/* roulang page: index */
:root {
      --c-primary: #0A3622;
      --c-primary-light: #134e32;
      --c-accent: #FF5A1F;
      --c-accent-hover: #e04b16;
      --c-bg-subtle: #F4F6F4;
      --c-bg-white: #FFFFFF;
      --c-text-main: #141B17;
      --c-text-muted: #5C6861;
      --c-border: #E1E6E2;
      --c-dark-block: #061D12;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(10, 54, 34, 0.05);
      --shadow-md: 0 10px 24px rgba(10, 54, 34, 0.08);
      --shadow-hover: 0 16px 36px rgba(10, 54, 34, 0.14);
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--c-text-main);
      background-color: var(--c-bg-white);
      line-height: 1.75;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }

    /* 顶部服务信息栏 */
    .top-bar {
      background-color: #f8faf8;
      border-bottom: 1px solid var(--c-border);
      font-size: 0.85rem;
      color: var(--c-text-muted);
      padding: 6px 0;
    }

    /* 主导航 */
    .main-header {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--c-border);
      position: sticky;
      top: 0;
      z-index: 1030;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--c-primary);
      font-weight: 800;
      font-size: 1.35rem;
      letter-spacing: -0.5px;
    }
    .brand-icon-badge {
      width: 38px;
      height: 38px;
      background: var(--c-primary);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      font-size: 1.1rem;
    }
    .nav-link {
      color: var(--c-text-main);
      font-weight: 500;
      padding: 0.5rem 0.9rem !important;
      transition: var(--transition);
      font-size: 0.95rem;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--c-accent);
    }

    .btn-brand-accent {
      background-color: var(--c-accent);
      color: #fff;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid var(--c-accent);
      padding: 0.55rem 1.4rem;
      transition: var(--transition);
    }
    .btn-brand-accent:hover {
      background-color: var(--c-accent-hover);
      color: #fff;
      box-shadow: 0 6px 16px rgba(255, 90, 31, 0.3);
      transform: translateY(-1px);
    }
    .btn-brand-outline {
      background: transparent;
      color: var(--c-primary);
      border: 1px solid var(--c-primary);
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 0.55rem 1.3rem;
      transition: var(--transition);
    }
    .btn-brand-outline:hover {
      background: var(--c-primary);
      color: #fff;
    }

    /* 板块通用间距 */
    section {
      padding: 85px 0;
      position: relative;
    }
    .bg-subtle-layer {
      background-color: var(--c-bg-subtle);
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-eyebrow {
      color: var(--c-accent);
      font-size: 0.88rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--c-primary);
      letter-spacing: -0.5px;
      line-height: 1.3;
    }
    .section-lead {
      color: var(--c-text-muted);
      font-size: 1.05rem;
      max-width: 780px;
      margin: 12px auto 0;
    }

    /* 首屏堆叠卡片区 */
    .hero-stack-section {
      background: radial-gradient(circle at 10% 20%, rgba(10, 54, 34, 0.04) 0%, rgba(255, 255, 255, 1) 90%), url('/assets/images/5a0bbcd3d0a3be9a.jpg') center/cover no-repeat;
      position: relative;
      padding: 70px 0 100px;
      border-bottom: 1px solid var(--c-border);
    }
    .hero-stack-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(255, 255, 255, 0.94);
      z-index: 1;
    }
    .hero-content-wrap {
      position: relative;
      z-index: 2;
    }
    .hero-tag {
      background-color: rgba(255, 90, 31, 0.1);
      color: var(--c-accent);
      font-size: 0.85rem;
      padding: 6px 14px;
      border-radius: 30px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .hero-title {
      font-size: 3.1rem;
      font-weight: 800;
      color: var(--c-primary);
      line-height: 1.25;
      margin: 18px 0;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--c-text-muted);
      line-height: 1.8;
      max-width: 820px;
      margin: 0 auto 30px;
    }

    /* 堆叠三卡 */
    .stack-cards-wrapper {
      position: relative;
      margin-top: 35px;
    }
    .stack-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      overflow: hidden;
      height: 100%;
    }
    .stack-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(10, 54, 34, 0.2);
    }
    .stack-card.featured-card {
      border: 2px solid var(--c-primary);
      transform: scale(1.03);
      z-index: 3;
    }
    .stack-card.featured-card:hover {
      transform: scale(1.03) translateY(-5px);
    }
    .stack-card-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .stack-card-body {
      padding: 24px;
    }

