:root {
--color-primary: #4f46e5;
--color-primary-dark: #3730a3;
--color-primary-light: #eef2ff;
--color-primary-hover: #4338ca;
--color-accent: #06b6d4;
--color-accent-light: #ecfeff;
--color-bg: #f8fafc;
--color-surface: #ffffff;
--color-surface-alt: #f1f5f9;
--color-surface-translucent: rgba(255, 255, 255, 0.85);
--color-border: #e2e8f0;
--color-border-hover: #cbd5e1;
--color-text: #0f172a;
--color-text-secondary: #475569;
--color-text-muted: #94a3b8;
--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
--container-max: 1200px;
--header-height: 60px;
--font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
--font-mono: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
--transition-fast: 150ms ease;
--transition-base: 200ms ease;
}
@media (prefers-color-scheme: dark) {
:root {
--color-primary: #818cf8;
--color-primary-dark: #6366f1;
--color-primary-light: rgba(99, 102, 241, 0.15);
--color-primary-hover: #a5b4fc;
--color-accent: #22d3ee;
--color-accent-light: rgba(34, 211, 238, 0.1);
--color-bg: #0f172a;
--color-surface: #1e293b;
--color-surface-alt: #162033;
--color-surface-translucent: rgba(30, 41, 59, 0.9);
--color-border: #334155;
--color-border-hover: #475569;
--color-text: #f1f5f9;
--color-text-secondary: #94a3b8;
--color-text-muted: #64748b;
--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
font-size: 16px;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
scroll-behavior: smooth;
}
body {
font-family: var(--font-sans);
background: var(--color-bg);
color: var(--color-text);
line-height: 1.6;
min-height: 100vh;
display: flex;
flex-direction: column;
}
img { max-width: 100%; height: auto; display: block; }
a {
color: var(--color-primary);
text-decoration: none;
transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-hover); }
.container {
width: 100%;
max-width: var(--container-max);
margin: 0 auto;
padding: 0 1.5rem;
}
.main-content { flex: 1; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--color-text); }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
p { line-height: 1.7; }
.btn {
display: inline-flex;
align-items: center;
justify-content: center;
padding: 0.625rem 1.5rem;
font-size: 0.9375rem;
font-weight: 600;
font-family: var(--font-sans);
border-radius: 0.5rem;
border: 1px solid transparent;
cursor: pointer;
transition: all var(--transition-base);
text-decoration: none;
gap: 0.5rem;
line-height: 1.4;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover:not(:disabled) { background: var(--color-primary); color: #fff; }
.site-header {
position: sticky;
top: 0;
z-index: 50;
border-bottom: 1px solid var(--color-border);
backdrop-filter: blur(12px);
background: var(--color-surface-translucent);
}
.header-inner {
display: flex;
align-items: center;
justify-content: space-between;
height: 60px;
}
.header-brand {
display: flex;
align-items: center;
gap: 0.625rem;
text-decoration: none;
color: var(--color-primary);
}
.brand-icon { flex-shrink: 0; }
.brand-text {
font-size: 1.25rem;
font-weight: 800;
letter-spacing: -0.02em;
color: var(--color-text);
}
.header-nav {
display: flex;
align-items: center;
gap: 0.25rem;
}
.nav-link {
padding: 0.5rem 1rem;
color: var(--color-text-secondary);
text-decoration: none;
font-size: 0.9375rem;
font-weight: 500;
border-radius: 0.5rem;
transition: all 0.2s;
background: none;
border: none;
cursor: pointer;
display: flex;
align-items: center;
gap: 0.35rem;
}
.nav-link:hover, .nav-link.active { color: var(--color-primary); background: var(--color-primary-light); }
.nav-dropdown { position: relative; }
.dropdown-menu {
position: absolute;
top: calc(100% + 0.5rem);
right: 0;
background: var(--color-surface);
border: 1px solid var(--color-border);
border-radius: 0.75rem;
padding: 0.5rem;
min-width: 200px;
box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
display: none;
}
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-item {
display: block;
padding: 0.625rem 1rem;
