* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue",
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
        Arial, sans-serif;
}

:root {
    --primary-color: #0056b3;
    --display-color: #3490f2;
    --success-color: #28a745;
    --error-color: #dc3545;
    --light-gray: #f4f7f9;
    --border-color: #e9ecef;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--light-gray);
    color: #333;
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.container {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    max-width: 700px;
    width: 90%;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

h2 {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
    color: #333;
}

#converter {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1.2rem;
    box-sizing: border-box;
}

/* --- 新增：涨跌概要样式 --- */
#rate-change-summary {
    text-align: center;
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 8px;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

#rate-change-summary p {
    margin: 0.5rem 0;
    font-size: 1.1rem;
}

#rate-change-summary strong {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.rate-change {
    font-weight: bold;
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    display: inline-block;
}

.rate-change.positive {
    color: #fff;
    background-color: var(--success-color);
    /* 绿色 */
}

.rate-change.negative {
    color: #fff;
    background-color: var(--error-color);
    /* 红色 */
}

.rate-change.neutral {
    color: #333;
    background-color: #ddd;
}
#results-list {
    margin-top: 1rem;
}
.rate-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    /* Logo和标题之间的间距 */
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    /* 确保Logo图片不变形 */
    flex-shrink: 0;
}
.rate-card h3 {
    margin: 0;
        color: #111;
        font-size: 1.2rem;
}

.main-result {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.main-result strong {
    color: var(--display-color);
}

.main-result small {
    font-size: 0.8rem;
    color: #666;
    display: block;
}

.detail-rates {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
    font-size: 0.9rem;
    background-color: var(--light-gray);
        padding: 1rem;
        border-radius: 5px;
}
.detail-rates p {
    margin: 0;
}

.timestamp {
    font-size: 0.75rem;
    color: #888;
    text-align: right;
    margin-top: 1rem;
}

.error {
    color: var(--error-color);
}

.hidden {
    display: none;
}

.data-source {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.8rem;
    color: #888;
}

.source-link {
    text-decoration: underline;
    color: inherit;
    cursor: pointer;
}
#last-updated {
    font-weight: bold;
}

@media (max-width: 600px) {
    #converter {
        grid-template-columns: 1fr;
    }
}