/* Esspace 官网主题样式
 * 现代化企业级 CMS 产品展示样式
 * 设计原则：简洁专业、性能优先、零外部依赖
 */

/* ===== CSS 变量 ===== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-accent: #0ea5e9;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-success: #10b981;
    --color-warning: #f59e0b;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --container-max: 1200px;
    --header-height: 64px;

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ===== Container ===== */
.container {
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* ===== Header ===== */
.site-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.25rem;
}

.header-logo:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
}

.logo-text {
    letter-spacing: -0.02em;
}

.header-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0.5rem 0.875rem;
    color: var(--color-text-light);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
    text-decoration: none;
}

.nav-item-has-children > .nav-link::after {
    content: "▾";
    margin-left: 0.25rem;
    font-size: 0.75em;
    opacity: 0.6;
}

.sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition);
}

.nav-item:hover .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sub-menu-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: var(--color-text-light);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.sub-menu-link:hover {
    color: var(--color-primary);
    background: var(--color-bg-alt);
    text-decoration: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 5rem 0 4rem;
    overflow: hidden;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, #fff 100%);
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
    opacity: 0.5;
    pointer-events: none;
}

.hero-container {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    max-width: 540px;
}

.hero-eyebrow {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1.25rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin-bottom: 1.25rem;
}

.hero-title .highlight {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* ===== Section Common ===== */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3rem;
}

.section-eyebrow {
    display: inline-block;
    color: var(--color-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== Features ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 2rem;
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-title {
    font-size: 1.1875rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.625rem;
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== Stats ===== */
.stats {
    background: var(--color-bg-dark);
    color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem 0;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 0.9375rem;
    color: #94a3b8;
    margin-top: 0.5rem;
}

/* ===== Advantages ===== */
.advantages-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.advantage-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.advantage-item-reverse .advantage-image {
    order: 2;
}

.advantage-image {
    position: relative;
}

.advantage-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.advantage-stat {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--color-primary);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: var(--shadow-md);
}

.advantage-stat span {
    font-size: 0.875rem;
    font-weight: 500;
    margin-left: 0.125rem;
}

.advantage-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--color-primary);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.advantage-eyebrow svg {
    width: 16px;
    height: 16px;
}

.advantage-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.875rem;
}

.advantage-desc {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.advantage-points {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.advantage-points li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.advantage-points li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--color-success);
    color: #fff;
    border-radius: 50%;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* ===== CTA ===== */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: #fff;
    text-align: center;
    padding: 4rem 0;
}

.cta-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta .btn-primary {
    background: #fff;
    color: var(--color-primary);
}

.cta .btn-primary:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary-dark);
}

.cta .btn-secondary {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    color: #fff;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    padding: 3rem 0;
}

/* ===== Article List ===== */
.list-header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.list-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.list-description {
    color: var(--color-text-light);
    font-size: 1.0625rem;
}

.list-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 820px;
    margin: 0 auto;
}

.list-item {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: all var(--transition);
}

.list-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.list-item-title {
    font-size: 1.3125rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.list-item-title a {
    color: var(--color-text);
}

.list-item-title a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.list-item-meta {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: 0.75rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.term-tag {
    display: inline-block;
    padding: 0.125rem 0.625rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.list-item-excerpt {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0.875rem;
}

.list-item-readmore {
    font-size: 0.875rem;
    font-weight: 600;
}

.list-empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: 4rem 0;
}

/* ===== Article Detail ===== */
.article-container {
    max-width: 820px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.article-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 1.25rem;
}

.article-meta {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.article-terms {
    margin-bottom: 1rem;
    text-align: center;
}

.article-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: center;
}

/* ===== Article Content (Markdown 渲染区) ===== */
.article-content,
.article-content.prose {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--color-text);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* --- 标题层级 --- */
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.3;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

.article-content h1 {
    font-size: 1.875rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
}

.article-content h2 {
    font-size: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.article-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
}

.article-content h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-light);
}

.article-content h6 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 标题锚点链接（hover 显示 #） */
.article-content h1[id] > a,
.article-content h2[id] > a,
.article-content h3[id] > a,
.article-content h4[id] > a,
.article-content h5[id] > a,
.article-content h6[id] > a {
    color: inherit;
    text-decoration: none;
    margin-left: 0.5rem;
    opacity: 0;
    transition: opacity var(--transition);
}

.article-content h1[id]:hover > a,
.article-content h2[id]:hover > a,
.article-content h3[id]:hover > a,
.article-content h4[id]:hover > a,
.article-content h5[id]:hover > a,
.article-content h6[id]:hover > a {
    opacity: 1;
}

.article-content h1[id] > a::before,
.article-content h2[id] > a::before,
.article-content h3[id] > a::before,
.article-content h4[id] > a::before,
.article-content h5[id] > a::before,
.article-content h6[id] > a::before {
    content: "#";
    color: var(--color-text-muted);
}

/* --- 段落与文本 --- */
.article-content p {
    margin-bottom: 1.25rem;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-color: rgba(37, 99, 235, 0.3);
    text-underline-offset: 2px;
    text-decoration-thickness: 1px;
    transition: all var(--transition);
}

.article-content a:hover {
    color: var(--color-primary-dark);
    text-decoration-color: var(--color-primary-dark);
}

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

.article-content em {
    font-style: italic;
}

.article-content del,
.article-content s {
    color: var(--color-text-muted);
    text-decoration: line-through;
}

.article-content mark {
    background: #fef08a;
    color: #713f12;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
}

.article-content kbd {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8125em;
    line-height: 1.4;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-bottom-width: 2px;
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

.article-content abbr[title] {
    text-decoration: underline dotted;
    cursor: help;
}

.article-content sub {
    font-size: 0.75em;
    vertical-align: sub;
}

.article-content sup {
    font-size: 0.75em;
    vertical-align: super;
}

/* --- 分割线 --- */
.article-content hr {
    margin: 2.5rem 0;
    border: 0;
    border-top: 2px solid var(--color-border);
    position: relative;
}

.article-content hr::after {
    content: "§";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-bg);
    color: var(--color-text-muted);
    padding: 0 0.875rem;
    font-size: 0.875rem;
}

/* --- 列表 --- */
.article-content ul,
.article-content ol {
    margin: 0 0 1.25rem;
    padding-left: 1.75rem;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content ul ul,
.article-content ol ol,
.article-content ul ol,
.article-content ol ul {
    margin: 0.5rem 0 0.5rem;
}

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

.article-content li::marker {
    color: var(--color-primary);
}

/* 任务列表（GFM Task List） */
.article-content ul:has(> li > input[type="checkbox"]),
.article-content li:has(> input[type="checkbox"]) {
    list-style: none;
    padding-left: 0;
}

.article-content ul li:has(> input[type="checkbox"]) {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
}

.article-content li > input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 1.125rem;
    height: 1.125rem;
    margin: 0.3rem 0 0;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--transition);
    position: relative;
}

.article-content li > input[type="checkbox"]:checked {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.article-content li > input[type="checkbox"]:checked::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
}

.article-content li:has(> input[type="checkbox"]:checked) {
    color: var(--color-text-muted);
    text-decoration: line-through;
}

/* --- 引用块 --- */
.article-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding: 0.75rem 1.25rem;
    margin: 1.5rem 0;
    color: var(--color-text-light);
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content blockquote > :last-child {
    margin-bottom: 0;
}

.article-content blockquote blockquote {
    margin: 0.75rem 0;
    border-left-color: var(--color-accent);
}

.article-content blockquote p {
    margin-bottom: 0.75rem;
}

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

/* --- 代码 --- */
.article-content code {
    background: var(--color-border-light);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-size: 0.875em;
    font-family: var(--font-mono);
    color: #db2777;
}

.article-content pre {
    background: var(--color-bg-dark);
    color: #e2e8f0;
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-size: 0.875rem;
    line-height: 1.6;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.article-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
    border-radius: 0;
}

/* 代码块滚动条优化 */
.article-content pre::-webkit-scrollbar {
    height: 6px;
}

.article-content pre::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.article-content pre::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.article-content pre::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* --- 表格 --- */
.article-content .table-wrap {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9375rem;
    display: table;
}

.article-content .table-wrap > table {
    margin: 0;
    border: 0;
}

.article-content th,
.article-content td {
    border: 1px solid var(--color-border);
    padding: 0.75rem 1rem;
    text-align: left;
}

.article-content th {
    background: var(--color-bg-alt);
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
}

.article-content thead tr {
    border-bottom: 2px solid var(--color-border);
}

.article-content tbody tr:nth-child(even) {
    background: var(--color-bg-alt);
}

.article-content tbody tr:hover {
    background: var(--color-primary-light);
}

.article-content td > :last-child {
    margin-bottom: 0;
}

/* --- 图片与图注 --- */
.article-content img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.article-content figure {
    margin: 1.5rem 0;
    text-align: center;
}

.article-content figure img {
    margin: 0 auto;
}

.article-content figcaption {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* --- 脚注（Footnote） --- */
.article-content .footnotes {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.article-content .footnotes ol {
    padding-left: 1.5rem;
}

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

.article-content sup > a[href^="#fn"],
.article-content .footnote-ref a {
    font-size: 0.75em;
    color: var(--color-primary);
    text-decoration: none;
    padding: 0 0.125rem;
}

.article-content sup > a[href^="#fn"]:hover,
.article-content .footnote-ref a:hover {
    text-decoration: underline;
}

.article-content .footnote-backref,
.article-content a[href^="#fnref"] {
    color: var(--color-primary);
    text-decoration: none;
    margin-left: 0.25rem;
}

.article-content .footnote-backref:hover,
.article-content a[href^="#fnref"]:hover {
    text-decoration: underline;
}

/* --- 目录（TOC） --- */
.article-content .toc,
.article-content #toc {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0 2rem;
}

.article-content .toc-title,
.article-content .toc > p:first-child {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.article-content .toc ul,
.article-content #toc ul {
    margin: 0;
    padding-left: 1.25rem;
}

.article-content .toc li {
    margin-bottom: 0.375rem;
}

.article-content .toc a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9375rem;
}

.article-content .toc a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* --- 定义列表 --- */
.article-content dl {
    margin: 1.5rem 0;
    padding: 1rem 1.25rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
}

.article-content dt {
    font-weight: 700;
    color: var(--color-text);
    margin-top: 0.75rem;
}

.article-content dt:first-child {
    margin-top: 0;
}

.article-content dd {
    margin: 0.375rem 0 0 1.25rem;
    color: var(--color-text-light);
}

/* --- 嵌套末尾元素去除多余间距 --- */
.article-content > :last-child,
.article-content li > :last-child,
.article-content td > :last-child,
.article-content blockquote > :last-child {
    margin-bottom: 0;
}

.article-footer {
    margin-top: 3rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.pagination-pages {
    display: flex;
    gap: 0.25rem;
}

.pagination-item a,
.pagination-current,
.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.pagination-item a {
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.pagination-item a:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

.pagination-current {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
}

.pagination-ellipsis {
    color: var(--color-text-muted);
}

.pagination-prev, .pagination-next {
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0 0.75rem;
}

.pagination-disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-bg-dark);
    color: #cbd5e1;
    padding: 3.5rem 0 1.5rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-brand {
    max-width: 360px;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.875rem;
}

.footer-desc {
    font-size: 0.875rem;
    line-height: 1.7;
    color: #94a3b8;
    margin-bottom: 1.25rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social .social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.08);
    color: #cbd5e1;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition);
}

.footer-social .social-link:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.footer-heading {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1rem;
}

.footer-nav li {
    margin-bottom: 0.625rem;
}

.footer-nav a {
    font-size: 0.875rem;
    color: #94a3b8;
}

.footer-nav a:hover {
    color: #fff;
    text-decoration: none;
}

.footer-contact p {
    font-size: 0.875rem;
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8125rem;
    color: #64748b;
}

/* ===== Friend Links ===== */
.friend-links {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border-light);
    padding: 2rem 0;
}

.friend-links-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.friend-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.friend-link {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--color-text-light);
    transition: all var(--transition);
}

.friend-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

/* ===== Article Breadcrumb / Tags / Share ===== */
.article-breadcrumb {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
}

.breadcrumb-item {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumb-item:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.breadcrumb-sep {
    color: var(--color-text-muted);
}

.article-reading-time {
    color: var(--color-text-muted);
}

.article-reading-time::before {
    content: "·";
    margin-right: 0.5rem;
}

.article-tags {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.625rem;
}

.tags-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.tag-link {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 999px;
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    font-size: 0.8125rem;
    text-decoration: none;
    transition: all var(--transition);
}

.tag-link:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

.article-share {
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.share-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.share-link:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* ===== List Card Link ===== */
.list-card-link {
    display: inline-block;
    margin-top: 0.75rem;
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.list-card-link:hover {
    color: var(--color-primary-dark);
    transform: translateX(4px);
}

.list-empty p {
    margin-bottom: 1rem;
}

.list-empty .btn {
    margin-top: 0.5rem;
}

/* ===== 404 Page ===== */
.error-section {
    padding: 6rem 0;
    text-align: center;
}

.error-content {
    max-width: 640px;
    margin: 0 auto;
}

.error-code {
    font-size: 8rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.error-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.875rem;
}

.error-desc {
    font-size: 1.0625rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.error-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Scroll Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: all var(--transition);
    opacity: 0;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .advantage-item,
    .advantage-item-reverse {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .advantage-item-reverse .advantage-image {
        order: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 1.5rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }

    .header-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-link {
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--color-border-light);
    }

    .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: 1rem;
    }

    .menu-toggle {
        display: flex;
    }

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.625rem;
    }

    .hero {
        padding: 3rem 0 2rem;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

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

    .article-title {
        font-size: 1.625rem;
    }

    .list-title {
        font-size: 1.75rem;
    }

    .advantages-list {
        gap: 3rem;
    }

    .pagination {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

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

/* ===== Single Page (单页模板，无侧边栏/上下篇/分类) ===== */
.single-page {
    padding: 3rem 0;
}

.single-page-container {
    max-width: 960px;
    margin: 0 auto;
}

.single-page-header {
    margin-bottom: 2.5rem;
    text-align: center;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--color-border-light);
}

.single-page-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 0.875rem;
}

.single-page-meta {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.single-page-updated::before {
    content: "·";
    margin-right: 0.5rem;
}

.single-page-content {
    font-size: 1.0625rem;
}

.single-page-share {
    margin-top: 3rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ===== Article Post Detail (文章模板，双栏 + 侧边栏 + 上下篇) ===== */
.article-post-detail {
    padding: 3rem 0;
}

.article-detail-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 3rem;
    align-items: start;
}

.article-main {
    min-width: 0;
}

/* 文章详情页中 .article-container 取消居中限宽，交由网格列控制 */
.article-post-detail .article-container {
    max-width: none;
    margin: 0;
}

.article-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.sidebar-widget-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-primary-light);
}

.sidebar-post-list {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.sidebar-post-item {
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--color-border-light);
}

.sidebar-post-item:last-child {
    border-bottom: none;
}

.sidebar-post-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    text-decoration: none;
}

.sidebar-post-title {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition);
}

.sidebar-post-link:hover .sidebar-post-title {
    color: var(--color-primary);
}

.sidebar-post-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ===== Post Navigation (上下篇导航) ===== */
.post-nav {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.post-nav-item {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    padding: 1rem 1.25rem;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition);
    min-height: 64px;
    justify-content: center;
}

a.post-nav-item:hover {
    background: var(--color-primary-light);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.post-nav-next {
    text-align: right;
}

.post-nav-placeholder {
    visibility: hidden;
}

.post-nav-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.post-nav-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

a.post-nav-item:hover .post-nav-title {
    color: var(--color-primary);
}

/* ===== Article Detail Responsive ===== */
@media (max-width: 1024px) {
    .article-detail-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .article-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-widget {
        flex: 1 1 280px;
    }
}

@media (max-width: 768px) {
    .single-page-title {
        font-size: 1.875rem;
    }

