/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-pink: #FF3366;
      --accent-gold: #FFB800;
      --bg-light: #F5F6FA;
      --bg-dark: #0A0E27;
      --bg-card: #FFFFFF;
      --text-dark: #2E3856;
      --text-muted: #6F7A95;
      --text-light: #B0B8D0;
      --border-light: rgba(10, 14, 39, 0.08);
      --shadow-sm: 0 2px 16px rgba(10, 14, 39, 0.06);
      --shadow-hover: 0 8px 30px rgba(10, 14, 39, 0.12);
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-mono: "Inter", "Roboto", sans-serif;
      --transition: 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-dark);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      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, input, textarea {
      font-family: inherit;
    }

    /* 导航栏 */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: white;
      border-bottom: 1px solid var(--border-light);
      height: 72px;
      display: flex;
      align-items: center;
      transition: box-shadow var(--transition);
    }

    .header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-deep);
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: conic-gradient(from 90deg at 50% 50%, var(--accent-cyan), var(--accent-pink), var(--accent-cyan));
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: bold;
    }

    .nav-menu {
      display: flex;
      gap: 2rem;
      list-style: none;
    }

    .nav-menu a {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.5rem 0;
      position: relative;
      white-space: nowrap;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width var(--transition);
    }

    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary-deep);
    }

    .nav-menu a:hover::after, .nav-menu a.active::after {
      width: 100%;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      transition: all var(--transition);
      border: none;
      cursor: pointer;
      background: transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--accent-cyan);
      color: var(--primary-deep);
      box-shadow: 0 4px 12px rgba(0,240,255,0.3);
    }

    .btn-primary:hover {
      background: #33f5ff;
      box-shadow: 0 6px 18px rgba(0,240,255,0.45);
    }

    .btn-outline {
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      background: transparent;
    }

    .btn-outline:hover {
      background: rgba(0,240,255,0.08);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--primary-deep);
      transition: var(--transition);
    }

    /* 移动端导航 */
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 1.5rem 2rem;
        gap: 1.2rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        transform: translateY(-120%);
        opacity: 0;
        transition: 0.3s ease;
        pointer-events: none;
      }
      .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }
      .hamburger {
        display: flex;
      }
      .nav-cta {
        display: none;
      }
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 1rem;
      color: var(--primary-deep);
    }

    .section-subtitle {
      color: var(--text-muted);
      max-width: 700px;
      margin-bottom: 3rem;
    }

    /* Hero */
    .hero {
      background: var(--bg-dark);
      color: white;
      padding: 0 0 80px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }

    .hero-left h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }

    .hero-left .highlight {
      color: var(--accent-cyan);
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-light);
      margin-bottom: 2rem;
      max-width: 90%;
    }

    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .hero-right {
      background: rgba(20,24,50,0.7);
      backdrop-filter: blur(12px);
      border-radius: 20px;
      padding: 1.5rem;
      border: 1px solid rgba(255,255,255,0.1);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-blend-mode: overlay;
    }

    .live-panel {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .match-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(0,0,0,0.4);
      padding: 0.8rem 1rem;
      border-radius: 10px;
      font-family: var(--font-mono);
    }

    .score {
      font-size: 1.8rem;
      font-weight: 700;
    }

    .cyan-text { color: var(--accent-cyan); }
    .pink-text { color: var(--accent-pink); }

    @keyframes blink {
      0% { opacity: 1; }
      50% { opacity: 0.3; }
      100% { opacity: 1; }
    }

    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-pink);
      border-radius: 50%;
      display: inline-block;
      animation: blink 1s infinite;
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-left h1 {
        font-size: 2rem;
      }
      .hero-right {
        margin-top: 2rem;
      }
    }

    /* 数据网格 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-top: -60px;
      position: relative;
      z-index: 5;
    }

    .stat-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-gold);
      font-family: var(--font-mono);
    }

    .stat-label {
      color: var(--text-muted);
      margin-top: 0.5rem;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
        margin-top: -40px;
      }
    }

    /* 核心优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }

    .feature-item {
      background: white;
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
    }

    .feature-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      margin-bottom: 1.2rem;
    }

    @media (max-width: 768px) {
      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 流程 */
    .steps {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
    }

    .step {
      text-align: center;
      flex: 1;
      position: relative;
    }

    .step-circle {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--border-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.2rem;
      margin: 0 auto 1rem;
      transition: var(--transition);
    }

    .step:hover .step-circle {
      background: var(--accent-cyan);
      color: var(--primary-deep);
    }

    @media (max-width: 768px) {
      .steps {
        flex-direction: column;
        gap: 2rem;
      }
    }

    /* 案例瀑布 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.5rem;
    }

    .case-card {
      position: relative;
      border-radius: 4px;
      overflow: hidden;
      background: var(--primary-deep);
    }

    .case-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      opacity: 0.8;
    }

    .case-info {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(0,0,0,0.75);
      color: white;
      padding: 1rem;
    }

    @media (max-width: 768px) {
      .case-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 对比表 */
    .table-wrap {
      overflow-x: auto;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      background: white;
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    th {
      background: var(--primary-deep);
      color: white;
      padding: 1rem;
      font-weight: 600;
    }

    td, th {
      padding: 0.9rem;
      text-align: center;
      border-bottom: 1px solid var(--border-light);
    }

    .highlight-col {
      border: 2px solid var(--accent-cyan);
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      padding: 1.2rem 1.5rem;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      color: var(--text-muted);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 1rem;
    }

    /* CTA */
    .cta-section {
      background: var(--bg-dark);
      color: white;
    }

    .cta-form input, .cta-form textarea {
      width: 100%;
      padding: 0.8rem;
      margin-bottom: 1rem;
      border-radius: var(--radius-sm);
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
    }

    .footer {
      background: var(--bg-dark);
      color: var(--text-light);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }