/* roulang page: index */
:root {
      --primary-deep: #1A1A1A;
      --accent-neon: #C8FF00;
      --secondary-asphalt: #3A3A3A;
      --warm-orange: #FF5E13;
      --text-light: #FFFFFF;
      --text-subtle: #F5F5F5;
      --text-dark: #0D0D0D;
      --card-dark: #2C2C2C;
      --card-light: #F0F0F0;
      --border-radius-sm: 8px;
      --border-radius-md: 12px;
      --shadow-elegant: 0 4px 20px rgba(0,0,0,0.25);
      --font-heading: "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Inter", "Roboto", sans-serif;
      --section-gap: 100px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--primary-deep);
      color: var(--text-light);
      margin: 0;
      padding: 0;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* 基础重置 */
    a, button, input {
      transition: all 0.2s ease;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    h1, h2, h3, h4, h5 {
      font-family: var(--font-heading);
      font-weight: 700;
    }

    /* 自定义容器 */
    .custom-container {
      width: 100%;
      max-width: 1320px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航分屏布局 */
    .split-nav-hero {
      display: flex;
      min-height: 100vh;
      background-color: var(--primary-deep);
      position: relative;
    }
    .nav-panel {
      width: 40%;
      background-color: var(--primary-deep);
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 3rem 2.5rem;
      border-right: 1px solid rgba(200,255,0,0.15);
      z-index: 10;
    }
    .hero-panel {
      width: 60%;
      background-image: url('/assets/images/backpic/hero-sport.jpg');
      background-size: cover;
      background-position: center;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: flex-start;
      padding: 3rem;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0.65);
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 600px;
      text-align: left;
    }
    .logo-brand {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--accent-neon);
      letter-spacing: -0.5px;
      margin-bottom: 3rem;
      display: inline-block;
    }
    .nav-menu {
      list-style: none;
      padding: 0;
      margin: 2rem 0;
    }
    .nav-menu li {
      margin-bottom: 1.25rem;
    }
    .nav-menu a {
      font-size: 1.25rem;
      font-weight: 500;
      color: #CCCCCC;
      display: inline-block;
      padding: 0.25rem 0;
      border-bottom: 3px solid transparent;
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--accent-neon);
      border-bottom-color: var(--accent-neon);
    }
    .nav-cta-btn {
      background: var(--accent-neon);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--border-radius-sm);
      font-size: 1.1rem;
      display: inline-block;
      margin-top: 2rem;
      border: none;
      text-align: center;
    }
    .nav-cta-btn:hover {
      background: #E0FF33;
      box-shadow: 0 8px 20px rgba(200,255,0,0.35);
      transform: translateY(-2px);
      color: var(--primary-deep);
    }

    .hero-title {
      font-size: clamp(2.8rem, 5.5vw, 4.5rem);
      font-weight: 900;
      color: white;
      line-height: 1.15;
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      font-size: 1.35rem;
      color: var(--text-subtle);
      margin-bottom: 2.5rem;
      font-weight: 400;
    }
    .hero-btn {
      background: transparent;
      border: 2px solid var(--accent-neon);
      color: var(--accent-neon);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--border-radius-sm);
      font-size: 1.1rem;
      display: inline-block;
    }
    .hero-btn:hover {
      background: var(--accent-neon);
      color: var(--primary-deep);
      border-color: var(--accent-neon);
      transform: translateY(-2px);
    }

    /* 区块标题统一样式 */
    .section-title {
      font-size: 2.4rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: white;
      text-align: left;
    }
    .section-subtitle {
      font-size: 1.1rem;
      color: #cccccc;
      margin-bottom: 3rem;
    }

    /* 数据看板卡片 */
    .data-card {
      background: var(--card-dark);
      border-radius: var(--border-radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-elegant);
      text-align: left;
      transition: transform 0.2s;
      height: 100%;
    }
    .data-card:hover {
      transform: translateY(-5px);
    }
    .data-number {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--accent-neon);
      text-shadow: 0 0 8px rgba(200,255,0,0.6);
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .data-unit {
      font-size: 1.2rem;
      font-weight: 500;
      color: #aaa;
      margin-left: 4px;
    }
    .trend-icon {
      color: var(--warm-orange);
      margin-left: 8px;
      font-size: 1.25rem;
    }
    .data-desc {
      color: #ccc;
      margin-top: 10px;
      font-size: 0.95rem;
    }