    .single-page-content {
        font-size: 1rem;
    }

    .post-nav {
        grid-template-columns: 1fr;
    }

    .post-nav-next {
        text-align: left;
    }

    .article-sidebar {
        flex-direction: column;
    }
}

/* ===== Article List Page (文章列表卡片) ===== */
.article-list-page {
    padding: 3rem 0;
}

.article-list-header {
    margin-bottom: 2.5rem;
}

.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.75rem;
}

.article-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

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

.article-card-cover {
    display: block;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.article-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.article-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.article-cover-placeholder svg {
    width: 48px;
    height: 48px;
}

.article-card-body {
    padding: 1.25rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-bottom: 0.625rem;
    flex-wrap: wrap;
}

.article-card-cat {
    display: inline-block;
    padding: 0.125rem 0.625rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.article-card-date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.article-card-title {
    font-size: 1.1875rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.625rem;
}

.article-card-title a {
    color: var(--color-text);
    transition: color var(--transition);
}

.article-card-title a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.article-card-excerpt {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-more {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: auto;
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition);
}

.article-card-more svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition);
}

.article-card-more:hover {
    color: var(--color-primary-dark);
    text-decoration: none;
}

.article-card-more:hover svg {
    transform: translateX(3px);
}

/* ===== Pagination Nav (列表分页) ===== */
.pagination-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 3rem;
    padding-top: 2rem;
    flex-wrap: wrap;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    transition: all var(--transition);
}

a.pagination-link:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    text-decoration: none;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
}

/* ===== Btn Outline ===== */
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

/* ===== Products List Page (产品列表 + 侧边栏分类) ===== */
.products-list-page {
    padding: 3rem 0;
}

.products-list-header {
    margin-bottom: 2.5rem;
}

.products-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
}

.products-sidebar {
    position: sticky;
    top: calc(var(--header-height) + 1.5rem);
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-primary);
}

.sidebar-cat-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-cat-item a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    color: var(--color-text-light);
    transition: all var(--transition);
}

.sidebar-cat-item a:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
    text-decoration: none;
}

.sidebar-cat-item.active > a {
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 600;
}

.cat-count {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    padding: 0.0625rem 0.5rem;
    border-radius: var(--radius-full);
}

.sidebar-cat-item.active > a .cat-count {
    background: var(--color-primary);
    color: #fff;
}

/* 顶级分类（1 级）：加粗、深色，与子分类明确区分 */
.sidebar-cat-lv1 > a {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    border-radius: var(--radius-sm);
}

/* 子分类（2 级）：缩进 + 更小字号 + 更浅颜色 */
.sidebar-cat-sub {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    margin: 0.125rem 0 0.375rem;
    padding-left: 0.5rem;
    margin-left: 0.75rem;
    border-left: 2px solid var(--color-border-light);
}

.sidebar-cat-lv2 > a {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-muted);
    padding: 0.375rem 0.75rem;
}

.products-main {
    min-width: 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
}

.product-item-card {
    background: #fff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.product-item-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.product-item-cover {
    display: block;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.product-item-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-item-card:hover .product-item-cover img {
    transform: scale(1.05);
}

.product-item-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.product-item-placeholder svg {
    width: 48px;
    height: 48px;
}

.product-item-body {
    padding: 1rem 1.25rem 1.25rem;
}

.product-item-cats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 0.5rem;
}

.product-item-cat {
    display: inline-block;
    padding: 0.0625rem 0.5rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
}

.product-item-title {
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.4;
}

.product-item-title a {
    color: var(--color-text);
    transition: color var(--transition);
}

.product-item-title a:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.product-item-desc {
    margin-top: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.875rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Products List Responsive ===== */
@media (max-width: 1024px) {
    .products-layout {
        grid-template-columns: 1fr;
    }

    .products-sidebar {
        position: static;
    }

    .sidebar-cat-list {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-cat-item {
        flex: 0 0 auto;
    }
}

@media (max-width: 768px) {
    .article-list {
        grid-template-columns: 1fr;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .pagination-nav {
        flex-direction: column;
        gap: 0.5rem;
    }
}