/* 丝袜 - 全新原创样式表 v4 */
/* 域名: mlijqd.cn */

/* ========== CSS变量定义 ========== */
:root {
    --primary-color: #FF6B9D;
    --primary-dark: #E85A8A;
    --secondary-color: #FF8E72;
    --accent-color: #FFB347;
    --gradient-primary: linear-gradient(135deg, #FF6B9D 0%, #FF8E72 50%, #FFB347 100%);
    --gradient-hero: linear-gradient(135deg, rgba(255,107,157,0.9) 0%, rgba(255,142,114,0.85) 100%);
    --text-dark: #2D3436;
    --text-light: #636E72;
    --text-muted: #B2BEC3;
    --bg-light: #FFF9FA;
    --bg-card: #FFFFFF;
    --border-color: #FFE4EC;
    --shadow-sm: 0 2px 8px rgba(255,107,157,0.1);
    --shadow-md: 0 4px 20px rgba(255,107,157,0.15);
    --shadow-lg: 0 8px 40px rgba(255,107,157,0.2);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--bg-light);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

/* ========== 通用容器 ========== */
.container {
    width: 100%;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ========== 顶部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 42px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 10px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(255,107,157,0.08);
}

.nav-cta {
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff !important;
    border-radius: var(--radius-lg);
    font-weight: 600;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== 搜索框 ========== */
.search-bar {
    background: linear-gradient(135deg, rgba(255,107,157,0.05) 0%, rgba(255,142,114,0.05) 100%);
    padding: 16px 0;
    margin-top: 72px;
}

.search-container {
    max-width: 680px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 16px 60px 16px 24px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    background: #fff;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255,107,157,0.1);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
}

.search-btn svg {
    width: 20px;
    height: 20px;
    fill: #fff;
}

/* ========== 英雄区域 ========== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    padding: 60px 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: #4CD964;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}

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

/* ========== 视频卡片网格 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.video-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-thumb img {
    transform: scale(1.08);
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover .video-play {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.video-play svg {
    width: 24px;
    height: 24px;
    fill: #fff;
    margin-left: 4px;
}

.video-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    padding: 4px 10px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.video-tag {
    padding: 4px 12px;
    background: rgba(255,107,157,0.08);
    color: var(--primary-color);
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

/* ========== 分类标签导航 ========== */
.category-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.category-btn {
    padding: 10px 24px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition);
}

.category-btn:hover,
.category-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
}

/* ========== 专家团队 ========== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.expert-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
    border: 4px solid var(--border-color);
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.expert-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.expert-role {
    font-size: 0.95rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.expert-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.expert-certs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.cert-badge {
    padding: 4px 12px;
    background: rgba(255,179,71,0.15);
    color: var(--accent-color);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
}

.expert-btn {
    padding: 10px 24px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.expert-btn:hover {
    transform: scale(1.05);
}

/* ========== AI功能展示 ========== */
.ai-features {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.ai-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.ai-card:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-4px);
}

.ai-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.ai-icon svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}

.ai-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.ai-desc {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

/* ========== 社区功能 ========== */
.community-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.community-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.community-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.community-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(255,107,157,0.1) 0%, rgba(255,142,114,0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.community-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--primary-color);
}

.community-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* ========== 用户评价 ========== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 28px;
}

.testimonial-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.testimonial-content {
    font-size: 1rem;
    color: var(--text-dark);
    line-height: 1.8;
    margin-bottom: 20px;
    position: relative;
    padding-left: 24px;
}

.testimonial-content::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -8px;
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
}

.testimonial-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.testimonial-info span {
    font-size: 0.85rem;
    color: var(--text-light);
}

.testimonial-rating {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}

.testimonial-rating svg {
    width: 16px;
    height: 16px;
    fill: var(--accent-color);
}

/* ========== FAQ区域 ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

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

.faq-question svg {
    width: 20px;
    height: 20px;
    fill: var(--text-light);
    transition: var(--transition);
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
    fill: var(--primary-color);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 24px 20px;
    max-height: 500px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========== 联系我们 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.contact-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.contact-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}

.contact-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.contact-info {
    font-size: 0.95rem;
    color: var(--text-light);
}

.qrcode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.qrcode-item {
    text-align: center;
}

.qrcode-img {
    width: 160px;
    height: 160px;
    margin: 0 auto 12px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.qrcode-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.qrcode-label {
    font-size: 0.95rem;
    color: var(--text-dark);
    font-weight: 500;
}

/* ========== 页脚 ========== */
.footer {
    background: linear-gradient(135deg, #2D3436 0%, #1a1a2e 100%);
    color: #fff;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: #fff;
    -webkit-text-fill-color: #fff;
}

.footer-desc {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
}

.social-link svg {
    width: 18px;
    height: 18px;
    fill: #fff;
}

.footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
}

.footer-legal a:hover {
    color: var(--primary-color);
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    padding: 16px 0;
    background: var(--bg-light);
    margin-top: 72px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/';
    color: var(--text-muted);
}

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

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

.breadcrumb-list .current {
    color: var(--primary-color);
    font-weight: 500;
}

/* ========== 内页样式 ========== */
.page-header {
    background: var(--gradient-primary);
    padding: 80px 0;
    text-align: center;
    color: #fff;
    margin-top: 72px;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
}

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========== 懒加载占位 ========== */
.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* ========== 合作伙伴 ========== */
.partner-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    padding: 40px 0;
}

.partner-logo {
    height: 48px;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: var(--transition);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* ========== 更新时间 ========== */
.update-time {
    text-align: center;
    padding: 16px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}