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

:root {
    --primary-color: #6366f1;
    --secondary-color: #0ea5e9;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #18181b;
    --card-bg: #232336;
    --text-primary: #f3f4f6;
    --text-secondary: #a1a1aa;
    --border-color: #2a2a3c;
    --shadow: 0 4px 16px rgba(0,0,0,0.25);
    --shadow-lg: 0 10px 32px rgba(0,0,0,0.35);
}

/* 浅色主题 */
body.light-theme {
    --dark-bg: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #222;
    --text-secondary: #555;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #18181b 0%, #232336 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    background: rgba(30,32,48,0.98);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.navbar-logo:hover {
    transform: scale(1.05);
}

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

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 主题切换按钮 */
.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    transition: all 0.3s ease;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: rotate(20deg);
    color: var(--secondary-color);
}

/* ============================================
   英雄区域
   ============================================ */
.hero {
    position: relative;
    overflow: hidden;
    min-height: 400px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

#globe-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.28;
    min-width: 300px;
    min-height: 300px;
}

.hero-content {
    flex: 1;
    animation: slideInLeft 0.8s ease;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.hero-image {
    flex: 1;
    font-size: 10rem;
    color: var(--primary-color);
    opacity: 0.1;
    animation: float 3s ease-in-out infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

/* ============================================
   统计区域
   ============================================ */
.stats-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1.5rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.2);
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ============================================
   主容器
   ============================================ */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   分类区域
   ============================================ */
.overview-section,
.analysis-section,
.about-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: initial;
    background-clip: text;
    color: var(--primary-color);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ============================================
   过滤控制
   ============================================ */
.filter-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.search-box,
.sort-select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-box {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
}

.search-box:focus,
.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ============================================
   加密货币网格
   ============================================ */
.crypto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.crypto-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.crypto-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.crypto-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.crypto-card:hover::before {
    opacity: 1;
}

.crypto-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.crypto-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.favorite-btn,
.alert-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.favorite-btn:hover,
.alert-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.favorite-btn.active {
    color: #fbbf24;
    border-color: #fbbf24;
}

.crypto-name {
    font-size: 1.25rem;
    font-weight: 700;
}

.crypto-symbol {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
}

.crypto-rank {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.crypto-price {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.crypto-change {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.change-item {
    flex: 1;
}

.change-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
}

.change-value {
    font-size: 1rem;
    font-weight: 700;
}

.change-positive {
    color: var(--success-color);
}

.change-negative {
    color: var(--danger-color);
}

.crypto-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

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

.detail-label {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.detail-value {
    font-weight: 600;
}

.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ============================================
   分析区域
   ============================================ */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.analysis-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 2rem;
    transition: all 0.3s ease;
}

.analysis-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.analysis-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.analysis-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

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

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

.analysis-item-name {
    font-weight: 600;
}

.analysis-item-change {
    font-weight: 700;
}

/* ============================================
   投资组合区域
   ============================================ */
.portfolio-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

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

.portfolio-form {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px;
}

.portfolio-form h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.portfolio-form .btn {
    width: 100%;
}

.portfolio-summary {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px;
}

.portfolio-summary h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.portfolio-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.portfolio-stat {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.portfolio-stat span:first-child {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.portfolio-stat span:last-child {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 700;
}

.portfolio-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.portfolio-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.portfolio-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.portfolio-item-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.portfolio-item-delete {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.25rem 0.5rem;
    transition: all 0.3s ease;
}

.portfolio-item-delete:hover {
    transform: scale(1.2);
}

.portfolio-item-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.portfolio-item-detail {
    padding: 0.75rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 6px;
}

.portfolio-item-detail-label {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.portfolio-item-detail-value {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
}

/* ============================================
   币种对比分析区域
   ============================================ */
.comparison-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.comparison-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.comparison-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    min-width: 150px;
    transition: all 0.3s ease;
}

.comparison-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.comparison-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.comparison-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
}

.comparison-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.comparison-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.comparison-card-remove {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0;
}

.comparison-metrics {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 6px;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.metric-value {
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
}

.comparison-table th {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    padding: 1rem;
    text-align: left;
    font-weight: 700;
    border: 1px solid var(--border-color);
}

.comparison-table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* ============================================
   价格图表区域
   ============================================ */
.charts-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.chart-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.chart-input,
.chart-select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.chart-input:focus,
.chart-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.chart-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    position: relative;
    height: 400px;
}

.chart-container canvas {
    max-height: 100%;
}

/* ============================================
   AI 市场预测区域
   ============================================ */
.prediction-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.prediction-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.prediction-input {
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    min-width: 250px;
    transition: all 0.3s ease;
}

.prediction-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.prediction-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.prediction-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.prediction-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.prediction-header {
    margin-bottom: 1.5rem;
}

.prediction-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.prediction-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.prediction-metrics {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric {
    background: rgba(99, 102, 241, 0.05);
    padding: 1rem;
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.metric-trend {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.metric-trend.positive {
    color: #10b981;
}

.metric-trend.negative {
    color: #ef4444;
}

.prediction-chart {
    width: 100%;
    height: 250px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 8px;
    margin-top: 1rem;
}

/* ============================================
   实时价格推送区域
   ============================================ */
.realtime-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.realtime-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.realtime-input {
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    min-width: 250px;
    transition: all 0.3s ease;
}

.realtime-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.connection-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    background: var(--card-bg);
}

.connection-status.connected {
    color: #10b981;
    background: rgba(16, 185, 129, 0.1);
}

.connection-status.disconnected {
    color: var(--text-secondary);
}

.realtime-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    min-height: 300px;
}

.realtime-prices {
    display: grid;
    gap: 1rem;
}

.realtime-price-item {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
    align-items: center;
}

.price-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.price-details h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.price-details p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

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

.price-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price-change {
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.price-change.up {
    color: #10b981;
}

.price-change.down {
    color: #ef4444;
}

.price-timestamp {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: right;
}

/* ============================================
   新闻区域
   ============================================ */
.news-section {
    padding: 4rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.news-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.news-filter-btn {
    padding: 0.6rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.news-filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.news-filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.news-feed {
    display: grid;
    gap: 1.5rem;
}

.news-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.news-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.news-item-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}

.news-item-time {
    color: var(--text-secondary);
    font-size: 0.8rem;
    white-space: nowrap;
    margin-left: 1rem;
}

.news-item-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.news-item-source {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.news-item-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.news-item-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}
.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.about-card {
    background: linear-gradient(135deg, #232336 0%, #18181b 100%);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.about-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.about-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: linear-gradient(135deg, #18181b 0%, #232336 100%);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 3rem 2rem;
    margin-top: 3rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.footer-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-content a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

.social-links a {
    font-size: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 50%;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    color: white;
}

/* ============================================
   币种详情模态框
   ============================================ */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.detail-crypto-image {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
}

.modal-title h2 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-primary);
}

.modal-title p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.modal-body {
    padding: 2rem;
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.detail-item {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-item .label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.detail-item .value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    word-break: break-all;
}

.price-highlight {
    font-size: 1.5rem !important;
    color: var(--primary-color) !important;
}

.value.positive {
    color: #10b981;
}

.value.negative {
    color: #ef4444;
}

.detail-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.detail-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.detail-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.detail-links a:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

.detail-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* ============================================
   响应式设计 - 平板设备 (768px 以下)
   ============================================ */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    /* 导航栏优化 */
    .navbar-container {
        padding: 0.75rem 1rem;
        gap: 1rem;
    }

    .navbar-logo {
        font-size: 1.2rem;
    }

    .theme-toggle {
        font-size: 1.25rem;
        padding: 0.4rem;
    }

    .hamburger {
        display: flex;
        gap: 4px;
    }

    .hamburger span {
        width: 20px;
        height: 2.5px;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        padding: 1rem;
        gap: 0.5rem;
        z-index: 999;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        display: block;
    }

    /* Hero 区域 */
    .hero {
        flex-direction: column;
        text-align: center;
        min-height: 300px;
        padding: 2rem 1rem;
    }

    .hero-content {
        margin-bottom: 1.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
        margin-bottom: 0.75rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }

    .hero-image {
        font-size: 4rem;
        opacity: 0.15;
    }

    /* 统计卡片 */
    .stats-section {
        padding: 2rem 1rem;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    /* 主容器 */
    .main-container {
        max-width: 100%;
        padding: 0;
    }

