/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-red: #FF4655;
      --bg-light: #F5F5F7;
      --white: #FFFFFF;
      --text-dark: #1E1E2A;
      --text-body: #4A4A5A;
      --text-muted: #8E8E9E;
      --border-light: #E5E5EA;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --transition-base: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }

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

    /* 排版与基础 */
    h1, h2, h3, .h2 {
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 48px;
      line-height: 1.15;
    }

    h2 {
      font-size: 36px;
      margin-bottom: 0.5rem;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
    }

    p {
      margin-bottom: 1rem;
      color: var(--text-body);
    }

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

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: transparent;
    }

    /* 导航栏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 100;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      transition: var(--transition-base);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 26px;
    }
    .domain-tag {
      font-size: 12px;
      font-weight: 400;
      color: rgba(255,255,255,0.6);
      margin-left: 2px;
      align-self: flex-end;
      padding-bottom: 2px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 15px;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition-base);
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
      border-bottom-color: var(--accent-cyan);
    }

    .menu-toggle {
      display: none;
      font-size: 26px;
      color: var(--white);
      background: transparent;
      border: none;
    }

    /* Hero 区域 */
    .hero {
      padding: 140px 0 100px;
      background: linear-gradient(135deg, #0A0E27 0%, #121738 100%);
      position: relative;
      overflow: hidden;
      min-height: 90vh;
      display: flex;
      align-items: center;
    }
    .hero-bg {
      position: absolute;
      right: -10%;
      top: 0;
      width: 55%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.35;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.8) 0%, transparent 95%);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.8) 0%, transparent 95%);
      z-index: 0;
    }
    .hero .container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .hero-content {
      color: var(--white);
    }
    .hero h1 {
      color: var(--white);
      font-size: 52px;
      margin-bottom: 24px;
      line-height: 1.2;
    }
    .hero-highlight {
      color: var(--accent-cyan);
    }
    .hero p {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 32px;
      max-width: 480px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: var(--transition-base);
      box-shadow: 0 0 18px rgba(0,240,255,0.25);
      border: none;
    }
    .btn-primary:hover {
      background: #33F5FF;
      box-shadow: 0 0 24px rgba(0,240,255,0.5);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: var(--transition-base);
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
      border-color: #33F5FF;
    }
    .hero-visual {
      position: relative;
      z-index: 1;
      display: flex;
      justify-content: center;
    }
    .hero-visual img {
      max-height: 380px;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5));
      border-radius: 20px;
      opacity: 0.9;
    }

    /* 通用板块 */
    .section {
      padding: 80px 0;
    }
    .section-dark {
      background: #0A0E27;
      color: rgba(255,255,255,0.8);
    }
    .section-dark h2, .section-dark h3 {
      color: var(--white);
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      margin-bottom: 8px;
    }
    .subtitle {
      color: var(--text-muted);
      font-size: 17px;
    }

    /* 核心优势 - 不对称布局 */
    .advantage-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .advantage-image {
      background: url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      height: 380px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-hover);
    }
    .advantage-stack {
      display: flex;
      flex-direction: column;
      gap: 28px;
    }
    .adv-item {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      border-left: 4px solid transparent;
    }
    .adv-item:hover {
      box-shadow: var(--shadow-hover);
      border-left-color: var(--accent-cyan);
      transform: translateY(-2px);
    }
    .adv-item i {
      font-size: 30px;
      color: var(--accent-cyan);
      margin-bottom: 12px;
    }

    /* 赛事服务卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-card i {
      font-size: 32px;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }

    /* 使用场景交替布局 */
    .scene-row {
      display: flex;
      align-items: center;
      gap: 48px;
      margin-bottom: 64px;
    }
    .scene-row.reverse {
      flex-direction: row-reverse;
    }
    .scene-img {
      flex: 1;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .scene-text {
      flex: 1;
    }

    /* 案例卡片 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 30px;
    }
    .case-card {
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-img {
      height: 220px;
      background-size: cover;
      background-position: center;
    }
    .case-info {
      padding: 20px;
    }
    .stat {
      color: var(--accent-red);
      font-weight: 700;
      font-size: 24px;
    }

    /* FAQ */
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      background: #FAFAFA;
    }
    .faq-answer {
      padding: 0 24px 18px;
      display: none;
      color: var(--text-body);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question {
      border-left: 4px solid var(--accent-cyan);
    }

    /* CTA 横幅 */
    .cta-band {
      background: #0A0E27;
      padding: 60px 0;
      text-align: center;
    }
    .btn-red {
      background: var(--accent-red);
      color: white;
      padding: 16px 40px;
      font-weight: 700;
      border-radius: var(--radius-btn);
      transition: 0.2s;
    }
    .btn-red:hover {
      background: #ff5e6b;
    }

    /* 页脚 */
    .footer {
      background: #0A0E27;
      color: #CCC;
      padding: 60px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
    }
    .footer a:hover {
      color: var(--accent-cyan);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 40px; }
      .hero .container { grid-template-columns: 1fr; }
      .hero-visual { display: none; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .advantage-grid, .service-grid, .case-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .scene-row, .scene-row.reverse {
        flex-direction: column;
      }
    }