/* roulang page: index */
/* :root 设计变量 */
    :root {
      --color-bg-deep: #0B0E14;
      --color-card-bg: #1A1F2B;
      --color-primary-orange: #F0A500;
      --color-accent-cyan: #00D2A0;
      --color-text-main: #E8ECF1;
      --color-text-muted: #8A8F9C;
      --color-border: #2A2F3A;
      --color-nav-bg: rgba(11, 14, 20, 0.92);
      --radius-card: 8px;
      --radius-btn: 4px;
      --radius-hero-card: 12px;
      --shadow-card: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-glow-orange: 0 4px 16px rgba(240,165,0,0.15);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition-default: all 0.25s ease-out;
      --container-max: 1200px;
      --section-gap: 100px;
      --card-padding: 24px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--color-bg-deep);
      color: var(--color-text-main);
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      background-image: 
        linear-gradient(rgba(42,47,58,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(42,47,58,0.1) 1px, transparent 1px);
      background-size: 40px 40px;
      background-position: center center;
      overflow-x: hidden;
    }

    /* 基础重置 */
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-default);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input {
      font-family: inherit;
      border: none;
      outline: none;
    }
    ul {
      list-style: none;
    }

    /* 容器 */
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 顶部导航 (PC) */
    .desktop-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      background: var(--color-nav-bg);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--color-border);
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      padding: 0 32px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      color: var(--color-text-main);
    }
    .logo-icon {
      width: 20px;
      height: 20px;
      background: var(--color-primary-orange);
      clip-path: polygon(0% 0%, 100% 50%, 0% 100%);
      display: inline-block;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--color-text-muted);
    }
    .nav-links a {
      position: relative;
      padding: 4px 0;
    }
    .nav-links a.active {
      color: var(--color-primary-orange);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--color-primary-orange);
    }
    .nav-links a:hover {
      color: var(--color-text-main);
    }

    /* 移动端底部胶囊导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 420px;
      background: var(--color-card-bg);
      backdrop-filter: blur(20px);
      border-radius: 40px;
      padding: 8px 20px;
      z-index: 120;
      box-shadow: 0 8px 24px rgba(0,0,0,0.6);
      border: 1px solid var(--color-border);
      justify-content: space-around;
      align-items: center;
    }
    .mobile-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      color: var(--color-text-muted);
      font-size: 0.7rem;
      font-weight: 600;
      transition: var(--transition-default);
    }
    .mobile-nav-item i {
      font-size: 1.3rem;
    }
    .mobile-nav-item.active {
      color: var(--color-primary-orange);
      transform: scale(1.05);
    }

    /* 板块通用 */
    section {
      padding: var(--section-gap) 0;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--color-primary-orange);
      color: #0B0E14;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-default);
      box-shadow: 0 2px 6px rgba(240,165,0,0.3);
      letter-spacing: 0.02em;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 0 20px rgba(240,165,0,0.5);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--color-primary-orange);
      color: var(--color-primary-orange);
      font-weight: 700;
      padding: 10px 26px;
      border-radius: var(--radius-btn);
      transition: var(--transition-default);
    }
    .btn-secondary:hover {
      background: rgba(240,165,0,0.1);
      box-shadow: 0 0 12px rgba(240,165,0,0.3);
    }

    /* 卡片基础 */
    .card {
      background: var(--color-card-bg);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-card);
      padding: var(--card-padding);
      box-shadow: var(--shadow-card);
      transition: var(--transition-default);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow-orange);
      border-color: var(--color-primary-orange);
    }

    h1, h2, h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }
    h1 { font-size: 48px; }
    h2 { font-size: 36px; margin-bottom: 16px; }
    h3 { font-size: 24px; }

    .text-muted { color: var(--color-text-muted); }
    .highlight-orange { color: var(--color-primary-orange); }
    .badge-live {
      background: var(--color-accent-cyan);
      color: #0B0E14;
      font-weight: 700;
      font-size: 0.75rem;
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      min-height: 85vh;
      padding-top: 80px;
    }
    .hero-score-card {
      background: var(--color-card-bg);
      border-radius: var(--radius-hero-card);
      padding: 28px;
      border: 1px solid var(--color-border);
      box-shadow: 0 8px 30px rgba(240,165,0,0.2);
      transform: rotate(0deg);
      backdrop-filter: blur(4px);
    }
    .live-dot {
      width: 10px;
      height: 10px;
      background: var(--color-accent-cyan);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--color-accent-cyan);
    }

    @keyframes pulse-border {
      0% { border-color: var(--color-accent-cyan); box-shadow: 0 0 8px rgba(0,210,160,0.3); }
      50% { border-color: #00f7c4; box-shadow: 0 0 16px rgba(0,210,160,0.6); }
      100% { border-color: var(--color-accent-cyan); box-shadow: 0 0 8px rgba(0,210,160,0.3); }
    }
    .live-card {
      animation: pulse-border 1.8s infinite;
    }

    /* 统计数字 */
    .stat-number {
      font-size: 56px;
      font-weight: 800;
      color: var(--color-primary-orange);
      line-height: 1;
      font-variant-numeric: tabular-nums;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      h1 { font-size: 36px; }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-bottom-nav { display: flex; }
      section { padding: 64px 0; }
      h1 { font-size: 32px; }
      h2 { font-size: 24px; }
      .stat-number { font-size: 40px; }
      .container { padding: 0 20px; }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
    }

    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

    footer {
      background: #06080c;
      padding: 48px 0 24px;
      border-top: 1px solid var(--color-border);
    }