    /* 倒计时看板条 */
    .countdown-banner {
      background: var(--c-primary);
      color: #fff;
      padding: 30px 0;
      box-shadow: var(--shadow-sm);
    }
    .countdown-timer-box {
      background: rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-sm);
      padding: 8px 16px;
      text-align: center;
      min-width: 75px;
    }
    .countdown-timer-box .time-num {
      font-size: 1.6rem;
      font-weight: 800;
      color: #fff;
      display: block;
      line-height: 1.2;
    }
    .countdown-timer-box .time-unit {
      font-size: 0.72rem;
      color: rgba(255, 255, 255, 0.75);
    }

    /* 指标卡 */
    .metric-card {
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--c-accent);
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--c-primary);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    /* 6大优势网格 */
    .advantage-box {
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: var(--transition);
      height: 100%;
    }
    .advantage-box:hover {
      border-color: var(--c-accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .adv-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--c-bg-subtle);
      color: var(--c-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      margin-bottom: 18px;
    }

    /* 对比表格面板 */
    .comparison-panel {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--c-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }
    .comp-header {
      padding: 20px;
      font-weight: 700;
    }
    .comp-header-old {
      background: #f1f3f1;
      color: #555;
    }
    .comp-header-new {
      background: var(--c-primary);
      color: #fff;
    }
    .comp-row {
      border-bottom: 1px solid var(--c-border);
      padding: 16px 20px;
      font-size: 0.95rem;
    }
    .comp-row:last-child {
      border-bottom: none;
    }

    /* 沉浸深色体验区 */
    .dark-experience-zone {
      background-color: var(--c-dark-block);
      color: #fff;
      padding: 90px 0;
    }
    .dark-experience-zone .section-title {
      color: #fff;
    }
    .dark-experience-zone .section-lead {
      color: rgba(255, 255, 255, 0.7);
    }
    .dark-glass-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      transition: var(--transition);
    }
    .dark-glass-card:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--c-accent);
      transform: translateY(-4px);
    }

    /* 纵向/横向动线里程碑 */
    .timeline-node {
      position: relative;
      padding-left: 30px;
      border-left: 2px dashed rgba(10, 54, 34, 0.2);
      margin-bottom: 30px;
    }
    .timeline-node::before {
      content: '';
      position: absolute;
      left: -9px;
      top: 4px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #fff;
      border: 3px solid var(--c-accent);
    }

    /* 资讯卡 */
    .news-card {
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border);
      background: #fff;
      overflow: hidden;
      height: 100%;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .news-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--c-primary);
    }
    .news-card-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .news-card-content {
      padding: 22px;
    }

    /* 手风琴改造 */
    .accordion-item {
      border: 1px solid var(--c-border);
      margin-bottom: 12px;
      border-radius: var(--radius-sm) !important;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 700;
      color: var(--c-primary);
      background: #fff;
      padding: 18px 22px;
      font-size: 1.05rem;
    }
    .accordion-button:not(.collapsed) {
      color: var(--c-accent);
      background-color: var(--c-bg-subtle);
      box-shadow: none;
      border-left: 4px solid var(--c-accent);
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--c-border);
    }
    .accordion-body {
      color: var(--c-text-muted);
      line-height: 1.8;
      padding: 18px 22px 22px;
    }

    /* 底部表单 */
    .cta-form-card {
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    /* 页脚 */
    .footer-dark {
      background-color: #04140c;
      color: #9AA7A0;
      padding: 70px 0 25px;
      font-size: 0.92rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-dark h5 {
      color: #fff;
      font-weight: 700;
      font-size: 1.05rem;
      margin-bottom: 20px;
    }
    .footer-dark a {
      color: #9AA7A0;
      text-decoration: none;
      transition: var(--transition);
      display: inline-block;
      margin-bottom: 8px;
    }
    .footer-dark a:hover {
      color: var(--c-accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 45px;
      padding-top: 25px;
      font-size: 0.85rem;
    }

    /* 响应式调整 */
    @media (max-width: 991px) {
      .hero-title { font-size: 2.25rem; }
      .stack-card.featured-card { transform: none; margin-top: 15px; }
      .stack-card.featured-card:hover { transform: translateY(-5px); }
    }
    @media (max-width: 575px) {
      .hero-title { font-size: 1.85rem; }
      section { padding: 60px 0; }
      .section-title { font-size: 1.7rem; }
      .cta-form-card { padding: 24px; }
    }