/* roulang page: index */
:root {
      --color-primary-dark: #4A154B;
      --color-primary-mid: #611f69;
      --color-primary: #851e5a;
      --color-primary-gradient: linear-gradient(135deg, #4A154B 0%, #611f69 50%, #E01E5A 100%);
      --color-accent-cyan: #00F2FE;
      --color-accent-orange: #FF6B4A;
      --color-bg-light: #F8FAFC;
      --color-bg-white: #FFFFFF;
      --color-dark-surface: #0F172A;
      --color-dark-card: #1E1B4B;
      --color-text-main: #0F172A;
      --color-text-muted: #64748B;
      --color-text-light: #94A3B8;
      --color-border: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-pill: 9999px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 15px -3px rgba(74, 21, 75, 0.08), 0 4px 6px -2px rgba(74, 21, 75, 0.04);
      --shadow-lg: 0 20px 25px -5px rgba(74, 21, 75, 0.1), 0 8px 10px -6px rgba(74, 21, 75, 0.05);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--color-bg-light);
      color: var(--color-text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部信息栏与导航 */
    .topbar {
      background-color: #111827;
      color: #9CA3AF;
      font-size: 13px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 8px 0;
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-links {
      display: flex;
      gap: 20px;
    }

    .navbar {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 999;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      border-bottom: 1px solid var(--color-border);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }
    .brand-logo {
      font-size: 20px;
      font-weight: 800;
      background: var(--color-primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-menu li a {
      font-size: 15px;
      font-weight: 600;
      color: #334155;
    }
    .nav-menu li a:hover {
      color: #E01E5A;
    }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      background: var(--color-primary-gradient);
      color: #FFF;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      box-shadow: 0 4px 12px rgba(224, 30, 90, 0.3);
    }
    .nav-cta-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(224, 30, 90, 0.45);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--color-text-main);
      cursor: pointer;
    }

    /* 按钮与徽章 */
    .badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 700;
      background: rgba(224, 30, 90, 0.1);
      color: #E01E5A;
      margin-bottom: 16px;
    }
    .badge-cyan {
      background: rgba(0, 242, 254, 0.12);
      color: #0284C7;
    }
    .badge-dark {
      background: rgba(255, 255, 255, 0.15);
      color: var(--color-accent-cyan);
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      background: var(--color-primary-gradient);
      color: #FFF;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 8px 18px rgba(97, 31, 105, 0.25);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      background: #FFF;
      color: #334155;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
    }
    .btn-secondary:hover {
      background: #F1F5F9;
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-header {
      margin-bottom: 52px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--color-text-muted);
      line-height: 1.75;
    }

    /* 1. Hero 蓝图变体：无大图首屏，图标矩阵 + 状态条 + 短标题 */
    #hero-metrics {
      background: radial-gradient(circle at top right, rgba(224, 30, 90, 0.08), transparent 40%),
                  radial-gradient(circle at bottom left, rgba(74, 21, 75, 0.06), transparent 50%),
                  #FFFFFF;
      padding: 60px 0 70px;
      border-bottom: 1px solid var(--color-border);
    }
    .hero-ticker-status {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: #F1F5F9;
      border: 1px solid #CBD5E1;
      padding: 6px 18px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-status-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
    .hero-main-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      max-width: 960px;
      letter-spacing: -1px;
    }
    .hero-main-title span {
      background: var(--color-primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro-text {
      font-size: 17px;
      color: var(--color-text-muted);
      line-height: 1.8;
      max-width: 860px;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-icon-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .matrix-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(224, 30, 90, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      color: #E01E5A;
      font-size: 20px;
      margin-bottom: 14px;
    }
    .matrix-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .matrix-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 2. KPI 看板区 */
    #interactive-intro {
      background-color: var(--color-bg-light);
    }
    .kpi-board-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .kpi-stat-card {
      background: #FFF;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .kpi-stat-num {
      font-size: 42px;
      font-weight: 900;
      color: #4A154B;
      line-height: 1;
      margin-bottom: 12px;
      font-family: monospace, sans-serif;
    }
    .kpi-stat-label {
      font-size: 16px;
      font-weight: 700;
      color: #1E293B;
      margin-bottom: 8px;
    }
    .kpi-stat-sub {
      font-size: 13px;
      color: var(--color-text-muted);
    }

    /* 3. 核心优势六矩阵 */
    #core-advantages {
      background-color: #FFFFFF;
    }
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .adv-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(224, 30, 90, 0.4);
    }
    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin: 12px 0 10px;
    }
    .adv-card p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* 4. 服务矩阵热门方案 */
    #service-matrix {
      background-color: #F8FAFC;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .service-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .service-body {
      padding: 28px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .service-body h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .service-body p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .service-metrics {
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px dashed var(--color-border);
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      font-weight: 600;
      color: #611f69;
    }

    /* 5. 深色对比案例与理念区 */
    #dark-case-philosophy {
      background: linear-gradient(180deg, var(--color-dark-surface) 0%, var(--color-dark-card) 100%);
      color: #FFFFFF;
    }
    #dark-case-philosophy .section-title {
      color: #FFFFFF;
    }
    #dark-case-philosophy .section-desc {
      color: #94A3B8;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .dark-media-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 30px rgba(0,0,0,0.5);
    }
    .dark-media-card img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .dark-content-box h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.4;
    }
    .dark-content-box p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .dark-param-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .dark-param-item {
      background: rgba(255, 255, 255, 0.05);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .dark-param-item .val {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-accent-cyan);
      margin-bottom: 4px;
    }
    .dark-param-item .label {
      font-size: 13px;
      color: #94A3B8;
    }

    /* 6. 行业结果对比分析区 */
    #result-comparison {
      background-color: #FFFFFF;
    }
    .comparison-table-card {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .comparison-head {
      display: grid;
      grid-template-columns: 1fr 1.5fr 1.5fr;
      background: #F1F5F9;
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      border-bottom: 1px solid var(--color-border);
    }
    .comparison-row {
      display: grid;
      grid-template-columns: 1fr 1.5fr 1.5fr;
      padding: 22px 24px;
      border-bottom: 1px solid #F1F5F9;
      align-items: center;
      font-size: 14px;
    }
    .comparison-row:last-child {
      border-bottom: none;
    }
    .comparison-dimension {
      font-weight: 700;
      color: #334155;
    }
    .comparison-traditional {
      color: #64748B;
      padding-right: 16px;
    }
    .comparison-our {
      color: #4A154B;
      font-weight: 600;
      padding-right: 16px;
    }

    /* 7. 交付里程碑路线图 */
    #delivery-milestones {
      background-color: #F8FAFC;
    }
    .milestone-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      position: relative;
    }
    .milestone-step {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--color-primary-gradient);
      color: #FFF;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 8. 关键数据统计条 */
    #stat-counter {
      background: var(--color-primary-gradient);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .stat-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-single h4 {
      font-size: 46px;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 10px;
      letter-spacing: -1px;
    }
    .stat-single p {
      font-size: 15px;
      opacity: 0.9;
    }

    /* 9. 用户故事与真实评价 */
    #testimonials-stories {
      background-color: #FFFFFF;
    }
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .story-card {
      background: #F8FAFC;
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      border: 1px solid var(--color-border);
      display: flex;
      flex-direction: column;
    }
    .story-quote {
      font-size: 14px;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .story-client-info {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .story-client-info .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #475569;
    }
    .client-name {
      font-size: 15px;
      font-weight: 700;
    }
    .client-title {
      font-size: 12px;
      color: var(--color-text-muted);
    }

    /* 10. 行业动态与深度资讯 */
    #industry-news {
      background-color: #F8FAFC;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }
    .news-card img {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
    }
    .news-date {
      font-size: 12px;
      color: var(--color-text-light);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
    }
    .news-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 11. 平台保障与合规承诺 */
    #security-assurance {
      background-color: #FFFFFF;
    }
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .assurance-item {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      background: #FFFFFF;
    }
    .assurance-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0F172A;
    }
    .assurance-item p {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 12. 快速解答与转化表单 */
    #marketing-faq {
      background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
    }
    .faq-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }
    .accordion-item {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: #FFFFFF;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-header {
      padding: 18px 20px;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .accordion-content {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
      display: none;
    }
    .accordion-item.active .accordion-content {
      display: block;
    }

    /* 转化表单卡片 */
    .cta-form-card {
      background: linear-gradient(135deg, #1E1B4B 0%, #0F172A 100%);
      color: #FFF;
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255,255,255,0.1);
    }
    .cta-form-card h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 10px;
    }
    .cta-form-card p {
      font-size: 14px;
      color: #94A3B8;
      margin-bottom: 24px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #E2E8F0;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      color: #FFF;
      font-size: 14px;
      outline: none;
    }
    .form-control:focus {
      border-color: var(--color-accent-cyan);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--color-primary-gradient);
      color: #FFF;
      border: none;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      margin-top: 10px;
      box-shadow: 0 4px 15px rgba(224, 30, 90, 0.4);
    }
    .form-privacy-tip {
      font-size: 12px;
      color: #64748B;
      text-align: center;
      margin-top: 14px;
    }

    /* 页脚 */
    .site-footer {
      background: #090D16;
      color: #94A3B8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255,255,255,0.08);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 18px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list li a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding-top: 30px;
      border-top: 1px solid rgba(255,255,255,0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-icon-matrix, .kpi-board-grid, .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .advantages-grid, .services-grid, .stories-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .milestone-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .stat-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-grid, .faq-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
      }
      .nav-menu.open {
        display: flex;
      }
      .hero-main-title {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .hero-icon-matrix, .kpi-board-grid, .advantages-grid, .services-grid, .milestone-timeline, .assurance-grid, .stories-grid, .news-grid, .stat-row, .footer-grid {
        grid-template-columns: 1fr;
      }
      .comparison-head, .comparison-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }