/* roulang page: index */
:root {
      --primary-purple: #5B2D8E;
      --primary-deep: #1B3A6B;
      --primary-gradient: linear-gradient(135deg, #5B2D8E 0%, #1B3A6B 100%);
      --accent-orange: #FF6B35;
      --accent-orange-hover: #E55A2B;
      --bg-warm: #F9F7FC;
      --bg-white: #FFFFFF;
      --bg-dark: #1E1335;
      --text-dark: #1E1335;
      --text-body: #3A3450;
      --text-muted: #6B6580;
      --text-light: #EBE8F5;
      --border-light: #E4DFF0;
      --success-green: #00C48C;
      --warning-amber: #FFB800;
      --card-shadow: 0 4px 20px rgba(91,45,142,0.06);
      --card-shadow-hover: 0 12px 32px rgba(91,45,142,0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --border-radius-input: 6px;
      --font-heading: 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --transition-base: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.2px;
    }

    a {
      text-decoration: none;
      color: var(--primary-purple);
      transition: var(--transition-base);
    }

    a:hover {
      color: var(--accent-orange);
    }

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

    .container {
      max-width: 1320px;
    }

    /* 按钮体系 */
    .btn-primary-custom {
      background-color: var(--accent-orange);
      border: none;
      color: white;
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      transition: var(--transition-base);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-primary-custom:hover {
      background-color: var(--accent-orange-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255,107,53,0.3);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary-purple);
      color: var(--primary-purple);
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 12px 28px;
      transition: var(--transition-base);
    }
    .btn-outline-custom:hover {
      background-color: rgba(91,45,142,0.05);
      border-color: var(--primary-deep);
      color: var(--primary-deep);
    }
    .btn-link-custom {
      color: var(--primary-purple);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition-base);
    }
    .btn-link-custom i {
      transition: transform 0.2s;
    }
    .btn-link-custom:hover {
      color: var(--accent-orange);
    }
    .btn-link-custom:hover i {
      transform: translateX(4px);
    }

    /* 导航栏 */
    .navbar-custom {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
      transition: background 0.3s, box-shadow 0.3s;
      z-index: 1030;
    }
    .navbar-scrolled {
      background: rgba(255,255,255,1);
      box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }
    .navbar-brand-custom img {
      height: 36px;
    }
    .navbar-nav .nav-link {
      color: var(--text-body) !important;
      font-weight: 500;
      padding: 0.5rem 1rem;
      transition: var(--transition-base);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--accent-orange) !important;
    }
    .hot-tag {
      background: rgba(91,45,142,0.08);
      color: var(--primary-purple);
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 500;
      margin-left: 8px;
    }
    .navbar-toggler {
      border: none;
      color: var(--primary-purple);
    }
    .offcanvas-end {
      background: var(--bg-white);
    }
    .offcanvas-body .nav-link {
      font-size: 1.1rem;
    }

    /* Hero */
    #hero {
      padding: 140px 0 80px;
      background: linear-gradient(135deg, rgba(249,247,252,1) 0%, rgba(235,232,245,0.8) 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.2;
      color: var(--text-dark);
    }
    .hero-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 500px;
    }
    .trust-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .hero-image-wrapper {
      position: relative;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow-hover);
    }
    .hero-image-wrapper img {
      width: 100%;
      height: auto;
    }
    .hero-overlay {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background: linear-gradient(135deg, rgba(91,45,142,0.15), rgba(27,58,107,0.05));
    }
    .particle-bg {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: radial-gradient(circle at 20% 30%, rgba(91,45,142,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }

    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      font-size: 32px;
      margin-bottom: 0.5rem;
      color: var(--text-dark);
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 3rem;
    }

    /* 卡片 */
    .card-custom {
      background: var(--bg-white);
      border: none;
      border-radius: var(--border-radius-card);
      padding: 32px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }
    .icon-box {
      width: 60px;
      height: 60px;
      background: rgba(91,45,142,0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      color: var(--primary-purple);
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
      transition: 0.2s;
    }
    .card-custom:hover .icon-box {
      transform: scale(1.08);
      background: rgba(91,45,142,0.12);
    }

    /* 深色区块 */
    .bg-dark-stats {
      background-color: var(--bg-dark);
      color: white;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
    }
    .stat-number {
      font-family: 'Inter', sans-serif;
      font-weight: 700;
      font-size: 2.8rem;
      color: var(--accent-orange);
      letter-spacing: 1px;
    }

    /* 案例卡片 */
    .case-card {
      background: var(--bg-white);
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      transition: var(--transition-base);
    }
    .case-card:hover {
      box-shadow: var(--card-shadow-hover);
    }
    .case-img {
      height: 180px;
      object-fit: cover;
    }
    .case-body {
      padding: 20px;
    }

    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: rgba(91,45,142,0.04);
      color: var(--primary-purple);
      font-weight: 600;
      box-shadow: none;
    }
    .accordion-button:focus {
      border-color: var(--primary-purple);
      box-shadow: 0 0 0 0.2rem rgba(91,45,142,0.15);
    }

    /* CTA */
    .cta-section {
      background: var(--primary-gradient);
      color: white;
      border-radius: 24px;
      padding: 60px;
    }

    /* 页脚 */
    footer {
      background: var(--bg-dark);
      color: var(--text-light);
    }
    footer a {
      color: var(--text-light);
      text-decoration: none;
    }
    footer a:hover {
      color: var(--accent-orange);
    }

    @media (max-width: 992px) {
      .hero-title { font-size: 36px; }
      section { padding: 70px 0; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 28px; }
      .card-custom { padding: 24px; }
      .btn-primary-custom, .btn-outline-custom { width: 100%; justify-content: center; }
    }