/* --- 全局与基础样式 --- */
:root {
    --primary-color: #007bff;
    --supported-color: #28a745;
    --unsupported-color: #dc3545;
    --card-bg: #ffffff;
    --text-color: #333;
    --light-text-color: #f8f9fa;
    --bg-color: #f4f7f9;
    --border-color: #e9ecef;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth; /* 平滑滚动效果 */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- 头部 Hero 区域 --- */
.hero {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    color: var(--light-text-color);
    padding: 50px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.8rem;
    margin: 0 0 10px;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    opacity: 0.9;
}

/* --- 分类导航 --- */
.category-nav {
    background-color: var(--card-bg);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky; /* 粘性定位 */
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

#category-nav-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.category-link {
    text-decoration: none;
    color: var(--primary-color);
    background-color: #eaf2ff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.category-link:hover {
    background-color: var(--primary-color);
    color: var(--light-text-color);
    transform: translateY(-2px);
}

/* --- API 分类区域 --- */
.api-category {
    margin-top: 50px;
}

.category-title {
    font-size: 2rem;
    color: #343a40;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 30px;
}

/* --- API 卡片网格布局 --- */
.api-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

/* --- 单个 API 卡片样式 (与之前版本相同) --- */
.api-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 25px;
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    border-left: 5px solid var(--border-color);
    display: flex;
    flex-direction: column;
}
.api-card:hover { transform: translateY(-5px); box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12); }
.api-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.api-name { font-size: 1.4rem; font-weight: 600; color: var(--primary-color); margin: 0; }
.api-status { padding: 5px 12px; border-radius: 20px; font-size: 0.9rem; font-weight: bold; display: flex; align-items: center; gap: 6px; }
.api-description { font-size: 0.95rem; color: #666; flex-grow: 1; }
.api-card.supported { border-left-color: var(--supported-color); }
.api-card.unsupported { border-left-color: var(--unsupported-color); opacity: 0.8; }
.api-card.supported .api-status { background-color: #eaf6ec; color: var(--supported-color); }
.api-card.unsupported .api-status { background-color: #fbebee; color: var(--unsupported-color); }

/* --- 页脚样式 --- */
.site-footer {
    background-color: #343a40;
    color: var(--light-text-color);
    text-align: center;
    padding: 20px 0;
    margin-top: 60px;
    font-size: 0.9rem;
}

/* --- 响应式设计 --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .hero .subtitle { font-size: 1rem; }
    .api-grid { grid-template-columns: 1fr; }
    .category-nav { position: static; } /* 在小屏幕上取消粘性定位 */
    #category-nav-container { justify-content: flex-start; }
}