/* roulang page: index */
/* :root 设计变量 */
    :root {
      --primary-dark: #0B1D3A;
      --secondary-orange: #E85D04;
      --accent-cyan: #06D6A0;
      --bg-light: #F8F9FA;
      --text-dark: #1A1A2E;
      --text-muted: #6C757D;
      --white: #FFFFFF;
      --light-gray: #F0F1F3;
      --border-light: #E9ECEF;
      --shadow-card: 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;
      --radius-search: 24px;
      --space-section: 90px;
      --font-h1: 2.5rem;
      --font-h2: 1.8rem;
      --font-h3: 1.25rem;
      --font-body: 1rem;
      --font-sm: 0.85rem;
    }

    /* 基础Reset与全局 */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.7;
      margin: 0;
      font-size: var(--font-body);
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, .h1, .h2, .h3 {
      font-weight: 700;
      line-height: 1.3;
      color: var(--primary-dark);
    }
    h1 { font-size: var(--font-h1); line-height: 1.2; }
    h2 { font-size: var(--font-h2); }
    h3 { font-size: var(--font-h3); font-weight: 600; }
    a {
      color: var(--secondary-orange);
      transition: color 0.2s ease;
    }
    a:hover {
      color: #D14B00;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .button {
      font-family: inherit;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.25s ease;
      cursor: pointer;
    }
    .button.primary {
      background-color: var(--secondary-orange);
      color: white;
      border: none;
    }
    .button.primary:hover {
      background-color: #D14B00;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(232,93,4,0.4);
    }
    .button.secondary {
      background: transparent;
      border: 2px solid var(--primary-dark);
      color: var(--primary-dark);
    }
    .button.secondary:hover {
      background: var(--primary-dark);
      color: white;
    }
    .button.white-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
    }
    .button.white-outline:hover {
      background: white;
      color: var(--primary-dark);
    }

    /* 自定义容器，微调Foundation宽度 */
    .custom-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* 导航样式：搜索主导型 */
    .star-header {
      background: var(--white);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 0.8rem 0;
      position: sticky;
      top: 0;
      z-index: 40;
    }
    .nav-grid {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1.5rem;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary-dark);
      white-space: nowrap;
    }
    .logo-area i {
      color: var(--secondary-orange);
      font-size: 2rem;
    }
    .search-wrapper {
      flex: 1;
      max-width: 480px;
      position: relative;
    }
    .search-wrapper input {
      width: 100%;
      background: var(--light-gray);
      border: 2px solid transparent;
      border-radius: var(--radius-search);
      padding: 0.7rem 1rem 0.7rem 2.8rem;
      font-size: 0.95rem;
      transition: all 0.2s;
      outline: none;
    }
    .search-wrapper input:focus {
      border-color: var(--secondary-orange);
      background: white;
      box-shadow: 0 0 0 3px rgba(232,93,4,0.2);
    }
    .search-wrapper .search-icon {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 1.2rem;
    }
    .nav-links {
      display: flex;
      gap: 1.8rem;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 0.95rem;
      text-decoration: none;
    }
    .nav-links a:hover {
      color: var(--secondary-orange);
    }
    .mobile-search-icon {
      display: none;
      font-size: 1.5rem;
      color: var(--primary-dark);
    }

    /* Hero 双栏杂志流 */
    .hero-section {
      background: var(--primary-dark);
      color: white;
      padding: 3rem 0 4rem;
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      top: 0;
      left: 0;
      width: 55%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.25;
      z-index: 0;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      position: relative;
      z-index: 2;
    }
    .hero-left {
      flex: 0 0 55%;
      min-height: 320px;
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      border-radius: 16px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.3);
    }
    .hero-right {
      flex: 1;
    }
    .hero-right h1 {
      color: white;
      margin-bottom: 1rem;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: rgba(255,255,255,0.85);
      margin-bottom: 2rem;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    /* 通用板块间距 */
    .section {
      padding: var(--space-section) 0;
    }
    .section-dark {
      background: var(--primary-dark);
      color: white;
    }
    .section-title {
      margin-bottom: 1rem;
      font-weight: 700;
    }
    .section-subtitle {
      color: var(--text-muted);
      margin-bottom: 2.5rem;
      font-size: 1.1rem;
    }

    /* 亮点网格 3x2 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .highlight-item {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      text-align: center;
      box-shadow: var(--shadow-card);
      border-bottom: 4px solid var(--accent-cyan);
      transition: all 0.3s;
    }
    .highlight-item:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .highlight-icon {
      font-size: 2.5rem;
      color: var(--secondary-orange);
      margin-bottom: 1rem;
    }
    .highlight-number {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--primary-dark);
    }

    /* 案例瀑布 错落网格 */
    .waterfall {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .waterfall .card-large {
      grid-column: span 2;
    }
    .waterfall .card-small {
      grid-column: span 1;
    }
    .case-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: 0.3s;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .case-card:hover img {
      transform: scale(1.04);
    }
    .case-content {
      padding: 1.2rem 1.5rem;
    }
    .case-tag {
      color: var(--secondary-orange);
      font-weight: 600;
      font-size: 0.8rem;
      text-transform: uppercase;
    }

    /* 方案对比 */
    .compare-panel {
      display: flex;
      gap: 2rem;
      align-items: stretch;
    }
    .compare-left, .compare-right {
      flex: 1;
      background: white;
      border-radius: var(--radius-card);
      padding: 2.5rem;
      box-shadow: var(--shadow-card);
    }
    .compare-left {
      border: 1px solid var(--border-light);
    }
    .compare-right {
      background: var(--primary-dark);
      color: white;
      position: relative;
    }
    .recommend-badge {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--accent-cyan);
      color: var(--primary-dark);
      font-weight: 700;
      padding: 0.3rem 1.2rem;
      border-radius: 20px;
      font-size: 0.9rem;
    }

    /* FAQ 手风琴风格 */
    .faq-list .accordion-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
      padding: 1.2rem 0;
      font-weight: 600;
      font-size: 1.1rem;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
      color: var(--primary-dark);
    }
    .faq-answer {
      padding: 0 0 1.2rem;
      color: var(--text-muted);
      display: none;
    }
    .faq-answer.open {
      display: block;
    }

    /* 全局CTA横幅 */
    .cta-banner {
      background: var(--primary-dark);
      padding: 4rem 2rem;
      text-align: center;
      border-radius: 16px;
    }

    /* 页脚 */
    .footer {
      background: #0B1D3A;
      color: #CCD6E0;
      padding: 4rem 0 2rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
    }
    .footer a {
      color: #CCD6E0;
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--secondary-orange);
    }
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.9rem;
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-left { flex: 0 0 45%; }
      .highlights-grid { grid-template-columns: repeat(2,1fr); }
      .waterfall { grid-template-columns: repeat(2,1fr); }
      .compare-panel { flex-direction: column; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-search-icon { display: block; }
      .search-wrapper { display: none; }
      .hero-grid { flex-direction: column; }
      .hero-left { width: 100%; height: 260px; }
      .highlights-grid { grid-template-columns: 1fr; }
      .waterfall { grid-template-columns: 1fr; }
      .waterfall .card-large { grid-column: span 1; }
      .footer-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 520px) {
      .footer-grid { grid-template-columns: 1fr; }
    }