```css
/* ===== www91 - 91社区 完整样式表 ===== */
/* 主题风格：深空渐变 + 玻璃拟态 + 微光交互 */
/* 设计理念：影视动漫的叙事感 + 现代社区的清爽感 */

/* ---------- 全局变量（亮/暗自适应） ---------- */
:root {
    --bg: #F8FAFF;
    --bg-soft: #EEF2F8;
    --bg-glass: rgba(255, 255, 255, 0.65);
    --bg-glass-strong: rgba(255, 255, 255, 0.85);
    --text-primary: #1E2A3A;
    --text-secondary: #3E4E62;
    --text-heading: #0F1928;
    --text-link: #1D4ED8;
    --text-link-hover: #1E3A8A;
    --text-footer: #CBD5E1;
    --card-bg: rgba(255, 255, 255, 0.7);
    --border-light: rgba(30, 58, 95, 0.12);
    --border-glass: rgba(255, 255, 255, 0.5);
    --dark-bg: #0B1220;
    --dark-card: rgba(30, 41, 59, 0.8);
    --dark-text: #E2E8F0;
    --dark-heading: #F8FAFC;
    --dark-link: #93C5FD;
    --dark-link-hover: #BFDBFE;
    --btn-bg: linear-gradient(135deg, #1E3A5F, #1D4ED8);
    --btn-text: #FFFFFF;
    --btn-hover: linear-gradient(135deg, #1D4ED8, #2563EB);
    --hero-gradient: linear-gradient(120deg, #0F172A 0%, #1E3A5F 45%, #1D4ED8 100%);
    --accent-glow: rgba(29, 78, 216, 0.15);
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.1);
    --shadow-glow: 0 0 0 1px rgba(255,255,255,0.2) inset, 0 8px 32px rgba(29, 78, 216, 0.12);
}

/* 暗黑模式 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0B1220;
        --bg-soft: #111C2E;
        --bg-glass: rgba(15, 23, 42, 0.7);
        --bg-glass-strong: rgba(15, 23, 42, 0.9);
        --text-primary: #E2E8F0;
        --text-secondary: #94A3B8;
        --text-heading: #F8FAFC;
        --text-link: #93C5FD;
        --text-link-hover: #BFDBFE;
        --text-footer: #94A3B8;
        --card-bg: rgba(30, 41, 59, 0.6);
        --border-light: rgba(148, 163, 184, 0.15);
        --border-glass: rgba(255, 255, 255, 0.08);
        --btn-bg: linear-gradient(135deg, #1D4ED8, #3B82F6);
        --btn-hover: linear-gradient(135deg, #3B82F6, #60A5FA);
        --hero-gradient: linear-gradient(120deg, #020617 0%, #0F172A 40%, #1E3A5F 100%);
        --accent-glow: rgba(59, 130, 246, 0.15);
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
        --shadow-glow: 0 0 0 1px rgba(255,255,255,0.06) inset, 0 8px 32px rgba(59, 130, 246, 0.08);
    }
}

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

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

body {
    background-color: var(--bg);
    background-image: 
        radial-gradient(ellipse at 20% 20%, var(--accent-glow) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 0%, var(--accent-glow) 0%, transparent 40%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-soft);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #1D4ED8, #1E3A5F);
    border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover {
    background: #1E3A8A;
}

::selection {
    background: rgba(29, 78, 216, 0.2);
    color: var(--text-heading);
}

/* ---------- 标题与段落 ---------- */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    font-weight: 800;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin: 2.5rem 0 1.5rem;
    padding-left: 1.2rem;
    border-left: 4px solid transparent;
    border-image: linear-gradient(180deg, #1D4ED8, #60A5FA) 1;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #1D4ED8, transparent);
    border-radius: 4px;
    opacity: 0.4;
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin: 1.5rem 0 0.75rem;
}

h4 {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    margin: 1.2rem 0 0.6rem;
}

p {
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

a {
    color: var(--text-link);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* ---------- 布局容器 ---------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* ---------- 导航栏（毛玻璃效果） ---------- */
nav {
    background: var(--bg-glass);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-glass);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 0;
    min-height: 64px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-heading), var(--text-link));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo span {
    -webkit-text-fill-color: var(--text-link);
    background: none;
}

.menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.menu a {
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
    padding: 0.3rem 0;
}

.menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #1D4ED8, #60A5FA);
    transition: width 0.3s ease;
}

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

.menu a:hover {
    color: var(--text-link);
    text-decoration: none;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.2rem;
    transition: transform 0.2s ease;
}

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

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    background: var(--btn-bg);
    color: var(--btn-text);
    padding: 0.7rem 1.6rem;
    border-radius: 50px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.3s ease, background 0.3s ease;
    box-shadow: 0 4px 16px rgba(29, 78, 216, 0.2);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    background: var(--btn-hover);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(29, 78, 216, 0.3);
}

.btn:hover::before {
    left: 100%;
}

/* ---------- Hero 区域 ---------- */
.hero {
    background: var(--hero-gradient);
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
    color: white;
    padding: 4rem 0;
    border-radius: 0 0 32px 32px;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: white;
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease;
}

.hero p {
    color: #E2E8F0;
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    max-width: 700px;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero .btn {
    background-color: #FFFFFF;
    color: #1E3A5F;
    border: none;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero .btn:hover {
    background-color: #E2E8F0;
    color: #1E3A5F;
    transform: translateY(-2px);
}

/* ---------- 卡片网格 ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

/* 毛玻璃卡片 */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(8px) saturate(140%);
    -webkit-backdrop-filter: blur(8px) saturate(140%);
    border-radius: 20px;
    padding: 1.8rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-glass);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #1D4ED8, transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-glass-strong);
}

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

.card h3 {
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card p {
    color: var(--text-primary);
    margin-bottom: 0;
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-grid .card {
    animation: fadeInUp 0.6s ease both;
}

.card-grid .card:nth-child(2) { animation-delay: 0.1s; }
.card-grid .card:nth-child(3) { animation-delay: 0.2s; }
.card-grid .card:nth-child(4) { animation-delay: 0.3s; }

/* ---------- 表格 ---------- */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 2rem 0;
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-glass);
}

th {
    background: linear-gradient(135deg, var(--bg-soft), var(--bg));
    color: var(--text-heading);
    font-weight: 700;
    padding: 14px 16px;
    text-align: left;
    border-bottom: 2px solid var(--border-light);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    transition: background 0.2s ease;
}

tbody tr:last-child td {
    border-bottom: none;
}

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

/* ---------- FAQ ---------- */
.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 0.3rem 0;
}

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

.faq-question {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-heading);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0.5rem;
    transition: color 0.2s ease, padding-left 0.2s ease;
    position: relative;
}

.faq-question:hover {
    color: var(--text-link);
    padding-left: 0.8rem;
}

.faq-question span {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-link);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

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

.faq-answer {
    margin-top: 0;
    padding: 0 0.5rem 1.2rem;
    color: var(--text-primary);
    line-height: 1.8;
    display: none;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Footer ---------- */
footer {
    background: #0F172A;
    background-image: radial-gradient(ellipse at 50% 0%, rgba(29, 78, 216, 0.15) 0%, transparent 60%);
    color: var(--text-footer);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
    position: relative;
}

footer a {
    color: #93C5FD;
    transition: color 0.2s ease;
}

footer a:hover {
    color: #BFDBFE;
}

footer h4 {
    color: #F8FAFC;
    margin-bottom: 1rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-cols {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-cols div {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.copyright {
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    margin-top: 2rem;
    padding-top: 1.5rem;
    text-align: center;
    color: #94A3B8;
    font-size: 0.9rem;
}

/* ---------- 辅助类 ---------- */
.meta-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: -1rem;
}

.badge {
    background: var(--bg-soft);
    color: var(--text-primary);
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--border-light);
    display: inline-block;
}

.article-list {
    list-style: none;
    padding: 0;
}

.article-list li {
    margin-bottom: 1.2rem;
    padding: 0.8rem 1rem;
    border-radius: 12px;
    transition: background 0.2s ease, padding-left 0.2s ease;
    border-left: 3px solid transparent;
}

.article-list li:hover {
    background: var(--bg-soft);
    padding-left: 1.5rem;
    border-left-color: var(--text-link);
}

.article-list a {
    font-weight: 600;
    font-size: 1.05rem;
}

.article-list .date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: 0.5rem;
    white-space: nowrap;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
    align-items: center;
}

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

/* 文本工具 */
.text-muted {
    color: var(--text-secondary) !important;
}

.dark-section {
    background-color: #0F172A;
    color: var(--dark-text);
    padding: 3rem 0;
}

.dark-section h2,
.dark-section h3,
.dark-section h4 {
    color: var(--dark-heading);
}

.icon-text {
    color: var(--text-heading);
}

/* 列表样式优化 */
ol, ul {
    padding-left: 1.5rem;
    color: var(--text-primary);
}

li {
    margin-bottom: 0.5rem;
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .nav-inner {
        flex-wrap: wrap;
        padding: 0.6rem 0;
    }

    .menu {
        display: none;
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
        background: var(--bg-glass-strong);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 1rem;
        border-radius: 16px;
        box-shadow: var(--shadow-md);
        margin-top: 0.5rem;
        border: 1px solid var(--border-glass);
    }

    .menu.active {
        display: flex;
        animation: fadeIn 0.3s ease;
    }

    .menu a {
        padding: 0.6rem 0.5rem;
        border-radius: 8px;
    }

    .menu a:hover {
        background: var(--bg-soft);
    }

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

    .hamburger {
        display: block;
    }

    .hero {
        padding: 2.5rem 0;
        border-radius: 0 0 24px 24px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
        margin: 1.8rem 0 1rem;
    }

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

    .card {
        padding: 1.4rem;
    }

    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .article-list .date {
        display: block;
        margin-left: 0;
        margin-top: 0.3rem;
    }

    .footer-cols {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* 小屏幕设备 */
@media (max-width: 480px) {
    .logo {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.95rem;
    }

    .hero p {
        font-size: 1rem;
    }
}

/* 滚动动画支持 - 使用 Intersection Observer 不可行时用媒体查询 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
```