/* 移除 Google Fonts 外部引用以符合 CSP 策略 */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    background-color: #f8f9fa; /* 极淡灰白背景 */
    color: #2d3748;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.page-loading,
.page-load-error {
    min-height: calc(100vh - 40px);
    display: grid;
    place-items: center;
    text-align: center;
}

.page-load-error {
    align-content: center;
    gap: 8px;
}

.page-load-error h1 {
    font-size: 1.4rem;
}

.page-load-error p {
    color: #718096;
}

.container {
    max-width: 1280px; /* 缩小最大宽度，留出更多空白 */
    margin: 0 auto;
    padding: 0 40px; /* 增加两侧内边距 */
}

/* 顶部标题 */
.header-section {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1a202c;
    margin-bottom: 10px;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: #718096;
    font-size: 1.1rem;
}

/* 主布局：左右分栏 */
.main-content {
    display: grid;
    grid-template-columns: 500px 1fr; /* 黄金比例调整，加宽左侧面板 */
    gap: 35px;
    margin-bottom: 40px;
    align-items: start;
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.right-panel {
    min-width: 0;
}

/* 卡片通用样式 */
.card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    border: 1px solid #e2e8f0;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
}

.card h3 {
    font-size: 0.95rem; /* 稍微调小标题字体 */
    font-weight: 700;
    color: #2d3748;
    padding: 16px 20px; /* 减小内边距 */
    margin: 0;
    border-bottom: 1px solid #f7fafc;
    display: flex;
    align-items: center;
    gap: 10px;
    background: #ffffff;
}

.card-body {
    padding: 18px 20px;
}

/* 图标盒子 */
.icon-box {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* 徽章 */
.badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    background: #edf2f7;
    color: #718096;
    margin-left: auto;
    font-weight: 500;
}
.badge-blue { background: #ebf8ff; color: #4299e1; }