/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-brand a {
    text-decoration: none;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-headline {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subheadline {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta,
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-trust {
    margin-top: 1.5rem;
    color: #e5e7eb;
}

/* Buttons */
.btn,
.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Problem Section */
.problem-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.problem-grid {
    display: grid;
    /* 建议使用 minmax(250px, 1fr) 以便在 1200px 屏幕下完美并排 4 个卡片 */
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); 
    gap: 2rem;
}

.problem-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.problem-card p {
    color: var(--text-light);
}

/* Solution Section Layout */
.solution-section {
    padding: 6rem 0;
    background-color: #f8fafc;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

/* Card Styling */
.solution-card {
    background: #ffffff;
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 特别突出中间的卡片 */
.featured-card {
    border: 2px solid #2563eb;
    position: relative;
}

/* Header Styling */
.card-header {
    margin-bottom: 1.5rem;
    position: relative;
}

.card-number {
    font-size: 0.875rem;
    font-weight: 800;
    color: #2563eb;
    background: #eff6ff;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    display: inline-block;
    margin-bottom: 1rem;
}

.card-header h3 {
    font-size: 1.75rem;
    color: #1e2937;
    margin-bottom: 0.25rem;
}

.card-subtitle {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Body & List Styling */
.card-body p {
    color: #475569;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.card-list {
    list-style: none;
    padding: 0;
    margin-top: auto;
}

.card-list li {
    padding-left: 1.75rem;
    position: relative;
    margin-bottom: 0.75rem;
    color: #334155;
    font-size: 0.95rem;
    line-height: 1.4;
}

/* 自定义绿色的勾选图标 */
.card-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: 900;
}

.card-list li strong {
    color: #1e2937;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .solution-grid {
        grid-template-columns: 1fr;
    }
}

/* Pricing Section */
.pricing-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.08) translateY(-5px);
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 1rem 0;
}

.price-desc {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin: 2rem 0;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* Trust Section */
.trust-section {
    padding: 4rem 0;
    background: white;
}

.trust-badges,
.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    text-align: center;
}

.trust-badge,
.trust-card {
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.trust-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.trust-badge h4,
.trust-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.trust-badge p,
.trust-card p {
    color: var(--text-light);
}

/* Contact Section */
.contact-section {
    padding: 5rem 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #25d366;
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.whatsapp-btn:hover {
    background: #20ba5a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Chat Widget */
.chat-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.chat-button {
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    font-size: 1.5rem;
    transition: all 0.3s;
    animation: pulse 2s infinite;
}

.chat-button:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 25px -5px rgba(0, 0, 0, 0.3);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(37, 211, 102, 0);
    }
}

/* Service Pages */
.service-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.service-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.service-subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
}

.service-content {
    padding: 4rem 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.main-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.main-content h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--text-dark);
}

.main-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.check-list {
    margin: 2rem 0;
}

.check-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
}

.check-icon {
    width: 30px;
    height: 30px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.check-item h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.deliverables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.deliverable-card {
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.deliverable-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

/* Comparison table (Reality View) */
.comparison-table {
    margin: 2rem 0;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    min-width: 320px;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

.comparison-table thead th {
    background: var(--text-dark);
    color: white;
    font-weight: 600;
}

.comparison-table th:nth-child(1),
.comparison-table td:nth-child(1) {
    width: 28%;
    min-width: 100px;
}

.comparison-table th:nth-child(2),
.comparison-table td:nth-child(2) {
    width: 36%;
}

.comparison-table th:nth-child(3),
.comparison-table td:nth-child(3) {
    width: 36%;
}

.comparison-table tbody tr:nth-child(even) {
    background: var(--bg-light);
}

.comparison-table .red-text {
    color: #b91c1c;
}

.comparison-table .green-text {
    color: #047857;
    font-weight: 500;
}

/* Deliverables grid (Reality View / Safety Shield) */
.deliverables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.deliv-card {
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.deliv-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.deliv-card p {
    color: var(--text-light);
    margin: 0;
    line-height: 1.6;
}

/* 优化后的 CTA 区域布局 */
.cta-box {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%); /* 更具活力的渐变色 */
    padding: 4rem 2rem;
    border-radius: 1.5rem; /* 圆角更圆润，符合现代审美 */
    text-align: center;
    margin-top: 3rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15); /* 增加阴影，使其悬浮感更强 */
}

.cta-box h3 {
    font-size: 2.5rem;
    color: #ffffff; /* 必须是纯白 */
    margin-bottom: 1.2rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2); /* 增加微弱投影，提升文字清晰度 */
}

.cta-box p {
    color: rgba(255, 255, 255, 0.9); /* 半透明白色，增加层次感 */
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* 按钮优化：使其从背景中跳出来 */
.cta-box .btn-primary {
    background-color: #ffffff; /* 使用纯白按钮 */
    color: #4f46e5; /* 文字使用渐变的主色调 */
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.cta-box .btn-primary:hover {
    transform: translateY(-3px); /* 悬停上浮效果 */
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background-color: #f8fafc;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

