/* roulang page: index */
:root {
      --primary-deep: #0A0E17;
      --accent-gold: #D4AF37;
      --accent-gold-hover: #B8942E;
      --warm-white: #F5F5F0;
      --bg-cream: #F9F9F6;
      --text-body: #4A4A4A;
      --text-light: #6B6B6B;
      --border-subtle: rgba(0,0,0,0.04);
      --shadow-card: 0 4px 20px rgba(0,0,0,0.03);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --border-radius: 12px;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
      --font-heading: 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-body);
      background-color: var(--bg-cream);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
    }
    
    h1, h2, h3, h4, .nav-logo-text {
      font-family: var(--font-heading);
      color: var(--primary-deep);
    }
    
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-smooth);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1320px;
      padding-left: 20px;
      padding-right: 20px;
      margin: 0 auto;
    }
    
    /* 导航栏 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: rgba(10, 14, 23, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(212, 175, 55, 0.15);
      transition: var(--transition-smooth);
      padding: 0;
    }
    
    .navbar-custom .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    
    .logo-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--warm-white);
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 0.5px;
    }
    
    .logo-icon {
      font-size: 2rem;
      color: var(--accent-gold);
      line-height: 1;
    }
    
    .nav-logo-text {
      font-weight: 900;
      color: #fff;
    }
    
    .nav-center-links {
      display: flex;
      gap: 2.2rem;
    }
    
    .nav-link-item {
      color: var(--accent-gold);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
      letter-spacing: 0.3px;
    }
    
    .nav-link-item::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }
    
    .nav-link-item:hover::after,
    .nav-link-item.active::after {
      width: 100%;
    }
    
    .nav-right-actions {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }
    
    .search-icon {
      color: var(--warm-white);
      font-size: 1.2rem;
      cursor: pointer;
      transition: color 0.2s;
    }
    
    .search-icon:hover {
      color: var(--accent-gold);
    }
    
    .btn-outline-gold {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
      border-radius: 30px;
      padding: 0.5rem 1.6rem;
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
    }
    
    .btn-outline-gold:hover {
      background: var(--accent-gold);
      color: var(--primary-deep);
      border-color: var(--accent-gold);
    }
    
    .btn-solid-gold {
      background: var(--accent-gold);
      border: none;
      color: var(--primary-deep);
      border-radius: 30px;
      padding: 0.55rem 1.8rem;
      font-weight: 700;
      font-size: 0.9rem;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 12px rgba(212, 175, 55, 0.3);
    }
    
    .btn-solid-gold:hover {
      background: var(--accent-gold-hover);
      box-shadow: 0 0 22px rgba(212, 175, 55, 0.5);
      color: #000;
    }
    
    /* 移动端菜单 */
    .navbar-toggler {
      border: none;
      color: var(--warm-white);
      font-size: 1.5rem;
    }
    
    .offcanvas-custom {
      background: var(--primary-deep);
      color: var(--warm-white);
    }
    
    .offcanvas-custom .nav-link-item {
      color: var(--accent-gold);
      font-size: 1.2rem;
      margin: 12px 0;
    }
    
    /* Hero */
    .hero-section {
      padding: 160px 0 120px;
      background: var(--primary-deep);
      position: relative;
      overflow: hidden;
    }
    
    .hero-content {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    
    .hero-left {
      flex: 1;
    }
    
    .hero-h1 {
      font-size: 4.2rem;
      font-weight: 900;
      letter-spacing: -0.02em;
      color: #fff;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    
    .hero-subtitle {
      font-size: 1.3rem;
      color: rgba(255,255,255,0.75);
      margin-bottom: 2.5rem;
      min-height: 2.5rem;
    }
    
    .hero-cta-group {
      display: flex;
      gap: 1.2rem;
    }
    
    .hero-right {
      flex: 1;
      position: relative;
      display: flex;
      justify-content: center;
    }
    
    .hero-visual {
      width: 100%;
      max-width: 500px;
      height: 380px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 24px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      animation: floatVisual 6s ease-in-out infinite;
    }
    
    .gold-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(135deg, rgba(212,175,55,0.25) 0%, rgba(10,14,23,0.3) 100%);
    }
    
    @keyframes floatVisual {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-10px); }
      100% { transform: translateY(0px); }
    }
    
    /* 亮点网格 */
    .section-padding {
      padding: 120px 0;
    }
    
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      position: relative;
      padding-left: 24px;
    }
    
    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 8px;
      bottom: 8px;
      width: 4px;
      background: var(--accent-gold);
      border-radius: 2px;
    }
    
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 50px;
    }
    
    .highlight-card {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      height: 280px;
      background-size: cover;
      background-position: center;
      transition: var(--transition-smooth);
    }
    
    .highlight-card:hover {
      transform: scale(1.02);
    }
    
    .highlight-card .mask {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      padding: 2rem 1.5rem;
      background: linear-gradient(transparent, rgba(10,14,23,0.85));
      color: #fff;
    }
    
    .highlight-card h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 0.3rem;
    }
    
    /* 案例瀑布流 */
    .cases-masonry {
      column-count: 3;
      column-gap: 24px;
      margin-top: 40px;
    }
    
    .case-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: transparent;
    }
    
    .case-item img {
      border-radius: 12px;
      width: 100%;
      height: auto;
    }
    
    .case-tag {
      color: var(--accent-gold);
      font-weight: 600;
      font-size: 0.85rem;
      margin: 12px 0 4px;
    }
    
    .case-title {
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--primary-deep);
    }
    
    /* 对比表 */
    .compare-wrapper {
      display: flex;
      background: #fff;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    
    .compare-left, .compare-right {
      flex: 1;
      padding: 2.5rem;
    }
    
    .compare-left {
      background: #EEEEEA;
      color: #5A5A5A;
    }
    
    .compare-right {
      background: #FFF;
    }
    
    .compare-col-title {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 2rem;
    }
    
    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 1.2rem;
      font-size: 1rem;
    }
    
    .icon-check {
      color: var(--accent-gold);
    }
    
    .icon-cross {
      color: #999;
    }
    
    /* FAQ */
    .accordion-custom .accordion-item {
      background: var(--warm-white);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      margin-bottom: 16px;
    }
    
    .accordion-button {
      font-weight: 700;
      font-size: 1.15rem;
      background: var(--bg-cream);
      color: var(--primary-deep);
      box-shadow: none;
    }
    
    .accordion-button:not(.collapsed) {
      background: var(--warm-white);
    }
    
    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary-deep);
      padding: 80px 0;
      text-align: center;
    }
    
    .cta-banner h2 {
      color: #fff;
      font-size: 2.8rem;
    }
    
    /* 页脚 */
    .footer-dark {
      background: var(--primary-deep);
      color: #ccc;
      padding: 60px 0 30px;
    }
    
    .footer-gold-line {
      border-top: 1px solid var(--accent-gold);
      margin: 2rem 0 1.5rem;
      opacity: 0.3;
    }
    
    .social-icons a {
      color: #ccc;
      margin-right: 16px;
      font-size: 1.3rem;
    }
    
    .social-icons a:hover {
      color: var(--accent-gold);
    }
    
    @media (max-width: 992px) {
      .hero-h1 { font-size: 3rem; }
      .highlights-grid { grid-template-columns: repeat(2,1fr); }
      .cases-masonry { column-count: 2; }
    }
    
    @media (max-width: 768px) {
      .hero-content { flex-direction: column; }
      .hero-right { margin-top: 2rem; }
      .highlights-grid { grid-template-columns: 1fr; }
      .cases-masonry { column-count: 1; }
      .compare-wrapper { flex-direction: column; }
      .section-title { font-size: 2rem; }
    }