/* roulang page: index */
/* 设计变量与全局重置 */
    :root {
      --primary: #E63917;
      --primary-dark: #c53014;
      --secondary: #1B1B2F;
      --accent: #00D084;
      --accent-light: #00e690;
      --bg-light: #F8F9FA;
      --white: #FFFFFF;
      --text-main: #212529;
      --text-muted: #6C757D;
      --border: #DEE2E6;
      --gray-bg: #F1F3F5;
      --shadow-card: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.10);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-mono: 'Fira Code', 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, input {
      font-family: inherit;
      outline: none;
    }

    /* 容器 */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background-color: rgba(27, 27, 47, 0.95);
      backdrop-filter: blur(10px);
      z-index: 1000;
      border-bottom: 1px solid transparent;
      transition: border-color 0.25s ease, background-color 0.25s ease;
      height: 72px;
      display: flex;
      align-items: center;
    }
    .navbar.scrolled {
      border-bottom: 1px solid var(--primary);
      background-color: rgba(27, 27, 47, 0.98);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 2px;
    }
    .logo .accent-dot {
      color: var(--accent);
      font-family: var(--font-mono);
      font-weight: 400;
      margin: 0 2px;
      font-size: 2rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-link {
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
      padding-bottom: 2px;
    }
    .nav-link:hover,
    .nav-link.active {
      color: #fff;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.2s ease;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .btn-primary-nav {
      background: var(--primary);
      color: #fff;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: background 0.2s;
      font-size: 0.95rem;
      white-space: nowrap;
    }
    .btn-primary-nav:hover {
      background: var(--primary-dark);
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: #fff;
      background: none;
      border: none;
      cursor: pointer;
    }
    .mobile-menu {
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(27,27,47,0.98);
      backdrop-filter: blur(10px);
      flex-direction: column;
      padding: 2rem;
      display: none;
      gap: 1.5rem;
      z-index: 999;
    }
    .mobile-menu.open {
      display: flex;
    }
    .mobile-menu .nav-link {
      font-size: 1.2rem;
    }

    /* 板块间距 */
    section {
      padding: 80px 0;
    }

    /* Hero */
    .hero {
      padding-top: 140px;
      padding-bottom: 80px;
      background: radial-gradient(circle at 20% 30%, rgba(230,57,23,0.06) 0%, transparent 60%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2.5rem;
      align-items: center;
    }
    .hero-title {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--secondary);
      margin-bottom: 1.5rem;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
    }
    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }
    .btn-main {
      background: var(--primary);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: background 0.2s ease;
      font-size: 1rem;
    }
    .btn-main:hover { background: var(--primary-dark); }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      cursor: pointer;
      transition: all 0.2s;
    }
    .btn-outline:hover { background: rgba(230,57,23,0.08); }
    .hero-panel {
      background: var(--secondary);
      border-radius: 20px;
      padding: 28px;
      color: #fff;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-blend-mode: overlay;
      position: relative;
      box-shadow: 0 20px 35px rgba(0,0,0,0.15);
    }
    .match-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 14px 0;
      border-bottom: 1px solid rgba(255,255,255,0.15);
    }
    .live-badge {
      color: var(--accent);
      font-weight: 600;
      font-size: 0.8rem;
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.3s infinite;
    }
    @keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.4; } 100% { opacity: 1; } }

    /* 指标看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--white);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      text-align: center;
      transition: all 0.25s ease;
    }
    .stat-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }

    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }
    .service-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--primary);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .service-card:hover {
      border-left-color: var(--accent);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .service-img {
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
    }

    /* 对比区 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 24px;
      align-items: center;
    }
    .vs-badge {
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      font-size: 1.5rem;
      padding: 16px 20px;
      border-radius: 50%;
      width: 70px;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto;
      box-shadow: 0 5px 15px rgba(230,57,23,0.3);
    }
    .compare-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
    }
    .compare-card.dim {
      background: #f1f3f5;
      color: #6c757d;
    }

    /* FAQ */
    .faq-item {
      background: #fff;
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
    }
    .faq-answer {
      padding: 0 24px 20px;
      display: none;
      color: #4b4f54;
    }
    .faq-item.open .faq-answer { display: block; }

    /* CTA 表单 */
    .cta-section {
      background: var(--secondary);
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-blend-mode: overlay;
      color: #fff;
    }
    .cta-form {
      display: flex;
      gap: 1rem;
      max-width: 500px;
      margin-top: 24px;
      flex-wrap: wrap;
    }
    .cta-input {
      flex:1;
      padding: 14px 20px;
      border-radius: var(--radius-btn);
      border: none;
      font-size: 1rem;
    }
    .btn-accent {
      background: var(--accent);
      color: var(--secondary);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-accent:hover { background: #00e690; }

    /* 页脚 */
    .footer {
      background: var(--secondary);
      color: rgba(255,255,255,0.6);
      padding: 28px 0;
      font-size: 0.9rem;
    }
    .footer-content {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 38px; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: repeat(2,1fr); }
      .comparison-wrapper { grid-template-columns: 1fr; }
      .vs-badge { margin: 10px auto; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: block; }
      .stat-number { font-size: 28px; }
      .services-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 32px; }
    }