/* roulang page: index */
:root {
      --primary: #1B7E3D;
      --primary-hover: #15632F;
      --accent: #F5A623;
      --accent-hover: #E8930D;
      --bg: #F7F9FC;
      --card-bg: #FFFFFF;
      --text-main: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-muted: #8C8C8C;
      --border: #E8ECF0;
      --success: #2ECC71;
      --footer-bg: #2C3E50;
      --footer-text: #BDC3C7;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --transition: 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text-secondary);
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition);
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }
    /* 导航 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #ffffff;
      border-bottom: 1px solid var(--border);
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow 0.2s;
    }
    .header-shadow {
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .header-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-size: 28px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      font-size: 32px;
    }
    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      font-size: 16px;
      color: var(--text-main);
      position: relative;
      padding: 8px 0;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .btn-nav {
      background: var(--accent);
      color: white;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
    }
    .btn-nav:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--text-main);
    }
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 75%;
      max-width: 320px;
      height: 100vh;
      background: white;
      box-shadow: -5px 0 20px rgba(0,0,0,0.1);
      z-index: 200;
      display: flex;
      flex-direction: column;
      padding: 32px 24px;
      transition: right 0.35s ease;
    }
    .mobile-drawer.open {
      right: 0;
    }
    .drawer-close {
      align-self: flex-end;
      background: none;
      border: none;
      font-size: 28px;
      margin-bottom: 24px;
    }
    .drawer-menu {
      display: flex;
      flex-direction: column;
      gap: 28px;
    }
    .drawer-link {
      font-size: 20px;
      font-weight: 500;
      color: var(--text-main);
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: block; }
    }
    /* 板块间距 */
    section {
      padding: 60px 0;
    }
    @media (max-width: 768px) {
      section { padding: 40px 0; }
    }
    /* 按钮全局 */
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: background 0.25s, transform 0.25s;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: all 0.25s;
    }
    .btn-secondary:hover {
      background: #E8F5EC;
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      border: none;
      padding: 16px 40px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 18px;
      transition: background 0.25s, transform 0.25s;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
    }
    h1, h2, h3 {
      color: var(--text-main);
    }
    h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 36px;
      line-height: 1.3;
      font-weight: 600;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 22px;
      line-height: 1.4;
      font-weight: 600;
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      h3 { font-size: 20px; }
    }
    /* Hero */
    .hero-grid {
      display: flex;
      gap: 48px;
      align-items: center;
    }
    .hero-left {
      flex: 0 0 55%;
    }
    .hero-right {
      flex: 1;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin: 20px 0 32px;
    }
    .hero-actions {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-card {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .hero-card img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }
    .overlay-info {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 100%);
      color: white;
      padding: 24px;
    }
    .matchup {
      font-size: 24px;
      font-weight: 700;
    }
    .time-tag {
      font-weight: 500;
      opacity: 0.9;
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-left, .hero-right {
        width: 100%;
      }
    }
    /* 卡片通用 */
    .card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .icon-feature {
      font-size: 44px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .schedule-wrap {
      display: flex;
      gap: 32px;
    }
    .schedule-main {
      flex: 1.2;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .schedule-list {
      flex: 0.9;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .match-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--card-bg);
      border-radius: var(--radius-sm);
      padding: 16px;
      border-left: 4px solid var(--primary);
    }
    .tag {
      background: var(--accent);
      color: white;
      padding: 4px 10px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
    }
    .waterfall {
      columns: 3;
      column-gap: 20px;
    }
    .waterfall-card {
      break-inside: avoid;
      margin-bottom: 20px;
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .stats-bar {
      background: #E8F5EC;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-around;
      padding: 48px;
      text-align: center;
    }
    .stat-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--primary);
    }
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border);
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      margin-top: 12px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .cta-section {
      background: #fff;
      text-align: center;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      color: var(--footer-text);
    }
    .footer-bottom {
      border-top: 1px solid #4a6274;
      margin-top: 32px;
      padding-top: 24px;
      text-align: center;
      color: #aaa;
    }
    @media (max-width: 1024px) {
      .grid-3 { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .grid-3, .waterfall { columns: 1; display: block; }
      .schedule-wrap { flex-direction: column; }
      .stats-bar { flex-direction: column; gap: 32px; }
      .footer-grid { grid-template-columns: 1fr; }
      .waterfall-card { margin-bottom: 20px; display: block; width: 100%; }
    }