/* roulang page: index */
:root {
      --primary: #0F6B56;
      --primary-hover: #0a4b3c;
      --accent: #FA6400;
      --accent-hover: #d95600;
      --dark-neutral: #182320;
      --light-bg: #F5F8F6;
      --border-color: #E1E8E4;
      --text-main: #212926;
      --text-muted: #5c6863;
      --card-radius: 8px;
      --shadow-sm: 0 4px 16px rgba(15, 107, 86, 0.06);
      --shadow-accent: 0 8px 24px rgba(250, 100, 0, 0.12);
    }

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

    body {
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

    /* 顶部提示条 */
    .top-bar-announcement {
      background-color: var(--dark-neutral);
      color: #b7c5bf;
      font-size: 0.8125rem;
      line-height: 36px;
      height: 36px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-bar-announcement .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 源码产品导航规范 */
    .site-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 999;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.04);
      height: 72px;
    }
    .site-nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1rem;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
    }
    .nav-brand svg {
      width: 28px;
      height: 28px;
      fill: var(--primary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 1.75rem;
      list-style: none;
      margin: 0;
    }
    .nav-links a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    .btn {
      display: inline-block;
      font-weight: 600;
      font-size: 0.875rem;
      padding: 0.55rem 1.2rem;
      border-radius: 6px;
      cursor: pointer;
      text-align: center;
      transition: all 0.25s ease;
    }
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(15, 107, 86, 0.08);
      color: var(--primary-hover);
    }
    .btn-accent {
      background: var(--accent);
      color: #ffffff;
      border: 1px solid var(--accent);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(250, 100, 0, 0.25);
    }
    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      border: 1px solid var(--primary);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      border-color: var(--primary-hover);
    }

    /* 移动端菜单切换按钮 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 8px;
    }

    /* 通用板块排版 */
    .app-section {
      padding: 5rem 1rem;
      position: relative;
    }
    .bg-light {
      background-color: var(--light-bg);
    }
    .bg-white {
      background-color: #ffffff;
    }
    .bg-dark {
      background-color: var(--dark-neutral);
      color: #e6ede9;
    }
    .container-1200 {
      max-width: 1200px;
      margin: 0 auto;
    }
    .section-header {
      margin-bottom: 3.5rem;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(250, 100, 0, 0.1);
      padding: 0.25rem 0.75rem;
      border-radius: 4px;
      margin-bottom: 0.75rem;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 1rem;
    }
    .bg-dark .section-title {
      color: #ffffff;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .bg-dark .section-desc {
      color: #9eb2a9;
    }

    /* Hero Banner */
    .hero-banner {
      position: relative;
      background-color: var(--dark-neutral);
      background-image: linear-gradient(135deg, rgba(24, 35, 32, 0.94) 0%, rgba(15, 107, 86, 0.88) 100%), url('/assets/images/ebd54d24b607df2e.jpg');
      background-size: cover;
      background-position: center;
      color: #ffffff;
      padding: 5.5rem 1rem 6rem;
    }
    .hero-badge-wrap {
      display: flex;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
      flex-wrap: wrap;
    }
    .hero-badge {
      font-size: 0.75rem;
      padding: 0.2rem 0.6rem;
      background: rgba(255,255,255,0.15);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: 4px;
      color: #e0f2ec;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.25rem;
      color: #ffffff;
      letter-spacing: -0.5px;
    }
    .hero-p {
      font-size: 1.0625rem;
      line-height: 1.75;
      color: #d1e2dc;
      margin-bottom: 2rem;
      max-width: 620px;
    }
    .hero-cta-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .hero-visual-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      border-radius: var(--card-radius);
      padding: 1.5rem;
      box-shadow: 0 12px 36px rgba(0,0,0,0.3);
    }
    .hero-visual-card img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
    }

    /* 痛点透视区 */
    .pain-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 1.75rem;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, border-color 0.25s ease;
      border-top: 4px solid #d9534f;
    }
    .pain-card:hover {
      transform: translateY(-4px);
    }
    .pain-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
      color: var(--dark-neutral);
    }
    .pain-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 架构方案图文 */
    .solution-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .solution-content {
      padding: 2.5rem;
    }
    .spec-list {
      list-style: none;
      margin: 1.5rem 0 0 0;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }
    .spec-item {
      font-size: 0.9rem;
      background: var(--light-bg);
      padding: 0.75rem 1rem;
      border-radius: 4px;
      border-left: 3px solid var(--primary);
    }
    .spec-item strong {
      display: block;
      color: var(--primary);
      margin-bottom: 2px;
    }

