/* roulang page: index */
:root {
      --color-primary: #C8102E;
      --color-primary-hover: #A00B24;
      --color-secondary: #1A1A1A;
      --color-accent: #D4AF37;
      --color-bg: #F5F0E8;
      --color-card-bg: #FFFFFF;
      --color-text: #1A1A1A;
      --color-text-soft: #333333;
      --color-muted: #666666;
      --color-border: #E0DBD2;
      --color-faq-bg: #EAE5DE;
      --font-heading: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
      --font-body: 'Noto Sans SC', 'Inter', system-ui, sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
      --max-width: 1280px;
      --header-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--color-bg);
      color: var(--color-text-soft);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-heading);
      color: var(--color-text);
    }
    h1 {
      font-size: 42px;
      line-height: 1.15;
      letter-spacing: -0.5px;
      font-weight: 800;
    }
    h2 {
      font-size: 32px;
      line-height: 1.25;
      font-weight: 700;
      margin-bottom: 12px;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
      font-weight: 600;
    }
    h4 {
      font-size: 18px;
      font-weight: 600;
    }
    p {
      color: var(--color-text-soft);
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, input, select, textarea {
      font-family: var(--font-body);
    }
    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
      cursor: pointer;
      padding: 14px 32px;
      font-size: 16px;
      line-height: 1.2;
      border: 2px solid transparent;
    }
    .btn-primary {
      background-color: var(--color-primary);
      color: white;
      border-color: var(--color-primary);
    }
    .btn-primary:hover {
      background-color: var(--color-primary-hover);
      border-color: var(--color-primary-hover);
      box-shadow: 0 4px 12px rgba(200,16,46,0.4);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      color: var(--color-primary);
      border-color: var(--color-primary);
    }
    .btn-outline:hover {
      background: var(--color-primary);
      color: white;
    }
    .btn-gold {
      background: transparent;
      color: var(--color-accent);
      border-color: var(--color-accent);
      font-weight: 600;
    }
    .btn-gold:hover {
      background: var(--color-accent);
      color: var(--color-secondary);
    }
    /* 导航 */
    #header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: white;
      height: var(--header-height);
      border-bottom: 1px solid var(--color-border);
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo {
      font-family: var(--font-heading);
      font-size: 24px;
      font-weight: 800;
      color: var(--color-primary);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo::after {
      content: '';
      display: block;
      width: 2px;
      height: 24px;
      background-color: var(--color-accent);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--color-secondary);
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--color-primary);
      transition: width 0.25s ease;
    }
    .nav-links a:hover {
      color: var(--color-primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--color-secondary);
      cursor: pointer;
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-title h2 {
      display: inline-block;
      position: relative;
    }
    .section-title h2::after {
      content: '';
      display: block;
      width: 60px;
      height: 3px;
      background: var(--color-accent);
      margin: 12px auto 0;
    }
    /* Hero */
    #hero {
      padding: 0;
      display: flex;
      min-height: 600px;
    }
    .hero-left {
      background: var(--color-secondary);
      background-image: linear-gradient(135deg, #1A1A1A 0%, rgba(200,16,46,0.7) 100%);
      flex: 5;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 80px 48px;
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero-left::before {
      content: '';
      position: absolute;
      bottom: 0;
      right: 0;
      width: 200px;
      height: 200px;
      background: radial-gradient(circle, rgba(212,175,55,0.25) 0%, transparent 70%);
      border-radius: 50%;
    }
    .hero-left h1 {
      color: white;
      margin-bottom: 16px;
      font-size: 48px;
    }
    .hero-subtitle {
      font-size: 20px;
      color: rgba(255,255,255,0.85);
      margin-bottom: 32px;
      font-weight: 400;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-right {
      flex: 7;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-right::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(90deg, rgba(245,240,232,0.15) 0%, transparent 50%);
    }
    /* Strengths 网格 */
    .strengths-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .strength-card {
      background: var(--color-card-bg);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(0,0,0,0.04);
      transition: all 0.3s;
    }
    .strength-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }
    .strength-icon {
      font-size: 36px;
      color: var(--color-accent);
      margin-bottom: 16px;
      width: 64px;
      height: 64px;
      line-height: 64px;
      border: 2px solid var(--color-accent);
      border-radius: 50%;
      display: inline-block;
    }
    .strength-card h3 {
      margin-bottom: 8px;
    }
    /* Services 瀑布 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--color-card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-card-hover);
    }
    .service-img {
      height: 220px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .service-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--color-primary);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.5px;
    }
    .service-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .service-body h3 {
      margin-bottom: 8px;
    }
    .service-body p {
      font-size: 15px;
      margin-bottom: 16px;
      flex: 1;
    }
    .service-link {
      color: var(--color-primary);
      font-weight: 600;
      font-size: 14px;
      align-self: flex-start;
      border-bottom: 1px solid transparent;
      transition: border 0.2s;
    }
    .service-link:hover {
      border-bottom: 1px solid var(--color-primary);
    }
    /* 对比表 */
    .comparison-wrapper {
      display: flex;
      align-items: center;
      gap: 24px;
      background: var(--color-card-bg);
      border-radius: var(--radius-card);
      padding: 40px;
      box-shadow: var(--shadow-card);
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(255,255,255,0.92);
    }
    .comp-col {
      flex: 1;
    }
    .comp-col h3 {
      margin-bottom: 24px;
      font-size: 22px;
    }
    .comp-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--color-border);
    }
    .left-col .comp-item span:last-child {
      color: var(--color-muted);
    }
    .right-col .comp-item span:last-child {
      color: var(--color-primary);
      font-weight: 600;
    }
    .vs-badge {
      background: var(--color-accent);
      color: var(--color-secondary);
      font-weight: 800;
      font-size: 20px;
      padding: 12px 16px;
      border-radius: 50%;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    }
    /* Numbers */
    .numbers-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .num-value {
      font-size: 48px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.2;
    }
    .num-label {
      font-size: 16px;
      color: var(--color-text-soft);
      margin-top: 8px;
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--color-border);
      background: var(--color-faq-bg);
      margin-bottom: 8px;
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 18px;
      font-weight: 600;
      text-align: left;
      color: var(--color-text);
    }
    .faq-icon {
      transition: transform 0.3s;
      font-size: 20px;
      color: var(--color-primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 24px;
      color: var(--color-text-soft);
      background: white;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 20px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    /* Contact */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .contact-form input, .contact-form select, .contact-form textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #CCC5B8;
      border-radius: var(--radius-input);
      margin-bottom: 16px;
      font-size: 16px;
      background: white;
      transition: border 0.2s;
    }
    .contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
      outline: none;
      border-color: var(--color-primary);
    }
    .contact-info {
      background: var(--color-card-bg);
      padding: 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
    }
    .map-placeholder {
      height: 180px;
      background: #e0dbd2;
      border-radius: 8px;
      margin-top: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-muted);
    }
    /* Footer */
    #footer {
      background: var(--color-secondary);
      color: #999;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: white;
    }
    .footer-links a {
      display: block;
      color: #aaa;
      margin-bottom: 8px;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: var(--color-accent);
    }
    .copyright {
      border-top: 1px solid #333;
      padding-top: 20px;
      text-align: center;
      font-size: 14px;
    }
    @media (max-width: 1024px) {
      .strengths-grid { grid-template-columns: repeat(2, 1fr); }
      .numbers-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      h1 { font-size: 32px; }
      .nav-links { display: none; }
      .menu-toggle { display: block; }
      #hero { flex-direction: column; }
      .hero-left { padding: 48px 24px; }
      .hero-right { height: 300px; }
      .services-grid { grid-template-columns: 1fr; }
      .comparison-wrapper { flex-direction: column; padding: 24px; }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }