/* roulang page: index */
:root {
      --primary: #0F4C81;
      --primary-dark: #0B192C;
      --primary-light: #1D6FB8;
      --accent-green: #00A86B;
      --accent-blue: #2563EB;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-card: 12px;
      --radius-pill: 9999px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 76, 129, 0.06);
      --shadow-hover: 0 12px 30px -4px rgba(15, 76, 129, 0.14);
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      margin: 0;
      padding: 0;
      line-height: 1.65;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover, a:focus { color: var(--accent-blue); }
    img { max-width: 100%; height: auto; display: block; }

    /* 顶栏双行架构 */
    .utility-header {
      background: #0B192C;
      color: #94A3B8;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 6px 0;
    }
    .utility-wrap {
      max-width: 1300px;
      margin: 0 auto;
      padding: 0 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      color: #CBD5E1;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 0 0 rgba(0, 168, 107, 0.7);
      animation: pulse 1.8s infinite;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 0 0 rgba(0, 168, 107, 0.7); }
      70% { box-shadow: 0 0 0 8px rgba(0, 168, 107, 0); }
      100% { box-shadow: 0 0 0 0 rgba(0, 168, 107, 0); }
    }
    .utility-links {
      display: flex;
      gap: 18px;
      align-items: center;
    }
    .utility-links span, .utility-links a { color: #94A3B8; font-size: 12px; }

    .main-header {
      background: var(--bg-white);
      position: sticky;
      top: 0;
      z-index: 999;
      box-shadow: 0 2px 12px rgba(15, 76, 129, 0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .header-container {
      max-width: 1300px;
      margin: 0 auto;
      padding: 12px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
    }
    .brand-logo-icon {
      width: 34px;
      height: 34px;
      background: linear-gradient(135deg, var(--primary), var(--accent-blue));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 18px;
      font-weight: 900;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 22px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-menu a {
      color: var(--text-body);
      font-weight: 500;
      font-size: 15px;
      padding: 6px 0;
      position: relative;
    }
    .nav-menu a:hover {
      color: var(--primary);
    }
    .nav-btn {
      background: var(--accent-blue);
      color: #fff !important;
      padding: 9px 20px !important;
      border-radius: var(--radius-pill);
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }
    .nav-btn:hover {
      background: var(--primary);
      box-shadow: 0 6px 18px rgba(15, 76, 129, 0.35);
      transform: translateY(-1px);
    }

    /* 移动端菜单控制 */
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
      padding: 8px;
    }

    /* 基础通用板块 */
    .page-section {
      padding: 90px 0;
      position: relative;
    }
    .section-white { background-color: var(--bg-white); }
    .section-light { background-color: var(--bg-light); }
    .section-dark {
      background-color: var(--primary-dark);
      color: #F8FAFC;
    }

    .section-header {
      margin-bottom: 54px;
      max-width: 820px;
    }
    .section-header.text-center { margin-left: auto; margin-right: auto; }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-blue);
      background: rgba(37, 99, 235, 0.08);
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-dark .section-tag {
      background: rgba(255,255,255,0.1);
      color: #38BDF8;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-dark .section-title { color: #FFFFFF; }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
    }
    .section-dark .section-desc { color: #94A3B8; }

    /* Hero 全宽视频遮罩与试用 */
    .hero-banner {
      position: relative;
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.92) 0%, rgba(15, 76, 129, 0.88) 100%),
                  url('/assets/images/fc59c259c8a8e7a9.png') center/cover no-repeat;
      padding: 110px 0 100px;
      color: #FFFFFF;
      overflow: hidden;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-p {
      font-size: 17px;
      color: #CBD5E1;
      line-height: 1.8;
      max-width: 680px;
      margin-bottom: 34px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent-blue);
      color: #FFFFFF !important;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
      cursor: pointer;
    }
    .btn-main:hover {
      background: #1D4ED8;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
    }
    .btn-outline-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.35);
      color: #FFFFFF !important;
      padding: 13px 26px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      backdrop-filter: blur(4px);
    }
    .btn-outline-white:hover {
      background: rgba(255, 255, 255, 0.22);
      border-color: #FFFFFF;
      transform: translateY(-2px);
    }
    .hero-stats-bar {
      margin-top: 48px;
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .hero-stat-num {
      font-size: 28px;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1;
      margin-bottom: 6px;
    }
    .hero-stat-label {
      font-size: 13px;
      color: #94A3B8;
    }

    .hero-preview-box {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      position: relative;
    }
    .preview-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 14px;
      margin-bottom: 18px;
    }
    .preview-title {
      font-size: 14px;
      font-weight: 600;
      color: #E2E8F0;
    }
    .radar-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 12px;
    }
    .radar-item {
      background: rgba(255, 255, 255, 0.05);
      padding: 12px;
      border-radius: var(--radius-sm);
    }
    .radar-label { font-size: 12px; color: #94A3B8; display: block; margin-bottom: 4px; }
    .radar-val { font-size: 17px; font-weight: 700; color: var(--accent-green); }

    /* 通用卡片规范 */
    .data-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .data-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: #CBD5E1;
    }
    .card-icon {
      width: 48px;
      height: 48px;
      background: rgba(15, 76, 129, 0.08);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 20px;
    }
    .card-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .card-text {
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.68;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    /* 指标看板展示 */
    .metric-value-box {
      font-size: 34px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin: 12px 0 8px;
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    .metric-value-box span { font-size: 14px; font-weight: 500; color: var(--text-muted); }
    .metric-trend {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent-green);
      background: rgba(0, 168, 107, 0.1);
      padding: 3px 8px;
      border-radius: 4px;
    }
    .progress-bar-bg {
      height: 6px;
      background: #E2E8F0;
      border-radius: 3px;
      overflow: hidden;
      margin-top: 14px;
    }
    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
      border-radius: 3px;
    }

    /* 对比表格 */
    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #fff;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
      font-size: 15px;
    }
    .compare-table td { font-size: 14.5px; }
    .compare-table tr:last-child td { border-bottom: none; }
    .badge-check {
      color: var(--accent-green);
      font-weight: 700;
    }
    .badge-cross {
      color: #94A3B8;
    }

    /* 里程碑时间线 */
    .timeline-wrap {
      position: relative;
      padding-left: 30px;
    }
    .timeline-wrap::before {
      content: '';
      position: absolute;
      left: 7px;
      top: 6px;
      bottom: 6px;
      width: 2px;
      background: var(--border-color);
    }
    .timeline-node {
      position: relative;
      margin-bottom: 34px;
    }
    .timeline-node:last-child { margin-bottom: 0; }
    .timeline-dot {
      position: absolute;
      left: -30px;
      top: 4px;
      width: 16px;
      height: 16px;
      background: #fff;
      border: 3px solid var(--accent-blue);
      border-radius: 50%;
    }
    .timeline-time {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent-blue);
      margin-bottom: 4px;
      display: inline-block;
    }
    .timeline-h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    /* FAQ 手风琴自定义 */
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: 0 2px 8px rgba(15, 76, 129, 0.03);
    }
    .faq-title {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      transition: var(--transition);
    }
    .faq-title:hover {
      background: #F8FAFC;
    }
    .faq-indicator {
      font-size: 20px;
      color: var(--accent-blue);
      font-weight: bold;
      transition: transform 0.25s ease;
    }
    .faq-body {
      padding: 0 24px 20px;
      font-size: 14.5px;
      color: var(--text-body);
      line-height: 1.7;
      display: none;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }
    .faq-item.active .faq-body { display: block; }
    .faq-item.active .faq-indicator { transform: rotate(45deg); }

    /* 表单组件 */
    .form-card {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 38px;
      border: 1px solid var(--border-color);
      box-shadow: 0 16px 40px -4px rgba(15, 76, 129, 0.08);
    }
    .form-group { margin-bottom: 20px; }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 7px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      height: 46px;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #F8FAFC;
      transition: var(--transition);
    }
    .form-textarea { height: 100px; resize: vertical; }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--accent-blue);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    /* 页脚 */
    .site-footer {
      background: #0B192C;
      color: #94A3B8;
      padding: 70px 0 24px;
      font-size: 14px;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-col-title {
      font-size: 16px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 20px;
    }
    .footer-links { list-style: none; padding: 0; margin: 0; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: #94A3B8; }
    .footer-links a:hover { color: #38BDF8; }
    .copyright-row {
      margin-top: 50px;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 13px;
      text-align: center;
      color: #64748B;
    }

    /* 响应式样式 */
    @media screen and (max-width: 1024px) {
      .hero-h1 { font-size: 34px; }
      .section-title { font-size: 28px; }
      .page-section { padding: 70px 0; }
      .hero-stats-bar { grid-template-columns: 1fr; }
    }
    @media screen and (max-width: 768px) {
      .utility-header { display: none; }
      .mobile-menu-toggle { display: block; }
      .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.06);
        gap: 16px;
      }
      .nav-menu.open { display: flex; }
      .hero-banner { padding: 60px 0; }
      .form-card { padding: 22px; }
      .compare-table { display: block; overflow-x: auto; }
    }