/* roulang page: index */
:root {
      --bg-main: #0F1115;
      --bg-panel: #181B22;
      --bg-card: rgba(24, 27, 34, 0.75);
      --bg-contrast: #F5F7FA;
      --brand-primary: #6C5CE7;
      --brand-primary-rgb: 108, 92, 231;
      --brand-glow: #00D2D3;
      --brand-glow-rgb: 0, 210, 211;
      --text-title: #FFFFFF;
      --text-body: #A4B0BE;
      --text-muted: #747D8C;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(0, 210, 211, 0.6);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.45);
      --shadow-hover: 0 12px 28px -6px rgba(108, 92, 231, 0.35);
      --font-code: "JetBrains Mono", "Fira Code", monospace;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      background-color: var(--bg-main);
      color: var(--text-body);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.65;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    h1, h2, h3, h4, h5, h6 {
      color: var(--text-title);
      font-weight: 700;
      margin-top: 0;
      line-height: 1.3;
    }
    h1 { font-size: 2.5rem; letter-spacing: -0.5px; }
    h2 { font-size: 1.95rem; margin-bottom: 0.8rem; }
    h3 { font-size: 1.35rem; }
    a {
      color: var(--brand-glow);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover, a:focus { color: #55EFC4; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .site-container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 顶部双行导航 */
    .top-meta-bar {
      background: #090B0E;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-meta-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }
    .meta-code {
      font-family: var(--font-code);
      color: var(--brand-glow);
      background: rgba(0, 210, 211, 0.1);
      padding: 2px 8px;
      border-radius: 4px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      padding: 14px 0;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }
    .nav-panel {
      background: rgba(24, 27, 34, 0.85);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 10px 20px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.5);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
    }
    .nav-brand-tag {
      background: linear-gradient(135deg, var(--brand-primary), #8E44AD);
      color: #fff;
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      text-transform: uppercase;
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0;
      list-style: none;
    }
    .nav-pill {
      color: var(--text-body);
      font-size: 14px;
      padding: 6px 14px;
      border-radius: 20px;
      transition: all 0.2s ease;
      font-weight: 500;
    }
    .nav-pill:hover, .nav-pill.active {
      color: #FFF;
      background: rgba(108, 92, 231, 0.2);
      border: 1px solid rgba(108, 92, 231, 0.4);
    }
    .btn-glow {
      background: linear-gradient(135deg, var(--brand-primary) 0%, #4834DF 100%);
      color: #FFF !important;
      padding: 9px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.15);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
      transition: all 0.25s ease;
      cursor: pointer;
    }
    .btn-glow:hover {
      box-shadow: 0 6px 20px rgba(0, 210, 211, 0.45);
      border-color: var(--brand-glow);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      color: var(--text-title) !important;
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 9px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      transition: all 0.2s;
    }
    .btn-outline:hover {
      border-color: var(--brand-glow);
      color: var(--brand-glow) !important;
      background: rgba(0, 210, 211, 0.05);
    }

    /* 板块通用布局 */
    .app-section {
      padding: 85px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-panel);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-heading-wrap {
      margin-bottom: 50px;
    }
    .section-eyebrow {
      font-family: var(--font-code);
      font-size: 13px;
      color: var(--brand-glow);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-desc {
      color: var(--text-body);
      max-width: 760px;
      margin-top: 10px;
      font-size: 16px;
    }

    /* 模块化卡片系统 */
    .deck-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    }
    .deck-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0, 210, 211, 0.4);
      box-shadow: var(--shadow-hover);
    }

    /* 1. 首屏提问式获客 Hero */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(108, 92, 231, 0.18) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(0, 210, 211, 0.08) 0%, transparent 50%),
                  var(--bg-main);
      border-bottom: 1px solid var(--border-subtle);
    }
    .hero-pain-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(108, 92, 231, 0.15);
      border: 1px solid rgba(108, 92, 231, 0.4);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      color: #A29BFE;
      margin-bottom: 22px;
    }
    .hero-intro {
      font-size: 17px;
      color: #CED6E0;
      margin: 20px 0 30px;
      line-height: 1.75;
    }
    .hero-form-panel {
      background: rgba(24, 27, 34, 0.95);
      border: 1px solid rgba(108, 92, 231, 0.4);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: 0 20px 45px rgba(0,0,0,0.6);
      position: relative;
    }
    .form-ctrl {
      background: #0D0F12;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      color: #FFF;
      padding: 12px 14px;
      font-size: 14px;
      width: 100%;
      margin-bottom: 14px;
      transition: all 0.2s;
    }
    .form-ctrl:focus {
      outline: none;
      border-color: var(--brand-glow);
      background: #12151B;
      box-shadow: 0 0 0 2px rgba(0, 210, 211, 0.2);
    }

    /* 2. 技术规格参数表 */
    .specs-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--bg-panel);
    }
    .specs-table th, .specs-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 14px;
      text-align: left;
    }
    .specs-table th {
      background: rgba(255,255,255,0.02);
      color: var(--text-title);
      font-weight: 600;
      width: 32%;
    }
    .specs-table td {
      font-family: var(--font-code);
      color: var(--brand-glow);
    }
    .specs-table tr:last-child th, .specs-table tr:last-child td { border-bottom: none; }

    /* 3. 核心优势 6微型工作台卡片 */
    .icon-badge {
      width: 46px;
      height: 46px;
      border-radius: 8px;
      background: rgba(108, 92, 231, 0.15);
      border: 1px solid rgba(108, 92, 231, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-glow);
      font-size: 20px;
      margin-bottom: 18px;
      font-family: var(--font-code);
      font-weight: 700;
    }

    /* 4. 产品套件 3大尺寸卡片 */
    .suite-card {
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      background: var(--bg-card);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .suite-thumb {
      height: 190px;
      position: relative;
      overflow: hidden;
      background: #090B0E;
    }
    .suite-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .suite-card:hover .suite-thumb img {
      transform: scale(1.05);
    }
    .suite-content {
      padding: 26px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .suite-badge {
      font-size: 12px;
      background: rgba(0, 210, 211, 0.1);
      color: var(--brand-glow);
      padding: 3px 10px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 12px;
      font-family: var(--font-code);
    }
    .suite-list {
      list-style: none;
      margin: 16px 0 24px;
      padding: 0;
      flex-grow: 1;
    }
    .suite-list li {
      font-size: 14px;
      color: #95A5A6;
      margin-bottom: 8px;
      position: relative;
      padding-left: 18px;
    }
    .suite-list li::before {
      content: "▹";
      position: absolute;
      left: 0;
      color: var(--brand-primary);
    }

    /* 5. 架构理念深色区 */
    .dark-code-box {
      background: #07090C;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 22px;
      font-family: var(--font-code);
      font-size: 13px;
      color: #7bed9f;
      line-height: 1.8;
      box-shadow: inset 0 2px 10px rgba(0,0,0,0.8);
    }

    /* 6. 开发者故事 */
    .story-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 24px;
    }
    .story-img-col {
      min-height: 220px;
      background: #000;
    }
    .story-img-col img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-meta-row {
      display: flex;
      gap: 12px;
      font-size: 12px;
      color: var(--brand-glow);
      margin-bottom: 10px;
      font-family: var(--font-code);
    }

    /* 7. 指标仪表板 */
    .metric-strip {
      background: linear-gradient(90deg, #12141A 0%, #1A1E27 100%);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 40px 20px;
    }
    .metric-num {
      font-size: 3rem;
      font-weight: 800;
      color: var(--brand-glow);
      font-family: var(--font-code);
      line-height: 1;
      margin-bottom: 8px;
    }

    /* 8. 真实评价 */
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #2F3542;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 700;
      font-size: 16px;
    }

    /* 9. 动态日志 */
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-family: var(--font-code);
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    /* 10. FAQ 手风琴 */
    .faq-accordion-item {
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      background: var(--bg-panel);
      overflow: hidden;
    }
    .faq-trigger {
      padding: 18px 22px;
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      color: var(--text-title);
      font-size: 16px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-trigger:hover {
      color: var(--brand-glow);
    }
    .faq-body {
      padding: 0 22px 18px;
      font-size: 15px;
      color: var(--text-body);
      display: none;
    }
    .faq-accordion-item.open .faq-body {
      display: block;
    }
    .faq-icon {
      font-family: var(--font-code);
      font-size: 18px;
      transition: transform 0.2s;
    }
    .faq-accordion-item.open .faq-icon {
      transform: rotate(45deg);
    }

    /* 11. 交付保障 */
    .guarantee-box {
      border: 1px solid var(--border-subtle);
      padding: 20px;
      border-radius: var(--radius-sm);
      background: rgba(24, 27, 34, 0.4);
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .guarantee-symbol {
      color: var(--brand-glow);
      font-size: 22px;
    }

    /* 12. 终极转化卡片 */
    .final-cta-card {
      background: radial-gradient(circle at 50% 50%, rgba(108, 92, 231, 0.35) 0%, rgba(24, 27, 34, 0.9) 75%);
      border: 1px solid rgba(108, 92, 231, 0.5);
      border-radius: var(--radius-lg);
      padding: 60px 30px;
      text-align: center;
      box-shadow: 0 0 50px rgba(108, 92, 231, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background: #090B0E;
      border-top: 1px solid var(--border-subtle);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-col h4 {
      font-size: 15px;
      color: #FFF;
      margin-bottom: 18px;
      text-transform: uppercase;
      letter-spacing: 0.8px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-links a:hover {
      color: var(--brand-glow);
    }
    .footer-bottom {
      margin-top: 45px;
      padding-top: 25px;
      border-top: 1px solid rgba(255,255,255,0.05);
      text-align: center;
      font-size: 13px;
    }

    /* 响应式调整 */
    @media (max-width: 900px) {
      .nav-links { display: none; }
      h1 { font-size: 2rem; }
      h2 { font-size: 1.6rem; }
      .hero-section { padding: 40px 0 60px; }
      .app-section { padding: 60px 0; }
    }
    @media (max-width: 640px) {
      .specs-table th, .specs-table td { padding: 10px; font-size: 13px; }
      .btn-glow, .btn-outline { width: 100%; text-align: center; }
      .metric-num { font-size: 2.2rem; }
      .site-container { padding: 0 16px; }
    }