/* roulang page: index */
:root {
      --color-primary: #0D231E;
      --color-primary-dark: #0A1412;
      --color-accent: #10B981;
      --color-accent-light: #00E599;
      --color-text-main: #202E2B;
      --color-text-muted: #5D716C;
      --color-bg-light: #F4F7F6;
      --color-bg-white: #FFFFFF;
      --color-border: rgba(16, 185, 129, 0.16);
      --color-border-card: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-soft: 0 4px 20px -2px rgba(13, 35, 30, 0.05);
      --shadow-hover: 0 10px 25px -4px rgba(13, 35, 30, 0.12);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      color: var(--color-text-main);
      background-color: var(--color-bg-white);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    /* 顶部精简条 */
    .top-minimal-bar {
      background-color: var(--color-primary-dark);
      color: #8E9F9B;
      font-size: 13px;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-minimal-bar .flex-wrap-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 独立极简导航栏 (Logo + 单一主按钮) */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 14px 0;
      border-bottom: 1px solid rgba(13, 35, 30, 0.06);
    }
    .header-nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 22px;
      color: var(--color-primary);
      letter-spacing: -0.01em;
    }
    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: var(--color-accent);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
    }
    .btn-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      background: var(--color-accent);
      color: #FFFFFF;
      font-weight: 600;
      font-size: 15px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
      transition: all 0.25s ease;
    }
    .btn-cta:hover {
      background: #0ea372;
      color: #FFFFFF;
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
      transform: translateY(-1px);
    }

    /* 板块通用基础 */
    .site-section {
      padding: 80px 0;
      position: relative;
    }
    .site-section.bg-light {
      background-color: var(--color-bg-light);
    }
    .site-section.bg-dark {
      background-color: var(--color-primary-dark);
      color: #FFFFFF;
    }
    .site-section.bg-pitch {
      background-color: var(--color-primary);
      color: #FFFFFF;
    }
    .section-head {
      margin-bottom: 48px;
      max-width: 820px;
    }
    .section-head.text-center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--color-accent);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 10px;
      background: rgba(16, 185, 129, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
    }
    .section-head h2 {
      font-size: 2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: inherit;
    }
    .section-head p {
      font-size: 1.05rem;
      color: var(--color-text-muted);
      line-height: 1.75;
      margin-bottom: 0;
    }
    .site-section.bg-dark .section-head p,
    .site-section.bg-pitch .section-head p {
      color: #A0B2AD;
    }

    /* 板块 1: Hero（预约试用 / 权益徽章 / 资格说明） */
    .hero-banner {
      position: relative;
      background: linear-gradient(rgba(10, 20, 18, 0.86), rgba(10, 20, 18, 0.94)), url('/assets/images/5814f70f9c779fc8.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 100px 0 110px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .hero-h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.01em;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #D1DED9;
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 780px;
    }
    .hero-badge-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 34px;
    }
    .hero-badge-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 30px;
      padding: 6px 16px;
      font-size: 14px;
      color: #ECEFED;
    }
    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: var(--color-accent);
      border-radius: 50%;
    }
    .hero-qualification-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(16, 185, 129, 0.3);
      border-radius: var(--radius-md);
      padding: 24px 28px;
      margin-top: 30px;
      max-width: 820px;
    }
    .hero-qualification-panel h3 {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--color-accent-light);
      margin-bottom: 10px;
    }
    .hero-qualification-panel p {
      font-size: 0.95rem;
      color: #A3B5B0;
      margin-bottom: 0;
      line-height: 1.7;
    }
    .hero-action-row {
      display: flex;
      align-items: center;
      gap: 18px;
      flex-wrap: wrap;
    }

    /* 板块 2: 产品全景 */
    .panorama-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-soft);
    }
    .tech-metric-box {
      margin-top: 24px;
      padding: 16px 20px;
      background: var(--color-bg-light);
      border-left: 4px solid var(--color-accent);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      font-size: 14px;
      color: var(--color-text-muted);
    }
    .image-preview-frame {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      border: 1px solid rgba(0,0,0,0.06);
    }

    /* 板块 3: 核心优势矩阵 */
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      height: 100%;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }
    .matrix-card:hover {
      transform: translateY(-4px);
      border-color: var(--color-accent);
      box-shadow: var(--shadow-hover);
    }
    .matrix-icon-wrap {
      width: 48px;
      height: 48px;
      background: rgba(16, 185, 129, 0.12);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-accent);
      font-weight: 700;
      font-size: 20px;
      margin-bottom: 18px;
    }
    .matrix-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--color-primary);
    }
    .matrix-card p {
      font-size: 0.95rem;
      color: var(--color-text-muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* 板块 4: 热门模块与体系方案 */
    .tier-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      height: 100%;
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s ease;
    }
    .tier-card.featured {
      border: 2px solid var(--color-accent);
    }
    .tier-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .tier-badge {
      display: inline-block;
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--color-accent);
      margin-bottom: 16px;
    }
    .tier-card h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--color-primary);
    }
    .tier-card .tier-summary {
      font-size: 0.95rem;
      color: var(--color-text-muted);
      margin-bottom: 24px;
      min-height: 48px;
    }
    .tier-feature-list {
      list-style: none;
      margin: 0 0 28px 0;
      padding: 0;
      flex-grow: 1;
    }
    .tier-feature-list li {
      position: relative;
      padding-left: 22px;
      font-size: 0.95rem;
      color: var(--color-text-main);
      margin-bottom: 10px;
    }
    .tier-feature-list li::before {
      content: "✔";
      position: absolute;
      left: 0;
      color: var(--color-accent);
      font-weight: bold;
    }

