/* roulang page: index */
:root {
      --primary: #1A5C3A;
      --primary-dark: #144A2E;
      --accent: #E8A817;
      --bg: #FAFBF7;
      --bg-dark: #0F2F1D;
      --bg-card: #FFFFFF;
      --text: #1E2A23;
      --text-secondary: #5A6B5F;
      --text-light: #BCC9C0;
      --white: #ffffff;
      --border-light: #e8e8e8;
      --radius-card: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 2px 12px rgba(15, 47, 29, 0.06);
      --shadow-hover: 0 8px 30px rgba(15, 47, 29, 0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
      --font-mono: "Inter", "SF Pro Display", system-ui, sans-serif;
      --transition-base: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    /* 导航 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: transparent;
      transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }
    .main-header.scrolled {
      background: var(--white);
      box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .main-header.scrolled .logo {
      color: var(--primary);
    }
    .logo i {
      font-size: 28px;
      color: var(--accent);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      font-weight: 500;
      color: var(--white);
      opacity: 0.9;
      padding: 8px 0;
      border-bottom: 3px solid transparent;
      transition: var(--transition-base);
    }
    .main-header.scrolled .nav-link {
      color: var(--text);
    }
    .nav-link:hover, .nav-link.active {
      opacity: 1;
      border-bottom-color: var(--accent);
    }
    .nav-cta {
      background: var(--accent);
      color: #0F2F1D !important;
      padding: 10px 24px;
      border-radius: 30px;
      font-weight: 600;
      transition: var(--transition-base);
      border: none;
    }
    .nav-cta:hover {
      background: #d4950f;
      transform: translateY(-2px);
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--white);
      background: none;
      border: none;
    }
    .main-header.scrolled .hamburger {
      color: var(--primary);
    }

    @media (max-width: 1024px) {
      .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-link {
        color: var(--text) !important;
        width: 100%;
        padding: 12px 0;
        border-bottom: 1px solid var(--border-light);
      }
      .nav-cta {
        width: 100%;
        text-align: center;
        margin-top: 12px;
      }
      .hamburger {
        display: block;
      }
    }

    /* Hero */
    .hero {
      min-height: 85vh;
      background: linear-gradient(135deg, #0F2F1D 0%, #1A5C3A 100%);
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
    }
    .hero::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.25;
      mix-blend-mode: overlay;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      width: 100%;
    }
    .hero-text {
      flex: 1;
      color: var(--white);
    }
    .hero h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero .subtitle {
      font-size: 18px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(90deg, #1A5C3A, #2D8A56);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      border: none;
      display: inline-block;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--white);
      color: var(--white);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition-base);
    }
    .btn-outline:hover {
      background: var(--white);
      color: var(--primary-dark);
    }
    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .shield-icon {
      font-size: 160px;
      color: rgba(232, 168, 23, 0.5);
      filter: drop-shadow(0 0 20px rgba(0,0,0,0.3));
    }
    @media (max-width: 768px) {
      .hero {
        min-height: 70vh;
        text-align: center;
      }
      .hero-content {
        flex-direction: column;
      }
      .hero h1 {
        font-size: 36px;
      }
      .hero-visual {
        display: none;
      }
      .hero-buttons {
        justify-content: center;
      }
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 16px;
      color: var(--text);
    }
    .section-sub {
      text-align: center;
      color: var(--text-secondary);
      margin-bottom: 48px;
      font-size: 18px;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      padding: 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      text-align: left;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      font-size: 36px;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .service-card p {
      color: var(--text-secondary);
      margin-bottom: 20px;
    }
    .text-link {
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .text-link i {
      transition: transform 0.2s;
    }
    .text-link:hover i {
      transform: translateX(4px);
    }

    /* 优势数据 */
    .stats-band {
      background: linear-gradient(180deg, #0F2F1D, #1A4630);
      color: white;
    }
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
    }
    .stat-item {
      padding: 20px;
    }
    .stat-number {
      font-size: 44px;
      font-weight: 700;
      font-family: var(--font-mono);
      color: var(--accent);
    }
    .stat-label {
      font-size: 16px;
      color: rgba(255,255,255,0.8);
    }

    /* 案例网格 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    .case-info {
      padding: 20px;
    }
    .case-tag {
      color: var(--accent);
      font-weight: 600;
      font-size: 14px;
    }

    /* 流程 */
    .steps-row {
      display: flex;
      justify-content: space-between;
      gap: 24px;
      margin-top: 40px;
    }
    .step {
      flex: 1;
      text-align: center;
    }
    .step-num {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-weight: 700;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 40px;
      align-items: start;
    }
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .accordion-header {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      cursor: pointer;
    }
    .accordion-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
    }
    .accordion-body.open {
      max-height: 200px;
      margin-top: 12px;
    }

    /* CTA */
    .cta-band {
      background: linear-gradient(90deg, #1A5C3A, #2D8A56);
      text-align: center;
      color: white;
    }

    /* 页脚 */
    .footer {
      background: #0F2F1D;
      color: var(--text-light);
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .copyright {
      text-align: center;
      margin-top: 40px;
      border-top: 1px solid #2a4535;
      padding-top: 20px;
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .services-grid, .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .services-grid, .case-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .steps-row {
        flex-direction: column;
      }
      .stats-grid {
        gap: 20px;
      }
    }