/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-hover: #084298;
      --accent: #FF5E14;
      --accent-hover: #e04b06;
      --dark-surface: #111827;
      --dark-sub: #1F2937;
      --bg-light: #F8F9FA;
      --bg-white: #FFFFFF;
      --text-main: #1E293B;
      --text-body: #475569;
      --text-muted: #94A3B8;
      --border-color: #E2E8F0;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 24px rgba(10, 88, 202, 0.08);
      --transition: all 0.25s ease-in-out;
    }

    /* Reset & Base */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font: inherit;
    }

    /* Container & Layout */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section-padding {
      padding: 80px 0;
    }
    .bg-white-area {
      background-color: var(--bg-white);
    }
    .bg-light-area {
      background-color: var(--bg-light);
    }
    .bg-dark-area {
      background-color: var(--dark-surface);
      color: #F3F4F6;
    }

    /* Typography Utilities */
    .section-head {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-head.text-left {
      text-align: left;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background-color: rgba(10, 88, 202, 0.08);
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }
    .bg-dark-area .section-badge {
      background-color: rgba(255, 94, 20, 0.2);
      color: var(--accent);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .bg-dark-area .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-body);
      max-width: 780px;
      margin: 0 auto;
    }
    .bg-dark-area .section-desc {
      color: #9CA3AF;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      gap: 8px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 16px rgba(10, 88, 202, 0.25);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 16px rgba(255, 94, 20, 0.25);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* Top Bar */
    .top-bar {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 8px 0;
      border-bottom: 1px solid #1E293B;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-info span {
      margin-right: 20px;
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
    }
    .brand-logo-badge {
      background: var(--primary);
      color: #FFF;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-cta {
      display: flex;
      align-items: center;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero Section (预约到店/时段选择视觉) */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(10, 88, 202, 0.03) 0%, rgba(255, 94, 20, 0.03) 100%), #FFFFFF;
      padding: 70px 0 90px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.35rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-body);
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .hero-highlights {
      display: flex;
      gap: 20px;
      margin-bottom: 32px;
    }
    .hero-highlight-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--text-main);
      font-weight: 600;
    }
    .hero-highlight-item svg {
      width: 18px;
      height: 18px;
      fill: var(--accent);
    }
    /* Hero Booking Visual Card */
    .hero-booking-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-hover);
      position: relative;
    }
    .hero-booking-card h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .hero-booking-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .slot-picker {
      margin-bottom: 20px;
    }
    .slot-picker-title {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .slots-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }
    .slot-btn {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      padding: 10px 6px;
      text-align: center;
      font-size: 0.8rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }
    .slot-btn.active {
      background: rgba(10, 88, 202, 0.1);
      border-color: var(--primary);
      color: var(--primary);
      font-weight: 600;
    }
    .slot-btn:hover {
      border-color: var(--primary);
    }
    .booking-inputs {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 20px;
    }
    .booking-inputs input, .booking-inputs select {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.9rem;
      outline: none;
    }
    .booking-inputs input:focus, .booking-inputs select:focus {
      border-color: var(--primary);
    }

    /* Common Card Grid (3 Cols) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    /* 2. About Section */
    .about-media-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .about-text-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }
    .about-text-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .about-text-item-icon {
      background: rgba(10, 88, 202, 0.1);
      color: var(--primary);
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
      font-size: 0.85rem;
    }

    /* 3. Strengths Section (6 Cards) */
    .strength-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .strength-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
    }
    .strength-icon {
      width: 48px;
      height: 48px;
      background: rgba(10, 88, 202, 0.08);
      color: var(--primary);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .strength-icon svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }
    .strength-card h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .strength-card p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 4. Solutions Cards */
    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      position: relative;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .solution-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 8px 30px rgba(10, 88, 202, 0.12);
    }
    .solution-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--accent);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 16px;
      border-radius: 20px;
      text-transform: uppercase;
    }
    .solution-card h3 {
      font-size: 1.3rem;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .solution-card p.sub {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 42px;
    }
    .solution-features {
      list-style: none;
      margin-bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      flex-grow: 1;
    }
    .solution-features li {
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-main);
    }
    .solution-features li svg {
      width: 16px;
      height: 16px;
      fill: var(--primary);
      flex-shrink: 0;
    }

    /* 5. Philosophy / Technical Parameters (Dark Section) */
    .dark-card {
      background: var(--dark-sub);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      padding: 30px;
    }
    .comparison-row {
      display: flex;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .comparison-row:last-child {
      border-bottom: none;
    }
    .param-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 15px;
    }
    .param-table th, .param-table td {
      padding: 12px 16px;
      text-align: left;
      font-size: 0.875rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .param-table th {
      color: var(--accent);
      font-weight: 600;
    }

    /* 6. Stories Section */
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .story-img-wrap {
      height: 200px;
      overflow: hidden;
    }
    .story-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .story-card:hover .story-img-wrap img {
      transform: scale(1.05);
    }
    .story-body {
      padding: 24px;
      flex-grow: 1;
    }
    .story-tag {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .story-body h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    /* 7. Stats Bar */
    .stats-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .stat-item {
      text-align: center;
      position: relative;
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-body);
      font-weight: 500;
    }

    /* 8. Reviews Section */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      margin-bottom: 12px;
      display: flex;
      gap: 2px;
    }
    .review-comment {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .review-name {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .review-title {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 9. Insights / Blog */
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .insight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .insight-content {
      padding: 24px;
    }
    .insight-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .insight-content h3 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-content p {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 10. Native FAQ (Details/Summary) */
    .faq-container {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-item summary {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      line-height: 1;
    }
    .faq-item[open] summary::after {
      content: "−";
    }
    .faq-content {
      padding: 0 24px 20px;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 11. Guarantee Bar */
    .guarantee-bar {
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
      background: #FFFFFF;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 44px;
      height: 44px;
      background: rgba(10, 88, 202, 0.06);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .guarantee-icon svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }
    .guarantee-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .guarantee-desc {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 12. Final Trial Section */
    .trial-box {
      background: linear-gradient(135deg, #0A58CA 0%, #084298 100%);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .trial-box h2 {
      font-size: 2rem;
      margin-bottom: 16px;
      font-weight: 800;
    }
    .trial-box p {
      font-size: 1rem;
      color: #E2E8F0;
      margin-bottom: 24px;
      line-height: 1.6;
    }
    .trial-form {
      background: #FFFFFF;
      padding: 30px;
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .trial-form input, .trial-form select {
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.9rem;
      color: var(--text-main);
      outline: none;
    }
    .trial-form input:focus, .trial-form select:focus {
      border-color: var(--primary);
    }

    /* Footer */
    .site-footer {
      background-color: #0B0F19;
      color: #94A3B8;
      padding: 60px 0 30px;
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      text-align: center;
      font-size: 0.8125rem;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-grid, .trial-box {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .section-padding {
        padding: 48px 0;
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .nav-menu, .nav-cta {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .slots-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .trial-box {
        padding: 30px 20px;
      }
      .hero-content h1 {
        font-size: 1.85rem;
      }
    }