/* roulang page: index */
/* ----- 全局设计变量与基础重置 ----- */
    :root {
      --primary-red: #E63946;
      --deep-black: #0B0C10;
      --titanium-gray: #1F2833;
      --neon-cyan: #45A29E;
      --white: #FFFFFF;
      --light-gray: #C5C6C7;
      --border-light: rgba(255,255,255,0.08);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.5);
      --radius-sm: 4px;
      --radius-md: 8px;
      --transition: all 0.25s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "Inter", "Roboto", sans-serif;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-black);
      color: var(--light-gray);
      line-height: 1.8;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, input, textarea {
      font-family: inherit;
      outline: none;
      border: none;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 板块间距 */
    section {
      padding: 100px 0;
    }
    
    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      h1 { font-size: 2rem !important; }
      h2 { font-size: 1.8rem !important; }
    }
    
    h1, h2, h3 {
      color: var(--white);
      font-weight: 700;
      line-height: 1.3;
    }
    
    h1 {
      font-size: 3rem;
      letter-spacing: -0.5px;
    }
    
    h2 {
      font-size: 2.2rem;
      margin-bottom: 2rem;
      position: relative;
      display: inline-block;
    }
    
    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }
    
    .text-number {
      font-family: var(--font-mono);
      font-weight: 800;
      font-size: 2.5rem;
      color: var(--neon-cyan);
    }
    
    /* ----- 导航栏 (创作者平台风格) ----- */
    .site-header {
      background: var(--deep-black);
      border-bottom: 1px solid var(--titanium-gray);
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--white);
    }
    
    .logo i {
      color: var(--primary-red);
      font-size: 1.8rem;
    }
    
    .logo span {
      color: var(--primary-red);
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      margin: 0;
      font-size: 0.95rem;
    }
    
    .nav-links a {
      color: var(--light-gray);
      padding: 0.5rem 0;
      border-bottom: 2px solid transparent;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
      border-bottom-color: var(--neon-cyan);
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    
    .search-icon {
      color: var(--light-gray);
      font-size: 1.2rem;
      cursor: pointer;
      transition: var(--transition);
    }
    
    .search-icon:hover {
      color: var(--neon-cyan);
    }
    
    .btn-login {
      background: transparent;
      border: 1px solid var(--titanium-gray);
      color: var(--white);
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
    }
    
    .btn-login:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }
    
    .btn-cta-nav {
      background: var(--primary-red);
      color: var(--white);
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 0 8px rgba(230,57,70,0.4);
    }
    
    .btn-cta-nav:hover {
      background: #C1121F;
      box-shadow: 0 0 16px rgba(230,57,70,0.7);
    }
    
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--white);
      cursor: pointer;
      background: none;
      border: none;
    }
    
    @media (max-width: 1024px) {
      .nav-links, .nav-actions .btn-login, .nav-actions .btn-cta-nav {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: var(--deep-black);
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        padding: 20px 24px;
        border-bottom: 1px solid var(--titanium-gray);
        gap: 16px;
      }
      .mobile-menu.active {
        display: flex;
      }
    }
    
    /* ----- 按钮系统 ----- */
    .btn-primary {
      background: var(--primary-red);
      color: var(--white);
      padding: 12px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      display: inline-block;
      transition: var(--transition);
      text-align: center;
    }
    
    .btn-primary:hover {
      background: #C1121F;
      box-shadow: 0 0 14px rgba(230,57,70,0.6);
      color: var(--white);
    }
    
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--titanium-gray);
      color: var(--white);
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      transition: var(--transition);
    }
    
    .btn-secondary:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }
    
    /* ----- Hero 区域 ----- */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    
    .hero-bg-visual {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 380px;
      border-radius: var(--radius-md);
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    
    .hero-overlay {
      background: rgba(11,12,16,0.75);
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-family: var(--font-mono);
      font-size: 2rem;
      backdrop-filter: blur(2px);
    }
    
    .hero-stats {
      display: flex;
      gap: 24px;
      margin: 24px 0;
    }
    
    .hero-stat-item {
      font-weight: 700;
      color: var(--light-gray);
    }
    
    .hero-stat-item strong {
      color: var(--primary-red);
      font-size: 1.3rem;
    }
    
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-bg-visual {
        order: -1;
        min-height: 250px;
      }
    }
    
    /* ----- 实时指标看板 ----- */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    
    .stat-card {
      background: var(--titanium-gray);
      padding: 2rem 1.5rem;
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px solid var(--border-light);
    }
    
    .stat-number {
      font-family: var(--font-mono);
      font-weight: 800;
      font-size: 2.8rem;
      color: var(--primary-red);
    }
    
    .stat-label {
      color: var(--light-gray);
      margin-top: 8px;
    }
    
    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    
    /* ----- 核心服务矩阵 (竖线卡片) ----- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    
    .service-card {
      background: var(--titanium-gray);
      padding: 2rem 1.8rem;
      border-radius: var(--radius-md);
      border-left: 3px solid var(--primary-red);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      position: relative;
    }
    
    .service-card:nth-child(2) {
      border-left-color: var(--neon-cyan);
    }
    
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 28px rgba(0,0,0,0.7);
    }
    
    .service-index {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      opacity: 0.7;
      margin-bottom: 12px;
    }
    
    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }
    
    /* ----- 赛事对比表 ----- */
    .compare-table {
      width: 100%;
      background: var(--deep-black);
      border-collapse: collapse;
    }
    
    .compare-table th {
      text-align: left;
      padding: 16px 12px;
      color: var(--white);
      font-weight: 600;
      border-bottom: 1px solid var(--titanium-gray);
    }
    
    .compare-table td {
      padding: 14px 12px;
      border-bottom: 1px solid rgba(31,40,51,0.7);
    }
    
    .highlight-tvt {
      color: var(--primary-red);
      font-weight: 700;
    }
    
    /* ----- FAQ 折叠面板 ----- */
    .accordion {
      background: transparent;
    }
    
    .accordion-item {
      background: var(--titanium-gray);
      margin-bottom: 12px;
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    
    .accordion-title {
      background: var(--titanium-gray);
      color: var(--white);
      font-weight: 600;
      padding: 16px 24px;
      border-left: 4px solid var(--neon-cyan);
      cursor: pointer;
      transition: var(--transition);
    }
    
    .accordion-title:hover {
      background: #2a333d;
    }
    
    .accordion-content {
      background: #1a2129;
      color: var(--light-gray);
      padding: 0 24px 16px;
    }
    
    /* ----- 转化表单 ----- */
    .contact-card {
      background: var(--titanium-gray);
      max-width: 640px;
      margin: 0 auto;
      padding: 2.5rem;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
    }
    
    .input-field {
      background: var(--deep-black);
      border-bottom: 2px solid var(--primary-red);
      color: var(--white);
      padding: 12px 16px;
      width: 100%;
      margin-bottom: 24px;
      border-radius: 0;
      transition: var(--transition);
    }
    
    .input-field:focus {
      border-bottom-color: var(--neon-cyan);
      box-shadow: 0 2px 8px rgba(69,162,158,0.3);
    }
    
    /* ----- 页脚 ----- */
    .site-footer {
      background: var(--deep-black);
      border-top: 1px solid var(--titanium-gray);
      padding: 48px 0 24px;
    }
    
    .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 var(--titanium-gray);
      margin-top: 32px;
      padding-top: 20px;
      text-align: center;
      color: var(--light-gray);
      font-size: 0.9rem;
    }