.sidebar-card h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.sidebar-card ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.sidebar-card ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

/* Report Page */
.report-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.report-subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
    margin-top: 1rem;
}

.report-content {
    padding: 4rem 0;
    background: var(--bg-light);
}

.report-wrapper {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.report-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.report-info p {
    margin: 0.5rem 0;
    color: var(--text-light);
}

.status-badge {
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.status-badge.warning {
    background: #fef3c7;
    color: #92400e;
}

.key-finding {
    background: #fef2f2;
    border: 2px solid var(--danger-color);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
}

.key-finding h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.finding-comparison {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.comparison-item {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 0.5rem;
}

.comparison-item.claim {
    border: 2px solid var(--border-color);
}

.comparison-item.reality {
    border: 2px solid var(--danger-color);
}

.comparison-item h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.comparison-value {
    font-size: 2rem;
    font-weight: bold;
    margin: 1rem 0;
}

.comparison-value.red-flag {
    color: var(--danger-color);
}

.comparison-arrow {
    font-size: 2rem;
    color: var(--text-light);
}

.finding-note {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin-top: 1.5rem;
}

.finding-note p {
    color: var(--text-dark);
    line-height: 1.8;
}

.report-sections {
    margin: 3rem 0;
}

.report-section {
    margin-bottom: 2.5rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 0.5rem;
}

.report-section h3 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.section-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.section-status.green {
    background: #d1fae5;
    color: #065f46;
}

.section-status.red {
    background: #fee2e2;
    color: #991b1b;
}

.section-status.yellow {
    background: #fef3c7;
    color: #92400e;
}

.section-content {
    margin-top: 1.5rem;
}

.section-content p {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.section-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.section-content li {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.verification-box {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

.verification-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.verification-item:last-child {
    border-bottom: none;
}

.value {
    font-weight: 600;
    color: var(--text-dark);
}

.value.red {
    color: var(--danger-color);
}

.warning-text {
    background: #fef3c7;
    padding: 1rem;
    border-left: 4px solid var(--warning-color);
    border-radius: 0.25rem;
    margin-top: 1rem;
}

.risk-summary {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.risk-item {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.risk-item.high {
    background: #fee2e2;
    border: 2px solid var(--danger-color);
}

.risk-item.medium {
    background: #fef3c7;
    border: 2px solid var(--warning-color);
}

.risk-item.low {
    background: #d1fae5;
    border: 2px solid var(--secondary-color);
}

.risk-label {
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.risk-count {
    font-size: 2rem;
    font-weight: bold;
}

.recommendation-box {
    background: #eff6ff;
    border: 2px solid var(--primary-color);
    border-radius: 0.5rem;
    padding: 2rem;
    margin-top: 2rem;
}

.recommendation-box h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.recommendation-box p {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.recommendation-box ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.recommendation-box li {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.report-cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 1rem;
    text-align: center;
    margin-top: 3rem;
}

.report-cta h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.report-cta p {
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* About Section 优化 */
.about-section {
    padding: 8rem 0;
    background-color: #ffffff;
    border-top: 1px solid #f1f5f9;
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.section-headline {
    font-size: 2.5rem;
    color: #0f172a;
    margin-bottom: 1.5rem;
    position: relative;
}

/* 标题下方的装饰短线，增加专业感 */
.section-headline::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: #2563eb;
    margin-top: 10px;
}

.about-lead {
    font-size: 1.25rem;
    color: #334155;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: #64748b;
    line-height: 1.8;
}

/* 独立性承诺网格 */
.independence-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.independence-card {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 1rem;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.independence-card:hover {
    background: #ffffff;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: scale(1.02);
}

.card-icon {
    width: 40px;
    height: 40px;
    background: #fee2e2;
    color: #ef4444;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

/* 最后一个卡片高亮显示，强调“公正” */
.highlight-card {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.highlight-card .card-icon {
    background: #2563eb;
    color: #ffffff;
}

.independence-card h4 {
    color: #0f172a;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.independence-card p {
    color: #64748b;
    font-size: 0.95rem;
    margin: 0;
}

/* Topic Section Upgrade */

.text-center {
    text-align: center;
}

.topic-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 40px 0;
}

.topic-pill {
    padding: 12px 20px;
    border-radius: 30px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    text-decoration: none;
    font-weight: 500;
    color: #111827;
    transition: all 0.2s ease;
}

.topic-pill:hover {
    background: #111827;
    color: #ffffff;
}

.topic-description {
    max-width: 700px;
    margin: 0 auto 20px auto;
    color: #4b5563;
}

.cta-clean {
    padding-top: 60px;
    padding-bottom: 60px;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}


/* 响应式调整 */
@media (max-width: 992px) {
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-headline {
        font-size: 2rem;
    }

    .hero-subheadline {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .finding-comparison {
        flex-direction: column;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .report-header {
        flex-direction: column;
        gap: 1rem;
    }

    .report-wrapper {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0;
    }

    .hero-headline {
        font-size: 1.75rem;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .chat-widget {
        bottom: 1rem;
        right: 1rem;
    }

    .chat-button {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}