/* roulang page: index */
:root {
      --primary: #3B28CC;
      --primary-dark: #271A8F;
      --accent: #00E5A3;
      --accent-hover: #00C88E;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.9);
      --dark-surface: #0F172A;
      --dark-card: #1E293B;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 14px;
      --shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -4px rgba(59, 40, 204, 0.08);
      --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.12);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.3;
      margin-top: 0;
    }
    a { color: var(--primary); text-decoration: none; transition: all 0.25s ease; }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; }

    /* 顶部频道 Tabs 双层导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 16px rgba(15, 23, 42, 0.06);
      border-bottom: 1px solid var(--border-color);
    }
    .header-top {
      padding: 0.75rem 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    }
    .header-logo {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
    }
    .header-logo i {
      color: var(--accent);
      background: var(--primary);
      padding: 8px;
      border-radius: var(--radius-sm);
      font-size: 1.1rem;
    }
    .top-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 1.25rem;
    }
    .phone-contact {
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .phone-contact i { color: var(--primary); }
    .btn-top-cta {
      background: var(--primary);
      color: #fff !important;
      padding: 0.5rem 1.25rem;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 50px;
      box-shadow: 0 4px 12px rgba(59, 40, 204, 0.25);
    }
    .btn-top-cta:hover { background: var(--primary-dark); }
    
    .nav-tabs-bar {
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
      padding: 0.5rem 0;
    }
    .nav-tabs-bar::-webkit-scrollbar { display: none; }
    .nav-pills-list {
      display: inline-flex;
      gap: 0.5rem;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .nav-pill-item a {
      display: inline-block;
      padding: 0.35rem 0.95rem;
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 50px;
      transition: all 0.2s ease;
      background: transparent;
    }
    .nav-pill-item a:hover,
    .nav-pill-item.active a {
      color: var(--primary);
      background: rgba(59, 40, 204, 0.08);
      font-weight: 600;
    }

    /* 通用板块标准 */
    .section-padding {
      padding: 5rem 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-alt {
      background: #FFFFFF;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.3rem 0.85rem;
      background: rgba(59, 40, 204, 0.08);
      color: var(--primary);
      font-size: 0.82rem;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 760px;
      margin-bottom: 3rem;
      line-height: 1.8;
    }
    .center-text { text-align: center; }
    .center-text .section-desc { margin-left: auto; margin-right: auto; }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      font-size: 0.95rem;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      border: none;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff !important;
      box-shadow: 0 4px 16px rgba(59, 40, 204, 0.3);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: #0F172A !important;
      font-weight: 700;
      box-shadow: 0 4px 16px rgba(0, 229, 163, 0.35);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
    }
    .btn-outline-white {
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #fff !important;
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-outline-white:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: #fff;
    }

    /* 1. Hero 沉浸大图与限时倒计时条 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(39, 26, 143, 0.88) 100%),
                  url('/assets/images/4b3b0d6379c1c506.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 6.5rem 0 5.5rem;
      overflow: hidden;
    }
    .hero-countdown-strip {
      background: rgba(0, 229, 163, 0.12);
      border: 1px solid rgba(0, 229, 163, 0.35);
      border-radius: 50px;
      padding: 0.5rem 1.25rem;
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.88rem;
      color: #E2E8F0;
      margin-bottom: 1.5rem;
    }
    .hero-countdown-strip .badge-hot {
      background: var(--accent);
      color: #0F172A;
      font-weight: 700;
      padding: 0.2rem 0.6rem;
      border-radius: 50px;
      font-size: 0.75rem;
    }
    .hero-title {
      color: #FFFFFF;
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: linear-gradient(90deg, #00E5A3 0%, #38BDF8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.15rem;
      line-height: 1.85;
      color: #CBD5E1;
      max-width: 820px;
      margin-bottom: 2.25rem;
    }
    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2.5rem;
    }
    .hero-stats-row {
      display: flex;
      flex-wrap: wrap;
      gap: 2.5rem;
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
    }
    .hero-stat-item h4 {
      color: var(--accent);
      font-size: 1.85rem;
      font-weight: 800;
      margin-bottom: 0.2rem;
    }
    .hero-stat-item p {
      font-size: 0.85rem;
      color: #94A3B8;
      margin: 0;
    }

    /* 2. 全球边缘覆盖板块 */
    .edge-map-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 2.5rem;
      box-shadow: var(--shadow-sm);
    }
    .node-status-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .node-status-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 0.85rem 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    }
    .node-status-item:last-child { border-bottom: none; }
    .node-name { font-weight: 600; color: var(--text-main); display: flex; align-items: center; gap: 0.5rem; }
    .node-name span.indicator { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block; }
    .node-latency { font-weight: 700; color: var(--primary); }

    /* 3. 卖点三连 */
    .highlight-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 2.25rem 1.75rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }
    .highlight-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(59, 40, 204, 0.2);
    }
    .highlight-icon {
      width: 58px;
      height: 58px;
      border-radius: var(--radius-sm);
      background: rgba(59, 40, 204, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 1.25rem;
    }
    .highlight-card h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
    .highlight-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 1.25rem; }
    .highlight-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(59, 40, 204, 0.06);
      padding: 0.25rem 0.65rem;
      border-radius: 4px;
    }

    /* 4. 底座架构双列 */
    .arch-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .arch-content { padding: 2.5rem; }
    .tech-metric-pill {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 1rem;
      background: var(--bg-light);
      border-radius: var(--radius-sm);
      margin-bottom: 0.75rem;
      border: 1px solid var(--border-color);
    }
    .tech-metric-pill span { font-weight: 600; font-size: 0.9rem; }
    .tech-metric-pill strong { color: var(--primary); font-size: 0.95rem; }

    /* 5. 优势 6 宫格 */
    .grid-adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.85rem;
      transition: all 0.25s ease;
      height: 100%;
    }
    .grid-adv-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .grid-adv-card i {
      font-size: 1.6rem;
      color: var(--primary);
      margin-bottom: 1rem;
      display: inline-block;
    }
    .grid-adv-card h4 { font-size: 1.15rem; margin-bottom: 0.6rem; }
    .grid-adv-card p { font-size: 0.88rem; color: var(--text-muted); margin: 0; line-height: 1.65; }

    /* 6. 场景方案 3 卡 */
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }
    .solution-thumb {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .solution-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .solution-card:hover .solution-thumb img { transform: scale(1.05); }
    .solution-body {
      padding: 1.75rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-body h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
    .solution-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 1.25rem; flex-grow: 1; }
    .solution-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
    .solution-tag {
      font-size: 0.75rem;
      background: rgba(59, 40, 204, 0.06);
      color: var(--primary);
      padding: 0.2rem 0.55rem;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 7. 深色沉浸式案例 */
    .dark-case-section {
      background: var(--dark-surface);
      color: #FFFFFF;
      padding: 5.5rem 0;
    }
    .dark-case-section h2, .dark-case-section h3 { color: #FFFFFF; }
    .dark-case-section .section-desc { color: #94A3B8; }
    .dark-card-box {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
    }
    .dark-stat-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.25rem;
      margin-top: 1.75rem;
    }
    .dark-stat-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.07);
      padding: 1.25rem;
      border-radius: var(--radius-md);
    }
    .dark-stat-item strong { display: block; font-size: 1.8rem; color: var(--accent); margin-bottom: 0.25rem; }
    .dark-stat-item span { font-size: 0.85rem; color: #94A3B8; }

    /* 8. 实证故事与流转 */
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
      box-shadow: var(--shadow-sm);
    }
    .comparison-table-wrap {
      margin-top: 1.5rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .comp-row {
      display: flex;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.88rem;
    }
    .comp-row:last-child { border-bottom: none; }
    .comp-col-label { width: 35%; background: var(--bg-light); padding: 0.75rem 1rem; font-weight: 600; color: var(--text-main); }
    .comp-col-val { width: 65%; padding: 0.75rem 1rem; color: var(--text-body); }

