/* roulang page: index */
:root {
      --color-primary: #2D1B3E;
      --color-accent: #E84A5F;
      --color-warm: #FFB347;
      --bg-global: #FAF8F5;
      --bg-card: #FFFFFF;
      --bg-dark: #2D1B3E;
      --text-heading: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8C8C8C;
      --text-light: #FFFFFF;
      --text-dark-bg: #F0E6F6;
      --border-light: #E0D9D0;
      --shadow-card: 0 2px 12px rgba(45,27,62,0.06);
      --shadow-card-hover: 0 8px 24px rgba(45,27,62,0.12);
      --shadow-nav: 0 2px 20px rgba(0,0,0,0.08);
      --shadow-btn-hover: 0 6px 18px rgba(232,74,95,0.3);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-base: 0.25s ease;
      --transition-card: 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-global);
      color: var(--text-body);
      margin: 0;
      font-size: 1rem;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3 {
      font-family: var(--font-serif);
      color: var(--text-heading);
      margin-top: 0;
    }
    h1 {
      font-size: 2.5rem;
      line-height: 1.2;
      font-weight: 700;
    }
    h2 {
      font-size: 1.75rem;
      line-height: 1.3;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    h3 {
      font-size: 1.25rem;
      line-height: 1.4;
      font-weight: 600;
    }
    p {
      margin-bottom: 1.2em;
      color: var(--text-body);
    }
    a {
      color: var(--color-accent);
      text-decoration: none;
      transition: color var(--transition-base);
    }
    a:hover {
      color: #C0392B;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1140px;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 按钮定制 */
    .btn-primary-custom {
      background-color: var(--color-accent);
      border: none;
      border-radius: var(--radius-btn);
      padding: 0.8rem 2rem;
      font-weight: 600;
      color: white;
      transition: background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
      display: inline-block;
      text-align: center;
    }
    .btn-primary-custom:hover {
      background-color: #C0392B;
      box-shadow: var(--shadow-btn-hover);
      color: white;
      transform: translateY(-2px);
    }
    .btn-outline-light-custom {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.6);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.6rem 1.8rem;
      transition: all var(--transition-base);
    }
    .btn-outline-light-custom:hover {
      background: rgba(255,255,255,0.15);
      border-color: white;
      color: white;
    }
    /* 导航杂志频道风格 */
    .navbar-custom {
      background-color: #fff;
      position: sticky;
      top: 0;
      z-index: 1020;
      box-shadow: none;
      transition: box-shadow var(--transition-base);
      padding: 0;
    }
    .navbar-custom.scrolled {
      box-shadow: var(--shadow-nav);
    }
    .brand-row {
      padding: 0.8rem 0;
      border-bottom: 1px solid #f0f0f0;
    }
    .brand-text {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--color-primary);
      letter-spacing: 2px;
      text-decoration: none;
    }
    .channel-row {
      overflow-x: auto;
      white-space: nowrap;
      padding: 0.6rem 0;
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    .channel-row::-webkit-scrollbar {
      display: none;
    }
    .channel-link {
      display: inline-block;
      margin-right: 2rem;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      text-decoration: none;
      position: relative;
      padding-bottom: 4px;
      transition: color var(--transition-base);
    }
    .channel-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background-color: var(--color-accent);
      transition: width var(--transition-base);
    }
    .channel-link:hover {
      color: var(--color-accent);
    }
    .channel-link:hover::after {
      width: 100%;
    }
    /* Hero */
    .hero-section {
      min-height: 90vh;
      background: linear-gradient(rgba(45,27,62,0.75), rgba(45,27,62,0.8)), url('/assets/images/backpic/hero-bg.jpg') center/cover no-repeat;
      display: flex;
      align-items: center;
      color: white;
    }
    .hero-content {
      max-width: 650px;
    }
    .hero-title {
      color: white;
      animation: fadeInUp 0.9s ease;
    }
    .hero-sub {
      font-size: 1.125rem;
      color: rgba(255,255,255,0.9);
      margin-bottom: 2rem;
    }
    .hero-link {
      color: white;
      text-decoration: underline;
      margin-left: 1.5rem;
      font-weight: 500;
      transition: opacity var(--transition-base);
    }
    .hero-link:hover {
      opacity: 0.8;
      color: white;
    }
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    /* 解决方案卡片 */
    .solution-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: transform var(--transition-card), box-shadow var(--transition-card);
      height: 100%;
    }
    .solution-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .solution-card img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }
    .solution-card .card-body {
      padding: 1.5rem;
    }
    /* 成果数据 */
    .results-section {
      background-color: var(--bg-dark);
      color: white;
      padding: 5rem 0;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--color-warm);
      line-height: 1.2;
      animation: countUp 1.5s ease;
    }
    .stat-label {
      font-size: 0.875rem;
      color: rgba(255,255,255,0.8);
    }
    /* 客户证言 */
    .testimonial-card {
      background: transparent;
      border: none;
      border-bottom: 1px solid var(--border-light);
      padding: 2rem 0;
    }
    .testimonial-avatar {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      object-fit: cover;
    }
    .testimonial-quote {
      font-style: italic;
      position: relative;
      padding-left: 2rem;
    }
    .testimonial-quote::before {
      content: "“";
      font-size: 2rem;
      color: var(--color-accent);
      position: absolute;
      left: 0;
      top: -10px;
      line-height: 1;
    }
    /* CTA */
    .cta-section {
      background: linear-gradient(rgba(45,27,62,0.8), rgba(45,27,62,0.85)), url('/assets/images/backpic/cta-bg.jpg') center/cover no-repeat;
      padding: 5rem 0;
      color: white;
    }
    /* FAQ 手风琴覆盖 */
    .accordion-button {
      background-color: white;
      color: var(--text-heading);
      font-weight: 500;
      border-bottom: 1px solid var(--border-light);
      box-shadow: none;
      padding: 1.2rem 0;
      font-size: 1rem;
    }
    .accordion-button:not(.collapsed) {
      color: var(--color-accent);
      background-color: white;
      box-shadow: none;
      border-left: 4px solid var(--color-accent);
      padding-left: 1rem;
    }
    .accordion-button:focus {
      box-shadow: 0 0 0 2px rgba(232,74,95,0.25);
      border-color: transparent;
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
    }
    .accordion-body {
      padding: 1.5rem 1rem;
      color: var(--text-body);
    }
    /* 页脚 */
    .footer-section {
      background-color: var(--bg-dark);
      color: rgba(255,255,255,0.8);
      padding: 4rem 0 2rem;
    }
    .footer-brand {
      font-family: var(--font-serif);
      font-size: 1.8rem;
      font-weight: 700;
      color: white;
    }
    .footer-link {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      margin-bottom: 0.4rem;
      display: block;
    }
    .footer-link:hover {
      color: white;
    }
    .copyright {
      font-size: 0.75rem;
      color: rgba(255,255,255,0.5);
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 1.5rem;
      margin-top: 2rem;
    }
    @media (max-width: 768px) {
      h1 { font-size: 2rem; }
      h2 { font-size: 1.5rem; }
      .hero-content { text-align: center; }
      .hero-link { margin-left: 0; display: block; margin-top: 1rem; }
      .channel-link { margin-right: 1.2rem; }
      .stat-number { font-size: 2.5rem; }
    }