/* ===== css/style.css ===== */
/* 加拿大28预测分析平台 - 完整样式表 */
/* 整合所有页面样式，包含全局变量、组件及页面专属样式 */

:root {
    --color-primary: #4f46e5;
    --color-primary-light: #6366f1;
    --color-primary-dark: #4338ca;
    --color-secondary: #10b981;
    --color-accent: #f59e0b;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --color-white: #ffffff;
    --color-black: #000000;

    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-large: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-gray-50);
    color: var(--color-gray-800);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ---------- 工具类与容器 ---------- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 600;
}

.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-lg);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    font-size: 0.9375rem;
    line-height: 1.5;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border-color: var(--color-gray-300);
    color: var(--color-gray-700);
}

.btn-outline:hover {
    background: var(--color-gray-100);
    border-color: var(--color-gray-400);
}

.btn-large {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

.card-hover {
    transition: var(--transition);
    will-change: transform;
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.rounded-image {
    border-radius: var(--radius-lg);
    object-fit: cover;
    width: 100%;
    height: auto;
}

.shadow-large {
    box-shadow: var(--shadow-large);
}

/* ---------- 头部导航 ---------- */
.main-header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--color-gray-200);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo-area {
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-gray-900);
}

.logo-icon {
    font-size: 2rem;
    line-height: 1;
}

.logo-text {
    letter-spacing: -0.02em;
}

.logo-accent {
    color: var(--color-primary);
    margin-left: 0.25rem;
}

.main-nav {
    flex: 1;
    margin: 0 2rem;
}

.nav-list {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-item a {
    font-weight: 500;
    color: var(--color-gray-600);
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

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

.header-actions {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-gray-700);
}

@media (max-width: 1024px) {
    .main-nav {
        display: none;
    }
    .header-actions {
        display: none;
    }
    .mobile-menu-toggle {
        display: block;
    }
}

/* ---------- 英雄区域 ---------- */
.hero-section {
    padding: 4rem 0 3rem;
    background: linear-gradient(to bottom, var(--color-white), var(--color-gray-50));
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-content {
    flex: 1 1 50%;
}

.hero-badge {
    display: inline-block;
    background: rgba(79, 70, 229, 0.1);
    color: var(--color-primary-dark);
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-gray-900);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 560px;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.hero-image {
    flex: 1 1 50%;
    position: relative;
}

.hero-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: var(--transition);
}

.hero-image:hover img {
    transform: scale(1.02);
}

.image-accent-dot {
    position: absolute;
    bottom: -1rem;
    right: -1rem;
    width: 8rem;
    height: 8rem;
    background: radial-gradient(circle at 30% 30%, rgba(79, 70, 229, 0.2), transparent 70%);
    border-radius: 50%;
    z-index: -1;
}

@media (max-width: 1024px) {
    .hero-container {
        flex-direction: column;
        gap: 2rem;
    }
    .hero-content {
        text-align: center;
    }
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    .stat-item {
        align-items: center;
    }
}

/* ---------- 信任条 ---------- */
.trust-bar {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 1rem 0;
}

.trust-logos {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.trust-logos span {
    color: var(--color-gray-600);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ---------- 特性卡片 ---------- */
.features-section {
    padding: 5rem 0;
    background-color: var(--color-white);
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    background-color: var(--color-white);
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-gray-900);
}

.feature-card p {
    color: var(--color-gray-600);
    margin-bottom: 1.5rem;
    flex: 1;
}

.card-link {
    color: var(--color-primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.card-link:hover {
    color: var(--color-primary-dark);
    gap: 0.5rem;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- 近期表格 ---------- */
.recent-section {
    padding: 5rem 0;
    background-color: var(--color-gray-50);
}

.table-wrapper {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow-x: auto;
    padding: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.data-table th {
    text-align: left;
    padding: 1rem 1rem;
    font-weight: 600;
    color: var(--color-gray-500);
    border-bottom: 2px solid var(--color-gray-200);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: 1rem 1rem;
    border-bottom: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background-color: var(--color-gray-50);
}

.badge-hit {
    background-color: #d1fae5;
    color: #065f46;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.75rem;
    display: inline-block;
}

.table-footer-link {
    margin-top: 2rem;
    text-align: right;
}

.link-arrow {
    color: var(--color-primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.link-arrow:hover {
    gap: 0.5rem;
}

/* ---------- 深度统计 ---------- */
.stats-deep-section {
    padding: 5rem 0;
    background-color: var(--color-white);
}

.stats-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.section-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.stats-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.stats-content p {
    color: var(--color-gray-600);
    margin-bottom: 2rem;
    font-size: 1.0625rem;
}

.stats-list {
    margin-bottom: 2.5rem;
}

.stats-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--color-gray-300);
    font-weight: 500;
}

.stats-list li:first-child {
    padding-top: 0;
}

.stats-list li span:first-child {
    color: var(--color-gray-700);
}

.stats-list li span:last-child {
    color: var(--color-gray-900);
    font-weight: 700;
}

.cta-mini {
    margin-top: 2rem;
}

.stats-visual {
    background-color: var(--color-gray-50);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    height: 260px;
    margin-bottom: 1.5rem;
}

.bar-item {
    flex: 1;
    background: linear-gradient(to top, var(--color-primary), #818cf8);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    min-height: 40px;
    position: relative;
    transition: var(--transition);
}

.bar-item:hover {
    opacity: 0.9;
    transform: scaleY(1.02);
}

.bar-item span {
    position: absolute;
    bottom: -1.75rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--color-gray-500);
    white-space: nowrap;
}

.chart-caption {
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .stats-grid-2col {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ---------- 策略社区 ---------- */
.strategy-section {
    padding: 5rem 0;
    background-color: var(--color-gray-50);
}

.strategy-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.strategy-item {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.strategy-meta {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 0.75rem;
}

.strategy-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-gray-900);
}

.strategy-item p {
    color: var(--color-gray-600);
    margin-bottom: 1rem;
}

.strategy-item a {
    color: var(--color-primary);
    font-weight: 500;
}

.strategy-item a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .strategy-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .strategy-cards {
        grid-template-columns: 1fr;
    }
}

/* ---------- CTA订阅区 ---------- */
.cta-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
}

.cta-box {
    background-color: rgba(255,255,255,0.1);
    backdrop-filter: blur(4px);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: var(--shadow-xl);
    color: white;
}

.cta-box h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.subscribe-form {
    display: flex;
    max-width: 500px;
    margin: 0 auto 1rem;
    gap: 0.5rem;
}

.subscribe-form input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    outline: none;
    background-color: rgba(255,255,255,0.95);
    color: var(--color-gray-900);
}

.subscribe-form input::placeholder {
    color: var(--color-gray-400);
}

.subscribe-form .btn-primary {
    background: var(--color-white);
    color: var(--color-primary);
    border: none;
    font-weight: 600;
}

.subscribe-form .btn-primary:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
}

.form-note {
    font-size: 0.875rem;
    opacity: 0.7;
}

@media (max-width: 640px) {
    .subscribe-form {
        flex-direction: column;
    }
}

/* ---------- 页脚 ---------- */
.main-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.footer-col.about-col p {
    margin-bottom: 1.5rem;
    color: var(--color-gray-400);
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: var(--color-gray-400);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: white;
    padding-left: 0.25rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(255,255,255,0.1);
    border-radius: var(--radius-full);
    color: white;
    font-size: 1.25rem;
}

.social-links a:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: 2rem;
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== 页面专属样式 ========== */
/* ---------- 预测页面 (predict.html) ---------- */
.page-title-section {
    padding: 3rem 0 1rem;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-500);
}

.glass-card {
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
}

.predict-main {
    margin-bottom: 3rem;
}

.predict-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.predict-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
}

.badge {
    background: var(--color-primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
}

.predict-result-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-item {
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--color-gray-200);
}

.result-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    display: block;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-gray-900);
    display: block;
    line-height: 1.2;
}

.result-desc {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
}

.predict-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

@media (max-width: 768px) {
    .predict-result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .predict-result-grid {
        grid-template-columns: 1fr;
    }
}

.progress-bars {
    margin-top: 2rem;
}

.progress-item {
    margin-bottom: 1.5rem;
}

.progress-item span {
    display: block;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.progress {
    background: var(--color-gray-200);
    height: 2rem;
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    background: linear-gradient(90deg, var(--color-primary), #818cf8);
    height: 100%;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 1rem;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
}

.chart-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

.chart-card h4 {
    margin-bottom: 1rem;
}

.chart-svg {
    width: 100%;
    height: auto;
}

.chart-note {
    text-align: center;
    color: var(--color-gray-500);
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

/* ---------- 走势图表页面 (trend.html) ---------- */
.range-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.range-btn {
    background: var(--color-gray-100);
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.range-btn.active,
.range-btn:hover {
    background: var(--color-primary);
    color: white;
}

.chart-container {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.chart-box {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 250px;
}

.chart-bar {
    flex: 1;
    background: linear-gradient(to top, var(--color-primary), #818cf8);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-width: 20px;
    position: relative;
}

.chart-bar-label {
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--color-gray-500);
}

.hotmap-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.hotmap-cell {
    background: var(--color-primary);
    color: white;
    padding: 0.5rem;
    text-align: center;
    border-radius: var(--radius-md);
    opacity: 0.7;
    transition: var(--transition);
}

.hotmap-cell:hover {
    opacity: 1;
    transform: scale(1.05);
}

/* ---------- 策略社区页面 (strategy.html) ---------- */
.community-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    margin: 2rem 0;
}

.post-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
}

.post-meta {
    display: flex;
    gap: 1rem;
    color: var(--color-gray-500);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.post-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.post-excerpt {
    color: var(--color-gray-600);
    margin-bottom: 1rem;
}

.post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.post-tags {
    display: flex;
    gap: 0.5rem;
}

.tag {
    background: var(--color-gray-100);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-gray-600);
}

.sidebar-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border-left: 4px solid var(--color-primary);
    padding-left: 0.75rem;
}

.author-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.author-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 40px;
    height: 40px;
    background: var(--color-primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.search-box {
    display: flex;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 2rem;
}

.search-box input {
    flex: 1;
    border: none;
    padding: 0.75rem 1rem;
    outline: none;
}

.search-box button {
    background: var(--color-primary);
    border: none;
    color: white;
    padding: 0 1.5rem;
    cursor: pointer;
    font-size: 1.25rem;
}

@media (max-width: 768px) {
    .community-layout {
        grid-template-columns: 1fr;
    }
}

/* ---------- 关于我们页面 (about.html) ---------- */
.about-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    margin-bottom: 3rem;
}

.about-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.about-hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

.mission-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-xl);
    margin-bottom: 4rem;
    border: 1px solid var(--color-gray-200);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.value-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

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

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

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

.member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    font-weight: bold;
}

.member-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.member-role {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .values-grid, .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .values-grid, .team-grid {
        grid-template-columns: 1fr;
    }
}