/* roulang page: index */
:root {
      --primary: #2D5A27;
      --primary-deep: #1E3A1F;
      --accent: #F4A261;
      --accent-hover: #E07B39;
      --bg-global: #FAFAF7;
      --bg-card: #FFFFFF;
      --bg-deep: #1E3A1F;
      --bg-light-gray: #F0EDE6;
      --text-heading: #1C281B;
      --text-body: #3A4A38;
      --text-light: #F5F7F4;
      --text-muted: #6B7A68;
      --text-footer: #A0B09D;
      --border-light: #D9D6CF;
      --border-deep: #3A5A38;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 6px 16px rgba(0,0,0,0.06);
      --radius-card: 12px;
      --radius-lg: 16px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      --font-data: "Inter", "DIN Alternate", "Noto Sans SC", sans-serif;
      --nav-height: 72px;
      --max-width: 1200px;
      --transition: all 0.3s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-global);
      color: var(--text-body);
      line-height: 1.8;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    button, input, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      background: transparent;
      transition: background 0.4s ease, backdrop-filter 0.4s ease, color 0.3s ease;
      color: white;
    }

    .nav.scrolled {
      background: rgba(250,250,247,0.92);
      backdrop-filter: blur(12px);
      color: var(--text-heading);
      box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    }

    .nav-logo {
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: 0.5px;
      display: flex;
      align-items: baseline;
      gap: 12px;
      color: inherit;
    }
    .nav-logo small {
      font-size: 0.9rem;
      font-weight: 400;
      opacity: 0.8;
      letter-spacing: 1px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      position: relative;
      padding: 8px 0;
      color: inherit;
      opacity: 0.9;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--accent);
      transition: width 0.25s ease;
      border-radius: 3px;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .nav-separator {
      width: 1px;
      height: 18px;
      background: var(--border-light);
      opacity: 0.5;
    }
    .nav.scrolled .nav-separator {
      background: var(--border-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: inherit;
      font-size: 1.8rem;
      cursor: pointer;
      line-height: 1;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #1E3A1F 0%, #2D5A27 100%);
      color: white;
      min-height: 100vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding-top: var(--nav-height);
    }
    .hero-bg-pattern {
      position: absolute;
      inset: 0;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" opacity="0.08"><path d="M100 20 C60 20 20 60 20 100 C20 140 60 180 100 180 C140 180 180 140 180 100 C180 60 140 20 100 20Z" fill="none" stroke="white" stroke-width="0.5"/><circle cx="100" cy="100" r="3" fill="white"/><circle cx="60" cy="60" r="2" fill="white"/><circle cx="140" cy="70" r="2.5" fill="white"/><circle cx="70" cy="140" r="2" fill="white"/><circle cx="130" cy="130" r="2" fill="white"/></svg>');
      background-size: 200px;
      pointer-events: none;
    }
    .hero .container {
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
      z-index: 2;
    }
    .hero-content {
      flex: 6;
    }
    .hero-visual {
      flex: 4;
      display: flex;
      justify-content: center;
      align-items: center;
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-actions {
      display: flex;
      gap: 18px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.25s;
      cursor: pointer;
      border: none;
      line-height: 1.2;
    }
    .btn-primary {
      background: var(--accent);
      color: #1E2A1C;
      box-shadow: 0 4px 12px rgba(244,162,97,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 18px rgba(224,123,57,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.1);
      border-color: var(--accent);
      color: var(--accent);
    }
    .hero-micro-stats {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    .micro-stat {
      display: flex;
      align-items: baseline;
      gap: 6px;
      font-size: 0.95rem;
      opacity: 0.85;
    }
    .micro-stat strong {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--accent);
    }
    .hero-visual img {
      max-width: 320px;
      filter: drop-shadow(0 12px 24px rgba(0,0,0,0.3));
      opacity: 0.9;
    }

    /* 通用区块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-sub {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 48px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .section-sub::before {
      content: 'MILAN';
      font-size: 0.7rem;
      letter-spacing: 3px;
      background: var(--bg-light-gray);
      padding: 4px 10px;
      border-radius: 20px;
      color: var(--primary);
      font-weight: 600;
    }

    /* 指标看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--bg-card);
      padding: 32px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-number {
      font-family: var(--font-data);
      font-size: 56px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
      transition: transform 0.2s;
    }
    .stat-card:hover .stat-number {
      transform: scale(1.05);
    }
    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-top: 8px;
    }
    .stat-trend {
      margin-top: 10px;
      font-size: 0.9rem;
      color: var(--accent);
      font-weight: 600;
    }

    /* 服务矩阵 错位布局 */
    .services-layout {
      display: flex;
      gap: 28px;
      align-items: stretch;
    }
    .service-main {
      flex: 0 0 50%;
      background: linear-gradient(145deg, #f4f9f2, #ffffff);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .service-side {
      flex: 0 0 50%;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .service-card:hover {
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      font-size: 2rem;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-link {
      margin-top: 16px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 600;
      font-size: 0.95rem;
    }
    .service-link span {
      transition: transform 0.2s;
    }
    .service-link:hover span {
      transform: translateX(4px);
    }

    /* 对比区 */
    .comparison-bg {
      background: var(--bg-light-gray);
    }
    .comparison-table {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .compare-col {
      flex: 1;
      background: white;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .compare-col.highlight {
      border: 2px solid var(--primary);
      background: #f9fdf7;
    }
    .compare-title {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 24px;
      color: var(--text-heading);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .highlight-value {
      color: var(--primary);
      font-weight: 700;
    }
    .accent-badge {
      background: var(--accent);
      color: #1E2A1C;
      padding: 2px 10px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-left: 8px;
    }

    /* FAQ */
    .faq-group {
      margin-bottom: 32px;
    }
    .faq-group-title {
      font-weight: 600;
      font-size: 1.2rem;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .accordion-item {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      overflow: hidden;
    }
    .accordion-btn {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: transparent;
      border: none;
      font-weight: 600;
      font-size: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--text-heading);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fdfdfb;
      padding: 0 24px;
      border-left: 3px solid transparent;
    }
    .accordion-item.open .accordion-content {
      max-height: 200px;
      padding: 16px 24px;
      border-left-color: var(--accent);
    }

    /* 表单 */
    .contact-section {
      background: var(--bg-deep);
      color: white;
    }
    .contact-form {
      max-width: 560px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .input-field {
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(255,255,255,0.2);
      border-radius: var(--radius-input);
      padding: 14px 18px;
      color: white;
      outline: none;
      transition: border 0.2s;
    }
    .input-field::placeholder {
      color: #b0c7aa;
    }
    .input-field:focus {
      border-color: var(--accent);
    }
    .trust-note {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      opacity: 0.8;
    }

    /* Footer */
    .footer {
      background: var(--bg-deep);
      color: var(--text-footer);
      padding: 32px 0;
      border-top: 1px solid var(--border-deep);
    }
    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }
    .footer-links a {
      margin-left: 24px;
      color: var(--text-footer);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero .container { flex-direction: column; text-align: center; }
      .hero-visual { order: -1; margin-bottom: 30px; }
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .services-layout { flex-direction: column; }
      .service-main, .service-side { flex: auto; width: 100%; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      .nav.mobile-open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: rgba(30,58,31,0.96);
        padding: 32px;
        gap: 24px;
        backdrop-filter: blur(24px);
      }
      .comparison-table { flex-direction: column; }
      section { padding: 60px 0; }
      .hero h1 { font-size: 36px; }
      .stat-number { font-size: 40px; }
    }
    @media (max-width: 520px) {
      .dashboard-grid { grid-template-columns: 1fr; }
      .hero-actions { flex-direction: column; align-items: center; }
    }