color: var(--color-text-secondary);
text-decoration: none;
font-size: 0.9375rem;
border-radius: 0.5rem;
transition: all 0.15s;
}
.dropdown-item:hover { background: var(--color-primary-light); color: var(--color-primary); }
.dropdown-arrow { transition: transform 0.2s; }
.nav-dropdown:hover .dropdown-arrow { transform: rotate(180deg); }
.mobile-toggle { display: none; }
@media (max-width: 768px) {
.header-nav { display: none; }
.mobile-toggle {
display: block;
background: none;
border: none;
color: var(--color-text);
cursor: pointer;
padding: 0.5rem;
border-radius: 0.5rem;
}
}
.site-footer {
background: var(--color-surface-alt);
border-top: 1px solid var(--color-border);
padding: 3rem 0 1.5rem;
margin-top: auto;
}
.footer-grid {
display: grid;
grid-template-columns: 2fr 1fr 1fr 1fr;
gap: 2rem;
margin-bottom: 2.5rem;
}
.footer-brand {
display: inline-block;
font-size: 1.25rem;
font-weight: 800;
color: var(--color-text);
text-decoration: none;
margin-bottom: 0.75rem;
}
.footer-description {
font-size: 0.875rem;
color: var(--color-text-secondary);
line-height: 1.7;
max-width: 360px;
}
.footer-heading {
font-size: 0.875rem;
font-weight: 700;
color: var(--color-text);
margin-bottom: 1rem;
letter-spacing: 0.02em;
}
.footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-links a {
font-size: 0.875rem;
color: var(--color-text-secondary);
text-decoration: none;
transition: color 0.15s;
}
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom {
border-top: 1px solid var(--color-border);
padding-top: 1.5rem;
text-align: center;
}
.copyright { font-size: 0.8125rem; color: var(--color-text-muted); }
@media (max-width: 768px) {
.footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem 1.5rem; }
.footer-brand-section { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
.footer-grid { grid-template-columns: 1fr; }
}
.hero {
background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
color: #fff;
padding: 4rem 0 3rem;
text-align: center;
}
.hero-title {
font-size: 2.5rem;
font-weight: 800;
margin-bottom: 1rem;
letter-spacing: -0.02em;
color: #fff;
}
.hero-description {
font-size: 1.125rem;
opacity: 0.9;
max-width: 600px;
margin: 0 auto;
line-height: 1.7;
}
.category-filter {
padding: 1.5rem 0;
background: var(--color-surface);
border-bottom: 1px solid var(--color-border);
position: sticky;
top: 60px;
z-index: 40;
}
.filter-tabs {
display: flex;
gap: 0.5rem;
overflow-x: auto;
padding-bottom: 0.25rem;
-webkit-overflow-scrolling: touch;
}
.filter-tab {
padding: 0.5rem 1.25rem;
border: 1px solid var(--color-border);
border-radius: 2rem;
background: transparent;
color: var(--color-text-secondary);
font-size: 0.875rem;
cursor: pointer;
white-space: nowrap;
transition: all 0.2s ease;
text-decoration: none;
}
.filter-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-tab.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.article-list-section { padding: 2rem 0 4rem; }
.article-grid {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
gap: 1.5rem;
}
.article-card {
display: flex;
flex-direction: column;
background: var(--color-surface);
border: 1px solid var(--color-border);
border-radius: 0.75rem;
overflow: hidden;
text-decoration: none;
color: inherit;
transition: all 0.25s ease;
}
.article-card:hover {
border-color: var(--color-primary);
box-shadow: 0 4px 20px rgba(79, 70, 229, 0.1);
transform: translateY(-2px);
}
.card-image {
position: relative;
width: 100%;
aspect-ratio: 16 / 9;
overflow: hidden;
background: var(--color-surface-alt);
}
.card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s ease; }
.article-card:hover .card-image img { transform: scale(1.03); }
.card-image-placeholder {
width: 100%;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
color: var(--color-text-muted);
background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-border) 100%);
min-height: 180px;
}
.card-body { flex: 1; display: flex; flex-direction: column; padding: 1.25rem; }
