/* roulang page: index */
:root {
      --primary: #1A3A2A;
      --primary-dark: #0D2118;
      --accent: #E85D04;
      --accent-hover: #D14D00;
      --warm-bg: #F4F0E6;
      --yellow-highlight: #FFB703;
      --text-primary: #1E1E1E;
      --text-secondary: #3A3A3A;
      --text-muted: #6B6B6B;
      --white: #FFFFFF;
      --border-light: rgba(26, 58, 42, 0.1);
      --card-shadow: 0 2px 12px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.06);
      --card-shadow-hover: 0 6px 20px rgba(0,0,0,0.08);
      --btn-shadow: 0 4px 14px rgba(232,93,4,0.3);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 50px;
      --radius-img: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      --font-number: "Inter", "Segoe UI", "Roboto", "PingFang SC", sans-serif;
      --transition: 0.2s ease;
      --transition-slow: 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }

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

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

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

    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      transition: all var(--transition);
      border: none;
      outline: none;
    }

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

    @media (max-width: 480px) {
      .container {
        padding: 0 16px;
      }
    }

    /* 导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.05);
      transition: box-shadow var(--transition);
    }

    .header.scrolled {
      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }

    .nav-links a {
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 0.25rem 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width var(--transition);
    }

    .nav-links a:hover {
      color: var(--accent);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .btn-primary {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      box-shadow: var(--btn-shadow);
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      letter-spacing: 0.3px;
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(232,93,4,0.4);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 0.65rem 1.8rem;
      border-radius: var(--radius-btn);
    }

    .btn-outline:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      justify-content: space-between;
      width: 24px;
      height: 18px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: var(--transition);
    }

    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 2rem;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 99;
      }
      .nav-links.active {
        right: 0;
      }
      .menu-toggle {
        display: flex;
        z-index: 101;
      }
      .nav {
        height: 60px;
      }
    }

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

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 0.8rem;
      letter-spacing: -0.3px;
    }

    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #F4F0E6 0%, #ffffff 100%);
      padding: 60px 0 80px;
      min-height: 80vh;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }

    .hero-content {
      flex: 1;
    }

    .hero-badge {
      display: inline-block;
      background: rgba(26,58,42,0.08);
      color: var(--primary);
      padding: 0.4rem 1.2rem;
      border-radius: 30px;
      font-weight: 500;
      font-size: 0.9rem;
      margin-bottom: 1.5rem;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 1.2rem;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 480px;
    }

    .hero-actions {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .hero-image {
      flex: 1;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-card);
      min-height: 380px;
      box-shadow: var(--card-shadow);
    }

    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-image {
        width: 100%;
        min-height: 280px;
        order: -1;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
    }

    /* 优势区 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--white);
      padding: 32px 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition-slow);
      border: 1px solid var(--border-light);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }

    .feature-icon {
      font-size: 2.6rem;
      margin-bottom: 1rem;
      color: var(--accent);
    }

    .feature-card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.5rem;
      color: var(--primary);
    }

    @media (max-width: 600px) {
      .features-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 服务展示 左右交替 */
    .service-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 60px;
    }

    .service-row.reverse {
      flex-direction: row-reverse;
    }

    .service-img {
      flex: 1;
      background: #e0dcd0;
      border-radius: var(--radius-img);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      aspect-ratio: 16/9;
    }

    .service-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .service-text {
      flex: 1;
    }

    .service-text h3 {
      font-size: 1.8rem;
      color: var(--primary);
      margin-bottom: 0.8rem;
    }

    .checklist {
      list-style: none;
      margin: 1.2rem 0;
    }

    .checklist li {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      margin-bottom: 0.6rem;
      color: var(--text-secondary);
    }

    .checklist i {
      color: var(--accent);
    }

    @media (max-width: 768px) {
      .service-row, .service-row.reverse {
        flex-direction: column;
      }
    }

    /* 步骤 */
    .steps {
      display: flex;
      justify-content: space-between;
      text-align: center;
      position: relative;
    }

    .step {
      flex: 1;
      position: relative;
      padding: 0 15px;
    }

    .step-num {
      width: 56px;
      height: 56px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      font-weight: 700;
      font-size: 1.5rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      font-family: var(--font-number);
    }

    .step h3 {
      margin-bottom: 0.4rem;
    }

    @media (max-width: 768px) {
      .steps {
        flex-direction: column;
        gap: 2rem;
      }
    }

    /* 数据 */
    .stats-grid {
      display: flex;
      justify-content: space-around;
      text-align: center;
      background: var(--primary);
      color: white;
      border-radius: var(--radius-card);
      padding: 40px 20px;
      flex-wrap: wrap;
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--yellow-highlight);
      font-family: var(--font-number);
    }

    /* 证言 */
    .testimonials {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
    }

    .testimonial-card {
      background: white;
      padding: 28px;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      border-left: 4px solid var(--accent);
    }

    .quote {
      font-style: italic;
      margin-bottom: 1rem;
    }

    @media (max-width: 768px) {
      .testimonials {
        grid-template-columns: 1fr;
      }
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      box-shadow: 0 1px 4px rgba(0,0,0,0.03);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.1rem;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-primary);
    }

    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-secondary);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-question {
      color: var(--primary);
    }

    /* 终局 CTA */
    .cta-section {
      background: linear-gradient(135deg, #1A3A2A 0%, #0D2118 100%);
      color: white;
      text-align: center;
      border-radius: 0;
    }

    .cta-section h2 {
      color: white;
    }

    /* 页脚 */
    .footer {
      background: #0D2118;
      color: #CCCCCC;
      padding: 50px 0 20px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .footer a:hover {
      color: var(--yellow-highlight);
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }