/* roulang page: index */
:root {
      --deep-purple: #4A2C6E;
      --dark-purple: #3D2B56;
      --teal: #00C9A7;
      --orange: #FF6B35;
      --dark-bg: #1E1E2F;
      --light-bg: #F8F9FA;
      --white: #FFFFFF;
      --gray-100: #F1F3F5;
      --gray-200: #E9ECEF;
      --gray-600: #6C757D;
      --gray-800: #343A40;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--gray-800);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航 */
    .navbar-custom {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 15px rgba(0,0,0,0.04);
      padding: 10px 0;
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1020;
    }
    .logo-brand {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--deep-purple);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: -0.5px;
    }
    .logo-icon {
      color: var(--teal);
      font-size: 1.8rem;
    }
    .nav-link-anchor {
      color: var(--gray-800);
      font-weight: 500;
      margin: 0 8px;
      padding: 6px 2px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    .nav-link-anchor:hover,
    .nav-link-anchor.active {
      color: var(--teal);
      border-bottom-color: var(--teal);
    }
    .btn-cta-nav {
      background: var(--orange);
      color: white;
      border-radius: 30px;
      padding: 8px 20px;
      font-weight: 600;
      font-size: 0.9rem;
      border: none;
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .btn-cta-nav:hover {
      background: #E55A2B;
      color: white;
      transform: translateY(-1px);
    }
    .badge-discount {
      background: #dc3545;
      color: white;
      font-size: 0.7rem;
      border-radius: 20px;
      padding: 2px 8px;
      margin-left: 6px;
    }
    /* Hero */
    .hero-section {
      background: linear-gradient(135deg, var(--dark-purple) 0%, #2A1A3F 60%, var(--dark-bg) 100%);
      padding: 140px 0 90px;
      margin-top: 0;
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero-section::before {
      content: "";
      position: absolute;
      right: -5%;
      top: 10%;
      width: 45%;
      height: 80%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: contain;
      background-repeat: no-repeat;
      background-position: center;
      opacity: 0.25;
      pointer-events: none;
    }
    .hero-title {
      font-size: 3.4rem;
      font-weight: 700;
      line-height: 1.3;
      color: white;
    }
    .hero-sub {
      font-size: 1.25rem;
      color: rgba(255,255,255,0.85);
      margin: 24px 0 32px;
      max-width: 550px;
    }
    .btn-primary-cta {
      background: var(--orange);
      border: none;
      border-radius: 30px;
      padding: 14px 34px;
      font-weight: 700;
      font-size: 1.1rem;
      color: white;
      box-shadow: 0 8px 20px rgba(255,107,53,0.3);
      transition: var(--transition);
    }
    .btn-primary-cta:hover {
      background: #E55A2B;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(255,107,53,0.4);
      color: white;
    }
    .btn-outline-white {
      border: 2px solid var(--teal);
      background: transparent;
      color: var(--teal);
      border-radius: 30px;
      padding: 12px 30px;
      font-weight: 600;
    }
    .btn-outline-white:hover {
      background: rgba(0,201,167,0.1);
      color: var(--teal);
    }
    /* 板块通用 */
    .section-padding {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--deep-purple);
      margin-bottom: 16px;
    }
    .section-subtitle {
      color: var(--gray-600);
      font-size: 1.1rem;
      margin-bottom: 48px;
    }
    /* 痛点卡片 */
    .pain-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border-left: 6px solid var(--teal);
      background: #F8F9FA;
      margin-bottom: 24px;
    }
    .pain-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
    }
    .pain-icon {
      color: var(--teal);
      font-size: 2rem;
      margin-bottom: 16px;
    }
    /* 解决方案图文 */
    .solution-img {
      border-radius: 16px;
      box-shadow: var(--shadow-sm);
      width: 100%;
      height: auto;
    }
    .solution-text h3 {
      color: var(--deep-purple);
      font-weight: 700;
    }
    /* 数据仪表盘 */
    .data-block {
      background: var(--dark-bg);
      border-radius: 24px;
      padding: 48px 24px;
      color: white;
    }
    .data-number {
      font-size: 3.2rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--teal), #00e6c3);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    /* 证言卡片 */
    .testimonial-card {
      background: white;
      border-radius: 20px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      position: relative;
      margin-bottom: 24px;
    }
    .testimonial-card::before {
      content: "“";
      font-size: 4rem;
      color: var(--teal);
      position: absolute;
      top: 10px;
      left: 20px;
      opacity: 0.3;
    }
    .avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      object-fit: cover;
      border: 3px solid var(--teal);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: var(--light-bg);
      color: var(--deep-purple);
      font-weight: 700;
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--teal);
      box-shadow: 0 0 0 0.2rem rgba(0,201,167,0.25);
    }
    .accordion-item {
      border-left: 4px solid var(--teal);
      margin-bottom: 12px;
      border-radius: 12px;
      overflow: hidden;
    }
    /* CTA 底栏 */
    .cta-footer-section {
      background: linear-gradient(120deg, var(--deep-purple) 0%, #2E1C4A 100%);
      border-radius: 28px;
      padding: 60px 32px;
      text-align: center;
      color: white;
      margin: 60px 0 40px;
    }
    /* 页脚 */
    .footer-custom {
      background: var(--dark-bg);
      color: #ccc;
      padding: 48px 0 24px;
      font-size: 0.95rem;
    }
    .footer-logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
    }
    .footer-link {
      color: #adb5bd;
      margin-right: 20px;
    }
    .footer-link:hover {
      color: var(--teal);
    }
    @media (max-width: 992px) {
      .hero-title { font-size: 2.8rem; }
      .hero-section::before { opacity: 0.15; width: 70%; right: -20%; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.2rem; }
      .section-title { font-size: 2rem; }
      .navbar-custom .nav-link-anchor { margin: 4px 0; }
      .data-number { font-size: 2.5rem; }
    }
    @media (max-width: 576px) {
      .hero-section { padding: 120px 0 60px; }
      .btn-primary-cta { padding: 12px 24px; font-size: 1rem; }
    }