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

:root {
    --primary: #0f3460;
    --primary-light: #1a4b7a;
    --accent: #e94560;
    --accent-hover: #c73a52;
    --bg-light: #f8f9fc;
    --bg-white: #ffffff;
    --text-dark: #1a1a2e;
    --text-mid: #4a4a6a;
    --text-light: #7a7a9a;
    --border: #e2e8f0;
    --shadow: 0 4px 20px rgba(15, 52, 96, 0.08);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.35);
    --glass-shadow: 0 8px 32px rgba(15, 52, 96, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
}

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

/* ========== 吸顶导航 - 毛玻璃 ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
    flex-shrink: 0;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.02);
}

.logo svg {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    transition: transform 0.4s ease;
}

.logo:hover svg {
    transform: rotate(-8deg) scale(1.08);
}

.logo span small {
    display: block;
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--text-light);
    letter-spacing: 1px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.main-nav a {
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-mid);
    font-weight: 500;
    white-space: nowrap;
    position: relative;
    transition: all var(--transition);
}

.main-nav 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);
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary);
    color: #fff;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: translateX(-50%) scaleX(1);
    background: rgba(255, 255, 255, 0.6);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 4px 4px 4px 16px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.1);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.85rem;
    width: 140px;
    color: var(--text-dark);
}

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

.search-box button {
    background: var(--primary);
    border: none;
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), transform var(--transition);
}

.search-box button:hover {
    background: var(--accent);
    transform: scale(1.08);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-mid);
    transition: all var(--transition);
}

.theme-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: rotate(20deg);
}

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    transition: all var(--transition);
}

.menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* ========== 面包屑 ========== */
.breadcrumb-bar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    font-size: 0.85rem;
    transition: background 0.4s ease, border-color 0.4s ease;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    color: var(--text-light);
}

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

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

.breadcrumb .sep {
    color: var(--text-light);
    font-size: 0.75rem;
}

/* ========== 主视觉 - 渐变Banner ========== */
.hero {
    position: relative;
    background: linear-gradient(135deg, #0f3460 0%, #1a4b7a 45%, #16213e 100%);
    color: #fff;
    padding: 70px 0 60px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.18) 0%, transparent 70%);
    border-radius: 50%;
    animation: floatGlow 12s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: floatGlow 15s ease-in-out infinite reverse;
}

@keyframes floatGlow {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    50% {
        transform: translate(30px, -30px) scale(1.1);
        opacity: 1;
    }
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(233, 69, 96, 0.2);
    border: 1px solid rgba(233, 69, 96, 0.4);
    color: #ff8fa3;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 20px;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    animation: pulseBadge 3s ease-in-out infinite;
}

@keyframes pulseBadge {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(233, 69, 96, 0.3);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(233, 69, 96, 0);
    }
}

.hero h1 {
    font-size: 2.4rem;
    line-height: 1.3;
    margin-bottom: 18px;
    font-weight: 700;
}

.hero h1 em {
    font-style: normal;
    color: #ff8fa3;
    position: relative;
}

.hero h1 em::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 6px;
    background: rgba(233, 69, 96, 0.25);
    border-radius: 3px;
    z-index: -1;
}

.hero p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 28px;
    line-height: 1.8;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(233, 69, 96, 0.35);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.7);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.stat-item {
    position: relative;
}

.stat-item .stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    color: #ff8fa3;
    line-height: 1.2;
}

.stat-item .stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ========== 轮播Banner ========== */
.banner-slider {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    margin: 30px 0;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: background 0.4s ease, border-color 0.4s ease;
}

.slides {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide {
    min-width: 100%;
    padding: 32px 28px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.slide-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition);
}

.slide:hover .slide-icon {
    transform: scale(1.1) rotate(-5deg);
}

.slide-content h3 {
    font-size: 1.15rem;
    margin-bottom: 6px;
    color: var(--text-dark);
}

.slide-content p {
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.7;
}

.slider-dots {
    position: absolute;
    bottom: 12px;
    right: 20px;
    display: flex;
    gap: 6px;
}

.slider-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: all var(--transition);
}

.slider-dots span.active {
    background: var(--accent);
    width: 20px;
    border-radius: 4px;
}

.slider-dots span:hover {
    background: var(--accent);
    opacity: 0.7;
}

/* ========== 通用区块 ========== */
.section {
    padding: 60px 0;
}

.section-alt {
    background: var(--bg-white);
    transition: background 0.4s ease;
}

.section-header {
    text-align: center;
    margin-bottom: 44px;
}

.section-header h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: var(--text-dark);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    transition: width var(--transition);
}

.section-header:hover h2::after {
    width: 80px;
}

.section-header p {
    color: var(--text-mid);
    max-width: 600px;
    margin: 0 auto;
    font-size: 0.95rem;
}

/* ========== 卡片网格 ========== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(15, 52, 96, 0.12);
    border-color: transparent;
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    transition: transform var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-5deg);
}

.card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.card p {
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.75;
}

/* ========== 文章列表 ========== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.article-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}

.article-card:hover {
    box-shadow: 0 8px 28px rgba(15, 52, 96, 0.1);
    border-color: transparent;
    transform: translateY(-3px);
}

.article-card:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

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

.article-meta .tag {
    background: rgba(15, 52, 96, 0.08);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 500;
    transition: all var(--transition);
}

.article-card:hover .article-meta .tag {
    background: var(--primary);
    color: #fff;
}

.article-card h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
    line-height: 1.5;
}

.article-card h3 a {
    color: var(--text-dark);
}

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

.article-card .summary {
    font-size: 0.88rem;
    color: var(--text-mid);
    line-height: 1.75;
    flex: 1;
    margin-bottom: 14px;
}

.read-more {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition);
}

.read-more:hover {
    color: var(--accent);
    gap: 8px;
}

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

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

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(15, 52, 96, 0.06);
}

.faq-item.open {
    border-color: var(--primary);
    box-shadow: 0 6px 20px rgba(15, 52, 96, 0.08);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    text-align: left;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: color var(--transition);
}

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

.faq-question .icon-plus {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
    font-size: 1rem;
    color: var(--text-mid);
}

.faq-item.open .faq-question .icon-plus {
    background: var(--accent);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 22px 20px;
    font-size: 0.9rem;
    color: var(--text-mid);
    line-height: 1.85;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

/* ========== HowTo 步骤 ========== */
.howto-steps {
    counter-reset: step;
    max-width: 800px;
    margin: 0 auto;
}

.howto-step {
    position: relative;
    padding: 0 0 32px 64px;
    counter-increment: step;
}

.howto-step:last-child {
    padding-bottom: 0;
}

.howto-step::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    transition: transform var(--transition), box-shadow var(--transition);
    z-index: 1;
}

.howto-step:hover::before {
    transform: scale(1.12);
    box-shadow: 0 4px 16px rgba(15, 52, 96, 0.3);
}

.howto-step::after {
    content: '';
    position: absolute;
    left: 20px;
    top: 48px;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.howto-step:last-child::after {
    display: none;
}

.howto-step h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--text-dark);
}

.howto-step p {
    font-size: 0.88rem;
    color: var(--text-mid);
    line-height: 1.8;
}

/* ========== 联系信息 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.contact-item {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: all var(--transition);
}

.contact-item:hover {
    box-shadow: 0 6px 20px rgba(15, 52, 96, 0.08);
    transform: translateY(-3px);
    border-color: transparent;
}

.contact-item .ci-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(15, 52, 96, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--primary);
    transition: all var(--transition);
}

.contact-item:hover .ci-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.08);
}

.contact-item h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.contact-item p {
    font-size: 0.85rem;
    color: var(--text-mid);
    line-height: 1.7;
}

.contact-item a {
    font-size: 0.85rem;
}

/* ========== 团队 ========== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.team-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: all var(--transition);
}

.team-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(15, 52, 96, 0.1);
    border-color: transparent;
}

.team-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    transition: transform var(--transition), box-shadow var(--transition);
}

.team-card:hover .team-avatar {
    transform: scale(1.1);
    box-shadow: 0 8px 24px rgba(15, 52, 96, 0.2);
}

.team-card h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.team-card .role {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 10px;
}

.team-card p {
    font-size: 0.82rem;
    color: var(--text-mid);
    line-height: 1.7;
}

/* ========== 页脚 ========== */
.site-footer {
    background: #0a1628;
    color: rgba(255, 255, 255, 0.75);
    padding: 56px 0 0;
    font-size: 0.88rem;
    transition: background 0.4s ease;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand .logo:hover svg {
    transform: rotate(-8deg) scale(1.08);
}

.footer-brand p {
    font-size: 0.85rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 16px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition);
}

.footer-social a:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-3px);
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 18px;
    font-weight: 600;
}

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

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

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    transition: color var(--transition), padding-left var(--transition);
    position: relative;
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.35s ease;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(15, 52, 96, 0.3);
}

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

.back-to-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(233, 69, 96, 0.4);
}

/* ========== 滚动动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 交错延迟 */
.card-grid .reveal:nth-child(1) { transition-delay: 0s; }
.card-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.card-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.card-grid .reveal:nth-child(4) { transition-delay: 0.24s; }

.article-grid .reveal:nth-child(1) { transition-delay: 0s; }
.article-grid .reveal:nth-child(2) { transition-delay: 0.06s; }
.article-grid .reveal:nth-child(3) { transition-delay: 0.12s; }
.article-grid .reveal:nth-child(4) { transition-delay: 0.18s; }
.article-grid .reveal:nth-child(5) { transition-delay: 0.24s; }

.team-grid .reveal:nth-child(1) { transition-delay: 0s; }
.team-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.team-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.team-grid .reveal:nth-child(4) { transition-delay: 0.24s; }

/* ========== 数值动画 ========== */
.stat-num[data-target] {
    transition: all 0.3s;
}

/* ========== 暗黑模式 ========== */
body.dark-mode {
    --bg-light: #0f0f1a;
    --bg-white: #1a1a2e;
    --text-dark: #e8e8f0;
    --text-mid: #b0b0c8;
    --text-light: #7a7a9a;
    --border: #2a2a40;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(26, 26, 46, 0.78);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

body.dark-mode .site-header {
    background: rgba(26, 26, 46, 0.88);
}

body.dark-mode .search-box {
    background: #0f0f1a;
}

body.dark-mode .search-box input {
    color: #e8e8f0;
}

body.dark-mode .hero {
    background: linear-gradient(135deg, #0a0a18 0%, #16213e 50%, #0f0f1a 100%);
}

body.dark-mode .card,
body.dark-mode .article-card,
body.dark-mode .faq-item,
body.dark-mode .contact-item,
body.dark-mode .team-card,
body.dark-mode .banner-slider {
    background: #1a1a2e;
}

body.dark-mode .card:hover,
body.dark-mode .article-card:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

body.dark-mode .site-footer {
    background: #050510;
}

body.dark-mode .breadcrumb-bar {
    background: #1a1a2e;
}

body.dark-mode .faq-question .icon-plus {
    background: #0f0f1a;
}

body.dark-mode .contact-item .ci-icon {
    background: rgba(255, 255, 255, 0.06);
}

body.dark-mode .article-meta .tag {
    background: rgba(255, 255, 255, 0.08);
}

body.dark-mode .hero h1 em::after {
    background: rgba(233, 69, 96, 0.2);
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        -webkit-backdrop-filter: blur(16px) saturate(180%);
        backdrop-filter: blur(16px) saturate(180%);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        gap: 4px;
    }

    .main-nav.open {
        display: flex;
        animation: slideDown 0.3s ease;
    }

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

    .main-nav a {
        width: 100%;
        padding: 12px 16px;
        border-radius: 8px;
    }

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

    .menu-toggle {
        display: flex;
    }

    .search-box input {
        width: 100px;
    }

    .hero h1 {
        font-size: 1.7rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-item .stat-num {
        font-size: 1.4rem;
    }

    .section {
        padding: 40px 0;
    }

    .section-header h2 {
        font-size: 1.4rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

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

    .slide {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
    }

    .slide-icon {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .header-inner {
        gap: 10px;
    }

    .logo span {
        display: none;
    }

    .search-box {
        display: none;
    }

    .hero h1 {
        font-size: 1.4rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }

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

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

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

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

/* ========== 辅助类 ========== */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 4px;
}

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

body.dark-mode ::-webkit-scrollbar-track {
    background: #0f0f1a;
}

body.dark-mode ::-webkit-scrollbar-thumb {
    background: #2a2a40;
}

body.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* ========== 选中文本 ========== */
::selection {
    background: rgba(233, 69, 96, 0.25);
    color: var(--text-dark);
}

body.dark-mode ::selection {
    background: rgba(233, 69, 96, 0.4);
    color: #fff;
}

/* ========== 焦点可见性 ========== */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

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

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