/* ========================================================
   无垠光阴集 - 顶级美学与自适应排版 CSS3
   理念：摒弃繁复，回归文字与图像的本真，高对比度留白
======================================================== */

:root {
    --color-bg: #f7f6f2; /* 宣纸暖白 */
    --color-text-main: #1a1a1a;
    --color-text-muted: #666666;
    --color-accent: #a33b2e; /* 传统朱砂红 */
    --color-border: #e0dcd3;
    --color-surface: #ffffff;
    
    --font-serif: "Songti SC", "Noto Serif SC", STSong, "Times New Roman", serif;
    --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-lg: 12px;
    --radius-sm: 4px;
    --shadow-soft: 0 10px 30px rgba(0,0,0,0.04);
    --shadow-hover: 0 15px 40px rgba(163,59,46,0.08);
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-serif); /* 全局使用衬线字体提升高级感 */
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 核心自适应宽度：640, 960, 1280 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
@media (max-width: 1300px) { .container { max-width: 960px; } }
@media (max-width: 1000px) { .container { max-width: 640px; } }

/* 头部导航 */
.header {
    border-bottom: 1px solid var(--color-border);
    padding: 2rem 0;
    margin-bottom: 3rem;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 2px;
}
.logo span {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-family: var(--font-sans);
    font-weight: 300;
}
.nav-links span {
    margin-left: 2rem;
    cursor: pointer;
    font-size: 1.1rem;
    position: relative;
    transition: color 0.3s;
}
.nav-links span:hover { color: var(--color-accent); }

/* 焦点演进板块 (每日动态更新) */
.daily-spotlight {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: 5rem;
    transition: transform 0.4s ease;
}
.daily-spotlight:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.spotlight-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.spotlight-text {
    padding: 2rem;
}
.date-display {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--color-accent);
    letter-spacing: 4px;
    margin-bottom: 2rem;
    text-transform: uppercase;
}
.spotlight-text h3 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}
.spotlight-text .poetry {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
    text-align: justify;
    line-height: 2;
}
.author-tag {
    font-style: italic;
    color: #999;
}

@media (max-width: 1000px) {
    .daily-spotlight {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .spotlight-image img { height: 350px; }
}

/* 图文画廊板块 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
}
.section-title h2 {
    font-size: 2rem;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}
.section-title h2 span {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--color-border);
    margin-left: 10px;
    font-weight: 300;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0; left: 50%; transform: translateX(-50%);
    width: 40px; height: 2px;
    background: var(--color-accent);
}
.section-title p {
    margin-top: 10px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-bottom: 5rem;
}
.gallery-card {
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
}
.gallery-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.08);
}
.gallery-card img {
    width: 100%;
    height: 350px;
    object-fit: cover;
}
.card-content {
    padding: 1.5rem;
}
.card-content h4 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
}
.card-content p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.8;
}

/* 高级日历网格排版 */
.calendar-section {
    margin-bottom: 5rem;
}
.calendar-wrapper {
    background: var(--color-surface);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}
.calendar-header {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-accent);
}
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    border-top: 1px solid var(--color-border);
    border-left: 1px solid var(--color-border);
}
.cal-day-name {
    text-align: center;
    padding: 1rem 0;
    background: #fdfbf7;
    font-family: var(--font-sans);
    font-weight: bold;
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-muted);
}
.cal-cell {
    min-height: 120px;
    padding: 1rem;
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    transition: background 0.3s;
}
.cal-cell:hover { background: #faf9f6; }
.cal-cell.empty { background: transparent; }
.cal-cell .date {
    display: block;
    font-size: 1.5rem;
    font-family: var(--font-sans);
    font-weight: 300;
}
.cal-cell .lunar {
    display: block;
    font-size: 0.8rem;
    color: #999;
    margin-top: 5px;
}
.cal-cell.active {
    background: #fff8f6;
    border-top: 3px solid var(--color-accent);
}
.cal-cell.highlight .date {
    color: var(--color-accent);
    font-weight: bold;
}
.cal-cell .mark {
    position: absolute;
    bottom: 10px; right: 10px;
    font-size: 0.75rem;
    background: var(--color-accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 12px;
}
@media (max-width: 768px) {
    .calendar-wrapper { padding: 1rem; }
    .cal-cell { min-height: 80px; padding: 0.5rem; }
    .cal-cell .date { font-size: 1.2rem; }
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 4rem 0;
    border-top: 1px solid var(--color-border);
    font-family: var(--font-sans);
}
.footer p { color: var(--color-text-main); font-size: 0.95rem; }
.footer .sub-footer { color: #999; margin-top: 0.5rem; font-size: 0.85rem; font-family: var(--font-serif); }