```css
/* ============================================
   星空动漫 (doojkh.com) — 完整样式表
   风格：深空星云 / 赛博琉璃渐变
   作者：UI 设计系统
   ============================================ */

/* ---------- CSS 变量 & 主题系统 ---------- */
:root {
    /* 主色板 — 星云紫罗兰 */
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;

    /* 辅助色 — 星云粉 / 极光青 */
    --accent-pink: #EC4899;
    --accent-cyan: #06B6D4;
    --accent-gold: #F59E0B;

    /* 中性色板 */
    --bg: #F8FAFC;
    --card-bg: #FFFFFF;
    --card-glass: rgba(255, 255, 255, 0.65);
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --text-heading: #0F172A;
    --text-link: #4F46E5;
    --border-color: #E2E8F0;
    --border-light: rgba(255, 255, 255, 0.18);
    
    /* 按钮 */
    --btn-bg: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --btn-text: #FFFFFF;
    --btn-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
    
    /* 导航 */
    --nav-bg: rgba(255, 255, 255, 0.85);
    --nav-border: rgba(226, 232, 240, 0.8);
    
    /* 页脚 */
    --footer-bg: #0F172A;
    --footer-text: #94A3B8;
    --footer-heading: #F1F5F9;
    --footer-border: #1E293B;
    
    /* 标签 */
    --tag-bg: #EEF2FF;
    --tag-text: #4338CA;
    
    /* 暗色主题变量 */
    --dark-bg: #0B1120;
    --dark-card-bg: #1E293B;
    --dark-card-glass: rgba(30, 41, 59, 0.6);
    --dark-text-primary: #E2E8F0;
    --dark-text-secondary: #CBD5E1;
    --dark-text-tertiary: #94A3B8;
    --dark-text-heading: #F8FAFC;
    --dark-text-link: #A5B4FC;
    --dark-border: #334155;
    --dark-border-light: rgba(255, 255, 255, 0.08);
    --dark-btn-bg: linear-gradient(135deg, #6366F1 0%, #A855F7 100%);
    --dark-btn-text: #FFFFFF;
    --dark-btn-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.5);
    --dark-nav-bg: rgba(15, 23, 42, 0.85);
    --dark-nav-border: rgba(51, 65, 85, 0.6);
    --dark-footer-bg: #020617;
    --dark-footer-text: #64748B;
    --dark-footer-heading: #E2E8F0;
    --dark-footer-border: #1E293B;
    --dark-tag-bg: rgba(99, 102, 241, 0.15);
    --dark-tag-text: #C7D2FE;
}

/* 暗色模式覆盖 */
[data-theme="dark"] {
    --bg: var(--dark-bg);
    --card-bg: var(--dark-card-bg);
    --card-glass: var(--dark-card-glass);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-tertiary: var(--dark-text-tertiary);
    --text-heading: var(--dark-text-heading);
    --text-link: var(--dark-text-link);
    --border-color: var(--dark-border);
    --border-light: var(--dark-border-light);
    --btn-bg: var(--dark-btn-bg);
    --btn-text: var(--dark-btn-text);
    --btn-shadow: var(--dark-btn-shadow);
    --nav-bg: var(--dark-nav-bg);
    --nav-border: var(--dark-nav-border);
    --footer-bg: var(--dark-footer-bg);
    --footer-text: var(--dark-footer-text);
    --footer-heading: var(--dark-footer-heading);
    --footer-border: var(--dark-footer-border);
    --tag-bg: var(--dark-tag-bg);
    --tag-text: var(--dark-tag-text);
}

/* ---------- 全局重置 ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg);
    color: var(--text-primary);
    line-height: 1.75;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
    letter-spacing: 0.01em;
}

/* 背景星云装饰 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.35;
    color: var(--text-heading);
    letter-spacing: -0.02em;
}

p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

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

a:hover {
    color: var(--primary-400);
    text-decoration: none;
}

img, svg {
    max-width: 100%;
    display: block;
}

::selection {
    background: var(--primary-500);
    color: #fff;
}

/* ---------- 通用容器 ---------- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-400), var(--accent-pink));
    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-500), var(--accent-pink));
}

/* ---------- 导航栏 ---------- */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--nav-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 10px rgba(0, 0, 0, 0.03);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    max-width: 1280px;
    margin: 0 auto;
    gap: 16px;
}

/* Logo */
.logo {
    font-size: 1.7rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-600), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
    white-space: nowrap;
    user-select: none;
}

.logo span {
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航链接 */
.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease, color 0.3s ease;
    position: relative;
    font-size: 0.95rem;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink));
    border-radius: 2px;
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-heading);
    text-decoration: none;
}

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

/* 主题切换按钮 */
.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 8px 18px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.theme-toggle:hover {
    background: var(--tag-bg);
    border-color: var(--primary-300);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.8rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    border-radius: 8px;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: var(--tag-bg);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--nav-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.mobile-menu.open {
    max-height: 500px;