.card-meta { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.card-category {
display: inline-block;
padding: 0.15rem 0.5rem;
background: var(--color-primary-light);
color: var(--color-primary);
border-radius: 0.25rem;
font-size: 0.75rem;
font-weight: 600;
letter-spacing: 0.02em;
}
.card-date { font-size: 0.8125rem; color: var(--color-text-muted); }
.card-title {
font-size: 1.0625rem;
font-weight: 700;
line-height: 1.45;
color: var(--color-text);
margin-bottom: 0.5rem;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
}
.card-summary {
font-size: 0.875rem;
color: var(--color-text-secondary);
line-height: 1.6;
margin-bottom: 1rem;
flex: 1;
display: -webkit-box;
-webkit-line-clamp: 3;
-webkit-box-orient: vertical;
overflow: hidden;
}
.card-footer {
display: flex;
justify-content: space-between;
align-items: center;
padding-top: 0.75rem;
border-top: 1px solid var(--color-border);
}
.card-source { font-size: 0.8125rem; color: var(--color-text-muted); }
.card-read-more { font-size: 0.8125rem; color: var(--color-primary); font-weight: 500; }
.article-page { padding: 2rem 0 4rem; }
.breadcrumb {
font-size: 0.875rem;
color: var(--color-text-muted);
margin-bottom: 2rem;
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 0.4rem;
}
.breadcrumb a { color: var(--color-primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .separator { color: var(--color-border); }
.breadcrumb .current {
color: var(--color-text-secondary);
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
max-width: 300px;
}
.article-header { margin-bottom: 2rem; }
.article-meta-top {
display: flex;
align-items: center;
gap: 1rem;
margin-bottom: 1rem;
flex-wrap: wrap;
}
.category-badge {
display: inline-block;
padding: 0.25rem 0.75rem;
background: var(--color-primary-light);
color: var(--color-primary);
border-radius: 2rem;
font-size: 0.8125rem;
font-weight: 600;
text-decoration: none;
transition: background 0.2s;
}
.category-badge:hover { background: var(--color-primary); color: #fff; }
.publish-date { font-size: 0.875rem; color: var(--color-text-muted); }
.source-tag {
font-size: 0.8125rem;
color: var(--color-text-muted);
background: var(--color-surface-alt);
padding: 0.2rem 0.6rem;
border-radius: 0.25rem;
}
.article-title {
font-size: 2rem;
font-weight: 800;
line-height: 1.3;
color: var(--color-text);
margin-bottom: 1rem;
letter-spacing: -0.01em;
}
.article-summary {
font-size: 1.125rem;
color: var(--color-text-secondary);
line-height: 1.7;
border-left: 3px solid var(--color-primary);
padding-left: 1rem;
}
.article-cover { margin-bottom: 2rem; border-radius: 0.75rem; overflow: hidden; aspect-ratio: 16 / 9; background: var(--color-surface-alt); }
.article-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.article-content {
font-size: 1.0625rem;
line-height: 1.8;
color: var(--color-text);
max-width: 780px;
}
.article-content h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2.5rem; margin-bottom: 1rem; }
.article-content h3 { font-size: 1.25rem; font-weight: 600; margin-top: 2rem; margin-bottom: 0.75rem; }
.article-content p { margin-bottom: 1.25rem; }
.article-content img { max-width: 100%; height: auto; border-radius: 0.5rem; margin: 1.5rem 0; }
.article-content a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content blockquote {
border-left: 3px solid var(--color-primary);
padding-left: 1rem;
margin: 1.5rem 0;
color: var(--color-text-secondary);
font-style: italic;
}
.article-content pre {
background: var(--color-surface-alt);
padding: 1rem 1.25rem;
border-radius: 0.5rem;
overflow-x: auto;
margin: 1.5rem 0;
font-family: var(--font-mono);
font-size: 0.875rem;
line-height: 1.6;
}
.article-content code { font-family: var(--font-mono); font-size: 0.875em; }
.article-content ul, .article-content ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.article-content li { margin-bottom: 0.5rem; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.article-content th, .article-content td { padding: 0.75rem 1rem; border: 1px solid var(--color-border); text-align: left; }
.article-content th { background: var(--color-surface-alt); font-weight: 600; }
.faq-section { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.faq-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.faq-item { border: 1px solid var(--color-border); border-radius: 0.5rem; margin-bottom: 0.75rem; overflow: hidden; }
.faq-question {
padding: 1rem 1.25rem;
cursor: pointer;
font-weight: 600;
color: var(--color-text);
background: var(--color-surface-alt);
list-style: none;
display: flex;
align-items: center;
justify-content: space-between;
}
.faq-question::after { content: '+'; font-size: 1.25rem; color: var(--color-primary); flex-shrink: 0; margin-left: 1rem; }
details[open] .faq-question::after { content: '-'; }
.faq-question::-webkit-details-marker { display: none; }
.faq-answer { padding: 1rem 1.25rem; color: var(--color-text-secondary); line-height: 1.7; }
.article-footer {
margin-top: 2.5rem;
padding-top: 1.5rem;
border-top: 1px solid var(--color-border);
display: flex;
justify-content: space-between;
align-items: center;
flex-wrap: wrap;
gap: 1rem;
}
.article-tags { display: flex; align-items: center; gap: 0.5rem; }
.tag-label { font-size: 0.875rem; color: var(--color-text-muted); }
.tag {
display: inline-block;
padding: 0.2rem 0.6rem;
background: var(--color-surface-alt);
color: var(--color-text-secondary);
border-radius: 0.25rem;
font-size: 0.8125rem;
text-decoration: none;
transition: all 0.2s;
}
.tag:hover { background: var(--color-primary-light); color: var(--color-primary); }
.original-link a { color: var(--color-primary); font-size: 0.9375rem; text-decoration: none; font-weight: 500; }
.original-link a:hover { text-decoration: underline; }
.topic-hero {
background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
color: #fff;
padding: 3rem 0 2.5rem;
}
.topic-hero .breadcrumb { opacity: 0.85; }
.topic-hero .breadcrumb a { color: #fff; opacity: 0.8; }
.topic-hero .breadcrumb a:hover { opacity: 1; }
.topic-hero .breadcrumb .separator { opacity: 0.5; }
.topic-title { font-size: 2rem; font-weight: 800; margin-bottom: 0.75rem; color: #fff; }
.topic-description { font-size: 1.0625rem; opacity: 0.9; max-width: 600px; line-height: 1.7; }
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--color-text-secondary); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }
::selection { background: var(--color-primary-light); color: var(--color-primary-dark); }
@media (max-width: 1024px) {
.container { padding: 0 1.25rem; }
}
@media (max-width: 768px) {
html { font-size: 15px; }
.container { padding: 0 1rem; }
.hero { padding: 3rem 0 2rem; }
.hero-title { font-size: 1.75rem; }
.hero-description { font-size: 1rem; }
.article-grid { grid-template-columns: 1fr; }
.article-title { font-size: 1.5rem; }
.article-content { font-size: 1rem; }
.topic-title { font-size: 1.5rem; }
}
@media (max-width: 480px) {
html { font-size: 14px; }
}
.related-articles {
margin-top: 3rem;
padding-top: 2rem;
border-top: 2px solid var(--color-border);
}
.related-articles h2 {
font-size: 1.25rem;
margin-bottom: 1rem;
color: var(--color-text);
}
.related-grid {
display: grid;
grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
gap: 1rem;
}
.related-card {
display: block;
padding: 1rem;
background: var(--color-surface-alt);
border-radius: 8px;
text-decoration: none;
transition: box-shadow 0.2s, transform 0.2s;
}
.related-card:hover {
box-shadow: 0 2px 8px rgba(0,0,0,0.1);
transform: translateY(-2px);
}
.related-card h3 {
font-size: 0.95rem;
color: var(--color-text);
margin: 0 0 0.5rem;
line-height: 1.4;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
}
.related-card p {
font-size: 0.85rem;
color: var(--color-text-secondary);
margin: 0 0 0.5rem;
display: -webkit-box;
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
}
.related-card time {
font-size: 0.75rem;
color: var(--color-text-muted);
}