/* ========================================
   style.css - 醉忆初见 博客样式
   支持：白天/黑夜双主题、响应式设计
   CSS 变量体系驱动主题切换，只需切换 body.dark-mode 类
   ======================================== */

/* ---------- CSS 变量：白天主题（默认暖色调） ---------- */
:root {
    /* 背景与前景 */
    --bg-primary: #fefaf6;
    --bg-secondary: #fff9f0;
    --bg-card: #ffffff;
    --bg-header: rgba(255, 252, 247, 0.92);
    --bg-footer: #f5efe6;
    --bg-input: #fdf8f2;
    --bg-comment: #fefcf9;
    --bg-comment-nested: #faf6ef;

    /* 文字颜色 */
    --text-primary: #3d3226;
    --text-secondary: #6b5d4f;
    --text-muted: #9b8b78;
    --text-heading: #2c1f0e;
    --text-link: #b8743c;
    --text-link-hover: #8b4f28;

    /* 边框与分割线 */
    --border-color: #e8dccf;
    --border-light: #f0e8db;
    --divider-color: #d4c4ac;

    /* 强调色 */
    --accent: #c78552;
    --accent-light: #e8c9a8;
    --accent-dark: #9b5d32;
    --accent-glow: rgba(199, 133, 82, 0.2);

    /* 标签颜色 */
    --tag-bg: #fdf0e4;
    --tag-text: #b0703c;
    --tag-border: #e8cfb4;

    /* 进度条 */
    --progress-bg: #e8dccf;
    --progress-fill: linear-gradient(90deg, #c78552, #d99b6a, #e8b888);

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(60, 30, 10, 0.06);
    --shadow-md: 0 4px 16px rgba(60, 30, 10, 0.08);
    --shadow-lg: 0 8px 32px rgba(60, 30, 10, 0.1);
    --shadow-card-hover: 0 12px 40px rgba(60, 30, 10, 0.14);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
    --transition-slow: 0.5s ease;

    /* 字体 */
    --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'WenQuanYi Micro Hei', sans-serif;
    --font-heading: 'Noto Serif SC', 'STSong', 'SimSun', 'PingFang SC', serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;

    /* 布局 */
    --max-width: 800px;
    --header-height: 60px;
    --progress-height: 4px;
}

/* ---------- 夜间主题（暗色调，通过 body.dark-mode 覆盖 CSS 变量实现） ---------- */
body.dark-mode {
    --bg-primary: #1a1816;
    --bg-secondary: #1f1c18;
    --bg-card: #252220;
    --bg-header: rgba(26, 24, 22, 0.94);
    --bg-footer: #1c1916;
    --bg-input: #2a2723;
    --bg-comment: #282521;
    --bg-comment-nested: #2e2a26;

    --text-primary: #e0d8ce;
    --text-secondary: #bfb5a6;
    --text-muted: #8c8072;
    --text-heading: #f0e8dc;
    --text-link: #d4a06a;
    --text-link-hover: #e8c090;

    --border-color: #3d3630;
    --border-light: #322d27;
    --divider-color: #4a4038;

    --accent: #d4a06a;
    --accent-light: #5a4030;
    --accent-dark: #e8c090;
    --accent-glow: rgba(212, 160, 106, 0.18);

    --tag-bg: #3a2e22;
    --tag-text: #d4a06a;
    --tag-border: #5a4030;

    --progress-bg: #3d3630;
    --progress-fill: linear-gradient(90deg, #d4a06a, #e0b880, #ecc890);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.45);
}

/* ---------- 全局重置（统一盒模型、去除默认边距、平滑滚动） ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.75;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--text-link-hover);
}

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

/* ---------- 导航栏（顶部固定、毛玻璃效果、主题切换按钮） ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    border-bottom: 1px solid var(--border-light);
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background var(--transition-normal), border-color var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-heading) !important;
    white-space: nowrap;
    letter-spacing: 0.5px;
    transition: color var(--transition-fast);
}

.site-logo:hover {
    color: var(--accent) !important;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    background: none;
    border: none;
    font-family: inherit;
}

.nav-link:hover {
    color: var(--accent);
    background: var(--accent-glow);
}

.nav-link.active {
    color: var(--accent);
    font-weight: 600;
}

/* 主题切换按钮 */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
    box-shadow: var(--shadow-sm);
}

.theme-icon {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(25deg);
}

.refresh-icon {
    display: inline-block;
    transition: transform var(--transition-fast);
}

#btnForceRefresh:hover .refresh-icon {
    transform: rotate(180deg);
}

/* ---------- 主内容区（居中布局，首页 / 详情页共用） ---------- */
.site-main {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 32px 20px 60px;
}

/* Hero 区域（首页标题、副标题、搜索框） */
.hero-section {
    text-align: center;
    padding: 40px 0 32px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: 2px;
    margin-bottom: 8px;
    transition: color var(--transition-normal);
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 6px;
    transition: color var(--transition-normal);
}

.hero-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color var(--transition-normal);
}

.hero-divider {
    width: 60px;
    height: 2px;
    background: var(--accent-light);
    margin: 20px auto 0;
    border-radius: 1px;
    transition: background var(--transition-normal);
}

/* 搜索框（胶囊形输入框，含搜索图标和清除按钮） */
.search-container {
    position: relative;
    max-width: 420px;
    margin: 18px auto 0;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    font-size: 0.9rem;
    pointer-events: none;
    opacity: 0.5;
}

.search-input {
    width: 100%;
    padding: 10px 38px 10px 38px;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: all var(--transition-fast);
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    position: absolute;
    right: 10px;
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.search-clear.visible {
    display: flex;
}

.search-clear:hover {
    background: var(--border-light);
    color: var(--text-primary);
}

/* ---------- 文章卡片（首页文章列表，悬浮上移 + 左侧色条指示器） ---------- */
.articles-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-light);
    border-radius: 0 2px 2px 0;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.article-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
    border-color: var(--accent-light);
}

.article-card:hover::before {
    opacity: 1;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
    transition: color var(--transition-normal);
    line-height: 1.4;
}

.article-card:hover .card-title {
    color: var(--accent);
}

.card-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    transition: color var(--transition-normal);
}

.card-summary {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
    transition: color var(--transition-normal);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-block;
    padding: 3px 10px;
    font-size: 0.75rem;
    background: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
    border-radius: 14px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tag:hover {
    background: var(--accent-light);
    color: var(--accent-dark);
    border-color: var(--accent);
}

.card-read-more {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    transition: all var(--transition-fast);
}

.article-card:hover .card-read-more {
    letter-spacing: 0.5px;
}

/* ---------- 文章详情页（文章内容区域，包含标题/元信息/正文渲染） ---------- */
.detail-main {
    padding-top: 24px;
}

.article-detail {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 32px 36px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    margin-bottom: 32px;
}

.detail-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
    transition: border-color var(--transition-normal);
}

.detail-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 10px;
    line-height: 1.4;
    transition: color var(--transition-normal);
}

.detail-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    transition: color var(--transition-normal);
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.detail-content {
    font-size: 1rem;
    line-height: 2;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.detail-content h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--text-heading);
    margin: 28px 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px dashed var(--border-light);
    transition: all var(--transition-normal);
}

.detail-content h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--text-heading);
    margin: 22px 0 10px;
    transition: color var(--transition-normal);
}

.detail-content p {
    margin-bottom: 16px;
    text-indent: 2em;
}

.detail-content p:first-of-type {
    margin-top: 0;
}

.detail-content blockquote {
    margin: 20px 0;
    padding: 14px 20px;
    border-left: 4px solid var(--accent);
    background: var(--bg-comment);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
    transition: all var(--transition-normal);
}

.detail-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--bg-input);
    padding: 2px 7px;
    border-radius: 3px;
    color: var(--accent-dark);
    transition: all var(--transition-normal);
}

.detail-content pre {
    margin: 20px 0;
    padding: 18px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.detail-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.88rem;
    line-height: 1.7;
}

.detail-content ul,
.detail-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.detail-content li {
    margin-bottom: 8px;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

.detail-content strong {
    color: var(--text-heading);
    font-weight: 700;
}

.detail-content hr {
    margin: 28px 0;
    border: none;
    height: 1px;
    background: var(--border-light);
    transition: background var(--transition-normal);
}

/* ---------- 阅读进度条（详情页顶部固定，随滚动实时变化） ---------- */
.reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--progress-height);
    z-index: 200;
    background: var(--progress-bg);
    transition: background var(--transition-normal);
}

.reading-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--progress-fill);
    border-radius: 0 2px 2px 0;
    transition: width 0.1s linear;
}

/* ---------- 评论区（评论列表、表单、字符计数） ---------- */
.comments-section {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.comments-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
    max-height: 600px;
    overflow-y: auto;
}

.comments-empty {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 20px 0;
    transition: color var(--transition-normal);
}

.comment-item {
    background: var(--bg-comment);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    transition: all var(--transition-normal);
    animation: fadeInUp 0.35s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--accent-dark);
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.comment-author {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-heading);
    transition: color var(--transition-normal);
}

.comment-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: auto;
    transition: color var(--transition-normal);
}

.comment-body {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.7;
    word-break: break-word;
    transition: color var(--transition-normal);
}

.comment-body.sanitized-notice {
    font-style: italic;
    color: var(--text-muted);
}

/* 评论表单 */
.comment-form {
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
    transition: border-color var(--transition-normal);
}

.form-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.form-input {
    flex: 1;
    min-width: 140px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    resize: vertical;
    min-height: 90px;
    transition: all var(--transition-fast);
    outline: none;
}

.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 10px;
    flex-wrap: wrap;
    gap: 8px;
}

.char-count {
    font-size: 0.78rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.char-count.warning {
    color: #e0883d;
}

.char-count.overlimit {
    color: #d4453b;
    font-weight: 600;
}

.btn-submit {
    padding: 10px 22px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-submit:hover {
    background: var(--accent-dark);
    box-shadow: 0 4px 14px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-submit:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-submit:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.form-notice {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
    transition: color var(--transition-normal);
}

/* ---------- 底部 ---------- */
.site-footer {
    background: var(--bg-footer);
    border-top: 1px solid var(--border-light);
    padding: 28px 20px;
    text-align: center;
    transition: all var(--transition-normal);
    margin-top: auto;
}

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

.footer-info {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.8;
    transition: color var(--transition-normal);
}

.footer-info a {
    color: var(--text-link);
    font-weight: 500;
}

.footer-info a:hover {
    text-decoration: underline;
}

.footer-sep {
    margin: 0 8px;
    color: var(--border-color);
}

.copyright {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 2px;
    transition: color var(--transition-normal);
}

.footer-contact {
    margin-bottom: 2px;
}

.footer-statement {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    transition: color var(--transition-normal);
}

/* ---------- 回到顶部按钮 ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

/* ---------- 加载与空状态 ---------- */
.loading-placeholder {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-muted);
}

.empty-state p {
    margin-bottom: 8px;
}

.back-link {
    display: inline-block;
    margin-top: 12px;
    font-weight: 600;
    color: var(--accent);
}

.back-link:hover {
    text-decoration: underline;
}

/* ---------- Toast 提示 ---------- */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 0.88rem;
    font-weight: 500;
    color: #fff;
    background: #3d3226;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.35s ease, toastOut 0.35s ease 1.8s forwards;
    pointer-events: none;
    white-space: nowrap;
}

body.dark-mode .toast {
    background: #e0d8ce;
    color: #1a1816;
}

.toast.success {
    background: #4a8c5c;
    color: #fff;
}

.toast.error {
    background: #c04a3d;
    color: #fff;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(-12px);
    }
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 768px) {
    :root {
        --max-width: 100%;
        --header-height: 52px;
    }

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

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .article-card {
        padding: 18px 16px;
        border-radius: var(--radius-md);
    }

    .card-title {
        font-size: 1.15rem;
    }

    .article-detail {
        padding: 20px 16px;
        border-radius: var(--radius-md);
    }

    .detail-title {
        font-size: 1.5rem;
    }

    .detail-content {
        font-size: 0.95rem;
        line-height: 1.85;
    }

    .detail-content p {
        text-indent: 1.5em;
    }

    .comments-section {
        padding: 20px 16px;
        border-radius: var(--radius-md);
    }

    .form-row {
        flex-direction: column;
        gap: 8px;
    }

    .form-input {
        min-width: 100%;
    }

    .site-nav {
        gap: 2px;
    }

    .nav-link {
        font-size: 0.78rem;
        padding: 5px 8px;
    }

    .theme-text {
        display: none;
    }

    .theme-toggle {
        padding: 6px 10px;
        font-size: 0.8rem;
        border-radius: 16px;
    }

    .back-to-top {
        bottom: 20px;
        right: 16px;
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .header-inner {
        padding: 0 12px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.6rem;
    }

    .detail-title {
        font-size: 1.3rem;
    }

    .article-detail {
        padding: 16px 12px;
    }

    .detail-content {
        font-size: 0.9rem;
        line-height: 1.75;
    }

    .detail-content p {
        text-indent: 1.2em;
    }

    .btn-submit {
        padding: 8px 16px;
        font-size: 0.82rem;
    }

    .site-logo {
        font-size: 1rem;
    }
}