/* roulang page: index */
:root {
      --primary-deep-blue: #0A1F3F;
      --accent-orange: #F15A24;
      --bg-warm-white: #FAF9F7;
      --card-white: #FFFFFF;
      --text-dark: #1E1E1E;
      --text-secondary: #5A5A5A;
      --border-light: #E8E6E1;
      --shadow-sm: 0 4px 20px rgba(10,31,63,0.06);
      --shadow-hover: 0 8px 30px rgba(10,31,63,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm-white);
      color: var(--text-dark);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      padding-bottom: 70px;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      color: var(--primary-deep-blue);
      margin-bottom: 1rem;
    }
    h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    h2 {
      font-size: 36px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 2.5rem;
    }
    h3 {
      font-size: 22px;
      font-weight: 600;
    }
    p {
      margin-bottom: 1.5rem;
      color: var(--text-secondary);
    }
    a {
      color: var(--accent-orange);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: #D9441A;
      text-decoration: underline;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    section {
      padding: 100px 0;
    }
    @media (max-width: 1024px) {
      section {
        padding: 60px 0;
      }
      h1 {
        font-size: 36px;
      }
      h2 {
        font-size: 28px;
      }
    }
    .btn {
      display: inline-block;
      font-weight: 600;
      border-radius: var(--radius-btn);
      text-align: center;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      border: none;
      font-size: 16px;
      padding: 14px 32px;
    }
    .btn-primary {
      background-color: var(--accent-orange);
      color: white;
      box-shadow: 0 4px 10px rgba(241,90,36,0.25);
    }
    .btn-primary:hover {
      background-color: #D9441A;
      transform: scale(1.03);
      color: white;
      text-decoration: none;
      box-shadow: 0 6px 14px rgba(241,90,36,0.35);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-deep-blue);
      color: var(--primary-deep-blue);
    }
    .btn-outline:hover {
      background: var(--primary-deep-blue);
      color: white;
      text-decoration: none;
    }
    .btn-white {
      background: white;
      color: var(--primary-deep-blue);
      font-weight: 700;
    }
    .btn-white:hover {
      background: #f0f0f0;
      transform: scale(1.03);
      color: var(--primary-deep-blue);
    }
    @media (max-width: 640px) {
      .btn {
        width: 100%;
        display: block;
        padding: 16px 20px;
      }
    }
    header.desktop-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(250,249,247,0.95);
      backdrop-filter: blur(8px);
      z-index: 100;
      border-bottom: 1px solid var(--border-light);
      padding: 15px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-family: var(--font-heading);
      font-weight: 700;
      font-size: 24px;
      color: var(--primary-deep-blue);
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .logo .dot {
      width: 8px;
      height: 8px;
      background: var(--accent-orange);
      border-radius: 50%;
      display: inline-block;
      margin-right: 4px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      color: var(--text-dark);
      font-weight: 500;
      position: relative;
      text-decoration: none;
      font-size: 16px;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-orange);
      transition: width 0.2s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      margin-left: 16px;
    }
    @media (max-width: 1024px) {
      .desktop-nav {
        display: none;
      }
    }
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: white;
      border-top: 1px solid var(--border-light);
      z-index: 110;
      justify-content: space-around;
      padding: 10px 0 8px;
      box-shadow: 0 -2px 10px rgba(0,0,0,0.04);
    }
    .mobile-bottom-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 12px;
      gap: 4px;
      transition: var(--transition);
    }
    .mobile-bottom-nav a i {
      font-size: 20px;
    }
    .mobile-bottom-nav a.active {
      color: var(--accent-orange);
    }
    @media (max-width: 1024px) {
      .mobile-bottom-nav {
        display: flex;
      }
      body {
        padding-bottom: 80px;
      }
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      min-height: 90vh;
    }
    .hero-text {
      padding-right: 20px;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 2rem;
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      min-height: 450px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .hero-image::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 30%, rgba(10,31,63,0.1) 0%, transparent 60%);
    }
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        min-height: auto;
        padding-top: 80px;
      }
      .hero-text {
        padding-right: 0;
      }
      .hero-image {
        min-height: 300px;
        order: -1;
      }
    }
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border-top: 3px solid transparent;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-top-color: var(--accent-orange);
    }
    .card-icon {
      font-size: 32px;
      color: var(--accent-orange);
      margin-bottom: 20px;
    }
    .card h3 {
      margin-bottom: 12px;
    }
    @media (max-width: 1024px) {
      .cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .cards-grid {
        grid-template-columns: 1fr;
      }
    }
    .results-bar {
      background: var(--primary-deep-blue);
      padding: 60px 0;
      text-align: center;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-orange);
      line-height: 1.2;
    }
    .stat-label {
      color: white;
      font-size: 16px;
      margin-top: 8px;
    }
    @media (max-width: 640px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      gap: 20px;
      align-items: flex-start;
      border-left: 4px solid var(--accent-orange);
    }
    .testimonial-avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #ddd;
      flex-shrink: 0;
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
    }
    .testimonial-content h3 {
      margin-bottom: 4px;
    }
    .partner-logos {
      margin-top: 3rem;
      display: flex;
      justify-content: center;
      gap: 40px;
      flex-wrap: wrap;
      filter: grayscale(1);
      opacity: 0.7;
    }
    .partner-logos img {
      height: 35px;
    }
    .accordion {
      max-width: 800px;
      margin: 0 auto;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
    }
    .accordion-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 20px;
      color: var(--primary-deep-blue);
    }
    .accordion-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }
    .accordion-item.open .accordion-answer {
      max-height: 300px;
      margin-top: 12px;
    }
    .accordion-icon {
      font-size: 24px;
      color: var(--accent-orange);
      transition: transform 0.2s;
    }
    .cta-section {
      background: var(--accent-orange);
      text-align: center;
      padding: 80px 0;
    }
    .cta-section h2 {
      color: white;
    }
    .footer {
      background: var(--primary-deep-blue);
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: #ccc;
    }
    .footer a:hover {
      color: var(--accent-orange);
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }