/* roulang page: index */
:root {
      --primary: #6D28D9;
      --primary-hover: #5B21B6;
      --primary-gradient: linear-gradient(135deg, #6D28D9 0%, #F97316 100%);
      --accent-orange: #F97316;
      --accent-emerald: #10B981;
      --dark-surface: #0F172A;
      --dark-card: #1E1B4B;
      --light-bg: #F8FAFC;
      --light-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --radius-lg: 22px;
      --radius-pill: 9999px;
      --shadow-base: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
      --shadow-hover: 0 20px 30px -10px rgba(109, 40, 217, 0.18);
      --transition-fast: all 0.3s 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, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.6;
      margin: 0;
      padding: 0;
    }

    a { color: inherit; text-decoration: none; transition: var(--transition-fast); }
    a:hover { color: var(--primary); }
    img { max-width: 100%; height: auto; display: block; }
    ul { list-style: none; margin: 0; padding: 0; }

    /* Top Utility Bar */
    .top-utility-bar {
      background-color: #0B0F19;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .status-pulse {
      width: 8px;
      height: 8px;
      background-color: var(--accent-emerald);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-emerald);
    }
    .utility-links {
      display: flex;
      gap: 20px;
    }
    .utility-links a { color: #94A3B8; }
    .utility-links a:hover { color: #FFFFFF; }

    /* Main Navigation Bar */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition-fast);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 16px 0;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: #0F172A;
      letter-spacing: -0.5px;
    }
    .brand-logo-badge {
      background: var(--primary-gradient);
      color: #FFFFFF;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: 0 4px 12px rgba(109, 40, 217, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      font-size: 15px;
      font-weight: 600;
    }
    .nav-item {
      position: relative;
      padding: 8px 0;
    }
    .nav-item > a {
      color: #334155;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .nav-item > a:hover {
      color: var(--primary);
    }
    .dropdown-panel {
      position: absolute;
      top: 100%;
      left: 0;
      background: #FFFFFF;
      min-width: 260px;
      padding: 16px;
      border-radius: 16px;
      box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
      border: 1px solid var(--border-color);
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: var(--transition-fast);
      z-index: 100;
    }
    .nav-item:hover .dropdown-panel {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .dropdown-item {
      display: flex;
      flex-direction: column;
      padding: 10px 12px;
      border-radius: 10px;
      transition: var(--transition-fast);
    }
    .dropdown-item:hover {
      background-color: var(--light-bg);
    }
    .dropdown-item-title {
      font-size: 14px;
      font-weight: 700;
      color: #0F172A;
    }
    .dropdown-item-desc {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    .btn-gradient {
      background: var(--primary-gradient);
      color: #FFFFFF !important;
      padding: 12px 26px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      box-shadow: 0 4px 18px rgba(109, 40, 217, 0.35);
      border: none;
      cursor: pointer;
      transition: var(--transition-fast);
    }
    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
    }
    .btn-ghost {
      border: 2px solid var(--border-color);
      color: #334155;
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 15px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition-fast);
    }
    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(109, 40, 217, 0.04);
    }

    /* Section Commonalities */
    section {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--light-bg);
      border-top: 1px solid #EEF2F6;
      border-bottom: 1px solid #EEF2F6;
    }
    .section-dark {
      background-color: var(--dark-surface);
      color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px auto;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(109, 40, 217, 0.1);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-tag-dark {
      background: rgba(249, 115, 22, 0.15);
      color: var(--accent-orange);
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: inherit;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-subtitle {
      color: var(--text-light);
    }

    /* Data Badges */
    .data-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 700;
      border-radius: var(--radius-pill);
      background: rgba(109, 40, 217, 0.08);
      color: var(--primary);
      border: 1px solid rgba(109, 40, 217, 0.2);
    }
    .badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: currentColor;
    }
    .badge-orange {
      background: rgba(249, 115, 22, 0.1);
      color: var(--accent-orange);
      border-color: rgba(249, 115, 22, 0.25);
    }
    .badge-green {
      background: rgba(16, 185, 129, 0.1);
      color: var(--accent-emerald);
      border-color: rgba(16, 185, 129, 0.25);
    }

    /* Card Micro-architecture */
    .card-large {
      background: var(--light-card);
      border-radius: var(--radius-lg);
      padding: 34px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      transition: var(--transition-fast);
      position: relative;
      height: 100%;
    }
    .card-large:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(109, 40, 217, 0.3);
    }

    /* 板块一：Hero Section (左文右图 5:7 错位) */
    .hero-section {
      padding: 90px 0 110px 0;
      background: linear-gradient(175deg, #FFFFFF 0%, #F5F3FF 50%, #FFF7ED 100%);
      overflow: hidden;
      position: relative;
    }
    .hero-grid {
      display: flex;
      align-items: center;
    }
    .hero-text-col {
      padding-right: 30px;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: #0F172A;
      margin-bottom: 22px;
      letter-spacing: -1px;
    }
    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 16px;
      color: #475569;
      line-height: 1.75;
      margin-bottom: 30px;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .hero-kpi-bar {
      display: flex;
      gap: 28px;
      padding-top: 20px;
      border-top: 1px solid rgba(226, 232, 240, 0.8);
    }
    .kpi-unit-title {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }
    .kpi-unit-value {
      font-size: 22px;
      font-weight: 800;
      color: #0F172A;
    }
    .hero-media-col {
      position: relative;
    }
    .hero-media-wrapper {
      position: relative;
      border-radius: 28px;
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(109, 40, 217, 0.25);
      border: 4px solid #FFFFFF;
      transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
      transition: var(--transition-fast);
    }
    .hero-media-wrapper:hover {
      transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
    }
    .hero-floating-badge {
      position: absolute;
      bottom: 24px;
      left: 24px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      padding: 12px 20px;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* 板块二：数据指标看板 */
    .metrics-dashboard-wrap {
      margin-top: -50px;
      position: relative;
      z-index: 20;
    }
    .metric-card-inner {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.08);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .metric-num {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin: 12px 0 6px 0;
      font-family: Arial, Helvetica, sans-serif;
    }
    .metric-sub {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }
    .metric-progress-line {
      height: 4px;
      width: 100%;
      background: #F1F5F9;
      border-radius: 2px;
      margin-top: 14px;
      overflow: hidden;
    }
    .metric-progress-fill {
      height: 100%;
      background: var(--primary-gradient);
    }

    /* 板块三：架构与产线能力 */
    .arch-feature-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }
    .arch-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .arch-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: rgba(109, 40, 217, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }

    /* 板块四：服务矩阵 */
    .service-grid-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      transition: var(--transition-fast);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .service-grid-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(109, 40, 217, 0.35);
    }
    .service-icon-box {
      width: 54px;
      height: 54px;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(109, 40, 217, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }

    /* 板块五：产品矩阵与参数表 */
    .product-tier-card {
      background: #FFFFFF;
      border-radius: 24px;
      padding: 36px 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .product-tier-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 20px 40px rgba(109, 40, 217, 0.15);
    }
    .featured-ribbon {
      position: absolute;
      top: -14px;
      right: 28px;
      background: var(--primary-gradient);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      letter-spacing: 0.5px;
    }
    .param-list {
      margin: 24px 0 32px 0;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .param-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 14px;
      padding-bottom: 8px;
      border-bottom: 1px dashed var(--border-color);
    }
    .param-label { color: var(--text-muted); }
    .param-val { font-weight: 700; color: #0F172A; }

    /* 板块六：深色沉浸式设计理念 */
    .code-console-card {
      background: #0B0F19;
      border-radius: 18px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px;
      font-family: Consolas, Monaco, "Courier New", monospace;
      font-size: 13px;
      line-height: 1.6;
      color: #38BDF8;
      box-shadow: inset 0 2px 8px rgba(0,0,0,0.5);
    }
    .code-line-dim { color: #64748B; }
    .code-line-hl { color: #F43F5E; }
    .code-line-kw { color: #A855F7; }

    /* 板块七：里程碑时间线 */
    .milestone-timeline {
      position: relative;
      padding: 20px 0;
    }
    .milestone-timeline::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 3px;
      background: linear-gradient(180deg, var(--primary) 0%, var(--accent-orange) 100%);
      transform: translateX(-50%);
    }
    .timeline-node {
      display: flex;
      justify-content: flex-end;
      padding-right: 40px;
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }
    .timeline-node:nth-child(even) {
      align-self: flex-end;
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 40px;
      margin-left: 50%;
    }
    .timeline-dot {
      position: absolute;
      top: 18px;
      right: -8px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 4px solid var(--primary);
      z-index: 2;
    }
    .timeline-node:nth-child(even) .timeline-dot {
      right: auto;
      left: -8px;
      border-color: var(--accent-orange);
    }
    .timeline-card {
      background: #FFFFFF;
      border-radius: 18px;
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      max-width: 480px;
      width: 100%;
    }

    /* 板块八：业务结果对比 */
    .benchmark-col-card {
      border-radius: var(--radius-lg);
      padding: 34px;
      height: 100%;
    }
    .benchmark-col-legacy {
      background: #F8FAFC;
      border: 1px solid #E2E8F0;
    }
    .benchmark-col-modern {
      background: linear-gradient(145deg, #1E1B4B 0%, #0F172A 100%);
      color: #FFFFFF;
      border: 1px solid rgba(109, 40, 217, 0.4);
      box-shadow: 0 20px 35px rgba(109, 40, 217, 0.2);
    }
    .bar-stat-group {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .bar-stat-item {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .bar-stat-label-wrap {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      font-weight: 600;
    }
    .bar-stat-track {
      height: 10px;
      background: rgba(0, 0, 0, 0.06);
      border-radius: 5px;
      overflow: hidden;
    }
    .benchmark-col-modern .bar-stat-track {
      background: rgba(255, 255, 255, 0.12);
    }
    .bar-stat-progress {
      height: 100%;
      border-radius: 5px;
    }

    /* 板块九：交付流程 */
    .flow-step-box {
      background: #FFFFFF;
      border-radius: 20px;
      padding: 30px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      position: relative;
      height: 100%;
    }
    .flow-number-label {
      font-size: 32px;
      font-weight: 900;
      color: rgba(109, 40, 217, 0.15);
      position: absolute;
      top: 20px;
      right: 24px;
      line-height: 1;
    }

    /* 板块十：平台信任与多维度合规 */
    .trust-badge-card {
      background: #FFFFFF;
      border-radius: 18px;
      padding: 24px 20px;
      border: 1px solid var(--border-color);
      text-align: center;
      transition: var(--transition-fast);
      height: 100%;
    }
    .trust-badge-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .trust-icon-ring {
      width: 50px;
      height: 50px;
      margin: 0 auto 16px auto;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.1);
      color: var(--accent-emerald);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }

    /* 板块十一：技术资讯 */
    .news-article-card {
      background: #FFFFFF;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-base);
      display: flex;
      flex-direction: column;
      height: 100%;
      transition: var(--transition-fast);
    }
    .news-article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .news-thumb-wrapper {
      height: 190px;
      position: relative;
      overflow: hidden;
    }
    .news-thumb-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .news-article-card:hover .news-thumb-wrapper img {
      transform: scale(1.05);
    }
    .news-content-box {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
      justify-content: space-between;
    }

    /* 板块十二：FAQ 手风琴 */
    .faq-accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition-fast);
    }
    .faq-accordion-item.active {
      border-color: var(--primary);
      box-shadow: 0 10px 25px -5px rgba(109, 40, 217, 0.1);
    }
    .faq-title-trigger {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 700;
      color: #0F172A;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer-panel {
      padding: 0 28px 24px 28px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    /* 板块十三：意向表单与终极 CTA */
    .conversion-banner-wrap {
      background: linear-gradient(135deg, #1E1B4B 0%, #0F172A 60%, #31104B 100%);
      border-radius: 28px;
      padding: 60px 48px;
      color: #FFFFFF;
      box-shadow: 0 30px 60px -12px rgba(15, 23, 42, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .form-dark-control {
      background: rgba(255, 255, 255, 0.08) !important;
      border: 1px solid rgba(255, 255, 255, 0.2) !important;
      color: #FFFFFF !important;
      border-radius: 12px !important;
      padding: 12px 16px !important;
      height: 48px !important;
      font-size: 14px !important;
      margin-bottom: 16px !important;
    }
    .form-dark-control:focus {
      border-color: var(--accent-orange) !important;
      background: rgba(255, 255, 255, 0.12) !important;
      box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.3) !important;
    }
    select.form-dark-control option {
      background-color: #0F172A;
      color: #FFFFFF;
    }

    /* 页脚系统 */
    .main-footer {
      background: #0B0F19;
      color: #94A3B8;
      padding: 70px 0 30px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 14px;
    }
    .footer-brand-title {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-col-title {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
    }
    .footer-links-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: #94A3B8;
    }
    .footer-links-list a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }
    .footer-bottom-bar {
      margin-top: 50px;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    /* 移动端与自适应响应式 */
    @media (max-width: 1024px) {
      .nav-menu { display: none; }
      .milestone-timeline::before { left: 20px; }
      .timeline-node { width: 100%; padding-left: 50px; padding-right: 0; justify-content: flex-start; }
      .timeline-node:nth-child(even) { width: 100%; margin-left: 0; padding-left: 50px; }
      .timeline-dot { left: 12px; right: auto; }
      .timeline-node:nth-child(even) .timeline-dot { left: 12px; }
    }
    @media (max-width: 768px) {
      section { padding: 60px 0; }
      .hero-section { padding: 50px 0 70px 0; }
      .hero-h1 { font-size: 30px; }
      .section-title { font-size: 26px; }
      .metric-num { font-size: 32px; }
      .conversion-banner-wrap { padding: 36px 20px; }
      .hero-media-wrapper { transform: none; margin-top: 30px; }
      .hero-floating-badge { position: static; margin-top: 15px; }
      .top-utility-bar { display: none; }
    }
    @media (max-width: 375px) {
      body { overflow-x: hidden; }
      .hero-h1 { font-size: 26px; }
      .btn-gradient, .btn-ghost { width: 100%; }
    }