/* roulang page: index */
:root {
      --primary-deep: #0A2E1F;
      --accent-gold: #F5A623;
      --accent-gold-hover: #E09510;
      --bg-warm: #FAFAF7;
      --text-dark: #1E1E1E;
      --text-muted: #5A685A;
      --white: #FFFFFF;
      --border-light: #D0D8D0;
      --placeholder: #9AA89A;
      --shadow-card: 0 4px 20px rgba(10,46,31,0.06);
      --shadow-hover: 0 8px 28px rgba(10,46,31,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

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

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.6;
      font-size: 16px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

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

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

    button, input, textarea {
      font-family: inherit;
      outline: none;
    }

    /* 导航栏：沉浸式深松绿 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 46, 31, 0.92);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(245, 166, 35, 0.2);
      transition: box-shadow 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 1px;
      display: flex;
      align-items: center;
    }
    .logo span {
      color: var(--accent-gold);
      font-weight: 800;
      margin-right: 4px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 1rem;
      transition: color 0.2s, border-bottom 0.2s;
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-gold);
      border-bottom-color: var(--accent-gold);
    }
    .nav-cta {
      background: var(--accent-gold);
      color: var(--primary-deep) !important;
      padding: 10px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none !important;
      transition: background 0.2s, transform 0.2s;
    }
    .nav-cta:hover {
      background: var(--accent-gold-hover);
      transform: translateY(-1px);
    }

    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
    }

    /* Sections 通用 */
    section {
      padding: 90px 0;
    }

    h1 {
      font-size: clamp(2.4rem, 5vw, 3rem);
      font-weight: 700;
      line-height: 1.3;
    }
    h2 {
      font-size: clamp(1.8rem, 4vw, 2.2rem);
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--primary-deep);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(10,46,31,0.95) 0%, rgba(7,30,20,0.98) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      padding-top: 80px;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 50px;
    }
    .hero-content {
      flex: 1;
    }
    .hero-content h1 {
      color: white;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
      line-height: 1.7;
      max-width: 550px;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-size: 1.1rem;
      display: inline-block;
      border: none;
      cursor: pointer;
      transition: background 0.2s, box-shadow 0.2s;
    }
    .btn-primary:hover {
      background: var(--accent-gold-hover);
      box-shadow: 0 6px 20px rgba(245,166,35,0.3);
    }
    .hero-image {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .hero-image img {
      max-width: 100%;
      border-radius: var(--radius-card);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    }

    /* 解决方案卡片 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 45px;
    }
    .solution-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.3s, border 0.2s;
      border: 1px solid transparent;
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-gold);
    }
    .card-icon {
      width: 60px;
      margin-bottom: 24px;
      border-radius: 10px;
      background: rgba(245,166,35,0.1);
      padding: 8px;
    }
    .solution-card h3 {
      margin-bottom: 10px;
    }
    .solution-card p {
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .arrow-link {
      margin-top: auto;
      color: var(--accent-gold);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 成果展示 */
    .results-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      justify-content: space-around;
      margin-top: 40px;
    }
    .stat-item {
      text-align: center;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 800;
      color: var(--accent-gold);
    }
    .results-bg {
      background: rgba(10,46,31,0.02);
    }

    /* 证言轮播区 */
    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-gold);
      display: flex;
      gap: 24px;
      align-items: center;
      max-width: 800px;
      margin: 0 auto;
    }
    .avatar {
      width: 70px;
      height: 70px;
      border-radius: 50%;
      object-fit: cover;
      background: #ddd;
    }

    /* FAQ 手风琴 */
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      overflow: hidden;
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
    }
    .faq-question {
      display: flex;
      align-items: center;
      padding: 20px;
      font-weight: 600;
      cursor: pointer;
      background: white;
      transition: background 0.2s;
    }
    .faq-question span {
      color: var(--accent-gold);
      font-size: 1.5rem;
      margin-right: 16px;
      font-weight: 700;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s, padding 0.3s;
      background: #f7faf5;
      padding: 0 20px;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
      padding: 20px;
      border-left: 3px solid var(--accent-gold);
    }

    /* CTA */
    .cta-section {
      background: var(--primary-deep);
      color: white;
      text-align: center;
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 12px 30px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      margin-left: 16px;
    }

    /* 表单 */
    .contact-form input {
      width: 100%;
      padding: 14px;
      border: 1px solid var(--border-light);
      border-radius: 6px;
      margin-bottom: 16px;
    }
    .contact-form input:focus {
      border-color: var(--accent-gold);
    }

    footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.8);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 40px;
    }

    @media (max-width: 768px) {
      .main-header {
        display: none;
      }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 16px;
        left: 10px;
        right: 10px;
        z-index: 999;
        background: rgba(10,46,31,0.96);
        backdrop-filter: blur(20px);
        border-radius: 40px;
        padding: 6px 16px;
        justify-content: space-around;
        box-shadow: 0 8px 24px rgba(0,0,0,0.3);
      }
      .mobile-nav a {
        color: #ccc;
        font-size: 0.75rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        font-weight: 500;
        padding: 6px 0;
      }
      .mobile-nav a.active {
        color: var(--accent-gold);
      }
      .hero-grid, .solutions-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-image {
        order: -1;
      }
      .cta-section .btn-secondary {
        margin-left: 0;
        margin-top: 12px;
      }
    }