    /* 核心优势卡片 */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 2rem;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 12px 28px rgba(15, 107, 86, 0.12);
      border-color: var(--primary);
    }
    .feature-icon-wrapper {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background: rgba(15, 107, 86, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .feature-title {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
    }
    .feature-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 产品形态矩阵对比 */
    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 2.5rem 1.75rem;
      height: 100%;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .pricing-card.featured {
      border: 2px solid var(--accent);
      box-shadow: var(--shadow-accent);
      transform: scale(1.02);
    }
    .featured-ribbon {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent);
      color: #ffffff;
      padding: 0.2rem 1rem;
      font-size: 0.75rem;
      font-weight: 700;
      border-radius: 12px;
      text-transform: uppercase;
    }
    .pricing-name {
      font-size: 1.35rem;
      font-weight: 800;
      text-align: center;
      margin-bottom: 0.5rem;
    }
    .pricing-target {
      font-size: 0.875rem;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 1.5rem;
    }
    .pricing-features {
      list-style: none;
      margin: 1.5rem 0;
      flex-grow: 1;
    }
    .pricing-features li {
      padding: 0.5rem 0;
      font-size: 0.9rem;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: 800;
    }

    /* 深色理念区 */
    .dark-flow-wrap {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 1.5rem;
      margin-top: 2rem;
    }
    .dark-flow-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 1.75rem;
      border-radius: var(--card-radius);
    }
    .dark-flow-step {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 0.5rem;
    }

    /* 四阶推进步骤 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 1.75rem 1.25rem;
      position: relative;
    }
    .step-number {
      font-size: 2.25rem;
      font-weight: 900;
      color: rgba(15, 107, 86, 0.15);
      line-height: 1;
      margin-bottom: 0.5rem;
    }
    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 成果指标带 */
    .metrics-bar {
      background: linear-gradient(135deg, var(--primary) 0%, #08493a 100%);
      color: #ffffff;
      padding: 3.5rem 1rem;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-value {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.1;
      color: #ffffff;
      margin-bottom: 0.25rem;
      font-family: monospace, sans-serif;
    }
    .metric-label {
      font-size: 0.9375rem;
      color: #cae3db;
    }

    /* 案例混排 */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      margin-bottom: 2rem;
      box-shadow: var(--shadow-sm);
    }
    .case-img {
      width: 100%;
      height: 280px;
      object-fit: cover;
      display: block;
    }
    .case-inner {
      padding: 2rem;
    }

    /* 口碑评价 */
    .quote-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 2rem;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .quote-text {
      font-size: 0.9375rem;
      color: var(--text-main);
      font-style: italic;
      margin-bottom: 1.5rem;
      line-height: 1.7;
    }
    .quote-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 1rem;
    }
    .quote-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--light-bg);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-color);
    }

    /* 资讯动态 */
    .news-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .news-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    .news-body {
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 0.5rem;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .news-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }

    /* FAQ 手风琴重构 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: 6px;
      margin-bottom: 0.75rem;
      background: #ffffff;
      overflow: hidden;
    }
    .accordion-title {
      padding: 1.25rem 1.5rem;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: #ffffff;
      border: none;
    }
    .accordion-title:hover {
      background: var(--light-bg);
      color: var(--primary);
    }
    .accordion-content {
      padding: 1.25rem 1.5rem;
      background: #fafcfb;
      border-top: 1px solid var(--border-color);
      font-size: 0.9375rem;
      line-height: 1.7;
      color: var(--text-muted);
      display: none;
    }
    .accordion-item.is-active .accordion-content {
      display: block;
    }

    /* 商业转化行动区 */
    .contact-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      box-shadow: 0 10px 30px rgba(0,0,0,0.06);
      overflow: hidden;
    }
    .contact-form-side {
      padding: 3rem 2.5rem;
    }
    .contact-info-side {
      background: var(--primary);
      color: #ffffff;
      padding: 3rem 2.5rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .form-group {
      margin-bottom: 1.25rem;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 0.4rem;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9375rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 2px rgba(15, 107, 86, 0.15);
    }

    /* 页脚设计 */
    .site-footer {
      background-color: var(--dark-neutral);
      color: #8c9e97;
      padding: 4.5rem 1rem 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-col-title {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 0.6rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      margin-top: 3.5rem;
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      text-align: center;
      font-size: 0.8125rem;
      color: #63756f;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .step-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .pricing-card.featured {
        transform: none;
      }
      .spec-list {
        grid-template-columns: 1fr;
      }
    }