/* roulang page: index */
:root {
      --primary-green: #1B7E3D;
      --primary-green-dark: #145c2c;
      --accent-orange: #F15A24;
      --accent-orange-dark: #D94A1A;
      --bg-warm-white: #FAF9F7;
      --bg-dark-green: #0F2E1A;
      --text-main: #1A1A1A;
      --text-secondary: #5C5C5C;
      --text-light: #B0B0B0;
      --border-light: #E0E5E1;
      --card-bg: #FFFFFF;
      --card-border: #E8ECEA;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-priority: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", sans-serif;
      --transition-base: all 0.25s ease;
      --container-max: 1280px;
      --nav-height: 72px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-priority);
      background-color: var(--bg-warm-white);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeSpeed;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }

    button, .btn, input[type="submit"] {
      font-family: inherit;
      cursor: pointer;
      transition: var(--transition-base);
      border: none;
      background: none;
      font-weight: 600;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* Header / Navigation */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      height: var(--nav-height);
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid transparent;
      box-shadow: 0 1px 8px rgba(0,0,0,0.02);
      transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--nav-height);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-green);
      letter-spacing: 0.5px;
    }

    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--primary-green);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 18px;
      position: relative;
    }
    /* Simple football SVG icon representation with CSS */
    .logo-icon::before {
      content: "⚽";
      font-size: 20px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      font-weight: 500;
      font-size: 16px;
      color: var(--text-secondary);
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--primary-green);
    }

    .header-cta {
      background: var(--accent-orange);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      text-align: center;
      white-space: nowrap;
      transition: var(--transition-base);
      transform: scale(1);
    }
    .header-cta:hover {
      background: var(--accent-orange-dark);
      transform: scale(1.03);
      color: white;
    }

    .mobile-menu-btn {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      z-index: 1100;
      background: transparent;
      border: none;
    }
    .mobile-menu-btn span {
      width: 26px;
      height: 2.5px;
      background: var(--text-main);
      border-radius: 2px;
      transition: 0.3s;
    }

    /* Mobile drawer */
    .mobile-nav {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      max-width: 320px;
      height: 100vh;
      background: white;
      box-shadow: -8px 0 24px rgba(0,0,0,0.1);
      z-index: 1050;
      padding: 28px;
      transition: right 0.35s ease;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .mobile-nav.active {
      right: 0;
    }
    .mobile-nav a {
      font-size: 18px;
      font-weight: 500;
      padding: 8px 0;
      border-bottom: 1px solid var(--border-light);
    }

    /* Hero */
    #hero {
      padding: calc(var(--nav-height) + 80px) 0 80px;
      background: linear-gradient(180deg, #f4faf6 0%, var(--bg-warm-white) 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 55% 45%;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: transparent;
      background: linear-gradient(135deg, #1B7E3D 0%, #0F5E2A 100%);
      -webkit-background-clip: text;
      background-clip: text;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent-orange);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transform: scale(1);
    }
    .btn-primary:hover {
      background: var(--accent-orange-dark);
      transform: scale(1.04);
      color: white;
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
    }
    .btn-secondary:hover {
      background: var(--primary-green);
      color: white;
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      height: 420px;
      box-shadow: 0 15px 35px rgba(0,0,0,0.08);
      position: relative;
      overflow: hidden;
    }
    .hero-image::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(27,126,61,0.08) 0%, rgba(0,0,0,0) 60%);
    }

    /* Sections general */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .section-desc {
      color: var(--text-secondary);
      font-size: 17px;
      max-width: 700px;
      margin-bottom: 48px;
    }

    /* Value Grid (irregular) */
    .value-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    .value-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      flex: 1 1 250px;
    }
    .value-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .value-card h3 {
      font-size: 22px;
      margin-bottom: 12px;
      color: var(--primary-green);
    }

    /* Highlight numbers */
    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
      text-align: center;
    }
    .highlight-item .number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary-green);
      line-height: 1.2;
    }
    .highlight-item .label{
      color: var(--text-secondary);
    }

    /* Cases waterfall */
    .case-grid {
      columns: 3 280px;
      column-gap: 24px;
    }
    .case-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      overflow: hidden;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      break-inside: avoid;
    }
    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .case-img {
      width: 100%;
      aspect-ratio: 16/10;
      object-fit: cover;
      background: #dce8e0;
    }
    .case-content {
      padding: 20px;
    }
    .case-tag {
      color: var(--accent-orange);
      font-size: 13px;
      font-weight: 600;
    }

    /* Compare */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .compare-col {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid var(--border-light);
      position: relative;
    }
    .badge {
      background: var(--accent-orange);
      color: white;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
    }

    /* CTA dark */
    #cta {
      background: var(--bg-dark-green);
      color: white;
      text-align: center;
      border-radius: 28px;
      margin: 40px 24px;
      padding: 64px 20px;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
    }
    .cta-form input {
      padding: 14px;
      border-radius: var(--radius-input);
      border: none;
      width: 260px;
    }

    /* Footer */
    #footer {
      background: #2C2C2C;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer-bottom {
      border-top: 1px solid #444;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    a:hover { color: var(--primary-green); }

    @media (max-width: 1023px) {
      .nav-links, .header-cta.desktop-only { display: none; }
      .mobile-menu-btn { display: flex; }
      .hero-grid { grid-template-columns: 1fr; }
      .hero-image { height: 300px; order: -1; }
    }
    @media (max-width: 768px) {
      h1 { font-size: 34px; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }