/* roulang page: index */
:root {
      --primary-purple: #6C3CEC;
      --primary-purple-light: #8B5CF6;
      --accent-cyan: #00E5E5;
      --deep-black: #0A0E1A;
      --dark-purple-bg: #1A1040;
      --white: #FFFFFF;
      --light-bg: #F4F6FA;
      --text-dark: #1A1A2E;
      --text-mid: #4A4A6A;
      --text-light: #5A5A7A;
      --warning-orange: #CC5500;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 10px 30px rgba(0,0,0,0.08);
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-pill: 30px;
      --transition-default: all 0.25s ease;
      --font-body: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

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

    body {
      font-family: var(--font-body);
      line-height: 1.7;
      color: var(--text-dark);
      background-color: var(--white);
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-default);
    }

    button, .button {
      cursor: pointer;
      font-family: var(--font-body);
      transition: var(--transition-default);
      border: none;
      outline: none;
    }

    input {
      font-family: var(--font-body);
      outline: none;
    }

    h1, h2, h3, h4 {
      line-height: 1.3;
      margin-bottom: 1rem;
      font-weight: 600;
    }

    h1 {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    h2 {
      font-size: 2.25rem;
      font-weight: 650;
      margin-bottom: 2rem;
    }

    h3 {
      font-size: 1.5rem;
      font-weight: 600;
    }

    h4 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 1.2rem;
      opacity: 0.9;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 99;
      background: var(--white);
      height: 72px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      display: flex;
      align-items: center;
    }

    .top-bar {
      background: transparent;
      padding: 0;
      width: 100%;
    }

    .top-bar .menu {
      background: transparent;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      justify-content: space-between;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 1.75rem;
      color: var(--primary-purple);
    }

    .logo-text {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--primary-purple);
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 1.8rem;
      margin: 0;
      align-items: center;
    }

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-mid);
      padding: 0.25rem 0;
      position: relative;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-purple);
    }

    .nav-links li a.active::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .search-box {
      display: flex;
      align-items: center;
      background: #f0f2f5;
      border-radius: 24px;
      padding: 0.4rem 1rem;
    }

    .search-box i {
      color: var(--text-mid);
      font-size: 0.9rem;
      margin-right: 6px;
    }

    .search-box input {
      border: none;
      background: transparent;
      font-size: 0.9rem;
      width: 140px;
    }

    .btn-nav-cta {
      background: var(--primary-purple);
      color: white;
      border-radius: 24px;
      padding: 0.5rem 1.5rem;
      font-weight: 600;
      font-size: 0.9rem;
      white-space: nowrap;
      border: none;
    }

    .btn-nav-cta:hover {
      background: var(--primary-purple-light);
      box-shadow: 0 0 14px rgba(108,60,236,0.4);
    }

    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, var(--deep-black) 0%, var(--dark-purple-bg) 100%);
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      color: white;
    }

    .hero-bg-img {
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      z-index: 0;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .hero-left {
      flex: 1 1 500px;
    }

    .hero-left h1 {
      color: white;
      margin-bottom: 1.5rem;
    }

    .hero-left h1 .highlight {
      color: var(--primary-purple-light);
      background: linear-gradient(90deg, #8B5CF6, #A78BFA);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 2.5rem;
      max-width: 550px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
      color: white;
      border-radius: var(--radius-pill);
      padding: 0.8rem 2rem;
      font-weight: 600;
      font-size: 1rem;
      border: none;
      box-shadow: 0 6px 18px rgba(108,60,236,0.3);
    }

    .btn-primary:hover {
      box-shadow: 0 0 20px rgba(108,60,236,0.7);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      border-radius: var(--radius-pill);
      padding: 0.8rem 2rem;
      font-weight: 600;
      font-size: 1rem;
    }

    .btn-outline:hover {
      background: var(--accent-cyan);
      color: var(--deep-black);
      border-color: var(--accent-cyan);
    }

    .hero-data-badges {
      display: flex;
      gap: 20px;
      margin-top: 30px;
      flex-wrap: wrap;
    }

    .live-badge {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(10px);
      border-radius: 12px;
      padding: 0.8rem 1.2rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(255,255,255,0.15);
    }

    .live-num {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent-cyan);
      font-variant-numeric: tabular-nums;
    }

    .hero-right {
      flex: 1 1 350px;
      display: flex;
      justify-content: center;
    }

    /* 通用板块 */
    .section-padding {
      padding: 100px 0;
    }

    .bg-light {
      background-color: var(--light-bg);
    }

    .bg-white {
      background-color: var(--white);
    }

    .section-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 28px;
    }

    .card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-default);
      position: relative;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }

    .badge-top {
      position: absolute;
      top: -10px;
      right: -10px;
      background: linear-gradient(135deg, var(--primary-purple), var(--primary-purple-light));
      color: white;
      border-radius: 20px;
      padding: 0.3rem 1rem;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 痛点卡片 */
    .pain-card {
      border-left: 4px solid rgba(204,85,0,0.5);
      background: var(--white);
      padding: 24px;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      margin-bottom: 20px;
    }

    .pain-icon {
      color: var(--warning-orange);
      font-size: 1.8rem;
      margin-bottom: 10px;
    }

    /* 功能矩阵 */
    .feature-metric {
      font-size: 0.9rem;
      color: var(--accent-cyan);
      font-weight: 600;
      margin-top: 10px;
    }

    /* 实时数据看板 */
    .data-dashboard {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      align-items: center;
    }

    .big-stat {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-purple);
    }

    .testimonial-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .avatar-placeholder {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ddd;
      flex-shrink: 0;
    }

    /* FAQ 手风琴 */
    .accordion-item {
      background: var(--white);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .accordion-title {
      font-weight: 600;
      padding: 18px 24px;
      background: var(--white);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .accordion-content {
      padding: 0 24px 20px;
      color: var(--text-light);
      display: none;
    }

    .accordion-item.active .accordion-content {
      display: block;
    }

    /* 最终 CTA */
    .final-cta {
      background: linear-gradient(135deg, var(--primary-purple) 0%, var(--deep-black) 100%);
      color: white;
      text-align: center;
      padding: 100px 0;
      position: relative;
    }

    .btn-white {
      background: white;
      color: var(--primary-purple);
      border-radius: var(--radius-pill);
      padding: 0.9rem 2.2rem;
      font-weight: 700;
    }

    .btn-ghost-white {
      background: transparent;
      border: 2px solid white;
      color: white;
      border-radius: var(--radius-pill);
      padding: 0.9rem 2.2rem;
      font-weight: 600;
    }

    /* 页脚 */
    .site-footer {
      background: var(--deep-black);
      color: white;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li a {
      color: rgba(255,255,255,0.7);
      font-size: 0.95rem;
    }

    .footer-links li a:hover {
      color: var(--accent-cyan);
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      font-size: 0.85rem;
      color: rgba(255,255,255,0.5);
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 25px;
    }

    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: repeat(2,1fr);
      }
      h1 { font-size: 2.4rem; }
      h2 { font-size: 1.9rem; }
    }

    @media (max-width: 768px) {
      .nav-links, .header-actions .search-box {
        display: none;
      }
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 576px) {
      .container { padding: 0 16px; }
      .section-padding { padding: 60px 0; }
      h1 { font-size: 2rem; }
      .footer-grid { grid-template-columns: 1fr; }
    }