/* roulang page: index */
:root {
      --primary: #0A1F3F;
      --secondary: #00C9A7;
      --accent: #FF6B35;
      --bg: #F4F6F9;
      --card-bg: #FFFFFF;
      --dark-bg: #0A1F3F;
      --text-primary: #1A1A2E;
      --text-secondary: #5A6070;
      --border: #E2E6ED;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --shadow-card: 0 2px 16px rgba(10,31,63,0.06);
      --shadow-hover: 0 8px 32px rgba(10,31,63,0.12);
      --bs-primary: #0A1F3F;
      --bs-success: #00C9A7;
      --bs-warning: #FF6B35;
      --bs-body-color: #1A1A2E;
      --bs-body-bg: #F4F6F9;
      --bs-border-radius: 0.75rem;
      --bs-border-radius-lg: 1rem;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--bg);
      color: var(--text-primary);
      margin: 0;
      line-height: 1.75;
      font-size: 16px;
      overflow-x: hidden;
      padding-top: 72px;
    }
    h1, h2, h3, h4 {
      font-weight: 700;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    /* 导航 */
    .navbar {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(12px);
      height: 72px;
      border-bottom: 1px solid var(--border);
      padding: 0 1.5rem;
    }
    .navbar-brand {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand img {
      height: 40px;
    }
    .nav-link {
      color: var(--text-secondary) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: color 0.2s;
      padding: 0.5rem 0.75rem;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--secondary);
      transition: width 0.2s;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 60%;
    }
    .mega-trigger {
      background: transparent;
      border: 1px solid var(--border);
      padding: 0.5rem 1.2rem;
      border-radius: 30px;
      color: var(--text-primary);
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 4px;
      cursor: pointer;
    }
    .mega-panel {
      position: absolute;
      right: 0;
      top: 60px;
      width: 320px;
      background: white;
      border-radius: 12px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.15);
      padding: 1.2rem;
      opacity: 0;
      visibility: hidden;
      transform: translateY(8px);
      transition: 0.2s;
      z-index: 1000;
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 12px;
    }
    .mega-trigger:hover + .mega-panel, .mega-panel:hover {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .mega-item {
      text-align: center;
      color: var(--text-primary);
      font-size: 13px;
    }
    .mega-item i {
      font-size: 1.6rem;
      color: var(--secondary);
      margin-bottom: 4px;
    }
    @media (max-width: 768px) {
      .navbar-nav {
        background: white;
        padding: 1rem;
      }
      .mega-panel {
        display: none;
      }
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(135deg, rgba(10,31,63,0.65) 0%, rgba(0,201,167,0.25) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      position: relative;
    }
    .hero-content {
      max-width: 600px;
    }
    .hero h1 {
      font-size: 52px;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: white;
      font-weight: 700;
      margin-bottom: 1.2rem;
    }
    .hero .lead {
      font-size: 20px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2rem;
    }
    .float-cta {
      position: fixed;
      right: 2rem;
      bottom: 2rem;
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      border-radius: 40px;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(255,107,53,0.4);
      z-index: 99;
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }
    .glass-card {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: 16px;
      padding: 1.5rem;
      color: white;
      width: 280px;
    }
    .glass-card .metric {
      font-size: 32px;
      font-weight: 800;
      color: var(--secondary);
    }
    @media (max-width: 768px) {
      .hero h1 { font-size: 36px; }
      .glass-card { width: 100%; margin-top: 2rem; }
    }
    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 38px;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--primary);
    }
    .metric-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      text-align: center;
      box-shadow: var(--shadow-card);
    }
    .metric-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--secondary);
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(0,201,167,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      color: var(--secondary);
      font-size: 2rem;
    }
    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      height: 100%;
    }
    .compare-list i {
      margin-right: 8px;
    }
    .accordion-button {
      font-weight: 600;
      background: white;
      border: 1px solid var(--border);
    }
    .accordion-button:not(.collapsed) {
      background: #E6FAF7;
      border-color: var(--secondary);
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-item {
      border: none;
      margin-bottom: 8px;
    }
    .dark-form {
      background: var(--dark-bg);
    }
    .dark-form input, .dark-form textarea {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.2);
      color: white;
      border-radius: 6px;
    }
    .dark-form input:focus {
      border-color: var(--secondary);
      box-shadow: 0 0 0 0.2rem rgba(0,201,167,0.25);
    }
    .btn-primary-custom {
      background: var(--secondary);
      border: none;
      color: white;
      padding: 14px 36px;
      border-radius: 8px;
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-primary-custom:hover {
      background: #00B392;
      box-shadow: 0 4px 20px rgba(0,201,167,0.35);
    }
    .btn-outline-custom {
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 8px 24px;
      border-radius: 8px;
      font-weight: 600;
      background: transparent;
    }
    .btn-outline-custom:hover {
      background: var(--primary);
      color: white;
    }
    footer {
      background: #0D1B2A;
      color: rgba(255,255,255,0.7);
    }
    footer a {
      color: rgba(255,255,255,0.7);
    }
    footer a:hover {
      color: var(--secondary);
    }
    @media (max-width: 768px) {
      .section-title { font-size: 28px; }
      .service-card { padding: 24px; }
    }