/* roulang page: index */
:root {
      --deep-green: #1A3C40;
      --warm-gold: #E8B86D;
      --warm-bg: #FBF7F2;
      --text-dark: #1E1E1E;
      --text-muted: #5A5A5A;
      --coral-red: #D94F4F;
      --coral-hover: #C13E3E;
      --card-bg: #FFFFFF;
      --card-border: #E8DDD0;
      --metric-bg: #F0EBE3;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-sm: 0 2px 12px rgba(26,60,64,0.06);
      --shadow-hover: 0 8px 24px rgba(26,60,64,0.12);
      --transition: 0.2s ease;
      --font-mono: 'SF Mono', 'Menlo', 'Consolas', monospace;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: #FFFFFF;
      border-bottom: 1px solid var(--card-border);
      height: 64px;
      z-index: 50;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .nav-logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--deep-green);
      display: flex;
      align-items: center;
      gap: 6px;
      text-decoration: none;
    }
    .nav-logo i {
      font-size: 20px;
      color: var(--warm-gold);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 400;
      color: var(--text-muted);
      text-decoration: none;
      transition: color var(--transition);
      padding: 4px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover {
      color: var(--deep-green);
      border-bottom-color: var(--warm-gold);
    }
    .nav-cta {
      background: var(--coral-red);
      color: white !important;
      padding: 8px 18px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 14px;
      transition: background var(--transition);
      border-bottom: none !important;
    }
    .nav-cta:hover {
      background: var(--coral-hover);
      color: white !important;
    }
    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--deep-green);
      cursor: pointer;
      background: none;
      border: none;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 16px 24px;
        gap: 12px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.08);
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
      .nav-cta {
        align-self: flex-start;
      }
    }
    /* 板块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
    }
    /* Hero */
    #hero {
      padding-top: 120px;
      background-color: var(--warm-bg);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-geo {
      position: absolute;
      right: -80px;
      top: 40px;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle at 30% 30%, rgba(26,60,64,0.08) 0%, transparent 70%);
      border-radius: 50%;
      z-index: 0;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 7fr 5fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 44px;
      font-weight: 700;
      color: var(--deep-green);
      line-height: 1.3;
      margin-bottom: 20px;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--coral-red);
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      display: inline-block;
      transition: background var(--transition);
    }
    .btn-primary:hover {
      background: var(--coral-hover);
      color: white;
    }
    .btn-outline {
      background: transparent;
      color: var(--deep-green);
      border: 2px solid var(--deep-green);
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--deep-green);
      color: white;
    }
    .mini-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .mini-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .mini-number {
      font-family: var(--font-mono);
      font-size: 28px;
      font-weight: 700;
      color: var(--deep-green);
    }
    .mini-label {
      font-size: 13px;
      color: var(--text-muted);
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 32px;
      }
    }
    /* 指标看板 */
    .metrics-row {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      flex-wrap: wrap;
    }
    .metric-item {
      flex: 1 1 200px;
      background: var(--metric-bg);
      padding: 24px;
      border-radius: var(--radius-card);
      text-align: center;
    }
    .metric-number {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 700;
      color: var(--deep-green);
      margin-bottom: 8px;
      position: relative;
      display: inline-block;
    }
    .metric-number::after {
      content: '';
      display: block;
      width: 40px;
      height: 3px;
      background: var(--warm-gold);
      margin: 8px auto 0;
      border-radius: 2px;
    }
    .metric-label {
      font-size: 16px;
      color: var(--text-muted);
    }
    /* 核心优势 */
    .cards-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .adv-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
    }
    .adv-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .adv-icon {
      font-size: 48px;
      color: var(--deep-green);
      margin-bottom: 20px;
    }
    .adv-title {
      font-weight: 600;
      font-size: 20px;
      margin-bottom: 12px;
    }
    @media (max-width: 768px) {
      .cards-3 {
        grid-template-columns: 1fr;
      }
    }
    /* 服务矩阵 2x3 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      font-size: 40px;
      color: var(--deep-green);
      margin-bottom: 16px;
    }
    .service-link {
      color: var(--coral-red);
      font-weight: 500;
      text-decoration: none;
    }
    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 流程 */
    .process-row {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 20px;
    }
    .step {
      text-align: center;
      flex: 1;
    }
    .step-circle {
      width: 48px;
      height: 48px;
      background: var(--deep-green);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 20px;
      margin: 0 auto 16px;
    }
    @media (max-width: 768px) {
      .process-row {
        flex-direction: column;
      }
    }
    /* 对比 */
    .compare-row {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 20px;
      align-items: center;
    }
    .compare-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .compare-left {
      background: #f0f0f0;
    }
    .compare-right {
      background: var(--deep-green);
      color: white;
      border: 2px solid var(--warm-gold);
    }
    .vs-badge {
      background: white;
      border-radius: 50%;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--deep-green);
      box-shadow: var(--shadow-sm);
      font-size: 18px;
    }
    @media (max-width: 768px) {
      .compare-row {
        grid-template-columns: 1fr;
      }
    }
    /* FAQ */
    .faq-item {
      background: var(--warm-bg);
      border-radius: var(--radius-card);
      margin-bottom: 12px;
      padding: 16px 24px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-question {
      font-weight: 600;
      color: var(--deep-green);
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      color: var(--text-muted);
      margin-top: 12px;
      display: none;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
      border-left: 3px solid var(--warm-gold);
      padding-left: 16px;
    }
    /* CTA 区 */
    .cta-block {
      background: var(--coral-red);
      color: white;
      text-align: center;
      padding: 64px 20px;
      border-radius: 0;
    }
    .cta-form input {
      margin: 8px;
      padding: 12px;
      border-radius: var(--radius-btn);
      border: none;
    }
    .trust-badges i {
      margin: 0 8px;
      color: var(--warm-gold);
    }
    /* 页脚 */
    .footer {
      background: var(--deep-green);
      color: white;
      padding: 48px 20px;
    }
    .footer a {
      color: #ccc;
      text-decoration: none;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }