/* roulang page: index */
:root {
      --primary-deep-red: #C44B3C;
      --primary-dark-red: #A33D30;
      --accent-gold: #E5B887;
      --bg-warm-white: #FAF7F4;
      --white: #FFFFFF;
      --charcoal: #2E2A28;
      --mid-gray: #6B625D;
      --light-gray: #CBC5C1;
      --border-light: #E8E3DF;
      --shadow-card: 0 4px 20px rgba(44, 30, 20, 0.06);
      --shadow-card-hover: 0 8px 30px rgba(44, 30, 20, 0.12);
      --radius-card: 16px;
      --radius-pill: 50px;
      --radius-badge: 20px;
      --transition-smooth: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
      background-color: var(--bg-warm-white);
      color: var(--charcoal);
      margin: 0;
      line-height: 1.7;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: var(--primary-deep-red);
      text-decoration: none;
      transition: color var(--transition-smooth);
    }

    a:hover {
      color: var(--primary-dark-red);
    }

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

    /* 标题层级 */
    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
      margin-top: 0;
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
      color: var(--white);
    }

    h2 {
      font-size: 36px;
      color: var(--charcoal);
      margin-bottom: 1.5rem;
      text-align: center;
    }

    h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--charcoal);
    }

    .section-padding {
      padding: 100px 0;
    }

    @media screen and (max-width: 640px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 28px;
      }
      .section-padding {
        padding: 60px 0;
      }
    }

    /* 导航 */
    .top-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      background: var(--white);
      border-bottom: 1px solid var(--border-light);
      z-index: 100;
      display: flex;
      align-items: center;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--charcoal);
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }
    .logo i {
      font-size: 28px;
      color: var(--primary-deep-red);
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      margin: 0;
    }

    .nav-links a {
      color: var(--charcoal);
      font-weight: 500;
      font-size: 16px;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-deep-red);
      border-bottom-color: var(--primary-deep-red);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--charcoal);
      cursor: pointer;
    }

    @media screen and (max-width: 840px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .hamburger {
        display: block;
      }
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #C44B3C 0%, #8B3A2E 100%);
      padding: 120px 0 80px;
      margin-top: 70px;
      color: white;
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      display: flex;
      align-items: center;
      gap: 40px;
    }

    .hero-text {
      flex: 1 1 50%;
    }

    .hero-image {
      flex: 1 1 50%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 360px;
      border-radius: 24px;
      opacity: 0.95;
      box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    }

    .hero h1 {
      margin-bottom: 1rem;
    }

    .hero .subtitle {
      font-size: 18px;
      opacity: 0.9;
      max-width: 500px;
      margin-bottom: 2rem;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary-deep-red);
      color: white;
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(196,75,60,0.3);
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      background: var(--primary-dark-red);
      box-shadow: 0 6px 18px rgba(196,75,60,0.4);
      color: white;
    }

    .btn-secondary {
      background: transparent;
      color: white;
      border: 2px solid white;
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition-smooth);
      text-decoration: none;
      display: inline-block;
    }

    .btn-secondary:hover {
      background: white;
      color: var(--primary-deep-red);
    }

    @media screen and (max-width: 840px) {
      .hero-content {
        flex-direction: column;
      }
      .hero-image {
        width: 100%;
        min-height: 280px;
        order: -1;
      }
    }

    /* 卡片通用 */
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-smooth);
      height: 100%;
    }

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

    .service-icon {
      width: 64px;
      height: 64px;
      background: #FDF3E9;
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      color: var(--primary-deep-red);
      font-size: 28px;
    }

    /* 徽章墙 */
    .badge-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 24px;
    }

    .badge-item {
      background: #FDF3E9;
      border-radius: var(--radius-badge);
      padding: 24px 32px;
      text-align: center;
      min-width: 160px;
    }

    .badge-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--primary-deep-red);
      line-height: 1.2;
    }

    .badge-label {
      color: var(--charcoal);
      font-weight: 500;
      margin-top: 8px;
    }

    /* 案例卡片 */
    .case-card {
      display: flex;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      margin-bottom: 30px;
    }

    .case-img {
      flex: 0 0 40%;
      background-size: cover;
      background-position: center;
      min-height: 240px;
    }

    .case-info {
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .tag {
      background: #FDF3E9;
      color: var(--charcoal);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 14px;
      display: inline-block;
      margin-bottom: 12px;
    }

    @media screen and (max-width: 640px) {
      .case-card {
        flex-direction: column;
      }
      .case-img {
        min-height: 200px;
      }
    }

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

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

    .step-circle {
      width: 80px;
      height: 80px;
      background: var(--primary-deep-red);
      border-radius: 50%;
      margin: 0 auto 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 32px;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      background: var(--white);
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-card);
      cursor: pointer;
    }

    .faq-question {
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .faq-answer {
      margin-top: 16px;
      color: var(--mid-gray);
      display: none;
    }

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

    @media screen and (max-width: 640px) {
      .faq-grid {
        grid-template-columns: 1fr;
      }
    }

    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #C44B3C, #8B3A2E);
      padding: 80px 0;
      text-align: center;
      color: white;
    }

    .footer {
      background: #2E2A28;
      color: #CBC5C1;
      padding: 60px 0 30px;
    }

    .footer a {
      color: #CBC5C1;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

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