```css
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d0f14;
    --bg-secondary: #14171e;
    --bg-card: #1a1e27;
    --bg-hover: #222733;
    --text-primary: #e8eaf0;
    --text-secondary: #9aa0b0;
    --text-muted: #6b7185;
    --accent: #f5c518;
    --accent-hover: #ffd83d;
    --accent-glow: rgba(245, 197, 24, 0.25);
    --border: #262b38;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --max-width: 1200px;
    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: 0.2s ease;
    --glass-bg: rgba(26, 30, 39, 0.72);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 20px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 10% 20%, rgba(245, 197, 24, 0.04), transparent 60%),
        radial-gradient(ellipse 60% 50% at 90% 80%, rgba(245, 197, 24, 0.03), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ===== 导航吸顶 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(13, 15, 20, 0.78);
    backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    transition: box-shadow var(--transition), background var(--transition);
}

.site-header.scrolled {
    background: rgba(13, 15, 20, 0.92);
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5), 0 1px 0 var(--glass-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.15rem;
    flex-shrink: 0;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.85;
}

.logo svg {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    border-radius: 8px;
    transition: transform var(--transition);
}

.logo:hover svg {
    transform: rotate(-6deg) scale(1.05);
}

.logo span {
    color: var(--accent);
    background: linear-gradient(135deg, var(--accent), #e6a800);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: transform var(--transition);
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
    color: var(--text-primary);
    background: var(--bg-hover);
    outline: none;
}

.nav-menu a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 22px;
    padding: 4px 12px 4px 16px;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(26, 30, 39, 0.9);
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    padding: 6px 0;
    width: 120px;
    outline: none;
    font-family: inherit;
}

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

.search-box button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

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

.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: rotate(20deg) scale(1.08);
    box-shadow: 0 0 16px var(--accent-glow);
}

.mobile-menu-btn {
    display: none;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.mobile-menu-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ===== Banner轮播 ===== */
.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0d0f14 0%, #161b26 40%, #1a1e27 100%);
    border-bottom: 1px solid var(--border);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 80% at 15% 50%, rgba(245, 197, 24, 0.08), transparent 60%),
        radial-gradient(ellipse 50% 60% at 85% 30%, rgba(245, 197, 24, 0.05), transparent 60%),
        radial-gradient(ellipse 60% 50% at 50% 100%, rgba(245, 197, 24, 0.06), transparent 60%);
    pointer-events: none;
}

.hero-slider {
    position: relative;
    height: 460px;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.9s cubic-bezier(0.4, 0, 0.2, 1), transform 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    transform: scale(1.02);
    display: flex;
    align-items: center;
    pointer-events: none;
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.hero-slide .container {
    display: flex;
    align-items: center;
    gap: 48px;
    width: 100%;
}

.hero-text {
    flex: 1;
    max-width: 580px;
}

.hero-badge {
    display: inline-block;
    background: rgba(245, 197, 24, 0.12);
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 5px 16px;
    border-radius: 20px;
    margin-bottom: 18px;
    letter-spacing: 0.04em;
    border: 1px solid rgba(245, 197, 24, 0.15);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 197, 24, 0.15); }
    50% { box-shadow: 0 0 0 6px rgba(245, 197, 24, 0); }
}

.hero h1 {
    font-size: 2.7rem;
    font-weight: 800;
    line-height: 1.22;
    margin-bottom: 18px;
    letter-spacing: -0.02em;
}

.hero h1 em {
    font-style: normal;
    background: linear-gradient(135deg, var(--accent), #ffd83d, #e6a800);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.02rem;
    margin-bottom: 30px;
    line-height: 1.85;
}

.hero-btns {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 26px;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #e6a800);
    color: #0d0f14;
    box-shadow: 0 4px 16px rgba(245, 197, 24, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(245, 197, 24, 0.4);
}

.btn-outline {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(245, 197, 24, 0.15);
}

.hero-visual {
    flex: 0 0 340px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-visual svg {
    width: 100%;
    max-width: 320px;
    height: auto;
    filter: drop-shadow(0 8px 32px rgba(245, 197, 24, 0.12));
    animation: floatVisual 6s ease-in-out infinite;
}

@keyframes floatVisual {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.slider-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: var(--text-muted);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    padding: 0;
}

.slider-dots button.active {
    background: var(--accent);
    transform: scale(1.4);
    box-shadow: 0 0 12px var(--accent-glow);
}

.slider-dots button:hover {
    background: var(--accent-hover);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 16px 0;
    font-size: 0.82rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: var(--bg-primary);
    position: relative;
    z-index: 1;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.breadcrumb .sep {
    color: var(--text-muted);
    font-size: 0.7rem;
}

/* ===== 通用区块 ===== */
.section {
    padding: 72px 0;
    position: relative;
    z-index: 1;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section:nth-child(even)::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(245, 197, 24, 0.03), transparent 70%);
    pointer-events: none;
}

.section-header {
    margin-bottom: 44px;
    max-width: 720px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 12px;
    padding: 4px 12px;
    background: rgba(245, 197, 24, 0.08);
    border-radius: 6px;
    border: 1px solid rgba(245, 197, 24, 0.12);
}

.section-header h2 {
    font-size: 1.9rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
    letter-spacing: -0.01em;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.8;
}

.section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.section p {
    color: var(--text-secondary);
    line-height: 1.85;
}

/* ===== 数字动画 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 44px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.stat-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 12px 36px rgba(245, 197, 24, 0.12);
}

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

.stat-number {
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, var(--accent), #ffd83d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(245, 197, 24, 0.06), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(245, 197, 24, 0.1);
}

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

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(245, 197, 24, 0.15), rgba(245, 197, 24, 0.05));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
    border: 1px solid rgba(245, 197, 24, 0.12);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.08) rotate(-4deg);
    box-shadow: 0 0 20px var(--accent-glow);
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    transition: color var(--transition-fast);
}

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

.card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.78;
}

/* ===== 文章列表 ===== */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 22px;
}

.article-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.article-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

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

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.article-tag {
    background: rgba(245, 197, 24, 0.1);
    color: var(--accent);
    padding: 3px 12px;
    border-radius: 14px;
    font-size: 0.72rem;
    font-weight: 600;
    border: 1px solid rgba(245, 197, 24, 0.12);
    transition: background var(--transition-fast);
}

.article-item:hover .article-tag {
    background: rgba(245, 197, 24, 0.18);
}

.article-item h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.55;
    transition: color var(--transition-fast);
}

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

.article-item p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.72;
    flex: 1;
}

.article-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 16px;
    transition: gap var(--transition), color var(--transition-fast);
}

.article-link:hover {
    gap: 12px;
    color: var(--accent-hover);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    background: var(--bg-card);
}

.faq-item:hover {
    border-color: rgba(245, 197, 24, 0.3);
}

.faq-item.open {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(245, 197, 24, 0.1);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    transition: background var(--transition-fast), color var(--transition-fast);
    line-height: 1.5;
}

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

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

.faq-question .arrow {
    flex-shrink: 0;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), color var(--transition-fast);
    color: var(--accent);
}

.faq-item.open .faq-question .arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1), padding 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-secondary);
}

.faq-item.open .faq-answer {
    max-height: 600px;
}

.faq-answer-inner {
    padding: 20px 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.85;
}

/* ===== HowTo ===== */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 22px;
}

.howto-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    position: relative;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    overflow: hidden;
}

.howto-step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.howto-step:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

.howto-step:hover::before {
    transform: scaleX(1);
}

.step-num {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #e6a800);
    color: #0d0f14;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(245, 197, 24, 0.3);
    transition: transform var(--transition), box-shadow var(--transition);
}

.howto-step:hover .step-num {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(245, 197, 24, 0.45);
}

.howto-step h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.howto-step p {
    color: var(--text-secondary);
    font-size: 0.86rem;
    line-height: 1.72;
}

/* ===== 团队/EEAT ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 22px;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

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

.team-avatar {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #e6a800);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.7rem;
    font-weight: 800;
    color: #0d0f14;
    box-shadow: 0 6px 20px rgba(245, 197, 24, 0.25);
    transition: transform var(--transition), box-shadow var(--transition);
}

.team-card:hover .team-avatar {
    transform: scale(1.08);
    box-shadow: 0 8px 28px rgba(245, 197, 24, 0.4);
}

.team-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.team-role {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.team-card p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.68;
}

/* ===== 联系方式 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 36px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.contact-item:hover {
    transform: translateX(4px);
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(245, 197, 24, 0.08);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--accent);
    margin-top: 3px;
    transition: transform var(--transition);
}

.contact-item:hover svg {
    transform: scale(1.15);
}

.contact-item strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.contact-item span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== 页脚 ===== */
.site-footer {
    background: #080a0e;
    border-top: 1px solid var(--border);
    padding: 56px 0 28px;
    position: relative;
    z-index: 1;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.3;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 14px;
    line-height: 1.72;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 8px;
}

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

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.83rem;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    position: relative;
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #e6a800);
    color: #0d0f14;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.9);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 900;
    box-shadow: 0 4px 20px rgba(245, 197, 24, 0.35);
}

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

.back-to-top:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 28px rgba(245, 197, 24, 0.5);
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== 暗黑模式（默认暗色，浅色模式切换） ===== */
body.light-mode {
    --bg-primary: #f5f6f8;
    --bg-secondary: #eceef2;
    --bg-card: #ffffff;
    --bg-hover: #e4e7ed;
    --text-primary: #1a1e27;
    --text-secondary: #4a5060;
    --text-muted: #7a8090;
    --border: #d8dce4;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(0, 0, 0, 0.06);
    --accent-glow: rgba(245, 197, 24, 0.2);
}

body.light-mode::before {
    background:
        radial-gradient(ellipse 80% 60% at 10% 20%, rgba(245, 197, 24, 0.05), transparent 60%),
        radial-gradient(ellipse 60% 50% at 90% 80%, rgba(245, 197, 24, 0.04), transparent 60%);
}

body.light-mode .site-header {
    background: rgba(245, 246, 248, 0.78);
}

body.light-mode .site-header.scrolled {
    background: rgba(245, 246, 248, 0.92);
    box-shadow: 0 2px 24px rgba(0, 0, 0, 0.08);
}

body.light-mode .hero {
    background: linear-gradient(135deg, #eceef2 0%, #f0f2f6 40%, #f5f6f8 100%);
}

body.light-mode .hero::before {
    background:
        radial-gradient(ellipse 70% 80% at 15% 50%, rgba(245, 197, 24, 0.1), transparent 60%),
        radial-gradient(ellipse 50% 60% at 85% 30%, rgba(245, 197, 24, 0.06), transparent 60%);
}

body.light-mode .site-footer {
    background: #e8eaef;
}

body.light-mode .site-footer::before {
    opacity: 0.5;
}

body.light-mode .search-box {
    background: rgba(255, 255, 255, 0.8);
}

body.light-mode .search-box:focus-within {
    background: rgba(255, 255, 255, 0.95);
}

body.light-mode .btn-outline {
    background: rgba(255, 255, 255, 0.7);
}

body.light-mode .stat-card:hover {
    box-shadow: 0 12px 36px rgba(245, 197, 24, 0.15);
}

body.light-mode .card:hover {
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(245, 197, 24, 0.15);
}

body.light-mode .article-item:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

body.light-mode .team-card:hover {
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}

body.light-mode .howto-step:hover {
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.1rem;
    }

    .hero-visual {
        flex: 0 0 260px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .nav-menu a {
        font-size: 0.82rem;
        padding: 8px 8px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        padding: 14px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        animation: slideDown 0.3s ease;
    }

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

    .nav-menu.open {
        display: flex;
    }

    .nav-menu a {
        padding: 12px 16px;
        width: 100%;
        border-radius: var(--radius-sm);
    }

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

    .mobile-menu-btn {
        display: flex;
    }

    .search-box {
        display: none;
    }

    .hero-slider {
        height: auto;
        min-height: 560px;
    }

    .hero-slide .container {
        flex-direction: column;
        text-align: center;
        gap: 32px;
        padding-top: 44px;
        padding-bottom: 72px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 0.94rem;
    }

    .hero-btns {
        justify-content: center;
    }

    .hero-visual {
        flex: 0 0 auto;
    }

    .hero-visual svg {
        max-width: 220px;
    }

    .section {
        padding: 48px 0;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-slider {
        min-height: 520px;
    }

    .hero h1 {
        font-size: 1.45rem;
    }

    .hero p {
        font-size: 0.88rem;
    }

    .hero-badge {
        font-size: 0.72rem;
        padding: 4px 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .card-grid,
    .article-list,
    .howto-steps,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 11px 22px;
        font-size: 0.85rem;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .stat-number {
        font-size: 1.9rem;
    }

    .card {
        padding: 24px 20px;
    }

    .article-item {
        padding: 22px 20px;
    }

    .faq-question {
        padding: 16px 18px;
        font-size: 0.9rem;
    }

    .faq-answer-inner {
        padding: 16px 18px;
        font-size: 0.86rem;
    }

    .howto-step {
        padding: 24px 20px;
    }

    .team-card {
        padding: 24px 20px;
    }

    .contact-item {
        padding: 14px 16px;
    }
}

/* 无障碍焦点 */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* 减弱动画偏好 */
@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;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .hero-slide {
        transition: opacity 0.01ms;
    }
}

/* 打印 */
@media print {
    .site-header,
    .back-to-top,
    .hero-slider,
    .slider-dots,
    .theme-toggle,
    .mobile-menu-btn,
    .search-box {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    .section {
        padding: 20px 0;
        page-break-inside: avoid;
    }

    .card,
    .article-item,
    .faq-item,
    .howto-step,
    .team-card {
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
    }
}
```