/* 汇率换算器样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 920px;
    margin: 0 auto;
}

/* 头部 */
header {
    text-align: center;
    color: white;
    padding: 40px 20px;
}

/* 品牌链接 */
.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: white;
    margin-bottom: 12px;
    opacity: 0.85;
    transition: opacity 0.2s;
}

.brand-link:hover {
    opacity: 1;
}

.brand-logo {
    font-size: 1.4rem;
}

.brand-name {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 1px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 工具导航 */
.tool-nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: nowrap;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.2);
    border-radius: 25px;
    color: white;
    text-decoration: none;
    font-size: 13px;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    white-space: nowrap;
}

.nav-item:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.nav-item.active {
    background: white;
    color: #667eea;
}

.nav-icon {
    font-size: 18px;
}

/* 计算器卡片 */
.calculator-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

/* 广告位 */
.ad-placeholder {
    background: #f0f0f0;
    border: 2px dashed #ccc;
    display: none;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
    margin: 20px 30px;
    border-radius: 8px;
}

#adSlot1, #adSlot3, #adSlot4 {
    height: 90px;
}

#adSlot2 {
    height: 280px;
    max-width: 336px;
    margin: 20px auto;
}

.bottom-ad {
    height: 90px;
    margin: 20px auto;
    max-width: 728px;
}

/* ====== 换算主区域 ====== */
.converter-section {
    padding: 30px;
}

.rate-status {
    text-align: center;
    padding: 10px;
    margin-bottom: 24px;
    background: #f0f4ff;
    border-radius: 10px;
    font-size: 14px;
    color: #667eea;
}

.rate-status.error {
    background: #fff0f0;
    color: #dc3545;
}

.status-icon {
    margin-right: 6px;
}

/* 换算面板 */
.converter-panel {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.currency-input-group {
    flex: 1;
    background: #f8f9fa;
    border-radius: 16px;
    padding: 20px;
    border: 2px solid transparent;
    transition: all 0.3s;
}

.currency-input-group:hover {
    border-color: #e0e0ff;
}

.currency-selector {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.flag-and-code {
    display: flex;
    align-items: center;
    gap: 8px;
}

.flag {
    font-size: 24px;
}

.currency-select {
    padding: 6px 10px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: #333;
    background: white;
    cursor: pointer;
    min-width: 90px;
}

.currency-select:focus {
    outline: none;
    border-color: #667eea;
}

.currency-name {
    font-size: 13px;
    color: #6c757d;
}

.amount-input {
    position: relative;
}

.amount-field {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #dee2e6;
    border-radius: 10px;
    font-size: 24px;
    font-weight: 600;
    background: white;
    color: #333;
    transition: all 0.3s;
}

.amount-field:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.result-field {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f4ff 100%);
    border-color: #667eea;
    color: #667eea;
}

.amount-hint {
    position: absolute;
    top: -10px;
    left: 14px;
    background: #6c757d;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
}

.result-field + .amount-hint {
    background: #667eea;
}

/* 交换按钮 */
.swap-section {
    flex-shrink: 0;
}

.swap-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid #dee2e6;
    background: white;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s;
    color: #667eea;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-btn:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: rotate(180deg);
}

/* 汇率展示 */
.rate-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    border-radius: 14px;
    color: white;
}

.rate-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 10px;
}

.rate-label {
    font-size: 14px;
    opacity: 0.85;
}

.rate-value {
    font-size: 22px;
    font-weight: 700;
}

.rate-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    opacity: 0.7;
}

/* ====== 快速换算 ====== */
.quick-convert-section,
.common-converts-section,
.chart-section,
.rates-table-section {
    padding: 30px;
    border-top: 1px solid #e9ecef;
}

.quick-convert-section h2,
.rates-table-section h2,
.chart-section h2,
.common-converts-section h2 {
    color: #333;
    margin-bottom: 8px;
    font-size: 1.3rem;
}

.section-desc {
    color: #6c757d;
    font-size: 14px;
    margin-bottom: 16px;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
}

.quick-card {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 14px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.quick-card:hover {
    border-color: #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
}

.quick-card .quick-amount {
    display: block;
    font-size: 12px;
    color: #6c757d;
    margin-bottom: 6px;
}

.quick-card .quick-result {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: #333;
}

/* ====== 汇率表格 ====== */
.rates-filter {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    color: #6c757d;
    transition: all 0.3s;
}

.filter-btn:hover {
    background: #e0e0ff;
    color: #667eea;
}

.filter-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.rates-table-wrap {
    overflow-x: auto;
}

.rates-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.rates-table th,
.rates-table td {
    padding: 12px 16px;
    text-align: center;
    border-bottom: 1px solid #f0f0f0;
}

.rates-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
    position: sticky;
    top: 0;
}

.rates-table tbody tr {
    cursor: pointer;
    transition: background 0.2s;
}

.rates-table tbody tr:hover {
    background: #f0f4ff;
}

.rates-table .currency-cell {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.rates-table .currency-cell .flag {
    font-size: 20px;
}

.rates-table .code-cell {
    font-weight: 600;
    color: #667eea;
}

.rates-table .rate-cell {
    font-weight: 600;
    color: #333;
}

.rates-table .inverse-cell {
    color: #6c757d;
    font-size: 13px;
}

.rates-table .category-tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.tag-major {
    background: #e0f7f5;
    color: #0f9b8e;
}

.tag-asia {
    background: #fff3e0;
    color: #e65100;
}

.tag-sea {
    background: #f3e5f5;
    color: #7b1fa2;
}

.tag-other {
    background: #e8eaf6;
    color: #3949ab;
}

.loading-cell {
    padding: 40px;
    color: #6c757d;
}

/* ====== 图表 ====== */
.chart-controls {
    margin-bottom: 16px;
}

.chart-pair {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.chart-currency-select {
    padding: 8px 12px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    font-size: 14px;
    color: #333;
    background: white;
    cursor: pointer;
}

.chart-vs {
    color: #6c757d;
    font-weight: 600;
}

.chart-container {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 14px;
}

.chart-note {
    margin-top: 12px;
    font-size: 12px;
    color: #6c757d;
    text-align: center;
}

/* ====== 常用换算 ====== */
.common-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.common-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    border-radius: 10px;
    padding: 14px 16px;
    transition: all 0.3s;
    cursor: pointer;
}

.common-card:hover {
    background: #f0f4ff;
    transform: translateY(-1px);
}

.common-card .common-label {
    font-size: 14px;
    color: #6c757d;
}

.common-card .common-value {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

/* ====== FAQ ====== */
.faq-section {
    padding: 30px;
    background: white;
    border-top: 1px solid #e9ecef;
}

.faq-section h2 {
    color: #333;
    margin-bottom: 24px;
    text-align: center;
}

.faq-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e9ecef;
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-item h4 {
    color: #667eea;
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.faq-item p {
    color: #6c757d;
    line-height: 1.7;
}

/* 分享按钮 */
.share-float {
    text-align: center;
    padding: 16px 0 8px;
}

.share-float .share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.share-float .share-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.share-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: rgba(0, 0, 0, 0.78);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    z-index: 10000;
    transition: transform 0.3s ease;
    pointer-events: none;
}

.share-toast.show {
    transform: translateX(-50%) translateY(0);
}

/* 页脚 */
footer {
    text-align: center;
    padding: 30px;
    color: white;
}

footer a {
    color: white;
    text-decoration: underline;
}

/* 响应式 */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .tool-nav {
        gap: 8px;
        flex-wrap: wrap;
    }

    .nav-item {
        padding: 8px 12px;
        font-size: 12px;
    }

    .converter-panel {
        flex-direction: column;
        gap: 8px;
    }

    .swap-section {
        display: flex;
        justify-content: center;
    }

    .swap-btn {
        transform: rotate(90deg);
    }

    .swap-btn:hover {
        transform: rotate(270deg);
    }

    .amount-field {
        font-size: 20px;
    }

    .rate-value {
        font-size: 18px;
    }

    .quick-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .converter-section {
        padding: 20px;
    }

    .quick-convert-section,
    .rates-table-section,
    .chart-section,
    .common-converts-section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .quick-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .currency-selector {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}