      --text-secondary: #B0B8C5;
      --text-muted: #6B7280;
      --glass-blur: blur(16px);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
      --shadow-glow: 0 0 24px rgba(0, 229, 255, 0.6);
      --transition: all 0.25s ease;
      --max-width: 1280px;
      --header-height: 64px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--primary-deep);
    }

    body {
      font-family: 'PingFang SC', 'Noto Sans SC', 'MiSans', system-ui, -apple-system, 'Segoe UI', sans-serif;
      background-color: var(--primary-deep);
      color: var(--text-primary);
      line-height: 1.6;
      font-size: 15px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      padding-top: var(--header-height);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    button, input {
      font-family: inherit;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }

    /* ----- 头部导航（沉浸式玻璃） ----- */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      background: rgba(10, 14, 26, 0.82);
      backdrop-filter: var(--glass-blur);
      -webkit-backdrop-filter: var(--glass-blur);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      z-index: 100;
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 1.8rem;
    }
    .logo span {
      border-bottom: 2px solid var(--accent-cyan);
      padding-bottom: 4px;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 4px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
    }
    .nav-links a:hover {
      color: #fff;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .btn-nav {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: white;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-weight: 500;
      transition: var(--transition);
      cursor: pointer;
      font-size: 0.9rem;
    }
    .btn-nav:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 26, 0.92);
      backdrop-filter: blur(20px);
      border-top: 1px solid rgba(255,255,255,0.05);
      z-index: 99;
      padding: 8px 16px;
      justify-content: space-around;
      align-items: center;
    }
    .mobile-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-muted);
      font-size: 0.7rem;
      gap: 4px;
      transition: var(--transition);
    }
    .mobile-nav-item i {
      font-size: 1.3rem;
    }
    .mobile-nav-item.active {
      color: var(--accent-cyan);
    }

    @media (max-width: 768px) {
      .nav-links, .btn-nav {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
      }
      body {
        padding-bottom: 70px;
      }
    }

    /* ----- 按钮系统 ----- */
    .btn-primary {
      background: var(--accent-cyan);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0,229,255,0.2);
    }
    .btn-primary:hover {
      box-shadow: var(--shadow-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.35);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    /* ----- Hero 双栏杂志流 ----- */
    .hero {
      padding: 60px 0 80px;
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-left {
      flex: 1 1 55%;
    }
    .hero-right {
      flex: 1 1 45%;
      background: linear-gradient(135deg, rgba(0,229,255,0.08) 0%, rgba(10,14,26,0.9) 100%);
      border-radius: var(--radius-lg);
      padding: 20px;
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,255,255,0.1);
    }
    h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .live-score-card {
      background: rgba(0,0,0,0.5);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid rgba(0,229,255,0.25);
    }
    .match-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .team {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }
    .team-avatar {
      width: 56px;
      height: 56px;
      background: rgba(255,255,255,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.8rem;
    }
    .score-display {
      font-family: 'Red Hat Display', monospace;
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent-cyan);
      text-shadow: 0 0 12px rgba(0,229,255,0.7);
    }
    .match-progress {
      margin-top: 18px;
      height: 4px;
      background: rgba(255,255,255,0.15);
      border-radius: 4px;
      overflow: hidden;
    }
    .progress-fill {
      width: 68%;
      height: 100%;
      background: var(--accent-cyan);
      animation: pulse-progress 1.8s infinite;
    }
    @keyframes pulse-progress {
      0% { opacity: 0.9; }
      50% { opacity: 1; box-shadow: 0 0 8px var(--accent-cyan); }
    }
    @media (max-width: 768px) {
      .hero {
        flex-direction: column;
        padding: 30px 0 40px;
      }
      h1 {
        font-size: 2rem;
      }
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    h2 {
      font-size: 2rem;
      font-weight: 600;
      margin-bottom: 1rem;
      letter-spacing: -0.3px;
    }
    .section-desc {
      color: var(--text-secondary);
      margin-bottom: 2.5rem;
    }

    /* 核心亮点网格 2x3 不规则 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      transition: var(--transition);
    }
    .feature-card:hover {
      border-color: rgba(0,229,255,0.35);
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.5);
    }
    .feature-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }
    @media (max-width: 768px) {
      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 实时战报瀑布 */
    .live-feed {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .match-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(8px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }
    .match-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 16px rgba(0,229,255,0.2);
    }
    .badge-live {
      background: var(--accent-red);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
    }

    /* 方案对比三列 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .plan-card {
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(12px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      transition: var(--transition);
    }
    .plan-card.featured {
      border-color: var(--accent-cyan);
      background: rgba(0,229,255,0.04);
      transform: scale(1.02);
    }
    @media (max-width: 768px) {
      .pricing-grid {
        grid-template-columns: 1fr;
        overflow-x: auto;
        display: flex;
        gap: 16px;
      }
      .plan-card {
        min-width: 260px;
      }
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    .faq-item.open {
      border-color: var(--accent-cyan);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, rgba(0,229,255,0.07), rgba(10,14,26,0.9));
      border-radius: var(--radius-lg);
      padding: 56px 32px;
      text-align: center;
      border: 1px solid rgba(255,255,255,0.1);
    }
    .inline-form {
      display: flex;
      max-width: 480px;
      margin: 24px auto 0;
      gap: 8px;
    }
    .inline-form input {
      flex: 1;
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-pill);
      padding: 14px 20px;
      color: white;
      outline: none;
    }
    .inline-form input:focus {
      border-color: var(--accent-cyan);
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.08);
      margin-top: 32px;
      padding-top: 20px;
      text-align: center;
      color: var(--text-muted);
    }