/* ===== Dark Theme - TradeCloser AI v2 ===== */
/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #c9d1d9;
    background: #0d1117;
}

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

a {
    color: #58a6ff;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #79c0ff;
}

h1, h2, h3, h4 {
    font-weight: 800;
    line-height: 1.3;
    color: #f0f6fc;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.8rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.15rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid #30363d;
    color: #c9d1d9;
}

.btn-outline:hover {
    background: #21262d;
    border-color: #58a6ff;
    color: #fff;
}

.btn-accent {
    background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    color: #fff;
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(168, 85, 247, 0.4);
    color: #fff;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

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

/* Navbar */
.navbar {
    background: #0d1117;
    border-bottom: 1px solid #21262d;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #f0f6fc;
}

.logo-img {
    height: 36px;
    width: auto;
}

.logo-text {
    margin-left: 8px;
    font-size: 1.3rem;
    font-weight: 700;
    color: #f0f6fc;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    color: #c9d1d9;
    font-weight: 500;
    font-size: 1.15rem;
    padding: 8px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #58a6ff;
}

.nav-cta .btn-nav {
    padding: 12px 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
    font-weight: 600;
    font-size: 1.2rem;
}

/* Hero Section */
.hero {
    background: #0d1117;
    color: #f0f6fc;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -150px;
    right: 15%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(168,85,247,0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-title {
    font-size: 3.2rem;
    color: #f0f6fc;
    margin-bottom: 20px;
}

.highlight {
    background: linear-gradient(135deg, #58a6ff 0%, #a78bfa 50%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.3px rgba(255,255,255,0.15);
    background-clip: text;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #58a6ff 0%, #a78bfa 50%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.3px rgba(255,255,255,0.15);
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #8b949e;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.hero-cta .btn-outline {
    border-color: #30363d;
    color: #c9d1d9;
}

.hero-cta .btn-outline:hover {
    border-color: #58a6ff;
    color: #fff;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #58a6ff;
}

.stat-label {
    font-size: 0.9rem;
    color: #8b949e;
}

/* Sponsor CTA */
.sponsor-cta {
    padding: 60px 0;
    background: #0d1117;
}

.sponsor-card {
    background: linear-gradient(135deg, #161b22 0%, #1c2333 100%);
    border: 1px solid #21262d;
    padding: 48px;
    border-radius: 16px;
    text-align: center;
}

.sponsor-card h2 {
    margin-bottom: 16px;
}

.sponsor-card p {
    font-size: 1.1rem;
    color: #8b949e;
    margin-bottom: 24px;
}

/* Section Styles */
.section-title {
    text-align: center;
    font-size: 3.2rem;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: #8b949e;
    font-size: 1.1rem;
    margin-bottom: 48px;
}

/* Agent Grid */
.agents-overview {
    padding: 80px 0;
    background: #0d1117;
}

.agent-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.agent-card {
    background: #161b22;
    border: 1px solid #21262d;
    padding: 32px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
}

.agent-card:hover {
    transform: translateY(-4px);
    border-color: #58a6ff;
}

.agent-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.agent-card h3 {
    margin-bottom: 12px;
}

.agent-card p {
    color: #8b949e;
    margin-bottom: 16px;
}

.agent-link {
    font-weight: 600;
    color: #58a6ff;
}

/* Pain Points */
.pain-points {
    padding: 80px 0;
    background: #161b22;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.pain-item {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 32px;
    border-radius: 12px;
}

.pain-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.pain-item h3 {
    margin-bottom: 12px;
}

.pain-item p {
    color: #8b949e;
}

/* Solution Preview */
.solution-preview {
    padding: 80px 0;
    background: #0d1117;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.solution-item {
    padding: 24px;
    background: #161b22;
    border-radius: 12px;
    border-left: 4px solid #58a6ff;
}

.solution-item h3 {
    margin-bottom: 8px;
}

.solution-item p {
    color: #8b949e;
}

/* Pricing Preview */
.pricing-preview {
    padding: 80px 0;
    background: #161b22;
}

.pricing-preview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.pricing-preview-item {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 32px;
    border-radius: 12px;
    text-align: center;
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}

.pricing-preview-item:hover {
    transform: translateY(-4px);
    border-color: #58a6ff;
}

.pricing-preview-item.featured {
    border-color: #6366f1;
}

.popular-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-preview-item h3 {
    margin-bottom: 12px;
}

.pricing-preview-item .price {
    font-size: 2rem;
    font-weight: 700;
    color: #58a6ff;
    margin-bottom: 8px;
}

.pricing-preview-item .price span {
    font-size: 1rem;
    color: #8b949e;
    font-weight: 400;
}

.pricing-preview-item p {
    color: #8b949e;
    margin-bottom: 16px;
}

.pricing-link {
    font-weight: 600;
    color: #58a6ff;
}

/* Founder Preview */
.founder-preview {
    padding: 80px 0;
    background: #0d1117;
}

.founder-card {
    background: linear-gradient(135deg, #161b22 0%, #1c2333 100%);
    border: 1px solid #21262d;
    border-radius: 16px;
    padding: 60px;
    text-align: center;
}

.founder-card h2 {
    margin-bottom: 16px;
}

.founder-card p {
    font-size: 1.2rem;
    color: #8b949e;
    margin-bottom: 24px;
}

/* Final CTA */
.final-cta {
    padding: 80px 0;
    background: #161b22;
    text-align: center;
}

.final-cta h2 {
    margin-bottom: 16px;
}

.final-cta p {
    font-size: 1.2rem;
    color: #8b949e;
    margin-bottom: 32px;
}

/* Footer */
.footer {
    background: #0d1117;
    border-top: 1px solid #21262d;
    color: #c9d1d9;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: #f0f6fc;
    margin-bottom: 16px;
}

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

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a {
    color: #8b949e;
}

.footer-col a:hover {
    color: #58a6ff;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #21262d;
    color: #484f58;
}

/* Page Header */
.page-header {
    background: #0d1117;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 1.2rem;
    color: #8b949e;
}

/* Pricing Page */
.pricing-header {
    padding: 60px 0;
    text-align: center;
    background: #161b22;
}

.pricing-subtitle {
    font-size: 1.2rem;
    color: #8b949e;
}

.pricing-plans {
    padding: 60px 0;
    background: #0d1117;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-bottom: 40px;
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
}

.pricing-card {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 16px;
    padding: 32px;
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}

.pricing-card:hover {
    transform: translateY(-4px);
    border-color: #58a6ff;
}

.pricing-card.featured {
    border-color: #6366f1;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.2);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #21262d;
    color: #8b949e;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.featured-badge {
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
}

.pricing-card h3 {
    margin-bottom: 16px;
}

.pricing-price {
    margin-bottom: 8px;
}

.price-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: #58a6ff;
}

.price-period {
    color: #8b949e;
    font-size: 1rem;
}

.pricing-desc {
    color: #8b949e;
    margin-bottom: 24px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #c9d1d9;
}

.feature-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.8rem;
}

.feature-included .feature-icon {
    background: #1a3a2a;
    color: #3fb950;
}

.feature-excluded .feature-icon {
    background: #3a1a1a;
    color: #f85149;
}

.feature-excluded {
    opacity: 0.5;
}

/* Credits Section */
.credits-section {
    padding: 80px 0;
    background: #161b22;
}

.credits-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
}

.credits-info h3 {
    margin-bottom: 16px;
}

.credits-info h4 {
    margin: 24px 0 12px;
}

.credits-list {
    list-style: none;
}

.credits-list li {
    padding: 8px 0;
    color: #c9d1d9;
}

.credits-ratio {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 20px;
    border-radius: 12px;
    border-left: 4px solid #58a6ff;
    margin-bottom: 16px;
}

.credits-example {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 20px;
    border-radius: 12px;
    margin-top: 16px;
}

.highlight-card {
    background: linear-gradient(135deg, #1c2333 0%, #252d3d 100%);
    border: 1px solid #21262d;
    padding: 32px;
    border-radius: 16px;
}

.highlight-card h3 {
    margin-bottom: 16px;
}

.highlight-card ul {
    list-style: none;
    margin-bottom: 24px;
}

.highlight-card li {
    padding: 8px 0;
    color: #c9d1d9;
}

/* Comparison Table */
.comparison-section {
    padding: 80px 0;
    background: #0d1117;
}

.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid #21262d;
    color: #c9d1d9;
}

.comparison-table th {
    background: #161b22;
    font-weight: 600;
    color: #f0f6fc;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
}

/* FAQ Section */
.faq-section {
    padding: 80px 0;
    background: #161b22;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.value-intro .value-card-link {
    display: inline-block;
    margin-top: 16px;
    font-size: 0.9rem;
    color: #58a6ff;
    text-decoration: none;
}

.value-intro .value-card-link:hover {
    color: #79c0ff;
}

.faq-item {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.faq-item h3 {
    margin-bottom: 12px;
}

.faq-item p {
    color: #8b949e;
}

/* Features Detail */
.features-detail {
    padding: 60px 0;
    background: #0d1117;
}

.feature-block {
    margin-bottom: 80px;
}

.feature-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 40px;
    align-items: start;
}

.feature-icon-large {
    font-size: 4rem;
}

.feature-tagline {
    font-size: 1.2rem;
    color: #8b949e;
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
    margin-bottom: 32px;
}

.feature-list li {
    padding: 12px 0;
    border-bottom: 1px solid #21262d;
    color: #c9d1d9;
}

.feature-list li:last-child {
    border-bottom: none;
}

.scenarios {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.scenario {
    background: #161b22;
    border: 1px solid #21262d;
    padding: 20px;
    border-radius: 12px;
}

.scenario h4 {
    margin-bottom: 8px;
    color: #58a6ff;
}

/* Solutions Grid */
.solutions-grid {
    padding: 60px 0;
    background: #161b22;
}

.solution-card {
    background: #0d1117;
    border: 1px solid #21262d;
    border-radius: 16px;
    margin-bottom: 32px;
    overflow: hidden;
}

.solution-card.featured {
    border-color: #6366f1;
}

.solution-header {
    background: #161b22;
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.solution-icon {
    font-size: 2.5rem;
}

.solution-body {
    padding: 32px;
}

.pain-list {
    list-style: none;
    margin-bottom: 24px;
}

.pain-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: #c9d1d9;
}

.pain-list li::before {
    content: '';
    position: absolute;
    left: 0;
}

.solution-list {
    list-style: none;
    margin-bottom: 24px;
}

.solution-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: #c9d1d9;
}

.solution-list li::before {
    content: '✅';
    position: absolute;
    left: 0;
}

.agents-used {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.agent-tag {
    background: #1c2333;
    color: #58a6ff;
    border: 1px solid #21262d;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* Cases Grid */
.cases-grid {
    padding: 60px 0;
    background: #0d1117;
}

.case-card {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
}

.case-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.case-avatar {
    font-size: 2.5rem;
}

.case-role {
    color: #8b949e;
    font-size: 0.9rem;
}

.case-content h4 {
    color: #58a6ff;
    margin-bottom: 12px;
    margin-top: 20px;
}

.case-content h4:first-child {
    margin-top: 0;
}

.case-content p {
    color: #c9d1d9;
}

.case-results {
    display: flex;
    gap: 32px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #21262d;
}

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

.result-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #58a6ff;
}

.result-label {
    color: #8b949e;
    font-size: 0.9rem;
}

.case-cta {
    padding: 60px 0;
    background: #161b22;
    text-align: center;
}

/* Blog Grid */
.blog-grid {
    padding: 60px 0;
    background: #161b22;
}

.blog-featured {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    background: #0d1117;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #21262d;
    margin-bottom: 48px;
}

.blog-featured .blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-featured .blog-content {
    padding: 32px;
}

.blog-tag {
    display: inline-block;
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.blog-featured h2 {
    margin-bottom: 16px;
}

.blog-featured h2 a {
    color: #f0f6fc;
}

.blog-featured h2 a:hover {
    color: #58a6ff;
}

.blog-excerpt {
    color: #8b949e;
    margin-bottom: 16px;
}

.blog-meta {
    color: #484f58;
    font-size: 0.9rem;
}

.blog-list {
    display: grid;
    gap: 24px;
}

.blog-card {
    background: #0d1117;
    border: 1px solid #21262d;
    border-radius: 12px;
    padding: 24px;
    transition: transform 0.3s, border-color 0.3s;
}

.blog-card:hover {
    transform: translateY(-2px);
    border-color: #58a6ff;
}

.blog-card h3 {
    margin-bottom: 12px;
}

.blog-card h3 a {
    color: #f0f6fc;
}

.blog-card h3 a:hover {
    color: #58a6ff;
}

.blog-card p {
    color: #8b949e;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
}

.page-link {
    padding: 8px 16px;
    border: 1px solid #21262d;
    border-radius: 8px;
    color: #8b949e;
    background: #0d1117;
}

.page-link:hover,
.page-link.active {
    background: #58a6ff;
    color: #fff;
    border-color: #58a6ff;
}

.page-dots {
    padding: 8px;
    color: #484f58;
}

.newsletter {
    padding: 60px 0;
    background: #0d1117;
    text-align: center;
}

.newsletter h2 {
    margin-bottom: 12px;
}

.newsletter p {
    color: #8b949e;
    margin-bottom: 24px;
}

.newsletter-form {
    display: flex;
    gap: 12px;
    max-width: 400px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #21262d;
    border-radius: 8px;
    font-size: 1rem;
    background: #161b22;
    color: #c9d1d9;
}

.newsletter-form input:focus {
    outline: none;
    border-color: #58a6ff;
}

/* About Page - Founder Story */
.founder-story {
    padding: 60px 0;
    background: #0d1117;
}

.story-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-content h2 {
    text-align: center;
    margin-bottom: 48px;
}

.story-timeline {
    position: relative;
    padding-left: 40px;
}

.story-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #58a6ff 0%, #a78bfa 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -46px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, #58a6ff 0%, #a78bfa 100%);
}

.timeline-year {
    font-size: 1.2rem;
    font-weight: 700;
    color: #58a6ff;
    margin-bottom: 8px;
}

.timeline-content h3 {
    margin-bottom: 8px;
}

.timeline-content p {
    color: #8b949e;
}

/* Mission */
.mission {
    padding: 80px 0;
    background: #161b22;
    text-align: center;
}

.mission h2 {
    margin-bottom: 48px;
}

.mission-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.mission-card {
    background: #0d1117;
    border: 1px solid #21262d;
    padding: 40px;
    border-radius: 16px;
}

.mission-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.mission-card h3 {
    margin-bottom: 12px;
}

.mission-card p {
    color: #8b949e;
}

/* Sponsor Program */
.sponsor-program {
    padding: 80px 0;
    background: #0d1117;
}

.sponsor-program h2 {
    text-align: center;
    margin-bottom: 16px;
}

.sponsor-subtitle {
    text-align: center;
    color: #8b949e;
    font-size: 1.1rem;
    margin-bottom: 48px;
}

.sponsor-content {
    max-width: 800px;
    margin: 0 auto;
}

.sponsor-intro h3 {
    margin-bottom: 16px;
    margin-top: 32px;
}

.sponsor-intro h3:first-child {
    margin-top: 0;
}

.sponsor-perks {
    list-style: none;
}

.sponsor-perks li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid #21262d;
    color: #c9d1d9;
}

.sponsor-perks li:last-child {
    border-bottom: none;
}

.perk-icon {
    font-size: 1.5rem;
}

.sponsor-requirements {
    list-style: none;
}

.sponsor-requirements li {
    padding: 8px 0;
    color: #c9d1d9;
}

.sponsor-cta {
    text-align: center;
    margin-top: 40px;
    padding: 32px;
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 16px;
}

.sponsor-cta p {
    margin-bottom: 16px;
    color: #c9d1d9;
}

/* ===== Platform Features Section ===== */
.platform-features {
    padding: 100px 0;
    background: #0d1117;
}

.platform-features .section-title {
    text-align: center;
    margin-bottom: 12px;
}

.platform-features .section-subtitle {
    text-align: center;
    color: #8b949e;
    font-size: 1.1rem;
    margin-bottom: 60px;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.platform-card {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 16px;
    padding: 40px 32px;
    transition: all 0.3s;
}

.platform-card:hover {
    border-color: #58a6ff;
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.platform-card h3 {
    font-size: 1.2rem;
    color: #f0f6fc;
    margin-bottom: 12px;
}

.platform-card > p {

    padding: 0;
}


.feature-card-img {
    width: 100%;
    border-radius: 12px;
    margin-top: 16px;
    margin-bottom: 24px;
    border: 1px solid #21262d;
    object-fit: cover;
    max-height: 260px;
    transition: all 0.3s;
}

.feature-card-img:hover {
    border-color: #58a6ff;
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.2);
}
.platform-highlights li {
    color: #c9d1d9;
    padding: 6px 0;
    font-size: 1.15rem;
}

/* Feature section divider */
.feature-section-divider {
    text-align: center;
    padding: 80px 0 40px;
    border-top: 1px solid #21262d;
    margin-top: 60px;
}

.feature-section-divider h2 {
    font-size: 2rem;
    color: #f0f6fc;
    margin-bottom: 12px;
}

.feature-section-divider p {
    color: #8b949e;
    font-size: 1.1rem;
}

/* Responsive */

.pricing-preview-item a { text-decoration: none; color: inherit; }
.pricing-preview-item .price a { text-decoration: none; color: inherit; display: block; }


.price-link { text-decoration: none; color: inherit; }
.price-link:hover { text-decoration: underline; }


/* 汉堡按钮 - 默认隐藏，移动端显示 */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.hamburger-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #c9d1d9;
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}
.hamburger-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger-btn.active span:nth-child(2) {
    opacity: 0;
}
.hamburger-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    h1, h2 {
        font-size: 2rem;
        line-height: 1.6;
    }
    .founder-card {
        padding: 30px 20px;
    }

    .hamburger-btn {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #0d1117;
        border-bottom: 1px solid #21262d;
        padding: 16px 20px;
        gap: 8px;
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-menu li {
        border-bottom: 1px solid #21262d;
    }
    .nav-menu li:last-child {
        border-bottom: none;
    }
    .nav-menu a {
        display: block;
        padding: 12px 0;
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    
    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 16px 32px;
    }
    .hero-stats .stat {
        flex: 0 0 calc(50% - 16px);
    }
    
    .agent-grid,
    .pricing-grid,
    .pricing-preview-grid,
    .pain-grid,
    .solution-grid,
    .mission-cards,
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .credits-content {
        grid-template-columns: 1fr;
    }
    
    .feature-content {
        grid-template-columns: 1fr;
    }
    
    .scenarios {
        grid-template-columns: 1fr;
    }
    
    .blog-featured {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.hero-product-img {
    width: 80%;
    max-width: 700px;
    border-radius: 12px;
    margin: 30px auto 0;
    display: block;
    border: 1px solid #21262d;
    box-shadow: 0 8px 40px rgba(88, 166, 255, 0.1);
    transition: all 0.3s;
}

.hero-product-img:hover {
    border-color: #58a6ff;
    box-shadow: 0 12px 48px rgba(88, 166, 255, 0.2);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .hero-product-img {
        width: 95%;
        margin-top: 20px;
    }
}

/* 产品价值 Intro */
.value-intro {
    padding: 80px 0;
    background: #0d1117;
    text-align: center;
}

.value-intro .value-desc {
    font-size: 1.15rem;
    color: #c9d1d9;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 40px;
}

.value-intro .value-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 40px;
}

@media (max-width: 768px) {
    .value-intro .value-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}
.value-intro .value-card {
    background: #161b22;
    border: 1px solid #21262d;
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    transition: all 0.3s;
}

.value-intro .value-card:hover {
    border-color: #30363d;
    transform: translateY(-2px);
}

.value-intro .value-card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.value-intro .value-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #f0f6fc;
    margin-bottom: 12px;
}

.value-intro .value-card p {
    font-size: 0.9rem;
    color: #8b949e;
    line-height: 1.6;
    margin: 0;
}

.value-intro .value-highlight {
    font-size: 1.15rem;
    color: #8b949e;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}