/* roulang page: index */
:root {
      --primary-deep: #1E3A32;
      --accent-gold: #C8A96E;
      --bg-warm: #F7F5F0;
      --text-dark: #2C2C2C;
      --text-muted: #5A5A5A;
      --white: #FFFFFF;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.02);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --border-radius-card: 16px;
      --border-radius-btn: 8px;
      --transition-base: 0.3s ease;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      padding-top: 72px;
    }

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

    a {
      color: inherit;
      text-decoration: none;
    }

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

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

    /* 导航栏 */
    .navbar-k1 {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
      height: 72px;
      padding: 0 1.5rem;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1030;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: background 0.3s;
    }

    .logo {
      font-weight: 700;
      font-size: 1.75rem;
      color: var(--primary-deep);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-dark);
      position: relative;
      padding: 0.5rem 0;
      transition: color 0.2s;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.3s;
    }

    .nav-links a:hover {
      color: var(--primary-deep);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .search-box {
      background: #f0f0f0;
      border-radius: 50px;
      padding: 0.5rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: #6b6b6b;
      font-size: 0.9rem;
      cursor: pointer;
      transition: background 0.2s;
    }

    .search-box:hover {
      background: #e5e5e5;
    }

    .btn-primary-k1 {
      background: var(--primary-deep);
      color: white;
      border: none;
      padding: 0.6rem 1.5rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
      text-align: center;
    }

    .btn-primary-k1:hover {
      background: #152B25;
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline-gold {
      background: transparent;
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 0.6rem 1.5rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      transition: all 0.2s;
    }

    .btn-outline-gold:hover {
      background: var(--accent-gold);
      color: var(--primary-deep);
    }

    .navbar-toggler {
      border: none;
      color: var(--primary-deep);
      font-size: 1.5rem;
    }

    .offcanvas {
      background: var(--primary-deep);
    }
    .offcanvas .nav-link {
      color: white !important;
      font-size: 1.2rem;
      margin: 0.8rem 0;
    }
    .offcanvas .btn-primary-k1 {
      width: 100%;
      margin-top: 1rem;
    }

    /* 板块标题 */
    .section-title {
      font-size: 2rem;
      font-weight: 600;
      color: var(--primary-deep);
      margin-bottom: 0.75rem;
    }
    .section-subtitle {
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto 3rem auto;
    }

    /* Hero */
    .hero-section {
      padding: 3rem 0 5rem;
    }
    .hero-title {
      font-size: 3.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
    }
    .hero-badge {
      display: flex;
      gap: 2rem;
      margin-top: 2rem;
    }
    .badge-item {
      text-align: left;
    }
    .badge-number {
      font-size: 2rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-gold) 0%, var(--primary-deep) 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-image-card {
      background: white;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(200,169,110,0.25);
      transition: transform 0.3s;
    }
    .hero-image-card img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 卡片通用 */
    .card-k1 {
      background: white;
      border-radius: var(--border-radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: all var(--transition-base);
      border: none;
      height: 100%;
    }
    .card-k1:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .icon-box {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, var(--accent-gold), #d4af6b);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.4rem;
      margin-bottom: 1.5rem;
    }

    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.4s;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .case-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 60%;
      background: linear-gradient(to top, rgba(30,58,50,0.9), transparent);
    }
    .case-body {
      padding: 1.5rem;
    }

    /* 对比卡片 */
    .compare-traditional {
      background: #f1f1f1;
      border-radius: var(--border-radius-card);
      padding: 2rem;
    }
    .compare-k1 {
      background: white;
      border-left: 4px solid var(--accent-gold);
      box-shadow: var(--shadow-card);
      border-radius: var(--border-radius-card);
      padding: 2rem;
      position: relative;
    }
    .compare-k1::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: radial-gradient(circle at top left, rgba(200,169,110,0.08), transparent 70%);
      border-radius: var(--border-radius-card);
      pointer-events: none;
    }

    /* 数据墙 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-gold), var(--primary-deep));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* FAQ */
    .accordion-button {
      background: transparent;
      font-weight: 600;
      color: var(--text-dark);
      box-shadow: none;
      border-bottom: 1px solid var(--bg-warm);
      padding: 1.25rem 0;
      font-size: 1.1rem;
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary-deep);
      background: transparent;
      box-shadow: none;
    }
    .accordion-button::after {
      background-image: none;
      content: '+';
      font-size: 1.8rem;
      font-weight: 300;
      color: var(--accent-gold);
      transform: rotate(0);
    }
    .accordion-button:not(.collapsed)::after {
      content: '−';
      transform: rotate(0);
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #1E3A32 0%, #2b4f3f 100%);
    }

    /* 页脚 */
    .footer-k1 {
      background: var(--primary-deep);
      color: #e0e0e0;
    }
    .footer-k1 a {
      color: #ccc;
      transition: color 0.2s;
    }
    .footer-k1 a:hover {
      color: var(--accent-gold);
    }
    .social-circle {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid var(--accent-gold);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-gold);
      margin-right: 0.5rem;
      transition: all 0.2s;
    }
    .social-circle:hover {
      background: var(--accent-gold);
      color: var(--primary-deep);
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .navbar-k1 .nav-links {
        display: none;
      }
      .hero-badge {
        flex-wrap: wrap;
        gap: 1.5rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }