/* roulang page: index */
:root {
      --primary-orange: #F15A24;
      --deep-charcoal: #2E2E2E;
      --warm-porcelain: #FDF8F2;
      --amber-gold: #D4A017;
      --white: #FFFFFF;
      --light-gray: #6B6B6B;
      --border-light: #E6E0D8;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
      --shadow-glow: 0 0 12px rgba(241,90,36,0.15);
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --transition: 0.25s ease;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    }

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

    body {
      font-family: var(--font-stack);
      background-color: var(--warm-porcelain);
      color: var(--deep-charcoal);
      line-height: 1.7;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

    a {
      color: var(--deep-charcoal);
      text-decoration: none;
      transition: color var(--transition);
    }

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

    button, .button {
      cursor: pointer;
      font-family: var(--font-stack);
    }

    h1, h2, h3, h4 {
      font-weight: 600;
      line-height: 1.3;
      color: var(--deep-charcoal);
    }

    h1 { font-size: 2.8rem; letter-spacing: -0.5px; font-weight: 700; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.4rem; }
    .text-small { font-size: 0.85rem; color: var(--light-gray); }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    section {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
      h1 { font-size: 2.2rem; }
      h2 { font-size: 1.8rem; }
      h3 { font-size: 1.3rem; }
    }

    /* ----- 导航 (资讯门户吸顶风格) ----- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(253, 248, 242, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }

    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 0;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary-orange);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .logo i {
      font-size: 2rem;
      color: var(--amber-gold);
    }

    .brand-actions {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }

    .search-icon, .contact-link {
      color: var(--deep-charcoal);
      font-size: 1.1rem;
    }

    .contact-link {
      font-weight: 500;
      border-bottom: 1px solid transparent;
    }

    .contact-link:hover {
      border-bottom-color: var(--primary-orange);
      color: var(--primary-orange);
    }

    .channel-bar {
      display: flex;
      align-items: center;
      gap: 2rem;
      padding: 0.5rem 0 0.75rem;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
      border-top: 1px solid rgba(0,0,0,0.05);
    }

    .channel-bar a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--deep-charcoal);
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: border-color var(--transition), color var(--transition);
    }

    .channel-bar a.active, .channel-bar a:hover {
      color: var(--primary-orange);
      border-bottom-color: var(--primary-orange);
    }

    .hamburger {
      display: none;
      font-size: 1.8rem;
      background: none;
      border: none;
      color: var(--deep-charcoal);
    }

    @media (max-width: 768px) {
      .brand-row {
        flex-wrap: wrap;
      }
      .logo {
        font-size: 1.6rem;
      }
      .channel-bar {
        display: none;
        flex-direction: column;
        gap: 0.8rem;
        padding: 1rem 0;
      }
      .channel-bar.open {
        display: flex;
      }
      .hamburger {
        display: block;
      }
    }

    /* ----- 按钮系统 ----- */
    .btn-primary {
      background: var(--primary-orange);
      color: white;
      border: none;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: background var(--transition), transform var(--transition);
      text-align: center;
    }
    .btn-primary:hover {
      background: #D94E1A;
      color: white;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--deep-charcoal);
      color: var(--deep-charcoal);
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      display: inline-block;
      transition: all var(--transition);
    }
    .btn-outline:hover {
      background: var(--deep-charcoal);
      color: white;
    }

    /* ----- 卡片通用 ----- */
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: box-shadow var(--transition), transform var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    /* ----- Hero 杂志双栏 ----- */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-left h1 {
      margin-bottom: 1.2rem;
    }
    .hero-left .sub {
      font-size: 1.2rem;
      margin-bottom: 2rem;
      color: var(--deep-charcoal);
    }
    .hero-right .hero-card {
      background: var(--white);
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-md);
      transform: rotate(2deg);
      position: relative;
      z-index: 1;
    }
    .hero-right .hero-card img {
      width: 100%;
      height: auto;
      display: block;
    }
    .scroll-hint {
      text-align: center;
      margin-top: 2rem;
      color: var(--light-gray);
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-right .hero-card {
        transform: rotate(0deg);
      }
    }

    /* ----- 数据徽章网格 ----- */
    .badge-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .badge-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--amber-gold);
      text-shadow: 0 0 10px rgba(212,160,23,0.3);
    }
    @media (max-width: 768px) {
      .badge-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ----- 服务网格 ----- */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .service-card {
      padding: 2rem 1.5rem;
      text-align: left;
    }
    .service-icon {
      font-size: 2.2rem;
      color: var(--deep-charcoal);
      margin-bottom: 1rem;
      transition: color var(--transition);
    }
    .service-card:hover .service-icon {
      color: var(--primary-orange);
    }
    .service-title-line {
      width: 30px;
      height: 2px;
      background: transparent;
      margin: 0.5rem 0 1rem;
      transition: background var(--transition);
    }
    .service-card:hover .service-title-line {
      background: var(--primary-orange);
    }
    @media (max-width: 768px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ----- 瀑布流案例 ----- */
    .masonry {
      columns: 3;
      column-gap: 1.8rem;
    }
    .case-item {
      break-inside: avoid;
      margin-bottom: 1.8rem;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition);
    }
    .case-item:hover {
      transform: scale(1.02);
    }
    .case-item img {
      border-radius: 12px 12px 0 0;
      width: 100%;
    }
    .case-text {
      padding: 1.2rem;
    }
    .tag {
      display: inline-block;
      background: var(--warm-porcelain);
      color: var(--primary-orange);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    @media (max-width: 1024px) {
      .masonry { columns: 2; }
    }
    @media (max-width: 520px) {
      .masonry { columns: 1; }
    }

    /* ----- 对比表 ----- */
    .compare-wrapper {
      display: flex;
      gap: 2rem;
      align-items: flex-start;
    }
    .compare-col {
      flex: 1;
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
    }
    .compare-col.recommended {
      border: 2px solid var(--primary-orange);
      position: relative;
    }
    .badge-recommend {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--primary-orange);
      color: white;
      padding: 0.3rem 1.2rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .vs-divider {
      font-weight: 700;
      font-size: 1.5rem;
      align-self: center;
      color: var(--light-gray);
    }
    @media (max-width: 768px) {
      .compare-wrapper {
        flex-direction: column;
        overflow-x: auto;
      }
      .vs-divider {
        display: none;
      }
    }

    /* ----- FAQ 折叠 ----- */
    .accordion-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1rem 0;
    }
    .accordion-title {
      font-weight: 600;
      font-size: 1.1rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.8rem;
      color: var(--deep-charcoal);
    }
    .accordion-title i {
      color: var(--amber-gold);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding-left: 2.2rem;
      color: var(--deep-charcoal);
    }
    .accordion-item.active .accordion-content {
      max-height: 200px;
      padding-top: 0.8rem;
    }
    .accordion-item.active .accordion-title {
      color: var(--primary-orange);
    }

    /* ----- 联系表单 ----- */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .form-card input, .form-card textarea {
      width: 100%;
      padding: 0.9rem;
      border: 1px solid #ddd;
      border-radius: var(--radius-input);
      margin-bottom: 1rem;
      font-family: inherit;
    }
    .form-card input:focus, .form-card textarea:focus {
      outline: none;
      border-color: var(--primary-orange);
      box-shadow: 0 0 0 3px rgba(241,90,36,0.2);
    }
    .info-dark-card {
      background: var(--deep-charcoal);
      color: white;
      border-radius: var(--radius-card);
      padding: 2rem;
    }
    .info-dark-card i {
      color: var(--amber-gold);
      margin-right: 0.8rem;
    }
    @media (max-width: 768px) {
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ----- 页脚 ----- */
    .site-footer {
      background: var(--deep-charcoal);
      color: #ccc;
      padding: 3rem 0 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }
    .footer-grid a {
      color: #ccc;
      display: block;
      margin-bottom: 0.4rem;
    }
    .footer-grid a:hover {
      color: var(--primary-orange);
    }
    .copyright {
      border-top: 1px solid #444;
      padding-top: 1.5rem;
      text-align: center;
      font-size: 0.85rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }