/* roulang page: index */
/* ----- 设计变量 ----- */
    :root {
      --deep-bg: #0D0B1E;
      --card-bg: rgba(30, 27, 46, 0.8);
      --primary-purple: #A855F7;
      --neon-cyan: #00F0FF;
      --warm-gold: #F59E0B;
      --text-white: #FFFFFF;
      --text-gray: #B0ADC4;
      --border-glow: 0 0 15px rgba(168, 85, 247, 0.3);
      --radius-card: 20px;
      --radius-btn: 12px;
      --transition: 0.25s ease-in-out;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
    }

    /* ----- 全局重置 ----- */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      background-color: var(--deep-bg);
      color: var(--text-gray);
      font-family: var(--font-sans);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 排版 */
    h1, h2, h3 {
      color: var(--text-white);
      font-weight: 700;
      letter-spacing: -0.3px;
    }

    h1 {
      font-size: clamp(2.5rem, 6vw, 3.5rem);
      line-height: 1.3;
      margin-bottom: 1.2rem;
    }

    h2 {
      font-size: clamp(2rem, 5vw, 2.5rem);
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 1.4rem;
      margin-bottom: 0.7rem;
    }

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

    a:hover {
      color: var(--primary-purple);
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      transition: all var(--transition);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }

    /* ----- 导航栏 ----- */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(13, 11, 30, 0.8);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 0;
    }

    .logo {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--text-white);
      background: linear-gradient(135deg, var(--neon-cyan), var(--primary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-gray);
      font-weight: 500;
      position: relative;
      padding: 6px 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--neon-cyan);
      transition: width var(--transition);
      box-shadow: 0 0 6px var(--neon-cyan);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple), var(--neon-cyan));
      color: #fff;
      padding: 12px 28px;
      box-shadow: 0 6px 20px rgba(168, 85, 247, 0.4);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(0, 240, 255, 0.5);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 12px 28px;
    }

    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--primary-purple);
      color: var(--primary-purple);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
    }

    .hamburger span {
      width: 28px;
      height: 2px;
      background: var(--neon-cyan);
      transition: var(--transition);
      box-shadow: 0 0 5px var(--neon-cyan);
    }

    /* ----- 首屏 Hero ----- */
    .hero {
      padding: 140px 0 100px;
      display: flex;
      align-items: center;
      gap: 3rem;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(13,11,30,0.9) 40%, rgba(13,11,30,0.5));
    }

    .hero-content {
      position: relative;
      flex: 1;
    }

    .hero-visual {
      position: relative;
      flex: 1;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .data-badge {
      background: rgba(13, 11, 30, 0.8);
      backdrop-filter: blur(8px);
      border: 1px solid var(--neon-cyan);
      border-radius: 30px;
      padding: 12px 24px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 2rem;
      color: var(--text-white);
      font-weight: 600;
      box-shadow: 0 0 20px rgba(0,240,255,0.2);
    }

    .live-dot {
      width: 12px;
      height: 12px;
      background: var(--neon-cyan);
      border-radius: 50%;
      animation: pulse 1.5s infinite;
      box-shadow: 0 0 10px var(--neon-cyan);
    }

    @keyframes pulse {
      0% { opacity: 0.7; transform: scale(1); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.7; transform: scale(1); }
    }

    .mock-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(168, 85, 247, 0.4);
      border-radius: 24px;
      padding: 24px;
      width: 100%;
      box-shadow: var(--border-glow);
    }

    .match-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .team {
      font-weight: 700;
      color: var(--text-white);
    }

    .score {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--warm-gold);
      text-shadow: 0 0 8px rgba(245,158,11,0.6);
      font-variant-numeric: tabular-nums;
    }

    .progress-bar {
      height: 6px;
      background: rgba(255,255,255,0.2);
      border-radius: 6px;
      margin: 10px 0;
      overflow: hidden;
    }

    .progress-fill {
      width: 68%;
      height: 100%;
      background: var(--neon-cyan);
      box-shadow: 0 0 12px var(--neon-cyan);
      border-radius: 6px;
    }

    .status-tag {
      font-size: 0.8rem;
      padding: 4px 12px;
      border-radius: 20px;
      background: rgba(0,240,255,0.15);
      color: var(--neon-cyan);
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

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

    .section-header {
      text-align: center;
      margin-bottom: 60px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .card {
      background: var(--card-bg);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid rgba(168, 85, 247, 0.25);
      transition: all var(--transition);
      box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }

    .card:hover {
      transform: translateY(-6px);
      border-color: var(--neon-cyan);
      box-shadow: 0 12px 30px rgba(0,240,255,0.2);
    }

    /* 不对称栅格优势 */
    .feature-alt {
      display: grid;
      grid-template-columns: 1fr 1.5fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
    }

    .feature-alt.reverse {
      grid-template-columns: 1.5fr 1fr;
    }

    .icon-box {
      font-size: 2.4rem;
      color: var(--neon-cyan);
      margin-bottom: 20px;
    }

    .number-highlight {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--warm-gold);
      line-height: 1.2;
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: var(--card-bg);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 16px;
      margin-bottom: 16px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      color: var(--text-white);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: none;
      width: 100%;
      text-align: left;
    }

    .faq-answer {
      padding: 0 28px 20px;
      color: var(--text-gray);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, rgba(168,85,247,0.2), rgba(0,240,255,0.1));
      border: 1px solid var(--neon-cyan);
      border-radius: 32px;
      padding: 60px;
      text-align: center;
    }

    /* 页脚 */
    .footer {
      border-top: 1px solid rgba(0,240,255,0.2);
      padding: 40px 0 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      color: var(--text-gray);
    }

    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .feature-alt, .feature-alt.reverse {
        grid-template-columns: 1fr;
      }
      .hero {
        flex-direction: column;
        padding: 120px 24px 60px;
      }
      .nav-links { display: none; }
      .hamburger { display: flex; }
    }

    @media (max-width: 768px) {
      .grid-2, .grid-3 { grid-template-columns: 1fr; }
    }