/* roulang page: index */
:root {
      --primary-deep: #0B2B26;
      --accent-gold: #C8A96E;
      --highlight-cyan: #00C9B6;
      --bg-warm: #FAF8F5;
      --bg-dark: #0F1F1C;
      --text-heading: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8A8A8A;
      --text-light: #F0EDE8;
      --border-light: rgba(0,0,0,0.06);
      --border-dark: rgba(255,255,255,0.08);
      --shadow-card: 0 2px 16px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 32px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-pill: 50px;
      --font-chinese: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      --font-number: "Inter", "SF Pro Display", sans-serif;
      --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-chinese);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-chinese);
      font-weight: 600;
      color: var(--text-heading);
    }
    .container-custom {
      max-width: 1320px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 品牌导航行 */
    .brand-nav {
      background: #fff;
      height: 64px;
      border-bottom: 1px solid var(--border-light);
      position: relative;
      z-index: 1030;
    }
    .brand-nav .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
    }
    .brand-nav .icon-group i {
      font-size: 1.3rem;
      color: var(--text-body);
      margin-left: 24px;
      transition: color 0.2s;
      cursor: default;
    }
    .brand-nav .icon-group i:hover {
      color: var(--accent-gold);
    }
    /* 频道导航行 */
    .channel-nav {
      background: #fff;
      height: 52px;
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 1020;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .channel-links {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .channel-link {
      padding: 8px 20px;
      color: var(--text-body);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      border-radius: 4px;
      transition: all 0.2s;
      position: relative;
      white-space: nowrap;
    }
    .channel-link.active {
      color: var(--primary-deep);
      font-weight: 600;
    }
    .channel-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 20px;
      right: 20px;
      height: 3px;
      background: var(--accent-gold);
      border-radius: 2px;
      transition: 0.3s ease;
    }
    .channel-link:hover {
      color: var(--accent-gold);
    }
    .cta-pill {
      background: var(--accent-gold);
      color: white;
      padding: 8px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      text-decoration: none;
      transition: background 0.3s, transform 0.2s;
      margin-left: auto;
      white-space: nowrap;
    }
    .cta-pill:hover {
      background: #b8995a;
      color: white;
      transform: translateY(-1px);
    }
    /* Hero双栏 */
    .hero-section {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: var(--bg-warm);
    }
    .hero-left h1 {
      font-size: clamp(2.5rem, 5vw, 4.2rem);
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.02em;
      color: var(--primary-deep);
    }
    .hero-tag {
      color: var(--highlight-cyan);
      letter-spacing: 0.08em;
      font-weight: 500;
      font-size: 0.9rem;
      text-transform: uppercase;
    }
    .btn-primary-gold {
      background: var(--accent-gold);
      border: none;
      color: white;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s;
    }
    .btn-primary-gold:hover {
      background: #b8995a;
      box-shadow: 0 4px 12px rgba(200,169,110,0.3);
    }
    .btn-outline-gold {
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      background: transparent;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.3s;
    }
    .btn-outline-gold:hover {
      background: rgba(200,169,110,0.08);
      color: #b8995a;
    }
    .trust-strip {
      font-size: 0.85rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .hero-right {
      position: relative;
      min-height: 400px;
    }
    .hero-right .visual-bg {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      width: 100%;
      height: 100%;
      min-height: 450px;
      border-radius: 24px;
      position: relative;
      overflow: hidden;
    }
    .overlay-geo {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(11,43,38,0.2) 0%, rgba(0,201,182,0.1) 100%);
      mix-blend-mode: overlay;
    }
    /* 区块通用 */
    .section-block {
      padding: clamp(60px, 8vw, 120px) 0;
    }
    .section-title {
      font-size: clamp(1.8rem, 3.5vw, 2.6rem);
      font-weight: 600;
      margin-bottom: 2rem;
      text-align: center;
    }
    /* 亮点网格 */
    .feature-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: all var(--transition-smooth);
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .data-number {
      font-family: var(--font-number);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--highlight-cyan);
    }
    /* 案例瀑布 */
    .filter-tags .badge-tag {
      background: transparent;
      color: var(--text-body);
      border: 1px solid var(--border-light);
      padding: 6px 18px;
      border-radius: 20px;
      cursor: pointer;
      transition: 0.2s;
    }
    .badge-tag.active {
      background: var(--primary-deep);
      color: white;
      border-color: var(--primary-deep);
    }
    .masonry-grid {
      columns: 2;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      border-radius: var(--radius-card);
      overflow: hidden;
      position: relative;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-card img {
      width: 100%;
      display: block;
      transition: transform 0.4s;
    }
    .case-card:hover img {
      transform: scale(1.03);
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(transparent, rgba(0,0,0,0.7));
      padding: 24px;
      color: white;
    }
    /* 方案对比 */
    .compare-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px;
      border: 1px solid var(--border-light);
    }
    .compare-card.ob-solution {
      border: 2px solid var(--accent-gold);
      background: #fffbf5;
    }
    /* FAQ */
    .accordion-custom .accordion-button {
      font-weight: 500;
      box-shadow: none;
      background: transparent;
      padding: 20px 0;
      border-bottom: 1px solid var(--border-light);
      color: var(--text-heading);
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-deep);
      font-weight: 700;
      background: transparent;
      border-left: 3px solid var(--accent-gold);
      padding-left: 16px;
    }
    /* CTA */
    .cta-dark {
      background: var(--bg-dark);
      position: relative;
    }
    .cta-dark::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
      background-size: 20px 20px;
      pointer-events: none;
    }
    /* 页脚 */
    .footer-magazine {
      background: var(--primary-deep);
      color: #b8b5ae;
    }
    .footer-magazine a {
      color: #b8b5ae;
      text-decoration: none;
    }
    .footer-magazine a:hover {
      color: var(--accent-gold);
    }
    @media (max-width: 991px) {
      .masonry-grid { columns: 2; }
      .hero-right .visual-bg { min-height: 300px; }
    }
    @media (max-width: 767px) {
      .masonry-grid { columns: 1; }
      .channel-links { overflow-x: auto; flex-wrap: nowrap; }
      .hero-section { flex-direction: column; text-align: center; }
      .hero-right { width: 100%; margin-top: 2rem; }
    }