/* roulang page: index */
:root {
      --primary-green: #0A6E4F;
      --deep-gray: #1E1E24;
      --electric-orange: #F85E3A;
      --warm-white: #FAFAF7;
      --pure-white: #FFFFFF;
      --border-light: #E2E8E4;
      --text-body: #4A4A55;
      --text-muted: #6B6B78;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --shadow-glow: 0 0 20px rgba(248,94,58,0.4);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 50px;
      --transition-smooth: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1.0);
      --max-width: 1280px;
      --spacing-section: 80px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      background-color: var(--warm-white);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
      :root {
        --spacing-section: 60px;
      }
    }
    h1, h2, h3 {
      color: var(--deep-gray);
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    h1 {
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
    }
    h2 {
      font-size: 36px;
      margin-bottom: 16px;
    }
    h3 {
      font-size: 20px;
    }
    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      h2 { font-size: 28px; }
      h3 { font-size: 18px; }
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-smooth);
      font-weight: 600;
    }
    /* 导航 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary-green);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 0.5px;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--primary-green);
      border-radius: 50% 50% 0 50%;
      display: inline-block;
      transform: rotate(45deg);
      margin-right: 4px;
    }
    .nav-menu {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      color: var(--deep-gray);
      transition: color 0.2s;
      font-size: 15px;
    }
    .nav-link:hover {
      color: var(--primary-green);
    }
    .nav-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    .btn-login {
      background: transparent;
      border: 2px solid var(--electric-orange);
      color: var(--electric-orange);
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-login:hover {
      background: var(--electric-orange);
      color: white;
    }
    .btn-primary {
      background: var(--primary-green);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-primary:hover {
      background: #085A42;
      transform: scale(1.02);
    }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
    }
    .mobile-toggle span {
      width: 25px;
      height: 2px;
      background: var(--deep-gray);
      transition: 0.2s;
    }
    @media (max-width: 768px) {
      .nav-menu, .nav-actions {
        display: none;
      }
      .mobile-toggle {
        display: flex;
      }
      .mobile-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: white;
        padding: 24px;
        box-shadow: var(--shadow-md);
        gap: 20px;
      }
    }
    /* Hero */
    .hero {
      display: flex;
      align-items: center;
      min-height: 80vh;
      background: var(--warm-white);
      overflow: hidden;
      position: relative;
    }
    .hero-content {
      flex: 1;
      padding-right: 40px;
    }
    .hero-title {
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 20px;
      color: var(--text-body);
      margin-bottom: 12px;
    }
    .hero-trust {
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-pill {
      background: var(--electric-orange);
      color: white;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      font-size: 18px;
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(248,94,58,0.25);
    }
    .btn-pill:hover {
      box-shadow: var(--shadow-glow);
      transform: scale(1.02);
    }
    .btn-outline {
      border: 2px solid var(--primary-green);
      color: var(--primary-green);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline:hover {
      background: var(--primary-green);
      color: white;
    }
    .hero-visual {
      flex: 1;
      position: relative;
      min-height: 400px;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10,110,79,0.25) 0%, rgba(30,30,36,0.5) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .geometric-shape {
      width: 140px;
      height: 140px;
      border: 2px solid rgba(255,255,255,0.5);
      border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
      transform: rotate(15deg);
      backdrop-filter: blur(6px);
    }
    @media (max-width: 768px) {
      .hero {
        flex-direction: column;
        text-align: center;
        padding: 40px 0;
      }
      .hero-content {
        padding-right: 0;
        margin-bottom: 32px;
      }
      .hero-buttons {
        justify-content: center;
      }
    }
    /* 板块通用 */
    section {
      padding: var(--spacing-section) 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      display: inline-block;
      position: relative;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 40px;
      height: 4px;
      background: var(--electric-orange);
      border-radius: 2px;
    }
    /* 优势区非对称 */
    .advantages-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .adv-left {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .adv-card {
      background: var(--pure-white);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }
    .adv-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .adv-icon {
      font-size: 32px;
      color: var(--primary-green);
      margin-bottom: 12px;
    }
    @media (max-width: 768px) {
      .advantages-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 服务卡片网格 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
    }
    .service-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .card-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .badge-hot {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(248,94,58,0.9);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
    }
    .card-body {
      padding: 20px;
    }
    .card-body h3 {
      margin-bottom: 8px;
    }
    .btn-text {
      color: var(--primary-green);
      font-weight: 600;
      margin-top: 12px;
      display: inline-block;
    }
    @media (max-width: 1024px) {
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 520px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 数据带 */
    .stats-band {
      background: var(--deep-gray);
      color: white;
      padding: 48px 0;
    }
    .stats-flex {
      display: flex;
      justify-content: space-around;
      text-align: center;
      flex-wrap: wrap;
    }
    .stat-item {
      font-size: 36px;
      font-weight: 700;
      font-family: 'Inter', sans-serif;
    }
    /* 流程 */
    .steps-line {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
    }
    .step {
      text-align: center;
      flex: 1;
    }
    .step-num {
      width: 48px;
      height: 48px;
      background: var(--primary-green);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
      font-weight: 700;
    }
    @media (max-width: 768px) {
      .steps-line {
        flex-direction: column;
        gap: 24px;
      }
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #F5F6F5;
      padding: 0 20px;
      margin-top: 8px;
      border-radius: 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 20px;
    }
    /* CTA */
    .cta-dark {
      background: var(--deep-gray);
      text-align: center;
      color: white;
      border-radius: 24px;
      padding: 64px 24px;
    }
    .footer {
      background: var(--deep-gray);
      color: #A0A4A8;
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }