:root {
    --bg-body: #f5f7fa;
    --bg-card: #ffffff;
    --bg-nav: #ffffff;
    --bg-footer: #1a2332;
    --bg-banner: #1e3a5f;
    --bg-tag: #eef2f7;
    --bg-btn-primary: #1e3a5f;
    --bg-btn-hover: #15293f;
    --bg-input: #ffffff;
    --text-primary: #17202A;
    --text-secondary: #334155;
    --text-muted: #4b5563;
    --text-heading: #0f172a;
    --text-on-dark: #f1f5f9;
    --text-on-dark-muted: #cbd5e1;
    --text-link: #1e3a5f;
    --text-link-hover: #0f172a;
    --border-color: #d1d9e6;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --success: #166534;
    --warning: #92400e;
    --radius: 8px;
    --radius-lg: 12px;
    --transition: 0.2s ease;
    --banner-gradient: linear-gradient(135deg, #1e3a5f 0%, #2d5a8e 40%, #1a4a7a 70%, #0f2b4a 100%);
    --banner-overlay: radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.25) 0%, transparent 60%),
                      radial-gradient(ellipse at 80% 20%, rgba(99, 102, 241, 0.2) 0%, transparent 50%),
                      radial-gradient(ellipse at 60% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.35);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.12);
    --glass-blur: 16px;
    --card-gradient-hover: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, rgba(99, 102, 241, 0.06) 100%);
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-nav: #1e293b;
    --bg-footer: #0b1120;
    --bg-banner: #0f172a;
    --bg-tag: #2d3a4f;
    --bg-btn-primary: #3b82f6;
    --bg-btn-hover: #2563eb;
    --bg-input: #1e293b;
    --text-primary: #E5E7EB;
    --text-secondary: #E2E8F0;
    --text-muted: #cbd5e1;
    --text-heading: #F8FAFC;
    --text-on-dark: #F1F5F9;
    --text-on-dark-muted: #cbd5e1;
    --text-link: #93c5fd;
    --text-link-hover: #bfdbfe;
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --accent: #3b82f6;
    --accent-dark: #2563eb;
    --banner-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #1e3a5f 70%, #0b1120 100%);
    --banner-overlay: radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.2) 0%, transparent 60%),
                      radial-gradient(ellipse at 80% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                      radial-gradient(ellipse at 60% 80%, rgba(37, 99, 235, 0.12) 0%, transparent 50%);
    --glass-bg: rgba(30, 41, 59, 0.75);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass-blur: 16px;
    --card-gradient-hover: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(99, 102, 241, 0.1) 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.75;
    font-size: 16px;
    transition: background-color var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.35;
    transition: color var(--transition);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.6rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.05rem; margin-bottom: 0.5rem; }

p {
    color: var(--text-primary);
    margin-bottom: 0.9rem;
    transition: color var(--transition);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: 0.5px;
    transition: color var(--transition), transform var(--transition);
}

.logo:hover {
    transform: scale(1.03);
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding-bottom: 2px;
}

.nav-links a::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width 0.25s ease;
}

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

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

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

.theme-toggle {
    background: var(--bg-tag);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition), color var(--transition), transform 0.3s ease, box-shadow var(--transition);
}

.theme-toggle:hover {
    background-color: var(--border-color);
    color: var(--text-heading);
    transform: rotate(20deg) scale(1.08);
    box-shadow: var(--shadow-md);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: color var(--transition), transform var(--transition);
}

.mobile-menu-btn:hover {
    transform: scale(1.1);
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0 0.75rem;
    height: 38px;
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 160px;
    transition: width 0.3s ease;
}

.search-box input:focus {
    width: 200px;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: color var(--transition), transform var(--transition);
}

.search-box button:hover {
    color: var(--accent);
    transform: scale(1.15);
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ===== Banner 轮播 ===== */
.banner {
    position: relative;
    background: var(--banner-gradient);
    color: var(--text-on-dark);
    overflow: hidden;
    min-height: 340px;
}

.banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--banner-overlay);
    pointer-events: none;
}

.banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='1.5'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.8;
}

.banner-slide {
    display: none;
    padding: 3.5rem 0;
    min-height: 340px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.banner-slide.active {
    display: flex;
    animation: bannerFadeIn 0.7s ease forwards;
}

@keyframes bannerFadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.banner-content {
    max-width: 700px;
}

.banner-content h1 {
    color: #ffffff;
    font-size: 2.2rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
    letter-spacing: 0.5px;
}

.banner-content p {
    color: #e2e8f0;
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.25);
    line-height: 1.8;
}

.banner-btn {
    display: inline-block;
    background: rgba(255, 255, 255, 0.95);
    color: #1e3a5f;
    padding: 0.7rem 1.8rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color var(--transition), color var(--transition), transform 0.25s ease, box-shadow 0.25s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(4px);
}

.banner-btn:hover {
    background: #ffffff;
    color: #0f172a;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.banner-dots {
    position: absolute;
    bottom: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 2;
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    border: none;
    transition: background-color var(--transition), transform 0.25s ease, width 0.3s ease;
}

.banner-dot.active {
    background: #ffffff;
    width: 26px;
    border-radius: 5px;
    transform: scale(1);
}

.banner-dot:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: scale(1.2);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 1rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

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

.breadcrumb span {
    margin: 0 0.4rem;
    color: var(--text-muted);
}

/* ===== 通用区块 ===== */
.section {
    padding: 3rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 2rem;
}

.section-title h2 {
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: "";
    display: block;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    border-radius: 2px;
    margin: 0.6rem auto 0;
}

.section-title p {
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--card-gradient-hover);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

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

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

.card > * {
    position: relative;
    z-index: 1;
}

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

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

/* ===== 数字统计 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: center;
}

.stat-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1rem;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-item::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    transform: scaleX(0);
    transition: transform 0.35s ease;
}

.stat-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.stat-item:hover::after {
    transform: scaleX(1);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
    transition: color var(--transition);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* ===== 文章卡片 ===== */
.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.article-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

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

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

.article-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.article-meta span:first-child {
    color: var(--accent);
    font-weight: 600;
}

.article-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    transition: color var(--transition);
}

.article-card:hover h3 {
    color: var(--accent);
}

.article-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
}

.read-more {
    display: inline-block;
    margin-top: 0.75rem;
    font-weight: 600;
    color: var(--text-link);
    font-size: 0.9rem;
    transition: color var(--transition), transform 0.25s ease;
}

.read-more:hover {
    color: var(--text-link-hover);
    transform: translateX(4px);
    text-decoration: none;
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition), color var(--transition);
    font-family: inherit;
    line-height: 1.5;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 1.25rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.faq-answer.open {
    max-height: 500px;
    padding: 0 1.25rem 1.25rem;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.faq-icon {
    font-size: 1.2rem;
    color: var(--accent);
    transition: transform 0.35s ease, color var(--transition);
    flex-shrink: 0;
    margin-left: 0.75rem;
}

.faq-icon.open {
    transform: rotate(45deg);
}

/* ===== HowTo ===== */
.howto-step {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.25rem;
    align-items: flex-start;
    transition: transform 0.25s ease;
}

.howto-step:hover {
    transform: translateX(4px);
}

.step-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.howto-step:hover .step-num {
    transform: scale(1.1);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
}

.step-content h4 {
    margin-bottom: 0.25rem;
}

.step-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ===== 表格 ===== */
.info-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition), box-shadow var(--transition);
}

.info-table th {
    background: var(--bg-tag);
    color: var(--text-heading);
    font-weight: 600;
    text-align: left;
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition), color var(--transition);
}

.info-table td {
    padding: 0.85rem 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
    transition: color var(--transition), border-color var(--transition);
}

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

.info-table tr:hover td {
    background: var(--bg-tag);
}

/* ===== 标签 ===== */
.tag {
    display: inline-block;
    background: var(--bg-tag);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    margin: 0.2rem;
    border: 1px solid var(--border-color);
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform 0.2s ease;
}

.tag:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
    transform: translateY(-1px);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: background-color var(--transition), color var(--transition), transform 0.25s ease, box-shadow 0.25s ease;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--bg-btn-hover);
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 58, 95, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--text-link);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-tag);
    color: var(--text-heading);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-btn-primary);
    color: #ffffff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 999;
    transition: background-color var(--transition), opacity var(--transition), transform 0.3s ease, box-shadow 0.3s ease;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background: var(--bg-btn-hover);
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-footer);
    color: var(--text-on-dark);
    padding: 3rem 0 1.5rem;
    margin-top: 2rem;
    transition: background-color var(--transition);
    position: relative;
}

.footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #6366f1, var(--accent-dark));
}

.footer h4 {
    color: #ffffff;
    margin-bottom: 1rem;
    font-size: 1rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.footer p,
.footer li,
.footer a {
    color: var(--text-on-dark-muted);
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer a {
    transition: color var(--transition), transform 0.2s ease;
    display: inline-block;
}

.footer a:hover {
    color: #ffffff;
    transform: translateX(3px);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 0.8rem;
    margin: 0;
}

/* ===== 作者信息 ===== */
.author-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-top: 1rem;
    box-shadow: var(--glass-shadow);
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform 0.3s ease;
}

.author-box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
    transition: transform 0.3s ease;
}

.author-box:hover .author-avatar {
    transform: scale(1.08);
}

.author-info p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.author-info strong {
    color: var(--text-heading);
    font-size: 0.95rem;
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ===== 可读性强化 ===== */
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-heading { color: var(--text-heading); }
.highlight { color: var(--accent); font-weight: 600; }

/* ===== 列表样式 ===== */
.content-list {
    list-style: none;
    padding: 0;
}

.content-list li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    position: relative;
    color: var(--text-primary);
    font-size: 0.95rem;
    border-bottom: 1px dashed var(--border-color);
    transition: color var(--transition), border-color var(--transition), padding-left 0.25s ease, background-color var(--transition);
}

.content-list li:last-child {
    border-bottom: none;
}

.content-list li::before {
    content: "•";
    position: absolute;
    left: 0.25rem;
    color: var(--accent);
    font-weight: 700;
    transition: transform 0.25s ease, color var(--transition);
}

.content-list li:hover {
    padding-left: 1.85rem;
    background: var(--bg-tag);
    border-radius: 4px;
}

.content-list li:hover::before {
    transform: scale(1.4);
}

.card h3,
.card h4 {
    color: var(--text-heading);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== 链接列表 ===== */
.link-list {
    list-style: none;
    padding: 0;
}

.link-list li {
    margin-bottom: 0.5rem;
}

.link-list a {
    color: var(--text-on-dark-muted);
    font-size: 0.85rem;
    transition: color var(--transition), transform 0.2s ease;
    display: inline-block;
}

.link-list a:hover {
    color: #ffffff;
    transform: translateX(3px);
}

/* ===== 按钮文字强制对比 ===== */
.btn-primary,
.banner-btn {
    color: #ffffff !important;
}

/* ===== 确保所有正文可读 ===== */
body, p, li, td, th, label, input, textarea, select {
    color: var(--text-primary);
}

/* ===== 辅助文字 ===== */
small, .small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(var(--glass-blur));
        -webkit-backdrop-filter: blur(var(--glass-blur));
        padding: 1rem;
        border-bottom: 1px solid var(--glass-border);
        box-shadow: var(--shadow-lg);
        gap: 0.75rem;
        animation: menuSlideDown 0.3s ease forwards;
    }
    @keyframes menuSlideDown {
        from {
            opacity: 0;
            transform: translateY(-8px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    .nav-links.open a {
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.open a::after {
        display: none;
    }
    .search-box {
        display: none;
    }
    .banner-content h1 {
        font-size: 1.8rem;
    }
    .author-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    h1 {
        font-size: 1.5rem;
    }
    .banner-content h1 {
        font-size: 1.5rem;
    }
    .banner-content p {
        font-size: 0.95rem;
    }
    .section {
        padding: 2rem 0;
    }
    .banner {
        min-height: 280px;
    }
    .banner-slide {
        min-height: 280px;
        padding: 2.5rem 0;
    }
    .back-to-top {
        bottom: 1.25rem;
        right: 1.25rem;
        width: 40px;
        height: 40px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .info-table {
        font-size: 0.85rem;
    }
    .info-table th,
    .info-table td {
        padding: 0.65rem 0.75rem;
    }
    .card {
        padding: 1.25rem;
    }
    .article-card {
        padding: 1.25rem;
    }
    .faq-question {
        padding: 0.85rem 1rem;
        font-size: 0.95rem;
    }
}

/* ===== 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;
    }
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .navbar,
    .banner,
    .back-to-top,
    .footer,
    .theme-toggle,
    .mobile-menu-btn,
    .search-box {
        display: none !important;
    }
    body {
        background: #ffffff;
        color: #000000;
        font-size: 12pt;
    }
    .card,
    .article-card,
    .faq-item {
        box-shadow: none;
        border: 1px solid #cccccc;
        break-inside: avoid;
    }
    a {
        color: #000000;
        text-decoration: underline;
    }
    .container {
        max-width: 100%;
        padding: 0;
    }
}