/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --accent: #3B82F6;
      --accent-teal: #0D9488;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-light: #F8FAFC;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.75;
      letter-spacing: 0.01em;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部顶栏与导航 */
    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }

    .logo-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #FFF;
      font-size: 18px;
      font-weight: 800;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 0;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      min-height: 44px;
      min-width: 44px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(30, 64, 175, 0.2);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(30, 64, 175, 0.28);
    }

    .btn-outline {
      background-color: #FFFFFF;
      color: var(--primary);
      border-color: #CBD5E1;
    }

    .btn-outline:hover {
      background-color: #F8FAFC;
      border-color: var(--primary);
      color: var(--primary-hover);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* 板块通用体系 */
    .section-padding {
      padding-top: clamp(64px, 8vw, 104px);
      padding-bottom: clamp(64px, 8vw, 104px);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      background-color: #EFF6FF;
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 14px;
      border: 1px solid #DBEAFE;
    }

    .section-title {
      font-size: clamp(26px, 3.2vw, 36px);
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* 板块1：全宽浅色顶栏+矮横幅 Hero */
    .hero-strip {
      background: linear-gradient(180deg, #FFFFFF 0%, #EFF6FF 100%);
      padding-top: clamp(48px, 6vw, 76px);
      padding-bottom: clamp(48px, 6vw, 76px);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-h1 {
      font-size: clamp(30px, 3.8vw, 46px);
      color: var(--text-main);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-summary {
      font-size: 16px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .hero-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      border: 1px solid #CBD5E1;
    }

    .hero-visual img {
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    .hero-badge-overlay {
      position: absolute;
      bottom: 16px;
      left: 16px;
      right: 16px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      color: #FFF;
      padding: 12px 18px;
      border-radius: var(--radius-sm);
      display: flex;
      justify-content: space-between;
      font-size: 13px;
    }

    /* 板块2：内容日历 */
    .calendar-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .calendar-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .calendar-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }

    .calendar-date {
      font-size: 13px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .calendar-card h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .calendar-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .status-pill {
      display: inline-block;
      align-self: flex-start;
      font-size: 12px;
      padding: 3px 10px;
      border-radius: 4px;
      background-color: #F1F5F9;
      color: var(--text-body);
      font-weight: 500;
    }

    /* 板块3：热门专题 */
    .topics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .topic-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .topic-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }

    .topic-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .topic-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .topic-item:hover .topic-thumb img {
      transform: scale(1.05);
    }

    .topic-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .topic-meta {
      font-size: 12px;
      color: var(--accent-teal);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .topic-body h3 {
      font-size: 19px;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }

    .topic-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .topic-link {
      font-size: 14px;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块4：观点解读 */
    .viewpoint-wrapper {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .viewpoint-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-left: 5px solid var(--primary);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      padding: 30px;
      box-shadow: var(--shadow-card);
    }

    .viewpoint-tag {
      font-size: 12px;
      color: var(--primary);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 12px;
    }

    .viewpoint-card h3 {
      font-size: 20px;
      color: var(--text-main);
      margin-bottom: 14px;
      font-weight: 700;
    }

    .viewpoint-card p {
      font-size: 15px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 16px;
    }

    .viewpoint-author {
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

    /* 板块5：资讯列表 */
    .news-strip-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .news-row {
      display: grid;
      grid-template-columns: 240px 1fr auto;
      gap: 28px;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-card);
    }

    .news-row:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
      transform: translateX(4px);
    }

    .news-row-img {
      height: 120px;
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    .news-row-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .news-row-content h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 8px;
      font-weight: 700;
    }

    .news-row-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 8px;
    }

    .news-row-meta {
      font-size: 12px;
      color: var(--accent-teal);
      font-weight: 600;
    }

    .news-action {
      padding-left: 12px;
    }

    /* 板块6：媒体精选 */
    .media-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }

    .media-source {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .media-card h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
      font-weight: 700;
    }

    .media-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块7：深色理念与数据分析 */
    .metrics-dark-section {
      background-color: var(--bg-dark);
      color: var(--text-light);
      border-bottom: 1px solid #1E293B;
    }

    .metrics-dark-section .section-title {
      color: #FFFFFF;
    }

    .metrics-dark-section .section-desc {
      color: #94A3B8;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 40px;
    }

    .metric-card {
      background: #1E293B;
      border: 1px solid #334155;
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      transition: var(--transition);
    }

    .metric-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }

    .metric-val {
      font-size: clamp(34px, 4vw, 48px);
      font-weight: 800;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 10px;
    }

    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 6px;
    }

    .metric-detail {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 板块8：安全审计摘要与合规标准 */
    .audit-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .audit-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }

    .audit-box-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .audit-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background-color: #ECFDF5;
      color: #059669;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .audit-box h3 {
      font-size: 17px;
      color: var(--text-main);
      font-weight: 700;
    }

    .audit-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块9：参数速览与能力规格表 */
    .specs-table-wrapper {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-card);
    }

    .specs-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .specs-table th, .specs-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .specs-table th {
      background-color: #F8FAFC;
      color: var(--text-main);
      font-weight: 700;
    }

    .specs-table td {
      color: var(--text-body);
    }

    .specs-table tr:last-child td {
      border-bottom: none;
    }

    .tag-support {
      color: #059669;
      font-weight: 600;
    }

    /* 板块10：适用人群画像卡 */
    .persona-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .persona-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }

    .persona-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .persona-subtitle {
      font-size: 14px;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 14px;
    }

    .persona-list {
      list-style: none;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .persona-list li {
      position: relative;
      padding-left: 20px;
      margin-bottom: 8px;
    }

    .persona-list li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--accent-teal);
      font-weight: 700;
    }

    .persona-action {
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    /* 板块11：平台保障图标条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .guarantee-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-card);
    }

    .guarantee-num {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background-color: #EFF6FF;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      flex-shrink: 0;
    }

    .guarantee-item h4 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 6px;
      font-weight: 700;
    }

    .guarantee-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块12：订阅与行动转化区（全页唯一定向收口） */
    .cta-subscribe-box {
      background: linear-gradient(135deg, #1E40AF 0%, #172554 100%);
      border-radius: var(--radius-lg);
      padding: clamp(36px, 6vw, 64px);
      color: #FFFFFF;
      box-shadow: var(--shadow-hover);
    }

    .cta-inner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .cta-info h2 {
      font-size: clamp(26px, 3vw, 36px);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      color: #FFFFFF;
    }

    .cta-info p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .cta-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .cta-badge-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      color: #E2E8F0;
    }

    .cta-form-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--text-main);
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      height: 44px;
      padding: 8px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      background-color: #F8FAFC;
    }

    .form-control:focus {
      border-color: var(--primary);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }

    .form-btn-submit {
      width: 100%;
      height: 46px;
      background-color: var(--primary);
      color: #FFFFFF;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
      margin-top: 8px;
    }

    .form-btn-submit:hover {
      background-color: var(--primary-hover);
    }

    .form-tip {
      font-size: 12px;
      color: var(--text-muted);
      text-align: center;
      margin-top: 10px;
    }

    /* 页脚组件 */
    .site-footer {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 64px;
      padding-bottom: 32px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-brand p {
      line-height: 1.8;
      margin-bottom: 16px;
      font-size: 14px;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    /* 移动端与响应式适配 */
    @media (max-width: 1024px) {
      .calendar-matrix {
        grid-template-columns: repeat(2, 1fr);
      }
      .topics-grid,
      .media-card-grid,
      .audit-grid,
      .persona-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-visual img {
        height: 240px;
      }
      .viewpoint-wrapper {
        grid-template-columns: 1fr;
      }
      .news-row {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .news-row-img {
        height: 180px;
      }
      .topics-grid,
      .calendar-matrix,
      .media-card-grid,
      .audit-grid,
      .persona-grid,
      .guarantee-bar,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-inner-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }