/* roulang page: index */
:root {
      --primary: #C9A96E;
      --primary-dark: #B8952F;
      --secondary: #1A1A2E;
      --bg: #FAFAF5;
      --accent: #D4AF37;
      --text: #2C2C2C;
      --text-light: #5A5A5A;
      --border: #E8E2D5;
      --white: #FFFFFF;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius: 12px;
      --radius-pill: 40px;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "SF Pro Text", sans-serif;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .navbar-brand, .btn, .nav-link {
      font-family: var(--font-heading);
      letter-spacing: 0;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1140px;
      padding-left: 24px;
      padding-right: 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }
    /* 自定义导航 - 搜索主导 */
    .navbar-custom {
      background: rgba(250,250,245,0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      padding: 16px 0;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar-brand {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary) !important;
      letter-spacing: 0.5px;
    }
    .search-wrapper {
      position: relative;
      width: 320px;
    }
    .search-wrapper input {
      width: 100%;
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      padding: 12px 20px 12px 48px;
      font-size: 0.95rem;
      color: var(--text);
      outline: none;
      transition: var(--transition);
    }
    .search-wrapper input::placeholder {
      color: #B0A89A;
      font-weight: 400;
    }
    .search-wrapper input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(201,169,110,0.2);
    }
    .search-icon {
      position: absolute;
      left: 18px;
      top: 50%;
      transform: translateY(-50%);
      color: #B0A89A;
      font-size: 1rem;
    }
    .navbar-nav .nav-link {
      color: var(--text-light) !important;
      font-weight: 500;
      font-size: 0.95rem;
      padding: 0.5rem 1rem !important;
      transition: var(--transition);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--primary) !important;
    }
    .navbar-toggler {
      border: none;
      color: var(--primary);
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    @media (max-width: 992px) {
      .search-wrapper {
        width: 100%;
        margin: 12px 0;
        order: 3;
      }
      .navbar-brand {
        order: 1;
      }
      .navbar-toggler {
        order: 2;
      }
      .navbar-collapse {
        order: 4;
      }
      .navbar-nav {
        text-align: center;
      }
    }
    /* 按钮 */
    .btn-primary-custom {
      background: var(--primary);
      color: var(--secondary);
      border: none;
      border-radius: 30px;
      padding: 12px 32px;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
    }
    .btn-primary-custom:hover {
      background: var(--accent);
      transform: scale(1.03);
      color: var(--secondary);
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: 30px;
      padding: 12px 32px;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background: rgba(201,169,110,0.08);
      border-color: var(--accent);
      color: var(--accent);
      box-shadow: 0 0 8px rgba(212,175,55,0.3);
    }
    /* Hero */
    #hero {
      padding: 80px 0;
      background: var(--bg);
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      color: var(--secondary);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-light);
      margin: 1.5rem 0 2rem;
    }
    .hero-img-wrapper {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      background: linear-gradient(135deg, rgba(26,26,46,0.7) 0%, rgba(201,169,110,0.3) 100%);
    }
    .hero-img-wrapper img {
      width: 100%;
      height: auto;
      object-fit: cover;
      aspect-ratio: 4/3;
    }
    .particle {
      position: absolute;
      width: 4px;
      height: 4px;
      background: var(--accent);
      border-radius: 50%;
      opacity: 0.4;
      animation: float 6s infinite alternate;
    }
    @keyframes float {
      0% { transform: translateY(0px); opacity: 0.3; }
      100% { transform: translateY(-20px); opacity: 0.7; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2.2rem; }
      #hero { padding: 60px 0; }
    }
    /* 区块通用 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section { padding: 60px 0; }
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 1rem;
    }
    @media (max-width: 768px) {
      .section-title { font-size: 1.6rem; }
    }
    /* 亮点网格 */
    .highlight-card {
      background: transparent;
      padding: 32px 24px;
      text-align: center;
      border-radius: var(--radius);
      transition: var(--transition);
    }
    .highlight-card:hover {
      background: var(--white);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .highlight-icon {
      font-size: 2.5rem;
      color: var(--primary);
      margin-bottom: 1.2rem;
      transition: var(--transition);
    }
    .highlight-card:hover .highlight-icon {
      color: var(--accent);
    }
    .highlight-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    .highlight-card p {
      color: var(--text-light);
      font-size: 0.95rem;
    }
    /* 案例瀑布流 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      background: var(--white);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .masonry-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .masonry-item img {
      width: 100%;
      display: block;
      transition: 0.4s ease;
    }
    .masonry-item:hover img {
      transform: scale(1.03);
    }
    .masonry-overlay {
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(0deg, rgba(26,26,46,0.8) 0%, transparent 60%);
      display: flex;
      align-items: flex-end;
      padding: 20px;
      opacity: 0;
      transition: 0.3s;
    }
    .masonry-item:hover .masonry-overlay {
      opacity: 1;
    }
    .masonry-info {
      color: white;
    }
    .badge-custom {
      background: rgba(201,169,110,0.15);
      color: var(--primary);
      border-radius: 20px;
      padding: 2px 12px;
      font-size: 0.8rem;
      font-weight: 500;
    }
    @media (max-width: 992px) {
      .masonry-grid { column-count: 2; }
    }
    @media (max-width: 768px) {
      .masonry-grid { column-count: 1; }
    }
    /* 方案对比 */
    .comparison-table {
      background: var(--white);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .comp-col {
      padding: 32px;
    }
    .comp-highlight {
      background: rgba(201,169,110,0.05);
    }
    .comp-title {
      font-size: 1.5rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .comp-list {
      list-style: none;
      padding: 0;
    }
    .comp-list li {
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
    }
    .comp-list i {
      margin-right: 10px;
      color: var(--primary);
    }
    /* FAQ */
    .accordion-custom .accordion-button {
      background: transparent;
      font-weight: 500;
      font-size: 1.1rem;
      color: var(--text);
      padding: 18px 0;
      border-bottom: 1px solid var(--border);
      box-shadow: none;
      position: relative;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: transparent;
      box-shadow: none;
    }
    .accordion-custom .accordion-button::before {
      content: '';
      position: absolute;
      left: -12px;
      top: 18px;
      bottom: 18px;
      width: 3px;
      background: transparent;
      transition: 0.35s ease;
    }
    .accordion-custom .accordion-button:not(.collapsed)::before {
      background: var(--primary);
      height: calc(100% - 20px);
    }
    .accordion-custom .accordion-body {
      padding: 16px 0 24px 20px;
      color: var(--text-light);
      line-height: 1.8;
    }
    /* CTA尾屏 */
    #cta {
      background: var(--secondary);
      color: white;
    }
    /* 表单 */
    .form-control-custom {
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 12px 16px;
      background: var(--white);
      transition: var(--transition);
    }
    .form-control-custom:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 2px rgba(201,169,110,0.25);
    }
    footer a {
      color: var(--text-light);
    }
    footer a:hover {
      color: var(--primary);
    }
    .fade-up {
      opacity: 0;
      transform: translateY(20px);
      transition: 0.6s ease-out;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }