/* ===== 基础变量 ===== */
:root {
    --primary: #8B0000;
    --primary-light: #DC143C;
    --gold: #DAA520;
    --gold-light: #F0C75E;
    --ink: #1a1a1a;
    --paper: #FAF8F0;
    --paper-dark: #F0EDE0;
    --text: #333;
    --text-light: #666;
    --border: #e0d5c0;
    --shadow: rgba(139, 0, 0, 0.1);
    --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

/* ===== 重置与基础 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text);
    background: var(--paper);
    line-height: 1.8;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* ===== 顶部导航 ===== */
.site-header {
    background: linear-gradient(180deg, var(--primary) 0%, #6B0000 100%);
    color: #fff;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 4px;
}

.subtitle {
    font-size: 0.75rem;
    opacity: 0.8;
    letter-spacing: 2px;
}

.main-nav {
    display: flex;
    gap: 5px;
}

.main-nav a {
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.95rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(255,255,255,0.15);
    color: var(--gold-light);
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 4px;
    border: 1px solid rgba(255,255,255,0.2);
}

.search-box input {
    background: transparent;
    border: none;
    color: #fff;
    padding: 6px 12px;
    font-size: 0.9rem;
    width: 150px;
    outline: none;
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.5);
}

.search-box button {
    background: var(--gold);
    border: none;
    padding: 6px 12px;
    border-radius: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.search-box button:hover {
    background: var(--gold-light);
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    padding: 100px 20px;
    text-align: center;
    background: var(--paper);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(139,0,0,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(218,165,32,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero h2 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 15px;
    line-height: 1.5;
}

.hero > .hero-content > p {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 40px;
    letter-spacing: 2px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--primary);
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    letter-spacing: 2px;
}

.hero-decoration {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.seal {
    width: 100px;
    height: 100px;
    background: var(--primary);
    color: var(--gold-light);
    font-family: var(--font-serif);
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 4px;
    transform: rotate(-15deg);
    border-radius: 8px;
    box-shadow: 0 4px 20px var(--shadow);
    opacity: 0.15;
}

/* ===== 每日经典 ===== */
.daily-quote {
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--paper) 0%, var(--paper-dark) 100%);
}

.quote-card {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 30px var(--shadow);
    border: 1px solid var(--border);
    text-align: center;
    position: relative;
}

.quote-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 30px;
    font-size: 6rem;
    font-family: var(--font-serif);
    color: var(--primary);
    opacity: 0.1;
    line-height: 1;
}

.quote-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.quote-icon {
    font-size: 1.5rem;
}

.quote-header h3 {
    font-family: var(--font-serif);
    color: var(--primary);
    letter-spacing: 4px;
    font-size: 1.2rem;
}

blockquote {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--ink);
    line-height: 2;
    margin: 20px 0;
    letter-spacing: 2px;
}

cite {
    display: block;
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.quote-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.quote-nav button {
    background: transparent;
    border: 1px solid var(--border);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    color: var(--primary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.quote-nav button:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== 分类区域 ===== */
.category-section {
    padding: 80px 20px;
}

.alt-bg {
    background: var(--paper-dark);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 10px;
}

.section-desc {
    color: var(--text-light);
    font-size: 1rem;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.divider-dot {
    width: 6px;
    height: 6px;
    background: var(--gold);
    border-radius: 50%;
}

.divider-line {
    width: 60px;
    height: 1px;
    background: var(--border);
}

/* ===== 书籍卡片网格 ===== */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.book-card {
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.book-card:hover {
    transform: translateY(-8px);
}

.book-cover {
    width: 140px;
    height: 180px;
    margin: 0 auto 15px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 4px 4px 15px rgba(0,0,0,0.2), -2px -2px 8px rgba(255,255,255,0.1) inset;
    position: relative;
    transition: box-shadow 0.3s ease;
}

.book-card:hover .book-cover {
    box-shadow: 6px 6px 25px rgba(0,0,0,0.3), -2px -2px 8px rgba(255,255,255,0.1) inset;
}

.book-cover::after {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255,255,255,0.15);
}

.book-char {
    font-family: var(--font-serif);
    font-size: 3rem;
    color: rgba(255,255,255,0.9);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    letter-spacing: 0;
}

.book-card h4 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--ink);
    margin-bottom: 5px;
    letter-spacing: 2px;
}

.book-card p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== 诗词展示 ===== */
.poetry-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.poem-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 15px var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.poem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--gold));
}

.poem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow);
}

.poem-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, #fff 0%, #FFF8E7 100%);
}

.poem-dynasty {
    display: inline-block;
    background: var(--primary);
    color: var(--gold-light);
    font-family: var(--font-serif);
    padding: 3px 12px;
    border-radius: 3px;
    font-size: 0.8rem;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.poem-card h4 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--ink);
    margin-bottom: 5px;
    letter-spacing: 3px;
}

.poem-author {
    font-size: 0.9rem;
    color: var(--text-light);
    display: block;
    margin-bottom: 15px;
}

.poem-text p {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 2.2;
    color: var(--ink);
    letter-spacing: 1px;
}

/* ===== 导读时间线 ===== */
.guides-section {
    padding: 80px 20px;
    background: var(--paper);
}

.guide-timeline {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.guide-timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--gold));
}

.guide-item {
    display: flex;
    align-items: flex-start;
    gap: 25px;
    margin-bottom: 30px;
    position: relative;
}

.guide-number {
    width: 80px;
    height: 80px;
    min-width: 80px;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--primary);
    z-index: 2;
    box-shadow: 0 2px 10px var(--shadow);
}

.guide-content {
    background: #fff;
    padding: 20px 25px;
    border-radius: 8px;
    border: 1px solid var(--border);
    flex: 1;
    box-shadow: 0 2px 10px var(--shadow);
}

.guide-content h4 {
    font-family: var(--font-serif);
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.guide-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ===== 页脚 ===== */
.site-footer {
    background: linear-gradient(180deg, #2a0000 0%, #1a0000 100%);
    color: rgba(255,255,255,0.8);
    padding: 60px 20px 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.footer-brand h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--gold-light);
    letter-spacing: 4px;
    margin-bottom: 10px;
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-col h4 {
    color: var(--gold-light);
    font-size: 0.95rem;
    letter-spacing: 2px;
    margin-bottom: 5px;
}

.footer-col a {
    font-size: 0.9rem;
    opacity: 0.7;
    transition: opacity 0.3s, color 0.3s;
}

.footer-col a:hover {
    opacity: 1;
    color: var(--gold-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.85rem;
    opacity: 0.5;
    letter-spacing: 2px;
}

/* ===== 书籍详情页 ===== */
.book-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.book-detail-header {
    text-align: center;
    margin-bottom: 50px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border);
}

.book-detail-header h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--primary);
    letter-spacing: 8px;
    margin-bottom: 10px;
}

.book-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: var(--text-light);
    font-size: 0.95rem;
}

.book-detail-content {
    font-family: var(--font-serif);
    line-height: 2.4;
    font-size: 1.1rem;
    color: var(--ink);
}

.book-detail-content h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin: 40px 0 20px;
    letter-spacing: 4px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.book-detail-content p {
    margin-bottom: 20px;
    text-indent: 2em;
}

.book-detail-content .original {
    background: var(--paper-dark);
    padding: 20px 30px;
    border-radius: 8px;
    border-left: 3px solid var(--gold);
    margin: 20px 0;
}

.book-detail-content .translation {
    color: var(--text-light);
    font-size: 1rem;
    padding-left: 20px;
    border-left: 2px solid var(--border);
    margin: 15px 0 25px;
}

.back-link {
    display: inline-block;
    margin-bottom: 30px;
    color: var(--primary);
    font-size: 0.95rem;
    letter-spacing: 1px;
}

.back-link:hover {
    color: var(--gold);
}

/* ===== 关于页面 ===== */
.about-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 20px;
}

.about-page h1 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--primary);
    letter-spacing: 6px;
    text-align: center;
    margin-bottom: 40px;
}

.about-page h2 {
    font-family: var(--font-serif);
    color: var(--primary);
    margin: 30px 0 15px;
    letter-spacing: 3px;
}

.about-page p {
    line-height: 2;
    margin-bottom: 15px;
    color: var(--text);
}

/* ===== 搜索结果 ===== */
.search-results {
    display: none;
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    padding: 20px;
    z-index: 999;
    width: 400px;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border);
}

.search-results.active {
    display: block;
}

.search-result-item {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.2s;
}

.search-result-item:hover {
    background: var(--paper-dark);
}

.search-result-item h5 {
    font-family: var(--font-serif);
    color: var(--primary);
    margin-bottom: 4px;
}

.search-result-item p {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h2 {
        font-size: 1.4rem;
        letter-spacing: 3px;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-num {
        font-size: 1.8rem;
    }
    
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 20px;
    }
    
    .book-cover {
        width: 110px;
        height: 140px;
    }
    
    .book-char {
        font-size: 2.2rem;
    }
    
    .poem-card.featured {
        grid-column: span 1;
    }
    
    .poetry-showcase {
        grid-template-columns: 1fr;
    }
    
    .guide-timeline::before {
        left: 30px;
    }
    
    .guide-number {
        width: 60px;
        height: 60px;
        min-width: 60px;
        font-size: 1.2rem;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        gap: 30px;
    }
    
    .search-results {
        width: 90%;
    }
    
    blockquote {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 15px;
    }
    
    .category-section {
        padding: 50px 15px;
    }
    
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}