    /* 服务卡片 */
    .service-card {
      background: var(--card-light);
      border-radius: var(--border-radius-md);
      padding: 2rem 1.5rem;
      color: var(--text-dark);
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      transition: all 0.25s ease;
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 18px 30px rgba(0,0,0,0.2);
    }
    .service-icon {
      font-size: 2.4rem;
      color: var(--accent-neon);
      background: var(--primary-deep);
      width: 60px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      margin-bottom: 1.5rem;
    }
    .service-card h3 {
      font-weight: 700;
      font-size: 1.5rem;
      margin-bottom: 0.8rem;
    }
    .service-link {
      color: var(--primary-deep);
      font-weight: 700;
      margin-top: 1rem;
      display: inline-block;
    }
    .service-link i {
      margin-left: 4px;
      transition: transform 0.2s;
    }
    .service-card:hover .service-link i {
      transform: translateX(4px);
    }

    /* 对比表格 */
    .compare-table {
      background: var(--secondary-asphalt);
      border-radius: var(--border-radius-md);
      padding: 2rem;
    }
    .compare-row {
      display: flex;
      border-bottom: 1px solid #555;
      padding: 1rem 0;
    }
    .compare-row:last-child {
      border-bottom: none;
    }
    .compare-label {
      width: 30%;
      font-weight: 600;
      color: #ddd;
    }
    .compare-left {
      width: 35%;
      color: #aaa;
    }
    .compare-right {
      width: 35%;
      color: var(--accent-neon);
      font-weight: 600;
    }

    /* FAQ 手风琴覆盖 */
    .accordion-button {
      background-color: #2C2C2C !important;
      color: white !important;
      font-weight: 600;
      border-left: 4px solid var(--accent-neon);
      border-radius: 0 !important;
      box-shadow: none;
      padding: 1.2rem 1.5rem;
    }
    .accordion-button:not(.collapsed) {
      background-color: #1e1e1e !important;
      border-left-color: var(--warm-orange);
      color: white !important;
    }
    .accordion-item {
      background: transparent;
      border: 1px solid #444;
      margin-bottom: 12px;
      border-radius: 8px;
    }
    .accordion-body {
      background: #1e1e1e;
      color: #ddd;
      font-size: 0.95rem;
      line-height: 1.8;
    }

    /* 表单 */
    .contact-form input {
      background: #2C2C2C;
      border: 1px solid #555;
      color: white;
      border-radius: 8px;
      padding: 12px 16px;
      width: 100%;
    }
    .contact-form input:focus {
      border-color: var(--accent-neon);
      box-shadow: 0 0 0 2px rgba(200,255,0,0.25);
      outline: none;
    }
    .submit-btn {
      background: var(--accent-neon);
      color: #1A1A1A;
      font-weight: 700;
      border: none;
      padding: 12px 28px;
      border-radius: 8px;
      width: 100%;
    }
    .submit-btn:hover {
      background: #E0FF33;
    }

    /* 页脚 */
    .footer a {
      color: #999;
    }
    .footer a:hover {
      color: var(--accent-neon);
    }

    /* 响应式 */
    @media (max-width: 992px) {
      .split-nav-hero {
        flex-direction: column;
      }
      .nav-panel, .hero-panel {
        width: 100%;
      }
      .nav-panel {
        padding: 2rem 1.5rem;
        border-right: none;
        border-bottom: 1px solid #333;
      }
      .hero-panel {
        min-height: 70vh;
      }
    }
    @media (max-width: 768px) {
      .section-title {
        font-size: 2rem;
      }
      .compare-label, .compare-left, .compare-right {
        width: auto;
        display: block;
      }
      .compare-row {
        flex-wrap: wrap;
      }
    }