/* roulang page: index */
:root {
      --primary: #0A8F3C;
      --primary-hover: #067A2E;
      --secondary: #F15A24;
      --secondary-hover: #D94A1A;
      --dark: #1E1E1E;
      --gray-bg: #F7F8FA;
      --white: #FFFFFF;
      --accent-yellow: #FFC107;
      --success: #28A745;
      --error: #DC3545;
      --text-main: #1E1E1E;
      --text-soft: #5A5A5A;
      --border-light: #E0E0E0;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
      --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-en: "Inter", "Roboto", sans-serif;
    }
    * { box-sizing: border-box; }
    body {
      font-family: var(--font-cn);
      color: var(--text-main);
      background: var(--gray-bg);
      margin: 0;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 { font-family: var(--font-cn); }
    .font-en { font-family: var(--font-en); }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; height: auto; display: block; }

    /* Foundation overrides & custom container */
    .grid-container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-padding {
      padding-top: 80px;
      padding-bottom: 80px;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }
    
    /* navigation desktop */
    .navbar-custom {
      background: var(--dark);
      height: 64px;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    }
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: white;
      letter-spacing: 0.5px;
    }
    .logo-text i { color: var(--primary); margin-right: 6px; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      font-size: 15px;
      position: relative;
      padding-bottom: 4px;
      transition: 0.2s;
    }
    .nav-links a:hover, .nav-links a.active {
      color: white;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--secondary);
      transition: 0.2s;
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    .btn-nav-cta {
      background: var(--secondary);
      color: white !important;
      padding: 8px 18px;
      border-radius: 20px;
      font-weight: 600;
      margin-left: 10px;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 24px;
    }
    .mobile-menu-overlay {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      width: 100%;
      height: calc(100% - 64px);
      background: var(--dark);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 28px;
      z-index: 45;
    }
    .mobile-menu-overlay a {
      color: white;
      font-size: 20px;
      font-weight: 500;
    }
    .bottom-tab-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 56px;
      background: white;
      border-top: 1px solid var(--border-light);
      justify-content: space-around;
      align-items: center;
      z-index: 40;
    }
    .tab-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 12px;
      color: #777;
    }
    .tab-item i { font-size: 20px; margin-bottom: 2px; }
    .tab-item.active { color: var(--primary); }
    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
      .bottom-tab-bar { display: flex; }
    }

    /* hero */
    .hero-section {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      background-blend-mode: overlay;
      background-color: rgba(0,0,0,0.45);
    }
    .hero-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
    }
    .hero-left { flex: 1 1 500px; color: white; }
    .hero-left h1 {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 28px;
    }
    .btn-group { display: flex; gap: 16px; flex-wrap: wrap; }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: 0.2s;
    }
    .btn-primary:hover { background: var(--primary-hover); transform: scale(1.03); }
    .btn-outline {
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: transparent;
      transition: 0.2s;
    }
    .btn-outline:hover { background: rgba(255,255,255,0.15); }
    .hero-right {
      flex: 0 0 320px;
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(12px);
      border-radius: 16px;
      padding: 28px;
      color: white;
    }
    .stat-line {
      display: flex;
      justify-content: space-between;
      margin-bottom: 24px;
    }
    .stat-number {
      font-family: var(--font-en);
      font-size: 38px;
      font-weight: 700;
      color: var(--secondary);
    }

    /* data cards */
    .data-cards {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      justify-content: center;
      background: var(--gray-bg);
    }
    .data-item {
      background: white;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      text-align: center;
      flex: 1 1 200px;
      box-shadow: var(--shadow-card);
    }
    .data-number {
      font-family: var(--font-en);
      font-size: 48px;
      font-weight: 700;
      color: var(--secondary);
    }

    /* service cards */
    .service-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      flex: 1 1 calc(33.333% - 30px);
      transition: 0.2s;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(10,143,60,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      color: var(--primary);
      font-size: 28px;
    }
    .divider-short {
      width: 40px;
      height: 3px;
      background: #ccc;
      margin: 12px 0 16px;
    }

    /* comparison */
    .comparison-row {
      display: flex;
      gap: 24px;
    }
    .compare-col {
      flex: 1;
      padding: 32px;
      border-radius: var(--radius-card);
    }
    .compare-bad { background: #FFF5F5; }
    .compare-good { background: #F0FFF4; }
    
    /* faq */
    .accordion-title {
      font-size: 18px;
      font-weight: 600;
    }

    /* cta form */
    .cta-block {
      background: var(--primary);
      color: white;
    }
    .form-inline {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .form-inline input {
      flex: 1;
      padding: 14px;
      border-radius: var(--radius-input);
      border: none;
    }
    .btn-submit {
      background: var(--secondary);
      color: white;
      border: none;
      padding: 14px 28px;
      border-radius: var(--radius-btn);
      font-weight: bold;
    }
    
    footer {
      background: var(--dark);
      color: white;
      padding: 48px 0 24px;
    }
    @media (max-width: 768px) {
      .hero-left h1 { font-size: 32px; }
      .service-card { flex: 1 1 100%; }
      .comparison-row { flex-direction: column; }
    }