/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-600: #525252;
    --color-gray-800: #262626;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--color-white);
    color: var(--color-black);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 按钮样式 */
button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.btn-primary:hover {
    background-color: var(--color-gray-800);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
}

.btn-secondary:hover {
    border-color: var(--color-black);
}

.btn-large-primary {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: center;
}

.btn-large-primary:hover {
    background-color: var(--color-gray-800);
}

.btn-large-secondary {
    background-color: transparent;
    color: var(--color-black);
    padding: 1rem 2.5rem;
    border: 2px solid var(--color-black);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: center;
}

.btn-large-secondary:hover {
    background-color: var(--color-gray-50);
}

.btn-export {
    background-color: var(--color-white);
    color: var(--color-black);
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    font-size: 0.85rem;
}

.btn-view {
    background-color: transparent;
    color: var(--color-black);
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--color-black);
    border-radius: 4px;
    font-size: 0.8rem;
    margin-left: auto;
}

/* Header 导航栏 */
.header {
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    background-color: var(--color-white);
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    text-decoration: none;
    color: var(--color-black);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
    cursor: pointer;
    transition: opacity 0.2s;
}

.logo h1:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--color-black);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: var(--color-gray-600);
}

.nav-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-actions a {
    text-decoration: none;
}

/* Hero 区域 */
.hero {
    padding: var(--spacing-2xl) 0 var(--spacing-lg) 0;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-black);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* AI模型轮播效果 */
.ai-model-carousel {
    display: inline-block;
    height: 1.5em;
    line-height: 1.5em;
    position: relative;
    overflow: hidden;
    vertical-align: middle;
    font-weight: 700;
    color: var(--color-black);
    min-width: 120px;
    text-align: center;
}

.ai-model-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1.5em;
    opacity: 0;
    animation: fadeInOut 16s infinite;
}

.ai-model-item:nth-child(1) { animation-delay: 0s; }
.ai-model-item:nth-child(2) { animation-delay: 2s; }
.ai-model-item:nth-child(3) { animation-delay: 4s; }
.ai-model-item:nth-child(4) { animation-delay: 6s; }
.ai-model-item:nth-child(5) { animation-delay: 8s; }
.ai-model-item:nth-child(6) { animation-delay: 10s; }
.ai-model-item:nth-child(7) { animation-delay: 12s; }
.ai-model-item:nth-child(8) { animation-delay: 14s; }

@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    5%, 10% {
        opacity: 1;
        transform: translateY(0);
    }
    12.5% {
        opacity: 0;
        transform: translateY(-20px);
    }
    100% {
        opacity: 0;
        transform: translateY(-20px);
    }
}

.hero-metrics {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.metric-badge {
    padding: 0.5rem 1.2rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-3xl);
}

/* 仪表板预览 */
.dashboard-preview {
    border: 2px solid var(--color-black);
    border-radius: 12px;
    overflow: hidden;
    margin-top: var(--spacing-3xl);
    background-color: var(--color-white);
}

.dashboard-header {
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-md);
}

.dashboard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.dashboard-filters {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.filter-select {
    padding: 0.4rem 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    background-color: var(--color-white);
    font-size: 0.85rem;
}

.dashboard-content {
    display: flex;
    min-height: 600px;
}

.dashboard-sidebar {
    width: 200px;
    border-right: 1px solid var(--color-gray-200);
    padding: var(--spacing-lg);
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    padding: 0.5rem 0;
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.2s;
}

.sidebar-menu li:hover {
    color: var(--color-gray-600);
}

.sidebar-menu li.active {
    font-weight: 600;
}

.dashboard-main {
    flex: 1;
    padding: var(--spacing-xl);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    padding: var(--spacing-md);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
}

.chart-container {
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    padding: var(--spacing-lg);
}

.chart-placeholder {
    height: 200px;
    position: relative;
}

.chart-line {
    width: 100%;
    height: 150px;
    border-left: 2px solid var(--color-gray-300);
    border-bottom: 2px solid var(--color-gray-300);
    position: relative;
}

.chart-line::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    background: linear-gradient(135deg, transparent 40%, var(--color-gray-200) 40%, var(--color-gray-200) 60%, transparent 60%);
}

.chart-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--color-gray-600);
}

.comparison-table {
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    padding: var(--spacing-lg);
}

.comparison-table h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.comparison-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.company-name {
    width: 100px;
    font-size: 0.9rem;
    font-weight: 500;
}

.progress-bar {
    flex: 1;
    height: 32px;
    background-color: var(--color-gray-100);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--color-black);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--spacing-sm);
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 600;
}

/* 社会证明 */
.social-proof {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
    text-align: center;
}

.proof-text {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.proof-categories {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.category {
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

/* 核心指标功能 */
.features-metrics {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray-600);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.metrics-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.metric-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.metric-feature:nth-child(even) {
    direction: rtl;
}

.metric-feature:nth-child(even) > * {
    direction: ltr;
}

.metric-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.metric-content p {
    font-size: 1.05rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

.metric-demo {
    border: 2px solid var(--color-black);
    border-radius: 8px;
    padding: var(--spacing-2xl);
    text-align: center;
}

.demo-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.demo-badge {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.demo-value {
    font-size: 3rem;
    font-weight: 700;
}

.ranking-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ranking-item {
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-weight: 500;
    text-align: left;
}

/* 核心功能流程 */
.key-features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.feature-card {
    background-color: var(--color-white);
    border: 2px solid var(--color-black);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.feature-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

.recommendations-preview {
    margin-top: var(--spacing-md);
}

.recommendation-badge {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.85rem;
}

.strategy-recommendations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.recommendation-item {
    display: flex;
    gap: var(--spacing-md);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: 8px;
    padding: var(--spacing-lg);
}

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

.recommendation-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.recommendation-content p {
    font-size: 0.85rem;
    color: var(--color-gray-600);
}

/* 客户评价 */
.testimonials {
    padding: var(--spacing-3xl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    border: 2px solid var(--color-black);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.testimonial-author strong {
    font-weight: 600;
}

.testimonial-author span {
    font-size: 0.85rem;
    color: var(--color-gray-600);
}

/* 最终 CTA */
.final-cta {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-gray-50);
    text-align: center;
}

.final-cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* FAQ */
.faq {
    padding: var(--spacing-3xl) 0;
}

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

.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    background: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: var(--spacing-lg);
}

.faq-answer p {
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: white;
    border-top: none;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-subtitle {
    margin-top: 0.25rem;
    font-size: 0.85rem !important;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: white;
}

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

.footer-column li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .nav-menu {
        display: none;
    }

    .dashboard-content {
        flex-direction: column;
    }

    .dashboard-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--color-gray-200);
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .metric-feature {
        grid-template-columns: 1fr;
    }

    .metric-feature:nth-child(even) {
        direction: ltr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

/* 联系表单模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-content {
    background-color: var(--color-white);
    border: 2px solid var(--color-black);
    border-radius: 12px;
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 100%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-gray-600);
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-black);
}

.modal-content h2 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
}

.contact-form .form-group {
    margin-bottom: var(--spacing-md);
}

.contact-form label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

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

.contact-form textarea {
    resize: vertical;
}

/* 动态仪表盘演示样式 */
.dashboard-demo {
    background: #fafafa;
    padding: var(--spacing-md) 0 var(--spacing-2xl) 0;
}

.dashboard-demo .container {
    /* 外层container不加边框 */
}

.dashboard-wrapper {
    background: white;
    border: 3px solid var(--color-black);
    padding: var(--spacing-xl);
}

.demo-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.demo-metric-card {
    background: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all 0.3s;
}

.demo-metric-card:hover {
    border-color: var(--color-black);
    transform: translateY(-2px);
}

.demo-metric-primary {
    background: var(--color-black);
    color: white;
    border-color: var(--color-black);
}

.demo-metric-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.demo-metric-primary .demo-metric-label {
    color: rgba(255, 255, 255, 0.9);
}

.demo-metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.demo-metric-trend {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
}

.demo-metric-trend svg {
    width: 12px;
    height: 12px;
}

.demo-two-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.demo-info-card,
.demo-chart-card {
    background: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 12px;
    padding: var(--spacing-lg);
}

.demo-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.demo-card-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.demo-card-header svg {
    flex-shrink: 0;
}

.demo-info-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.demo-info-item {
    font-size: 0.9rem;
    line-height: 1.6;
}

.demo-info-item strong {
    font-weight: 700;
}

.change-positive {
    color: var(--color-gray-600);
    font-size: 0.85rem;
}

.change-negative {
    color: var(--color-gray-600);
    font-size: 0.85rem;
}

.demo-bar-chart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.demo-bar-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.demo-bar-label {
    min-width: 80px;
    font-size: 0.9rem;
    font-weight: 500;
}

.demo-bar-wrapper {
    flex: 1;
    position: relative;
    height: 36px;
}

.demo-bar {
    height: 100%;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 var(--spacing-sm);
    transition: width 0.5s ease;
    width: 0;
}

.demo-bar-primary {
    background: var(--color-black);
}

.demo-bar-gray {
    background: var(--color-gray-400);
}

.demo-bar-value {
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
}

.demo-platform-section {
    background: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 12px;
    padding: var(--spacing-xl);
}

.demo-section-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.demo-platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.demo-platform-card {
    background: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s;
}

.demo-platform-card:hover {
    border-color: var(--color-black);
    transform: translateY(-2px);
}

.demo-platform-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.demo-platform-rank {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.demo-platform-rank strong {
    font-weight: 700;
}

.demo-platform-details {
    font-size: 0.8rem;
    color: var(--color-gray-600);
}

/* 响应式 */
@media (max-width: 1024px) {
    .demo-metrics-grid,
    .demo-platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-two-columns {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .demo-metrics-grid,
    .demo-platform-grid {
        grid-template-columns: 1fr;
    }
}

/* 用户头像样式 */
.user-avatar-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.user-avatar-simple {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: black;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.user-avatar-simple:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}