/* ===== 基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #faf8f5;
    --color-text: #3a3a3a;
    --color-text-light: #6b6b6b;
    --color-accent: #8b7355;
    --color-accent-dark: #6b5740;
    --color-border: #e0d5c5;
    --color-white: #ffffff;
    --color-tag-bg: #f0e8dc;
    --color-hero-overlay: rgba(0, 0, 0, 0.45);
    --font-serif: "Noto Serif SC", "Source Han Serif SC", "SimSun", "宋体", serif;
    --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.8;
    min-height: 100vh;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ===== 顶部导航 ===== */
.header {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    text-align: center;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0.3;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-dark);
    letter-spacing: 0.15em;
}

.subtitle {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-top: 0.3rem;
    letter-spacing: 0.3em;
}

.nav {
    margin-top: 1.2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav a {
    font-size: 0.95rem;
    color: var(--color-text-light);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    transition: var(--transition);
}

.nav a:hover,
.nav-active {
    color: var(--color-accent-dark);
    background: var(--color-tag-bg);
}

/* ===== 主横幅 ===== */
.hero {
    background: linear-gradient(135deg, #6b5740 0%, #8b7355 50%, #a89279 100%);
    padding: 4rem 2rem;
    text-align: center;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h2 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.05rem;
    opacity: 0.9;
    line-height: 2;
}

/* ===== 主内容区 ===== */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

.section {
    margin-bottom: 3rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    text-align: center;
    color: var(--color-accent-dark);
    margin-bottom: 2rem;
    letter-spacing: 0.08em;
}

/* ===== 文章卡片 ===== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.article-thumb {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-tag-bg), #e8ddd0);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-thumb img {
    transform: scale(1.05);
}

.article-info {
    padding: 1.5rem;
}

.article-tag {
    display: inline-block;
    background: var(--color-tag-bg);
    color: var(--color-accent);
    font-size: 0.8rem;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    margin-bottom: 0.6rem;
}

.article-info h4 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.article-info h4 a {
    color: var(--color-text);
}

.article-info h4 a:hover {
    color: var(--color-accent);
}

.article-date {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.article-excerpt {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== 文章页 ===== */
.article-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

.article-header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.article-header h1 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent-dark);
    margin-bottom: 0.8rem;
    line-height: 1.5;
}

.article-meta {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.article-meta span {
    margin: 0 0.8rem;
}

.article-body {
    font-size: 1.05rem;
    line-height: 2;
}

.article-body p {
    margin-bottom: 1.2rem;
    text-indent: 2em;
}

.article-body h2 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-accent-dark);
    margin: 2rem 0 1rem;
    padding-left: 1rem;
    border-left: 3px solid var(--color-accent);
    text-indent: 0;
}

.article-body h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--color-accent);
    margin: 1.5rem 0 0.8rem;
    text-indent: 0;
}

.article-body blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background: var(--color-tag-bg);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 4px 4px 0;
    color: var(--color-text-light);
    font-style: italic;
    text-indent: 0;
}

.article-body img {
    max-width: 100%;
    border-radius: 4px;
    margin: 1.5rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.article-body ul, .article-body ol {
    margin: 1rem 0;
    padding-left: 2em;
    text-indent: 0;
}

.article-body li {
    margin-bottom: 0.5rem;
}

/* ===== 关于页 ===== */
.about-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
    text-align: center;
}

.about-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--color-tag-bg);
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-accent);
}

.about-page h2 {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--color-accent-dark);
    margin-bottom: 1rem;
}

.about-page p {
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: 1rem;
}

/* ===== 底部 ===== */
.footer {
    background: #2a2420;
    color: #a09688;
    padding: 2.5rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: #c4b8a8;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.footer-desc {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.footer-icp {
    font-size: 0.75rem;
    line-height: 1.8;
    opacity: 0.6;
    max-width: 900px;
    margin: 0 auto;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .logo {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .nav {
        gap: 1rem;
    }

    .hero {
        padding: 2.5rem 1.5rem;
    }

    .hero h2 {
        font-size: 1.4rem;
    }

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

    .main-content {
        padding: 1.5rem 1rem 3rem;
    }

    .article-page {
        padding: 1.5rem 1rem 3rem;
    }

    .article-header h1 {
        font-size: 1.5rem;
    }

    .footer-icp {
        font-size: 0.7rem;
    }
}