```css
/* ===== 黑料吃瓜社区 - 完整样式表 ===== */
/* 核心颜色规范 — 高可读性，深色文字 + 浅色背景 */
:root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-footer: #1F2937;
    --text-primary: #1F2937;
    --text-secondary: #334155;
    --text-heading: #111827;
    --text-footer: #E2E8F0;
    --text-footer-heading: #F8FAFC;
    --border-color: #D1D5DB;
    --accent: #B45309;
    --accent-dark: #92400E;
    --btn-text: #FFFFFF;
    --shadow: 0 4px 12px rgba(0,0,0,0.06);
    --nav-bg: rgba(255,255,255,0.95);
    --gradient-banner: linear-gradient(135deg, #FDE68A 0%, #F59E0B 50%, #D97706 100%);
    --card-hover-shadow: 0 8px 24px rgba(0,0,0,0.12);
    --transition-speed: 0.3s;
}

/* 暗黑模式变量 */
[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-card: #1F2937;
    --bg-footer: #0B1120;
    --text-primary: #E2E8F0;
    --text-secondary: #CBD5E1;
    --text-heading: #F8FAFC;
    --text-footer: #E2E8F0;
    --text-footer-heading: #FFFFFF;
    --border-color: #374151;
    --accent: #F59E0B;
    --accent-dark: #D97706;
    --btn-text: #111827;
    --nav-bg: rgba(17,24,39,0.95);
    --gradient-banner: linear-gradient(135deg, #1F2937 0%, #374151 50%, #4B5563 100%);
    --card-hover-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    overflow-x: hidden;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-dark);
}

/* 排版 */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

h1 {
    font-size: 2.6rem;
    letter-spacing: -0.02em;
    background: var(--gradient-banner);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2rem;
    margin-top: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--accent);
}

h3 {
    font-size: 1.4rem;
    margin-top: 1.5rem;
}

h4 {
    font-size: 1.1rem;
    margin-top: 1rem;
}

p {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1rem;
}

a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed) ease;
    position: relative;
}

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

a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-speed) ease;
}

a:hover::after {
    width: 100%;
}

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

/* ===== 导航栏 ===== */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-heading);
    background: var(--gradient-banner);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo a::after {
    display: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-speed) ease;
}

.nav-links a:hover::before {
    width: 100%;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-radius: 30px;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(180, 83, 9, 0.1);
}

.search-box input {
    background: transparent;
    border: none;
    padding: 0.4rem 0.6rem;
    color: var(--text-primary);
    outline: none;
    font-size: 0.9rem;
    width: 140px;
    transition: width var(--transition-speed) ease;
}

.search-box input:focus {
    width: 180px;
}

.search-box input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: transform var(--transition-speed) ease;
}

.search-box button:hover {
    transform: scale(1.1);
}

/* 主题切换按钮 */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 30px;
    padding: 0.3rem 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    font-size: 0.9rem;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* 汉堡按钮 */
.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
    transition: transform var(--transition-speed) ease;
}

.hamburger:hover {
    transform: scale(1.1);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--bg-primary);
    padding: 1rem 2rem;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.mobile-menu.show {
    display: flex;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-menu a {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 500;
}

.mobile-menu a:last-child {
    border-bottom: none;
}

/* ===== Banner区域 ===== */
.banner {
    background: var(--gradient-banner);
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: rgba(255,255,255,0.1);
    transform: rotate(30deg);
    animation: bannerShine 8s infinite linear;
}

@keyframes bannerShine {
    0% {
        transform: rotate(30deg) translateX(-100%);
    }
    100% {
        transform: rotate(30deg) translateX(100%);
    }
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.banner-text h1 {
    font-size: 3rem;
    color: var(--text-heading);
    background: none;
    -webkit-text-fill-color: var(--text-heading);
}

.banner-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

.banner-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    padding: 1rem 1.5rem;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: all var(--transition-speed) ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.2);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    background: var(--gradient-banner);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Banner SVG 效果 */
.banner svg {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform var(--transition-speed) ease;
}

.banner svg:hover {
    transform: scale(1.02) rotate(1deg);
}

/* ===== 卡片通用 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: var(--shadow);
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-banner);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-hover-shadow);
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== 文章列表 ===== */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.article-item {
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.article-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: var(--gradient-banner);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition-speed) ease;
}

.article-item:hover {
    transform: translateX(8px);
    box-shadow: var(--card-hover-shadow);
}

.article-item:hover::before {
    transform: scaleY(1);
}

.article-item h4 {
    margin-bottom: 0.3rem;
    font-size: 1.1rem;
    transition: color var(--transition-speed) ease;
}

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

.article-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.article-item p {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* ===== FAQ ===== */
.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 0;
    transition: all var(--transition-speed) ease;
}

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

.faq-question {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-heading);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition-speed) ease;
    padding: 0.5rem 0;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question span {
    font-size: 1.5rem;
    transition: transform var(--transition-speed) ease;
    color: var(--accent);
}

.faq-item.open .faq-question span {
    transform: rotate(45deg);
}

.faq-answer {
    margin-top: 0.8rem;
    color: var(--text-primary);
    display: none;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.faq-item.open .faq-answer {
    display: block;
}

/* ===== HowTo ===== */
.howto-steps {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.howto-steps::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-banner);
}

.howto-steps ol {
    padding-left: 1.5rem;
    color: var(--text-primary);
}

.howto-steps li {
    margin-bottom: 0.8rem;
    padding: 0.5rem 0;
    transition: all var(--transition-speed) ease;
    border-radius: 8px;
    padding-left: 1rem;
}

.howto-steps li:hover {
    background: var(--bg-card);
    padding-left: 1.5rem;
}

.howto-steps h4 {
    color: var(--text-heading);
    margin-top: 1rem;
}

.howto-steps p {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
}

/* ===== 表格 ===== */
.table-wrap {
    overflow-x: auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    min-width: 600px;
}

th, td {
    padding: 1rem;
    border: 1px solid var(--border-color);
    text-align: left;
    color: var(--text-primary);
    transition: background var(--transition-speed) ease;
}

th {
    background: var(--bg-secondary);
    font-weight: 700;
    color: var(--text-heading);
    position: sticky;
    top: 0;
}

tr:hover td {
    background: var(--bg-secondary);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-footer);
    color: var(--text-footer);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-banner);
}

.footer h4 {
    color: var(--text-footer-heading);
    font-size: 1.2rem;
}

.footer a {
    color: var(--text-footer);
    transition: color var(--transition-speed) ease;
}

.footer a:hover {
    color: #FFFFFF;
}

.footer a::after {
    background: #FFFFFF;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-bottom {
    border-top: 1px solid #374151;
    margin-top: 2rem;
    padding-top: 1.5rem;
    color: #9CA3AF;
    font-size: 0.9rem;
    text-align: center;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    background: var(--gradient-banner);
    color: var(--btn-text);
    padding: 0.6rem 1.5rem;
    border-radius: 30px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.2);
    transition: left var(--transition-speed) ease;
    z-index: -1;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.btn:hover::before {
    left: 0;
}

.btn:active {
    transform: translateY(-1px);
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--gradient-banner);
    color: var(--btn-text);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transition: all var(--transition-speed) ease;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* ===== 友情链接区域 ===== */
section p a {
    margin: 0 0.3rem;
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    transition: all var(--transition-speed) ease;
}

section p a:hover {
    background: var(--accent);
    color: var(--btn-text);
    border-color: var(--accent);
    transform: translateY(-2px);
}

section p a::after {
    display: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .banner-text h1 {
        font-size: 2.4rem;
    }
    
    .banner-content {
        gap: 2rem;
    }
    
    .stat-item {
        padding: 0.8rem 1rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: block;
    }
    
    .mobile-menu.show {
        display: flex;
    }
    
    .banner-content {
        flex-direction: column;
        text-align: center;
    }
    
    .banner-text h1 {
        font-size: 2rem;
    }
    
    .banner-text p {
        font-size: 1rem;
    }
    
    .banner-stats {
        justify-content: center;
        gap: 1.5rem;
    }
    
    .search-box {
        display: none;
    }
    
    .container {
        padding: 0 16px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        bottom: 1rem;
        right: 1rem;
    }
}

@media (max-width: 480px) {
    .banner {
        padding: 3rem 0;
    }
    
    .stat-item {
        flex: 1;
        min-width: 100px;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .banner-content svg {
        width: 100%;
        height: auto;
    }
    
    .article-item {
        padding: 1rem;
    }
    
    .howto-steps {
        padding: 1.5rem;
    }
    
    .table-wrap {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.75rem;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .back-to-top,
    .theme-toggle,
    .hamburger,
    .search-box {
        display: none !important;
    }
    
    .banner {
        background: none;
        padding: 2rem 0;
    }
    
    .card,
    .article-item {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
}

/* ===== 动画增强 ===== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.stat-item:nth-child(2) .stat-number {
    animation: pulse 2s infinite;
}

/* 卡片悬浮光效 */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
}

.card:hover::after {
    left: 100%;
}

/* 文字渐变效果 */
.gradient-text {
    background: var(--gradient-banner);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 焦点可见性 */
:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 暗色模式下的特殊调整 */
[data-theme="dark"] .card {
    background: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .card::after {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
}

[data-theme="dark"] .stat-item {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.1);
}

[data-theme="dark"] .banner-text h1 {
    color: #F8FAFC;
    -webkit-text-fill-color: #F8FAFC;
}

[data-theme="dark"] .search-box input {
    color: #E2E8F0;
}

[data-theme="dark"] .search-box input::placeholder {
    color: #9CA3AF;
}

/* 加载动画 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 卡片进入动画 */
.card,
.article-item {
    animation: cardEnter 0.5s ease both;
}

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

.card:nth-child(2),
.article-item:nth-child(2) {
    animation-delay: 0.1s;
}

.card:nth-child(3),
.article-item:nth-child(3) {
    animation-delay: 0.2s;
}

.card:nth-child(4),
.article-item:nth-child(4) {
    animation-delay: 0.3s;
}

/* 文章编号样式 */
.article-item:nth-child(odd) {
    border-left: 3px solid var(--accent);
}

.article-item:nth-child(even) {
    border-right: 3px solid var(--accent);
}
```