/* ========= 基础变量 ========= */
:root {
    --bg: 255 255 255;
    /* 背景基色 白色 */
    --fg: 28 28 30;
    /* 深灰文字 */
    --brand: 255 149 0;
    /* 橙色品牌色 iOS 风格 */
    --glass: rgba(255, 255, 255, 0.55);
    /* 磨砂玻璃白 */
    --border: rgba(255, 255, 255, 0.3);
    /* 半透明边框 */
    --radius-xl: 20px;
    --radius-lg: 14px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ========= 全局 ========= */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: rgb(var(--fg));
    background: #f9f9fb;
    /* 柔和白底，护眼 */
    line-height: 1.65;
}

/* ========= 头部 ========= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: saturate(180%) blur(20px);
    background: rgba(255, 255, 255, 0.7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
}

.brand-logo {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

.brand-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

/* ========= 导航 ========= */
.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 20px 14px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 12px;
    text-decoration: none;
    color: rgb(var(--fg));
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

/* ========= 容器 ========= */
.container {
    max-width: 1024px;
    margin: 24px auto;
    padding: 0 16px;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    gap: 6px;
    font-size: 14px;
    color: rgba(60, 60, 67, .6);
    margin: 8px 0 16px;
}

.breadcrumb a {
    color: inherit;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ========= 磨砂卡片 ========= */
.glass {
    background: var(--glass);
    backdrop-filter: saturate(180%) blur(18px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 20px;
}

.hero {
    text-align: center;
    padding: 32px 20px;
}

.hero-title {
    font-size: 24px;
    margin: 0 0 8px;
    font-weight: 700;
}

.hero-subtitle {
    color: rgba(60, 60, 67, .7);
    margin: 0 0 20px;
}

/* ========= 栅格布局 ========= */
.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(1, 1fr);
}

@media (min-width: 560px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 920px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.grid-month {
    grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 560px) {
    .grid-month {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 920px) {
    .grid-month {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* ========= 卡片 ========= */
.card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 16px;
    min-height: 72px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: saturate(180%) blur(18px);
    border: 1px solid rgba(0, 0, 0, 0.05);
    text-decoration: none;
    color: rgb(var(--fg));
    transition: all 0.25s ease;
}

.card:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.75);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
}

.card-desc {
    font-size: 14px;
    color: rgba(60, 60, 67, .7);
}

/* ========= 页脚 ========= */
.site-footer {
    text-align: center;
    padding: 28px 12px;
    color: rgba(60, 60, 67, .6);
    font-size: 14px;
}