/* roulang page: index */
:root {
      --primary-deep-blue: #1A2B4C;
      --accent-red: #E94E3C;
      --accent-gold: #F5A623;
      --bg-light: #F8F9FC;
      --card-bg: #FFFFFF;
      --text-primary: #1E293B;
      --text-secondary: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 16px rgba(26, 43, 76, 0.06);
      --shadow-hover: 0 8px 24px rgba(26, 43, 76, 0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition-base: all 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --font-mono: "Inter", "SF Pro Display", "Helvetica Neue", system-ui;
      --header-height: 64px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      color: var(--text-primary);
      background-color: var(--bg-light);
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      line-height: 1.25;
      color: var(--text-primary);
    }

    h1 {
      font-size: clamp(2.5rem, 5vw, 3.5rem);
      font-weight: 800;
      letter-spacing: -0.5px;
    }

    h2 {
      font-size: clamp(2rem, 4vw, 2.4rem);
      margin-bottom: 0.75rem;
      font-weight: 700;
    }

    h3 {
      font-size: 1.35rem;
      color: var(--text-secondary);
      font-weight: 500;
      margin-bottom: 1rem;
    }

    h4 {
      font-size: 1.25rem;
      font-weight: 650;
      margin-bottom: 0.5rem;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }

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

    .container {
      max-width: 1200px;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
      margin: 0 auto;
    }

    /* 自定义 Bootstrap 覆盖 */
    .btn {
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.5px;
      transition: var(--transition-base);
      border: 2px solid transparent;
      line-height: 1.4;
    }

    .btn-primary-custom {
      background-color: var(--accent-red);
      color: #fff;
      border: 2px solid var(--accent-red);
    }
    .btn-primary-custom:hover, .btn-primary-custom:focus {
      background-color: #C0392B;
      border-color: #C0392B;
      color: #fff;
      transform: scale(1.03);
      box-shadow: 0 6px 16px rgba(233, 78, 60, 0.3);
    }

    .btn-outline-accent {
      background: transparent;
      color: var(--accent-red);
      border: 2px solid var(--accent-red);
    }
    .btn-outline-accent:hover, .btn-outline-accent:focus {
      background-color: rgba(233, 78, 60, 0.05);
      color: var(--accent-red);
      border-color: var(--accent-red);
    }

    .btn-ghost-white {
      background: transparent;
      color: #fff;
      border: 2px solid #fff;
    }
    .btn-ghost-white:hover {
      background: rgba(255,255,255,0.15);
      color: #fff;
    }

    .card-custom {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: none;
      padding: 2rem 1.8rem;
      height: 100%;
      transition: var(--transition-base);
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .section-padding {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
    }

    /* 导航栏 */
    .navbar-esports {
      background: #fff;
      height: var(--header-height);
      box-shadow: 0 2px 10px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 1020;
      transition: var(--transition-base);
    }
    .navbar-esports.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    }
    .logo-text {
      font-family: var(--font-sans);
      font-weight: 800;
      font-size: 1.8rem;
      color: var(--primary-deep-blue);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
    }
    .logo-icon {
      display: inline-block;
      width: 24px;
      height: 24px;
      background: var(--accent-red);
      clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
      margin-left: 2px;
      transform: rotate(180deg);
    }
    .nav-link-anchor {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-primary);
      margin: 0 0.6rem;
      padding: 0.5rem 0.2rem;
      position: relative;
      transition: var(--transition-base);
    }
    .nav-link-anchor:hover, .nav-link-anchor.active {
      color: var(--accent-red);
    }
    .nav-link-anchor.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-red);
    }
    .navbar-toggler {
      border: none;
      padding: 0.5rem;
    }
    .mobile-menu {
      background: #fff;
      padding: 1rem 0;
    }

    /* Hero */
    #hero {
      background: var(--bg-light);
      min-height: 80vh;
      display: flex;
      align-items: center;
      background-image: radial-gradient(circle at 20% 30%, rgba(26,43,76,0.02) 0%, transparent 40%);
    }
    .hero-img-placeholder {
      background: linear-gradient(135deg, #E2E8F0 0%, #CBD5E1 100%);
      border-radius: 24px;
      width: 100%;
      height: 380px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      box-shadow: 0 20px 35px rgba(0,0,0,0.08);
    }

    /* 功能卡片修饰 */
    .feature-card-left-border {
      border-left: 4px solid var(--accent-red);
      padding-left: 1.5rem;
      border-radius: 0 var(--radius-card) var(--radius-card) 0;
    }

    /* 数据卡片 */
    .stat-number {
      font-family: var(--font-mono);
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-gold);
      line-height: 1.1;
    }

    /* 价格卡片高亮 */
    .pricing-highlight {
      border: 2px solid var(--accent-red);
      position: relative;
      transform: scale(1.02);
    }
    .badge-recommend {
      background: var(--accent-red);
      color: #fff;
      font-size: 0.75rem;
      padding: 0.3rem 1rem;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      font-weight: 600;
      letter-spacing: 0.3px;
    }

    /* FAQ 手风琴 */
    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--accent-red);
      box-shadow: none;
      border-left: 3px solid var(--accent-red);
    }
    .accordion-button {
      font-weight: 600;
      font-size: 1.1rem;
      padding: 1.2rem 1rem;
      background: #fff;
      border: none;
      box-shadow: none;
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      margin-bottom: 0.25rem;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--accent-red);
      background-image: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.1) 0%, transparent 40%);
    }

    /* 页脚 */
    .footer-dark {
      background: var(--primary-deep-blue);
      color: #CBD5E1;
    }
    .footer-dark a {
      color: #CBD5E1;
    }
    .footer-dark a:hover {
      color: #fff;
    }

    @media (max-width: 767.98px) {
      .navbar-esports .container {
        flex-wrap: nowrap;
      }
    }