/* roulang page: index */
:root {
      --primary: #00D26A;
      --primary-hover: #00B359;
      --primary-dark: #0A0E14;
      --secondary: #1E6091;
      --accent-orange: #FF6B35;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B1118;
      --bg-dark-card: #131C26;
      --text-main: #0F172A;
      --text-sub: #475569;
      --text-muted: #94A3B8;
      --border-light: #E2E8F0;
      --border-dark: #1E293B;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
      --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    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: 0 24px;
    }

    .section-padding {
      padding: 96px 0;
    }

    .section-padding-sm {
      padding: 64px 0;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: var(--bg-dark);
      color: var(--text-muted);
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
    }
    .top-bar-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-bar-links {
      display: flex;
      gap: 20px;
    }
    .top-bar-links a:hover {
      color: #FFF;
    }

    .main-nav {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      transition: all 0.3s;
    }
    .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: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--primary);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-sub);
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--primary-hover);
    }
    .btn-nav-cta {
      background-color: var(--primary-dark);
      color: #FFF;
      padding: 10px 22px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1px solid transparent;
    }
    .btn-nav-cta:hover {
      background-color: var(--primary);
      color: var(--primary-dark);
      border-color: var(--primary);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: none;
      text-decoration: none;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #0A0E14;
      font-weight: 700;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(0, 210, 106, 0.35);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background-color: #FFF;
      color: var(--text-main);
      border: 1px solid var(--border-light);
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .btn-dark {
      background-color: var(--primary-dark);
      color: #FFF;
    }
    .btn-dark:hover {
      background-color: #1E293B;
      color: #FFF;
    }

    /* 标题统一样式 */
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 56px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--secondary);
      background-color: rgba(30, 96, 145, 0.08);
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* 板块 1: Hero（对比选型，推荐档高亮卡片前置） */
    .hero-section {
      background-image: linear-gradient(to bottom, rgba(255,255,255,0.92), rgba(248,250,252,0.96)), url('/assets/images/259de0e7468851ae.webp');
      background-size: cover;
      background-position: center;
      padding: 80px 0 100px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .hero-main-title {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.18;
      color: var(--text-main);
      text-align: center;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-sub);
      text-align: center;
      max-width: 880px;
      margin: 0 auto 50px auto;
      line-height: 1.75;
    }
    .hero-selection-grid {
      display: grid;
      grid-template-columns: 1fr 1.15fr 1fr;
      gap: 24px;
      align-items: center;
      max-width: 1140px;
      margin: 0 auto;
    }
    .plan-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 36px 28px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: all 0.3s ease;
    }
    .plan-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .plan-card.featured {
      background: var(--bg-dark);
      color: #FFF;
      border: 2px solid var(--primary);
      box-shadow: 0 20px 40px -10px rgba(0, 210, 106, 0.2);
      transform: scale(1.04);
      z-index: 2;
    }
    .plan-card.featured .plan-title {
      color: #FFF;
    }
    .plan-card.featured .plan-price {
      color: var(--primary);
    }
    .plan-card.featured .plan-desc {
      color: var(--text-muted);
    }
    .plan-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #0A0E14;
      font-size: 12px;
      font-weight: 800;
      padding: 4px 16px;
      border-radius: 999px;
      letter-spacing: 0.5px;
    }
    .plan-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .plan-price {
      font-size: 32px;
      font-weight: 800;
      color: var(--secondary);
      margin-bottom: 12px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .plan-price span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
    }
    .plan-card.featured .plan-price span {
      color: var(--text-muted);
    }
    .plan-desc {
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 24px;
      line-height: 1.6;
    }
    .plan-features {
      list-style: none;
      margin-bottom: 30px;
    }
    .plan-features li {
      font-size: 14px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .plan-features li svg {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
      fill: var(--primary);
    }

    /* 板块 2: 产品价值 */
    .value-section {
      background-color: #FFFFFF;
    }
    .value-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .value-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
    }
    .value-metric-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 32px;
    }
    .metric-card {
      background: var(--bg-light);
      padding: 20px;
      border-radius: var(--radius-sm);
      border-left: 4px solid var(--secondary);
    }
    .metric-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 板块 3: 功能展示六宫格 */
    .features-section {
      background-color: var(--bg-light);
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      padding: 32px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      transition: all 0.3s ease;
    }
    .feature-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-icon-wrapper {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(0, 210, 106, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .feature-icon-wrapper svg {
      width: 26px;
      height: 26px;
      fill: var(--primary);
    }
    .feature-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-text {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 板块 4: 三步上手 */
    .steps-section {
      background-color: #FFFFFF;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      position: relative;
    }
    .step-card {
      background: var(--bg-light);
      padding: 36px 28px;
      border-radius: var(--radius-md);
      border-top: 4px solid var(--primary);
      position: relative;
    }
    .step-order {
      font-size: 38px;
      font-weight: 900;
      color: rgba(30, 96, 145, 0.15);
      position: absolute;
      top: 16px;
      right: 20px;
    }
    .step-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* 板块 5: 沉浸式深色云端架构与数据吞吐 */
    .dark-flow-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      background-image: radial-gradient(circle at 10% 20%, rgba(30, 96, 145, 0.2) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(0, 210, 106, 0.15) 0%, transparent 40%);
    }
    .dark-flow-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .dark-flow-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      padding: 28px;
      border-radius: var(--radius-md);
      margin-bottom: 16px;
    }
    .dark-flow-card h4 {
      color: var(--primary);
      font-size: 17px;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .dark-flow-card p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
    }

    /* 板块 6: 场景演示 */
    .scenarios-section {
      background-color: #FFFFFF;
    }
    .scenario-tabs-content {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .scenario-box {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #FFFFFF;
      transition: all 0.3s;
    }
    .scenario-box:hover {
      box-shadow: var(--shadow-md);
      border-color: #CBD5E1;
    }
    .scenario-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .scenario-body {
      padding: 24px;
    }
    .scenario-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-orange);
      margin-bottom: 8px;
      display: inline-block;
    }
    .scenario-name {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .scenario-detail {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 板块 7: 多端入口 */
    .multi-device-section {
      background-color: var(--bg-light);
    }
    .device-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .device-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
    }
    .device-icon-box {
      width: 64px;
      height: 64px;
      margin: 0 auto 20px auto;
      background: rgba(30, 96, 145, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .device-icon-box svg {
      width: 32px;
      height: 32px;
      fill: var(--secondary);
    }
    .device-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .device-desc {
      font-size: 14px;
      color: var(--text-sub);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .device-tags {
      display: flex;
      justify-content: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .device-tag-item {
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 4px;
      background: var(--bg-light);
      color: var(--text-sub);
      border: 1px solid var(--border-light);
    }

    /* 板块 8: 评价墙 (社会认同) */
    .reviews-section {
      background-color: #FFFFFF;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: var(--bg-light);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #EAB308;
      margin-bottom: 14px;
      display: flex;
      gap: 4px;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 24px;
      font-style: italic;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #CBD5E1;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-meta h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 9: 系统要求与前后对比 */
    .comparison-section {
      background-color: var(--bg-light);
    }
    .comparison-table-wrapper {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .comp-row {
      display: grid;
      grid-template-columns: 1.5fr 2fr 2fr;
      padding: 20px 28px;
      border-bottom: 1px solid var(--border-light);
      align-items: center;
    }
    .comp-row:last-child {
      border-bottom: none;
    }
    .comp-header {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
      font-size: 15px;
    }
    .comp-item-title {
      font-weight: 600;
      color: var(--text-main);
      font-size: 14px;
    }
    .comp-traditional {
      color: #64748B;
      font-size: 14px;
    }
    .comp-cloud {
      color: var(--primary-dark);
      font-weight: 600;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .comp-cloud svg {
      width: 16px;
      height: 16px;
      fill: var(--primary);
    }

    /* 板块 10: 技术资讯与动态 */
    .news-section {
      background-color: #FFFFFF;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
      justify-content: space-between;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--secondary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 11: 异议拆解 FAQ */
    .faq-section {
      background-color: var(--bg-light);
    }
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-question svg {
      width: 18px;
      height: 18px;
      transition: transform 0.3s ease;
      fill: var(--text-sub);
    }
    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* 板块 12: 底部强行动号召区 */
    .cta-banner-section {
      background: linear-gradient(135deg, #0A0E14 0%, #131C26 100%);
      color: #FFF;
      position: relative;
      overflow: hidden;
    }
    .cta-banner-box {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .cta-banner-title {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFF;
    }
    .cta-banner-desc {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 540px;
      margin: 0 auto;
    }
    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-dark);
      background: #0B1118;
      color: #FFF;
      font-size: 15px;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--primary);
    }

    /* 底部固定转化条 */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 20, 0.95);
      backdrop-filter: blur(10px);
      border-top: 1px solid var(--border-dark);
      padding: 12px 0;
      z-index: 990;
      box-shadow: 0 -10px 25px rgba(0,0,0,0.2);
    }
    .sticky-bar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .sticky-bar-text {
      color: #FFF;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .sticky-bar-text strong {
      color: var(--primary);
    }

    /* 页脚 Footer */
    .site-footer {
      background-color: var(--bg-dark);
      color: var(--text-muted);
      padding: 80px 0 30px 0;
      border-top: 1px solid var(--border-dark);
      margin-bottom: 50px; /* 给固定条留出空间 */
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 60px;
    }
    .footer-brand {
      font-size: 18px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-brand svg {
      width: 24px;
      height: 24px;
      fill: var(--primary);
    }
    .footer-info {
      font-size: 13px;
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding-top: 24px;
      text-align: center;
      font-size: 12px;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-selection-grid,
      .feature-grid,
      .steps-grid,
      .scenario-tabs-content,
      .device-grid,
      .reviews-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .plan-card.featured {
        transform: none;
      }
      .value-grid,
      .dark-flow-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .hero-main-title {
        font-size: 32px;
      }
      .hero-selection-grid,
      .feature-grid,
      .steps-grid,
      .scenario-tabs-content,
      .device-grid,
      .reviews-grid,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .comp-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .sticky-bar-text {
        font-size: 12px;
      }
    }