/* 复用统一视觉变量，保持站点风格一致 */
:root {
    --bg-from: #f2f6fc;
    --bg-to: #dbe4f0;
    --card-bg: #ffffff;
    --primary: #3d7bfd;
    --primary-dark: #2f64d6;
    --text: #233152;
    --text-muted: #6b7a99;
    --border: #e4ebf5;
    --shadow: 0 8px 24px rgba(35, 49, 82, 0.08);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(160deg, var(--bg-from) 0%, var(--bg-to) 100%);
    margin: 0;
    padding: 40px 20px;
    min-height: 100vh;
    color: var(--text);
}

.container {
    max-width: 880px;
    margin: 0 auto;
}

/* ===== 站点头部 ===== */
.site-header {
    text-align: center;
    margin-bottom: 36px;
}

.site-header h2 {
    margin: 0 0 10px;
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
}

.site-header .desc {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.8;
    font-weight: 500;
    letter-spacing: 0.4px;
}

.site-header .desc a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.site-header .desc a:hover {
    text-decoration: underline;
}

/* ===== 分区面板 ===== */
.section {
    margin-bottom: 32px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 22px 22px 26px;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow);
}

.section-title {
    margin: 0 0 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ===== 卡片通用 ===== */
.card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    box-shadow: 0 4px 14px rgba(35, 49, 82, 0.06);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(35, 49, 82, 0.14);
    border-color: var(--primary);
}

.card-icon {
    font-size: 30px;
    line-height: 1;
    margin-bottom: 14px;
}

.card-name {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
}

.card-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 语言 / 归属标签 */
.card-meta {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.75;
    letter-spacing: 0.3px;
}

/* ===== 重点推荐：大横幅卡片 ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.card.featured {
    background: linear-gradient(160deg, #ffffff 0%, #eef3ff 100%);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
    flex-direction: row;
    align-items: center;
    gap: 18px;
    padding: 24px 26px;
}

.card.featured::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(150deg, var(--primary), #a06bfd);
    z-index: -1;
}

.card.featured .card-icon {
    font-size: 40px;
    margin-bottom: 0;
    flex-shrink: 0;
}

.featured-body {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.card.featured .card-name {
    font-size: 22px;
    margin-bottom: 0;
}

.card.featured .card-desc {
    font-size: 14px;
}

.card.featured .card-meta {
    margin-top: 4px;
    font-size: 12px;
}

.card.featured:hover {
    border-color: var(--primary);
}

/* ===== 次重点：中等卡片 ===== */
.sub-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.card.sub {
    flex-direction: row;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
}

.card.sub .card-icon {
    font-size: 30px;
    margin-bottom: 0;
    flex-shrink: 0;
}

.card.sub .card-name {
    font-size: 18px;
    margin-bottom: 4px;
}

.card.sub .card-desc {
    font-size: 13px;
}

.card.sub .card-meta {
    margin-top: 4px;
    font-size: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 760px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .card.featured {
        flex-direction: column;
        align-items: flex-start;
        padding: 22px 24px;
    }

    .card.featured .card-icon {
        margin-bottom: 6px;
    }
}