    /* 板块 5: 战术理念与数字化架构 */
    .cycle-step-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      height: 100%;
      transition: all 0.25s ease;
    }
    .cycle-step-card:hover {
      background: rgba(255, 255, 255, 0.07);
      border-color: var(--color-accent);
    }
    .cycle-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--color-accent);
      margin-bottom: 10px;
      font-family: monospace;
    }
    .cycle-step-card h3 {
      font-size: 1.15rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 10px;
    }
    .cycle-step-card p {
      font-size: 0.9rem;
      color: #9EAFAB;
      margin-bottom: 0;
      line-height: 1.65;
    }

    /* 板块 6: 场景落地故事 */
    .story-block {
      margin-bottom: 60px;
    }
    .story-block:last-child {
      margin-bottom: 0;
    }
    .story-visual-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
    }
    .story-content {
      display: flex;
      flex-direction: column;
      justify-content: center;
      height: 100%;
      padding: 20px 0;
    }
    .story-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--color-primary);
    }
    .story-content p {
      font-size: 1rem;
      color: var(--color-text-muted);
      line-height: 1.8;
      margin-bottom: 16px;
    }

    /* 板块 7: KPI 指标条 */
    .kpi-strip-section {
      background: var(--color-primary);
      padding: 55px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .kpi-col {
      text-align: center;
      padding: 10px 15px;
    }
    .kpi-value {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--color-accent-light);
      line-height: 1.1;
      margin-bottom: 6px;
      font-family: monospace;
    }
    .kpi-label {
      font-size: 0.95rem;
      color: #C0D3CE;
      margin-bottom: 0;
    }

    /* 板块 8: 评价墙 */
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      height: 100%;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.98rem;
      color: var(--color-text-main);
      line-height: 1.75;
      margin-bottom: 24px;
      position: relative;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .author-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--color-bg-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--color-primary);
      font-size: 18px;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }
    .author-info h4 {
      font-size: 1rem;
      font-weight: 700;
      margin: 0;
      color: var(--color-primary);
    }
    .author-info span {
      font-size: 0.85rem;
      color: var(--color-text-muted);
    }

    /* 板块 9: 动态资讯卡 */
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .news-card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: var(--color-text-muted);
      margin-bottom: 12px;
    }
    .news-card-body h3 {
      font-size: 1.18rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--color-primary);
      line-height: 1.4;
    }
    .news-card-body p {
      font-size: 0.92rem;
      color: var(--color-text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link-btn {
      color: var(--color-accent);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块 10: 合作生态墙 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 20px;
    }
    .partner-item {
      background: #FFFFFF;
      border: 1px dashed var(--color-border-card);
      border-radius: var(--radius-sm);
      padding: 24px 16px;
      text-align: center;
      font-size: 14px;
      font-weight: 600;
      color: #6C7F7A;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 80px;
      transition: all 0.2s ease;
    }
    .partner-item:hover {
      border-color: var(--color-accent);
      color: var(--color-primary);
      background: #FAFCFB;
    }

    /* 板块 11: FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border-card);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-title {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--color-primary);
      background: #FFFFFF;
      user-select: none;
    }
    .faq-toggle-icon {
      font-size: 20px;
      color: var(--color-accent);
      font-weight: bold;
    }
    .faq-content {
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--color-text-muted);
      line-height: 1.75;
      display: none;
    }
    .faq-item.active .faq-content {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 板块 12: 数据安全与售后保障条 */
    .security-bar-section {
      background: var(--color-bg-light);
      border-top: 1px solid var(--color-border-card);
      border-bottom: 1px solid var(--color-border-card);
      padding: 48px 0;
    }
    .sec-feature-box {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }
    .sec-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: rgba(16, 185, 129, 0.15);
      color: var(--color-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }
    .sec-info h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--color-primary);
    }
    .sec-info p {
      font-size: 0.88rem;
      color: var(--color-text-muted);
      margin-bottom: 0;
      line-height: 1.55;
    }

    /* 板块 13: 咨询预约轻表单 CTA */
    .cta-consult-box {
      background: linear-gradient(135deg, var(--color-primary) 0%, #173830 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-hover);
    }
    .cta-form .form-control-input,
    .cta-form .form-control-select {
      width: 100%;
      height: 48px;
      background: #FFFFFF;
      border: 1px solid transparent;
      border-radius: var(--radius-sm);
      padding: 10px 16px;
      font-size: 15px;
      color: var(--color-text-main);
      margin-bottom: 16px;
    }
    .cta-form .form-control-input:focus,
    .cta-form .form-control-select:focus {
      outline: none;
      border-color: var(--color-accent);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }
    .btn-submit-cta {
      width: 100%;
      height: 48px;
      background: var(--color-accent);
      border: none;
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-submit-cta:hover {
      background: #0ea372;
    }

    /* 页脚统一规范 */
    .site-footer {
      background-color: var(--color-primary-dark);
      color: #8A9C98;
      padding: 60px 0 30px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand h3 {
      color: #FFFFFF;
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-links h4 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-links ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a:hover {
      color: var(--color-accent-light);
    }
    .footer-bottom-bar {
      margin-top: 50px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      text-align: center;
      font-size: 13px;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 2.3rem; }
      .site-section { padding: 60px 0; }
    }
    @media (max-width: 640px) {
      .hero-h1 { font-size: 1.85rem; }
      .hero-desc { font-size: 1rem; }
      .cta-consult-box { padding: 32px 20px; }
      .section-head h2 { font-size: 1.6rem; }
      .kpi-value { font-size: 2.2rem; }
      .top-minimal-bar { display: none; }
    }