    /* 9. 指标条横幅 */
    .metrics-bar-section {
      background: linear-gradient(90deg, #3B28CC 0%, #271A8F 100%);
      color: #FFFFFF;
      padding: 3.5rem 0;
    }
    .metric-counter h3 {
      color: var(--accent);
      font-size: 2.5rem;
      font-weight: 900;
      margin-bottom: 0.35rem;
    }
    .metric-counter p {
      color: #E2E8F0;
      font-size: 0.95rem;
      margin: 0;
    }

    /* 10. 口碑评价 */
    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem 1.75rem;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .stars-bar { color: #F59E0B; margin-bottom: 1rem; font-size: 0.9rem; }
    .testimonial-text {
      font-size: 0.92rem;
      color: var(--text-body);
      font-style: italic;
      line-height: 1.75;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .user-info { display: flex; align-items: center; gap: 0.75rem; }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(59, 40, 204, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
    }
    .user-meta strong { display: block; font-size: 0.92rem; color: var(--text-main); }
    .user-meta span { font-size: 0.8rem; color: var(--text-muted); }

    /* 11. 资讯动态 */
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .insight-img { height: 160px; overflow: hidden; }
    .insight-img img { width: 100%; height: 100%; object-fit: cover; }
    .insight-body { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
    .insight-date { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; }
    .insight-body h4 { font-size: 1.1rem; margin-bottom: 0.65rem; }
    .insight-body p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 1rem; flex-grow: 1; }

    /* 12. FAQ 容器覆盖 */
    .accordion {
      background: transparent;
      border: none;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .accordion-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      padding: 1.25rem 1.5rem;
      border: none;
    }
    .accordion-title:hover { background: rgba(59, 40, 204, 0.03); color: var(--primary); }
    .accordion-title:before { font-size: 1.2rem; }
    .accordion-content {
      padding: 1.25rem 1.5rem;
      font-size: 0.92rem;
      line-height: 1.8;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
    }

    /* 13. 保障条 */
    .guarantee-item {
      text-align: center;
      padding: 1rem;
    }
    .guarantee-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 0.75rem;
    }
    .guarantee-item h4 { font-size: 1.05rem; margin-bottom: 0.35rem; }
    .guarantee-item p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

    /* 14. 转化表单 */
    .conversion-banner {
      background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 3.5rem 2.5rem;
      box-shadow: var(--shadow-lg);
    }
    .conversion-banner h2 { color: #FFFFFF; }
    .conversion-banner p { color: #CBD5E1; }
    .contact-form {
      display: grid;
      grid-template-columns: repeat(3, 1fr) auto;
      gap: 1rem;
      margin-top: 2rem;
    }
    .form-control {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      padding: 0.75rem 1rem;
      font-size: 0.92rem;
      width: 100%;
      height: 48px;
    }
    .form-control::placeholder { color: #94A3B8; }
    .form-control:focus {
      outline: none;
      border-color: var(--accent);
      background: rgba(255, 255, 255, 0.12);
    }
    .form-control option { background: #0F172A; color: #FFFFFF; }

    /* 页脚与底部固定转化条 */
    .site-footer {
      background: var(--dark-surface);
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .site-footer h5 {
      color: #FFFFFF;
      font-size: 1.05rem;
      margin-bottom: 1.25rem;
      font-weight: 700;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li { margin-bottom: 0.6rem; }
    .footer-links a { color: #94A3B8; }
    .footer-links a:hover { color: var(--accent); }
    .footer-bottom {
      margin-top: 3.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.85rem;
      text-align: center;
    }

    .fixed-action-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.96);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding: 0.75rem 1.5rem;
      z-index: 990;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.25);
    }
    .fixed-bar-info {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      color: #FFFFFF;
    }
    .fixed-bar-info strong { color: var(--accent); }

    @media print, screen and (max-width: 64em) {
      .contact-form { grid-template-columns: 1fr; }
      .hero-title { font-size: 2.3rem; }
    }
    @media screen and (max-width: 39.9375em) {
      .section-padding { padding: 3.5rem 0; }
      .hero-title { font-size: 1.85rem; }
      .hero-subtitle { font-size: 0.98rem; }
      .hero-stats-row { gap: 1.25rem; }
      .phone-contact { display: none; }
      .fixed-bar-info p { display: none; }
      .fixed-action-bar { justify-content: center; gap: 0.75rem; }
    }