:root {
    --primary: #2d5a4a;
    --primary-dark: #1e3d32;
    --secondary: #f5f1eb;
    --accent: #c45c48;
    --background: #faf8f5;
    --text: #2c2c2c;
    --text-light: #666666;
    --gold: #b8956e;
    --border: #e8e4de;
    --shadow: rgba(45, 90, 74, 0.1);
    --font-serif: "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--text);
    line-height: 1.8;
    font-size: 16px;
}

::selection {
    background-color: var(--primary);
    color: white;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent);
}

img {
    max-width: 100%;
    height: auto;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow);
    padding: 12px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo::before {
    content: "📖";
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--text);
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s ease;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    background: linear-gradient(180deg, var(--secondary) 0%, var(--background) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 30%, var(--primary) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, var(--gold) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--primary);
    color: white;
    font-size: 0.85rem;
    border-radius: 30px;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: 8px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 2;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: var(--primary);
    color: white;
    font-size: 1rem;
    border-radius: 50px;
    transition: all 0.3s ease;
    border: 2px solid var(--primary);
}

.hero-cta:hover {
    background: transparent;
    color: var(--primary);
    transform: translateY(-2px);
}

.hero-decoration {
    position: absolute;
    font-size: 200px;
    opacity: 0.03;
    color: var(--primary);
    font-family: var(--font-serif);
}

.hero-decoration.left {
    left: 5%;
    top: 20%;
}

.hero-decoration.right {
    right: 5%;
    bottom: 20%;
}

.quote-section {
    padding: 80px 24px;
    background: var(--primary);
    color: white;
    text-align: center;
}

.quote-content {
    max-width: 800px;
    margin: 0 auto;
}

.quote-icon {
    font-size: 3rem;
    opacity: 0.5;
    margin-bottom: 20px;
}

.quote-text {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    line-height: 1.8;
    margin-bottom: 20px;
    font-style: italic;
}

.quote-author {
    font-size: 1rem;
    opacity: 0.8;
}

.section {
    padding: 100px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-light);
}

.section-divider {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--gold));
    margin: 20px auto 0;
    border-radius: 2px;
}

.featured-articles {
    background: var(--background);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.article-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--shadow);
    border-color: var(--primary);
}

.article-card-image {
    height: 200px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--border) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.6;
}

.article-card-content {
    padding: 25px;
}

.article-card-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--secondary);
    color: var(--primary);
    font-size: 0.75rem;
    border-radius: 20px;
    margin-bottom: 15px;
}

.article-card-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-excerpt {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 15px;
}

.article-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
}

.categories-section {
    background: var(--secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: white;
    padding: 40px 30px;
    text-align: center;
    border-radius: 12px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.category-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.category-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

.timeline-section {
    background: var(--background);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: 45%;
    padding: 25px;
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    position: relative;
}

.timeline-content::before {
    content: "";
    position: absolute;
    top: 50%;
    width: 20px;
    height: 2px;
    background: var(--primary);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: -20px;
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: -20px;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--background);
}

.timeline-date {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--gold);
    margin-bottom: 8px;
}

.timeline-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

.footer {
    background: var(--primary);
    color: white;
    padding: 60px 24px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-desc {
    font-size: 0.9rem;
    opacity: 0.8;
    line-height: 1.7;
}

.footer-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: white;
    opacity: 0.8;
    font-size: 0.9rem;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.7;
}

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

.footer-bottom a:hover {
    color: inherit;
}

.footer-bottom img {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

.footer-records {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    column-gap: 20px;
    row-gap: 8px;
    margin-top: 10px;
}

.footer-record-link {
    display: inline-flex;
    align-items: center;
    color: inherit;
    text-decoration: none;
    line-height: 1.5;
    white-space: nowrap;
}

.footer-record-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-record-link img,
.footer-record-badge img {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    vertical-align: middle;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--shadow);
    border: none;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.page-header {
    padding: 160px 24px 80px;
    background: linear-gradient(180deg, var(--secondary) 0%, var(--background) 100%);
    text-align: center;
}

.page-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.filter-tab {
    padding: 10px 25px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: var(--text);
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.article-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.article-list .article-card .article-card-image {
    height: 180px;
}

.article-detail {
    padding: 160px 24px 80px;
}

.article-header {
    text-align: center;
    margin-bottom: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.article-category {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary);
    color: white;
    font-size: 0.8rem;
    border-radius: 20px;
    margin-bottom: 25px;
}

.article-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    color: var(--text);
    margin-bottom: 20px;
    line-height: 1.4;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-body {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text);
}

.article-body p {
    margin-bottom: 1.5em;
    text-align: justify;
}

.article-body h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--primary);
    margin: 2em 0 1em;
}

.article-body blockquote {
    margin: 2em 0;
    padding: 25px 30px;
    background: var(--secondary);
    border-left: 4px solid var(--primary);
    font-style: italic;
    border-radius: 0 8px 8px 0;
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

.article-highlight {
    margin: 3em 0;
    padding: 30px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 12px;
    text-align: center;
}

.article-highlight-text {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    line-height: 1.8;
    font-style: italic;
}

.article-comment {
    margin: 3em 0;
    padding: 30px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.article-comment-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.article-comment-title::before {
    content: "✍️";
}

.article-comment-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text);
}

.related-articles {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.related-articles-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 30px;
    text-align: center;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 25px;
}

.about-text p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text);
    margin-bottom: 20px;
}

.about-image {
    height: 400px;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--border) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: var(--primary);
    opacity: 0.5;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.value-card {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.value-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.value-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

@media (max-width: 992px) {
    .article-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
        letter-spacing: 4px;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .article-grid,
    .article-list {
        grid-template-columns: 1fr;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
    }

    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px;
    }

    .timeline-content::before {
        left: -20px !important;
        right: auto !important;
    }

    .timeline-dot {
        left: 20px;
    }

    .article-title {
        font-size: 1.8rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 10px;
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 24px;
    }

    .page-header {
        padding: 120px 24px 60px;
    }

    .page-title {
        font-size: 2rem;
    }

    .footer-records {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .footer-record-link {
        justify-content: center;
    }
}


.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: white;
    z-index: 1001;
    padding: 80px 30px 30px;
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px var(--shadow);
}

.mobile-nav.open {
    right: 0;
}

.mobile-nav-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
}

.mobile-nav-links {
    list-style: none;
}

.mobile-nav-links li {
    margin-bottom: 20px;
}

.mobile-nav-links a {
    font-size: 1.1rem;
    color: var(--text);
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.mobile-nav-links a:hover {
    color: var(--primary);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

.animate-delay-3 {
    animation-delay: 0.3s;
}