    /* 分类区域 */
    .overview-section,
    .analysis-section,
    .about-section,
    .portfolio-section,
    .comparison-section,
    .charts-section,
    .news-section {
        padding: 2rem 1rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }

    .section-header p {
        font-size: 0.9rem;
    }

    /* 过滤控制 */
    .filter-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .search-box,
    .sort-select {
        width: 100%;
        font-size: 14px;
        padding: 0.6rem 0.8rem;
    }

    /* 加密货币网格 */
    .crypto-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .crypto-card {
        padding: 1rem;
    }

    .crypto-header {
        gap: 0.5rem;
    }

    .crypto-name {
        font-size: 1rem;
    }

    .crypto-price {
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
    }

    /* 分析网格 */
    .analysis-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .analysis-card {
        padding: 1rem;
    }

    .analysis-card h3 {
        font-size: 1rem;
        margin-bottom: 0.75rem;
    }

    /* 投资组合 */
    .portfolio-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .portfolio-form,
    .portfolio-summary {
        padding: 1rem;
    }

    .form-input {
        padding: 0.6rem 0.8rem;
        font-size: 14px;
        margin-bottom: 0.6rem;
    }

    .portfolio-stats {
        grid-template-columns: 1fr;
    }

    .portfolio-list {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .portfolio-item {
        padding: 1rem;
    }

    /* 对比分析 */
    .comparison-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .comparison-input {
        width: 100%;
        min-width: unset;
        font-size: 14px;
        padding: 0.6rem 0.8rem;
    }

    .comparison-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .comparison-card {
        padding: 1rem;
    }

    .comparison-table {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.5rem;
    }

    /* 图表区域 */
    .chart-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .chart-input,
    .chart-select {
        width: 100%;
        font-size: 14px;
        padding: 0.6rem 0.8rem;
    }

    .chart-container {
        padding: 1rem;
        height: 300px;
    }

    /* AI 预测区域 */
    .prediction-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .prediction-input {
        width: 100%;
        min-width: unset;
        font-size: 14px;
        padding: 0.6rem 0.8rem;
    }

    .prediction-container {
        grid-template-columns: 1fr;
    }

    /* 实时推送区域 */
    .realtime-controls {
        flex-direction: column;
        gap: 0.75rem;
    }

    .realtime-input {
        width: 100%;
        min-width: unset;
        font-size: 14px;
        padding: 0.6rem 0.8rem;
    }

    .realtime-price-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* 新闻区域 */
    .news-filters {
        gap: 0.5rem;
    }

    .news-filter-btn {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .news-item {
        padding: 1rem;
    }

    .news-item-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .news-item-title {
        font-size: 1rem;
    }

    .news-item-time {
        margin-left: 0;
    }

    /* 模态框 */
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .modal-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .modal-title {
        justify-content: center;
    }

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

    .detail-actions {
        grid-template-columns: 1fr;
    }

    /* 关于区域 */
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-card {
        padding: 1.5rem;
    }

    .about-card i {
        font-size: 2rem;
    }

    /* 页脚 */
    .footer {
        padding: 2rem 1rem;
    }

    .social-links {
        gap: 1rem;
    }

    .social-links a {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }
}

/* ============================================
   响应式设计 - 手机设备 (480px 以下)
   ============================================ */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    body {
        font-size: 13px;
    }

    /* 导航栏 */
    .navbar-container {
        padding: 0.5rem 0.75rem;
    }

    .navbar-logo {
        font-size: 1rem;
        gap: 0.25rem;
    }

    .navbar-logo i {
        font-size: 1.1rem;
    }

    .theme-toggle {
        font-size: 1rem;
        padding: 0.3rem;
    }

    /* Hero 区域 */
    .hero {
        min-height: 250px;
        padding: 1.5rem 1rem;
    }

    .hero-title {
        font-size: 1.4rem;
        margin-bottom: 0.5rem;
    }

    .hero-subtitle {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .hero-image {
        font-size: 3rem;
    }

    /* 统计卡片 */
    .stats-section {
        padding: 1.5rem 0.75rem;
    }

    .stats-container {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .stat-card {
        padding: 0.75rem;
    }

    .stat-value {
        font-size: 1.1rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    /* 分类区域 */
    .overview-section,
    .analysis-section,
    .about-section,
    .portfolio-section,
    .comparison-section,
    .charts-section,
    .news-section {
        padding: 1.5rem 0.75rem;
    }

    .section-header {
        margin-bottom: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header p {
        font-size: 0.8rem;
    }

    /* 过滤控制 */
    .filter-controls {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }

    .search-box,
    .sort-select {
        padding: 0.5rem 0.6rem;
        font-size: 13px;
    }

    /* 加密货币卡片 */
    .crypto-card {
        padding: 0.75rem;
    }

    .crypto-name {
        font-size: 0.9rem;
    }

    .crypto-symbol {
        font-size: 0.75rem;
    }

    .crypto-price {
        font-size: 1.1rem;
    }

    .crypto-change {
        gap: 0.5rem;
    }

    .crypto-details {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .detail-label {
        font-size: 0.7rem;
    }

    .detail-value {
        font-size: 0.85rem;
    }

    /* 投资组合 */
    .portfolio-container {
        gap: 1rem;
    }

    .portfolio-form,
    .portfolio-summary {
        padding: 0.75rem;
    }

    .form-input {
        padding: 0.5rem;
        font-size: 13px;
        margin-bottom: 0.5rem;
    }

    .portfolio-stats {
        gap: 0.5rem;
    }

    .portfolio-stat {
        padding: 0.5rem;
    }

    .portfolio-item {
        padding: 0.75rem;
    }

    .portfolio-item-name {
        font-size: 0.95rem;
    }

    .portfolio-item-details {
        gap: 0.5rem;
    }

    .portfolio-item-detail {
        padding: 0.5rem;
    }

    /* 对比分析 */
    .comparison-controls {
        gap: 0.5rem;
    }

    .comparison-input {
        padding: 0.5rem;
        font-size: 13px;
    }

    .comparison-container {
        gap: 0.75rem;
    }

    .comparison-card {
        padding: 0.75rem;
    }

    .comparison-metrics {
        gap: 0.5rem;
    }

    .metric-item {
        padding: 0.5rem;
    }

    .metric-label {
        font-size: 0.8rem;
    }

    .metric-value {
        font-size: 0.9rem;
    }

    .comparison-table {
        font-size: 0.75rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.4rem;
    }

    /* 图表 */
    .chart-controls {
        gap: 0.5rem;
    }

    .chart-input,
    .chart-select {
        padding: 0.5rem;
        font-size: 13px;
    }

    .chart-container {
        padding: 0.75rem;
        height: 250px;
    }

    /* AI 预测 */
    .prediction-controls {
        gap: 0.5rem;
    }

    .prediction-input {
        padding: 0.5rem;
        font-size: 13px;
    }

    .prediction-container {
        grid-template-columns: 1fr;
    }

    .prediction-card {
        padding: 1rem;
    }

    .prediction-chart {
        height: 200px;
    }

    /* 实时推送 */
    .realtime-controls {
        gap: 0.5rem;
    }

    .realtime-input {
        padding: 0.5rem;
        font-size: 13px;
    }

    .realtime-price-item {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        padding: 0.75rem;
    }

    .price-value {
        font-size: 1.25rem;
    }

    .price-timestamp {
        text-align: left;
    }

    /* 新闻 */
    .news-filters {
        gap: 0.4rem;
    }

    .news-filter-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .news-item {
        padding: 0.75rem;
    }

    .news-item-title {
        font-size: 0.95rem;
    }

    .news-item-description {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
    }

    .news-item-source {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .news-item-link {
        font-size: 0.85rem;
        margin-top: 0.5rem;
    }

    /* 关于卡片 */
    .about-card {
        padding: 1rem;
    }

    .about-card i {
        font-size: 1.75rem;
        margin-bottom: 0.5rem;
    }

    .about-card h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .about-card p {
        font-size: 0.85rem;
    }

    /* 页脚 */
    .footer {
        padding: 1.5rem 0.75rem;
    }

    .footer-content p {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }

    .social-links {
        gap: 0.75rem;
        margin-top: 1rem;
    }

    .social-links a {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
}