    display: flex;
}

.mobile-menu a {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
}

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

.mobile-menu .theme-toggle {
    align-self: flex-start;
    margin-top: 8px;
}

/* ---------- 首屏 Hero ---------- */
.hero {
    background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 40%, #4C1D95 100%);
    color: #fff;
    padding: 80px 24px;
    margin-bottom: 40px;
    border-radius: 0 0 48px 48px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: -20%;
    width: 70%;
    height: 140%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 60%);
    border-radius: 50%;
    animation: heroFloat 12s ease-in-out infinite alternate;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 60%);
    border-radius: 50%;
    animation: heroFloat 16s ease-in-out infinite alternate-reverse;
}

@keyframes heroFloat {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(-30px) scale(1.1); }
}

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

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    color: #FFFFFF;
    max-width: 800px;
    letter-spacing: -0.03em;
    line-height: 1.2;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.hero h1::after {
    content: ' ✦';
    color: var(--accent-gold);
}

.hero p {
    font-size: 1.35rem;
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 650px;
    line-height: 1.7;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #FFFFFF;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    border: 1px solid rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    text-decoration: none;
}

.hero .btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.4);
    border-color: rgba(255, 255, 255, 0.6);
}

.hero .btn::after {
    content: '→';
    font-size: 1.2rem;
    transition: transform 0.3s;
}

.hero .btn:hover::after {
    transform: translateX(6px);
}

/* ---------- 区块标题 ---------- */
.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-heading);
    margin: 60px 0 28px;
    padding-left: 20px;
    border-left: 6px solid transparent;
    border-image: linear-gradient(180deg, var(--primary-500), var(--accent-pink)) 1;
    position: relative;
    display: inline-block;
}

.section-title::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    bottom: 0;
    width: 6px;
    border-radius: 6px;
    background: linear-gradient(180deg, var(--primary-500), var(--accent-pink));
}

/* 子标题 */
.subtitle {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    margin: -20px 0 30px;
    padding-left: 20px;
}

/* ---------- 卡片网格 ---------- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
    margin-bottom: 30px;
}

/* 卡片基础样式 */
.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 28px;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink), var(--accent-cyan));
    opacity: 0;
    transition: opacity 0.4s;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 50px rgba(99, 102, 241, 0.15);
    border-color: var(--primary-300);
}

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

.card h3 {
    font-size: 1.5rem;
    color: var(--text-heading);
    margin-bottom: 14px;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: color 0.3s;
}

.card:hover h3 {
    color: var(--primary-600);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

.card .date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    display: block;
    margin: 18px 0 12px;
    font-weight: 400;
}

/* 标签 */
.tag {
    display: inline-block;
    background: var(--tag-bg);
    color: var(--tag-text);
    padding: 5px 16px;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin: 4px 6px 4px 0;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.tag:hover {
    background: transparent;
    border-color: var(--primary-400);
    transform: scale(1.05);
}

/* ---------- 文章列表 ---------- */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-item {
    background: var(--card-bg);
    padding: 28px 32px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.03);
}

.article-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-500), var(--accent-pink));
    opacity: 0;
    transition: opacity 0.4s;
}

.article-item:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.12);
    border-color: var(--primary-200);
}

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

.article-item h3 {
    font-size: 1.5rem;
    color: var(--text-heading);
    margin-bottom: 10px;
    font-weight: 700;
    transition: color 0.3s;
    line-height: 1.4;
}

.article-item:hover h3 {
    color: var(--primary-600);
}

.article-item p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 10px;
}

.meta {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.meta::before {
    content: '🕐';
    font-size: 0.9rem;
}

/* ---------- FAQ ---------- */
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-bottom: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.faq-item:hover {
    border-color: var(--primary-300);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.08);
}

.faq-q {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-heading);
    cursor: pointer;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
    user-select: none;
}

.faq-q:hover {
    background: var(--tag-bg);
}

.faq-q span {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--primary-500);
    transition: transform 0.3s;
    line-height: 1;
}

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

.faq-a {
    color: var(--text-secondary);
    padding: 0 24px 20px;
    line-height: 1.8;
    font-size: 0.95rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-a[hidden] {
    display: block;
    max-height: 0;
    padding: 0 24px;
}

.faq-item.active .faq-a {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ---------- 统计数字 ---------- */
.stats {
    display: flex;
    gap: 28px;
    margin: 50px 0;
}

.stat-item {
    text-align: center;
    background: var(--card-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 32px 24px;
    border-radius: 24px;
    flex: 1;
    border: 1px solid var(--border-color);
    transition: all 0.4s;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
    border-color: var(--primary-300);
}

.stat-num {
    font-size: 3.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-600), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    margin-top: 8px;
}

/* ---------- 表格 ---------- */
.history-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin: 20px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.history-table th,
.history-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.history-table th {
    background: linear-gradient(135deg, var(--tag-bg), var(--primary-100));
    color: var(--tag-text);
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.history-table tr:last-child td {
    border-bottom: none;
}

.history-table tr {
    transition: background 0.3s;
}

.history-table tbody tr:hover {
    background: var(--tag-bg);
}

/* ---------- SVG / Banner ---------- */
.svg-banner {
    background: linear-gradient(135deg, var(--card-bg), var(--tag-bg));
    border-radius: 24px;
    padding: 20px;
    text-align: center;
    margin: 30px 0;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.svg-banner svg {
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* ---------- 联系卡片 ---------- */
.contact-card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    margin-top: 30px;
}

.contact-card h3 {
    color: var(--text-heading);
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-card p::before {
    font-size: 1.2rem;
}

.contact-card p:first-of-type::before { content: '📍'; }
.contact-card p:nth-of-type(2)::before { content: '📞'; }
.contact-card p:last-of-type::before { content: '✉️'; }

/* ---------- HowTo 区块 ---------- */
.howto-box {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    margin-top: 20px;
}

.howto-box h3 {
    color: var(--text-heading);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.howto-box ol {
    padding-left: 24px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    counter-reset: howto-counter;
}

.howto-box ol li {
    margin-bottom: 12px;
    line-height: 1.8;
}

.howto-box p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.howto-box strong {
    color: var(--text-heading);
}

/* ---------- 友情链接 ---------- */
.friend-links {
    margin: 50px 0;
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.friend-links h3 {
    color: var(--text-heading);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.friend-links p {
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.friend-links p a {
    padding: 4px 12px;
    border-radius: 20px;
    background: var(--tag-bg);
    color: var(--tag-text);
    font-size: 0.9rem;
    transition: all 0.3s;
}

.friend-links p a:hover {
    background: var(--primary-500);
    color: #fff;
    transform: translateY(-2px);
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 70px 24px 30px;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink), var(--accent-cyan));
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.footer h4 {
    color: var(--footer-heading);
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
    position: relative;
    padding-bottom: 12px;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink));
    border-radius: 2px;
}

.footer a {
    color: var(--footer-text);
    display: block;
    margin-bottom: 12px;
    transition: all 0.3s;
    font-weight: 400;
    font-size: 0.95rem;
}

.footer a:hover {
    color: var(--footer-heading);
    transform: translateX(4px);
    text-decoration: none;
}

.footer p {
    color: var(--footer-text);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.footer-bottom {
    border-top: 1px solid var(--footer-border);
    margin-top: 50px;
    padding-top: 24px;
    text-align: center;
    color: var(--footer-text);
    font-size: 0.85rem;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.4rem;
    box-shadow: var(--btn-shadow);
    z-index: 999;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    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(1.05);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

/* ---------- 滚动动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 延迟动画 */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ---------- 玻璃拟态工具类 ---------- */
.glass {
    background: var(--card-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--border-light);
}

/* ---------- 渐变文字 ---------- */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-500), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- 按钮 ---------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--btn-bg);
    color: var(--btn-text);
    border-radius: 50px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: var(--btn-shadow);
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 1rem;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
    color: var(--btn-text);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    border-color: var(--primary-400);
    color: var(--primary-600);
    transform: translateY(-2px);
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.6rem;
    }
    
    .section-title {
        font-size: 1.9rem;
    }
    
    .stats {
        flex-wrap: wrap;
    }
    
    .stat-item {
        min-width: 200px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 18px;
    }
    
    .navbar-inner {
        padding: 12px 18px;
    }
    
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .mobile-menu.open {
        display: flex;
        max-height: 500px;
    }
    
    .hero {
        padding: 60px 18px;
        border-radius: 0 0 32px 32px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
        margin: 40px 0 20px;
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .article-item {
        padding: 20px;
    }
    
    .article-item h3 {
        font-size: 1.3rem;
    }
    
    .footer-grid {
        gap: 30px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero .btn {
        padding: 12px 24px;
        font-size: 1rem;
    }
    
    .logo {
        font-size: 1.4rem;
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .stat-num {
        font-size: 2.4rem;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .navbar,
    .hero,
    .footer,
    .back-to-top,
    .theme-toggle,
    .menu-toggle {
        display: none !important;
    }
    
    body {
        background: #fff;
        color: #000;
    }
    
    .card,
    .article-item,
    .faq-item {
        break-inside: avoid;
        border: 1px solid #ccc;
    }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* 动画工具类 */
.animate-float {
    animation: floatAnimation 4s ease-in-out infinite;
}

.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-scale-in {
    animation: scaleIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
    * {
        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::before {
    background: linear-gradient(90deg, var(--primary-500), var(--accent-pink), var(--accent-cyan));
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #020617 0%, #1E1B4B 50%, #4C1D95 100%);
}

[data-theme="dark"] .hero h1 {
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .theme-toggle {
    background: var(--dark-card-bg);
    border-color: var(--dark-border);
}

/* FAQ 动画优化 */
.faq-item .faq-a {
    transition: max-height 0.4s ease, padding 0.4s ease, opacity 0.3s;
    opacity: 0;
}

.faq-item.active .faq-a {
    opacity: 1;
}

/* 卡片图标装饰 */
.card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.2));
}

/* 文章分类标签组 */
.tag-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}

/* 文章元信息行 */
.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 16px;
    flex-wrap: wrap;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 彩色横幅 */
.banner-strip {
    background: linear-gradient(90deg, var(--primary-600), var(--accent-pink), var(--accent-cyan));
    padding: 20px;
    border-radius: 16px;
    color: #fff;
    text-align: center;
    font-weight: 600;
    margin: 30px 0;
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.2);
}

/* 确保所有文本在暗色模式下可读 */
[data-theme="dark"] .footer-bottom {
    border-top-color: var(--dark-footer-border);
}

[data-theme="dark"] .contact-card {
    background: var(--dark-card-bg);
}

/* 全局链接边距修正 */
a {
    -webkit-tap-highlight-color: transparent;
}

/* 按钮和交互元素的触控优化 */
button {
    -webkit-tap-highlight-color: transparent;
    font-family: inherit;
}

/* 表格响应式 */
@media (max-width: 640px) {
    .history-table {
        overflow-x: auto;
        display: block;
        white-space: nowrap;
    }
}

/* 卡片内列表样式 */
.card ul {
    list-style: none;
    padding: 0;
    margin: 12px 0;
}

.card ul li {
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card ul li:last-child {
    border-bottom: none;
}

.card ul li::before {
    content: '✦';
    color: var(--primary-500);
    font-size: 0.8rem;
}

/* 间距助手类 */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

/* 文本对齐 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Flexbox 工具 */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.gap-4 { gap: 24px; }

/* 隐藏元素 */
.hidden { display: none !important; }

/* 暗色模式下的滚动条 */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-700), var(--accent-pink));
}

/* 焦点可见性 */
:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* 安全区域适配 */
@supports (padding: env(safe-area-inset-bottom)) {
    .footer {
        padding-bottom: calc(30px + env(safe-area-inset-bottom));
    }
    
    .back-to-top {
        bottom: calc(30px + env(safe-area-inset-bottom));
    }
}

/* 终极性能保障 */
* {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
```