/* roulang page: index */
:root {
      --primary-orange: #FF6D00;
      --primary-gradient: linear-gradient(135deg, #FF6D00 0%, #FF9100 100%);
      --deep-teal: #004D40;
      --deep-teal-dark: #00332C;
      --surface-bg: #F8FAFB;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-pill: 9999px;
      --shadow-card: 0 10px 30px -5px rgba(0, 77, 64, 0.08);
      --shadow-hover: 0 16px 36px -6px rgba(0, 77, 64, 0.16);
      --container-max: 1240px;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--surface-bg);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .top-bar {
      background-color: var(--deep-teal-dark);
      color: #D1E7DD;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .badge-chip {
      background: rgba(255, 255, 255, 0.12);
      color: #80E5D0;
      padding: 2px 10px;
      border-radius: var(--radius-pill);
      font-size: 12px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 20px;
      color: var(--deep-teal);
    }
    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      box-shadow: 0 4px 12px rgba(255, 109, 0, 0.35);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-item a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      padding: 6px 2px;
      position: relative;
    }
    .nav-item a:hover, .nav-item a.active {
      color: var(--primary-orange);
    }
    .nav-item a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-orange);
      transition: width 0.25s ease;
    }
    .nav-item a:hover::after {
      width: 100%;
    }
    .btn-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      border: none;
    }
    .btn-pill:hover {
      transform: translateY(-2px);
    }
    .btn-primary {
      background: var(--primary-gradient);
      color: #FFFFFF;
      box-shadow: 0 6px 18px rgba(255, 109, 0, 0.35);
    }
    .btn-primary:hover {
      box-shadow: 0 8px 24px rgba(255, 109, 0, 0.45);
    }
    .btn-outline {
      background: #FFFFFF;
      color: var(--deep-teal);
      border: 1px solid #B2DFDB;
    }
    .btn-outline:hover {
      background: #E0F2F1;
    }
    .btn-dark {
      background: var(--deep-teal);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background: #00382E;
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--deep-teal);
      cursor: pointer;
    }
    section {
      padding: 70px 0;
      position: relative;
    }
    .section-dark {
      background: linear-gradient(180deg, #102A27 0%, #004D40 100%);
      color: #FFFFFF;
    }
    .section-alt {
      background-color: #F1F5F7;
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-badge {
      display: inline-block;
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 12px;
      background: rgba(255, 109, 0, 0.12);
      color: var(--primary-orange);
    }
    .section-dark .section-badge {
      background: rgba(128, 229, 208, 0.15);
      color: #80E5D0;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #B2DFDB;
    }
    .card-box {
      background: var(--card-bg);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid #EDF2F7;
      transition: all 0.3s ease;
      height: 100%;
    }
    .card-box:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .hero-banner-section {
      padding: 40px 0 60px;
      background: radial-gradient(circle at 80% 20%, rgba(255, 109, 0, 0.08), transparent 45%), linear-gradient(180deg, #FFFFFF 0%, #F4F8F8 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      color: #0B2B26;
      margin-bottom: 16px;
    }
    .hero-p {
      font-size: 16px;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }
    .coupon-wall-hero {
      background: #FFFFFF;
      border: 2px dashed #FFB74D;
      border-radius: 22px;
      padding: 22px;
      box-shadow: 0 12px 30px rgba(255, 109, 0, 0.12);
    }
    .coupon-main-card {
      background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 100%);
      border-radius: 16px;
      padding: 20px;
      border: 1px solid #FDBA74;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .coupon-value {
      font-size: 32px;
      font-weight: 900;
      color: #C2410C;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .pill-tag {
      display: inline-block;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 600;
      background: #E0F2F1;
      color: var(--deep-teal);
      margin-right: 6px;
      margin-bottom: 6px;
    }
    .product-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 18px;
      position: relative;
      height: 200px;
    }
    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .card-box:hover .product-img-wrap img {
      transform: scale(1.04);
    }
    .timeline-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .timeline-step {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 18px;
      padding: 20px;
      position: relative;
    }
    .timeline-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-orange);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 12px;
    }
    .stats-strip {
      background: linear-gradient(135deg, #004D40 0%, #00695C 100%);
      border-radius: 24px;
      padding: 32px;
      color: #FFFFFF;
      box-shadow: 0 16px 36px rgba(0, 77, 64, 0.2);
    }
    .stats-item-num {
      font-size: 36px;
      font-weight: 900;
      color: #FFB74D;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FAFCFC;
    }
    .faq-answer {
      padding: 0 22px 18px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      font-size: 14px;
      margin-bottom: 14px;
      outline: none;
      transition: border-color 0.2s ease;
      background: #FFFFFF;
    }
    .form-control:focus {
      border-color: var(--primary-orange);
    }
    .site-footer {
      background: #081B18;
      color: #B2DFDB;
      padding: 60px 0 24px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      color: #64748B;
      font-size: 13px;
      line-height: 1.8;
    }
    @media (max-width: 992px) {
      .hero-grid { grid-template-columns: 1fr; }
      .grid-3, .grid-4, .timeline-wrap { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 14px;
      }
      .nav-menu.active { display: flex; }
      .nav-toggle { display: block; }
      .grid-2, .grid-3, .grid-4, .timeline-wrap, .footer-grid { grid-template-columns: 1fr; }
      .hero-h1 { font-size: 28px; }
      .stats-strip .grid-4 { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    }