/* roulang page: index */
:root {
      --primary-dark: #2C5F8A;
      --primary-deep: #1E3B4F;
      --accent-signal: #00A9A5;
      --accent-hover: #008F8C;
      --bg-warm: #F7F9FC;
      --bg-light-gray: #EDF2F7;
      --card-white: #FFFFFF;
      --text-main: #1E2B3C;
      --text-secondary: #5F6B7A;
      --text-muted: #8A95A5;
      --border-light: #E8ECF1;
      --border-input: #DCE3EA;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.03);
      --shadow-hover: 0 12px 28px rgba(0,0,0,0.08), 0 3px 8px rgba(0,0,0,0.05);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --transition-default: 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航品牌行 */
    .brand-bar {
      background: #fff;
      border-bottom: 1px solid var(--border-light);
      padding: 12px 0;
    }
    .brand-bar .inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: 1px;
      line-height: 1.2;
    }
    .logo-icon {
      font-size: 2rem;
      color: var(--accent-signal);
    }
    .brand-cta {
      background: var(--accent-signal);
      color: #fff;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      transition: background var(--transition-default), transform var(--transition-default);
      display: inline-block;
      white-space: nowrap;
    }
    .brand-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
      color: #fff;
    }

    /* 频道导航行 */
    .channel-nav {
      background: #F4F6F9;
      border-bottom: 1px solid var(--border-light);
      padding: 0;
      overflow-x: auto;
      white-space: nowrap;
      -webkit-overflow-scrolling: touch;
    }
    .channel-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      padding: 14px 0;
      font-size: 0.95rem;
      font-weight: 500;
      color: #4A5B6B;
      min-width: max-content;
    }
    .channel-links a {
      position: relative;
      padding-bottom: 6px;
      transition: color var(--transition-default);
      text-decoration: none;
      color: #4A5B6B;
    }
    .channel-links a:hover,
    .channel-links a.active {
      color: var(--accent-signal);
    }
    .channel-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--accent-signal);
      transition: width var(--transition-default);
    }
    .channel-links a:hover::after,
    .channel-links a.active::after {
      width: 100%;
    }

    /* Hero */
    .hero {
      background: linear-gradient(105deg, #ffffff 0%, #F4F8FC 100%);
      padding: 90px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-decor {
      position: absolute;
      right: -20px;
      top: 50%;
      transform: translateY(-50%);
      width: 48%;
      max-width: 700px;
      opacity: 0.25;
      pointer-events: none;
      background: url('/assets/images/backpic/back-1.webp') center/contain no-repeat;
      height: 100%;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 600px;
    }
    .metric-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 1.8rem;
      margin: 2.5rem 0 2rem;
    }
    .metric-item {
      background: rgba(255,255,255,0.7);
      backdrop-filter: blur(4px);
      padding: 1rem 1.8rem;
      border-radius: 16px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
      text-align: center;
      min-width: 130px;
    }
    .metric-number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent-signal);
      font-feature-settings: "tnum";
      letter-spacing: -0.5px;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .btn-primary {
      background: var(--accent-signal);
      color: #fff;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1.1rem;
      display: inline-block;
      transition: all var(--transition-default);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
      color: #fff;
      text-decoration: none;
    }
    .btn-outline {
      border: 2px solid var(--primary-dark);
      color: var(--primary-dark);
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition-default);
      display: inline-block;
    }
    .btn-outline:hover {
      background: rgba(44,95,138,0.05);
      color: var(--primary-dark);
    }

    /* 通用板块 */
    section {
      padding: 90px 0;
    }
    .section-title {
      font-size: 2.3rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 0.7rem;
      text-align: center;
    }
    .section-sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      text-align: center;
      margin-bottom: 3.5rem;
    }

    /* 实时看板卡片 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .data-card {
      background: var(--card-white);
      padding: 28px 24px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-signal);
      transition: all var(--transition-default);
      display: flex;
      flex-direction: column;
    }
    .data-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      font-size: 2rem;
      color: var(--accent-signal);
      margin-bottom: 12px;
    }
    .data-value {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.2;
    }
    .data-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin: 8px 0 12px;
    }
    .trend-up {
      color: #10ac84;
      font-weight: 600;
    }
    .trend-down {
      color: #ee5a24;
      font-weight: 600;
    }

    /* 服务卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-default);
      text-align: left;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .service-img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .service-desc {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-bottom: 16px;
    }

    /* 对比区块 */
    .compare-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 30px;
      flex-wrap: wrap;
    }
    .compare-card {
      flex: 1;
      min-width: 250px;
      background: #fff;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
    }
    .before-card {
      background: #F0F2F5;
      color: #4a5b6b;
    }
    .after-card {
      background: #fff;
      border-left: 6px solid var(--accent-signal);
    }
    .vs-badge {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-signal);
      background: #fff;
      border-radius: 50%;
      width: 64px;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 18px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: var(--primary-dark);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-top: 0;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .faq-icon {
      color: var(--accent-signal);
    }

    /* CTA 表单 */
    .cta-section {
      background: #EDF2F7;
    }
    .form-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 40px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-wrap: wrap;
      gap: 30px;
      align-items: center;
    }
    .form-left {
      flex: 1;
    }
    .form-right {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .input-field {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border-input);
      border-radius: var(--radius-input);
      font-size: 1rem;
      transition: 0.2s;
    }
    .input-field:focus {
      border-color: var(--accent-signal);
      box-shadow: 0 0 0 3px rgba(0,169,165,0.2);
      outline: none;
    }

    /* 页脚 */
    .footer {
      background: var(--primary-deep);
      color: #BCC8D4;
      padding: 60px 0 30px;
    }
    .footer a {
      color: #BCC8D4;
      transition: color 0.2s;
    }
    .footer a:hover {
      color: #fff;
    }

    @media (max-width: 1024px) {
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 640px) {
      .hero h1 { font-size: 2.2rem; }
      .metric-strip { justify-content: center; }
      .dashboard-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .compare-row { flex-direction: column; }
      .channel-links { gap: 1.5rem; font-size: 0.9rem; }
    }