/* ========== 移动端侧滑菜单样式 ========== */

/* 移动端菜单按钮 */
.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    position: relative;
    z-index: 2001;
    right: 25px;
    transition: transform 0.3s ease;
}

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

.mobile-menu-button .hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: all 0.3s ease;
}

.mobile-menu-button .hamburger::before,
.mobile-menu-button .hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.mobile-menu-button .hamburger::before {
    top: -8px;
}

.mobile-menu-button .hamburger::after {
    bottom: -8px;
}

/* 激活状态的汉堡按钮 */
.mobile-menu-button.active .hamburger {
    background: transparent;
}

.mobile-menu-button.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-button.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* 侧滑菜单容器 */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    max-width: 85%;
    height: 100%;
    background: white;
    z-index: 2000;
    padding: 80px 0 30px;
    overflow-y: auto;
    transition: right 0.3s ease;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.15);
}

.mobile-menu.active {
    right: 0;
}

/* 移动端菜单项 */
.mobile-nav-item {
    border-bottom: 1px solid var(--gray-medium);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.mobile-nav-link:hover {
    background: var(--gray-light);
    color: var(--primary-blue);
    padding-left: 32px;
}

.mobile-nav-link .arrow {
    font-size: 12px;
    transition: transform 0.3s ease;
}

.mobile-nav-item.open .mobile-nav-link .arrow {
    transform: rotate(180deg);
}

/* 移动端子菜单 */
.mobile-submenu {
    display: none;
    background: var(--gray-light);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-submenu.open {
    display: block;
    max-height: 500px;
}

.mobile-submenu-link {
    display: block;
    padding: 14px 24px 14px 40px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

.mobile-submenu-link:hover {
    background: white;
    color: var(--primary-blue);
    padding-left: 48px;
}

/* 移动端CTA按钮 */
.mobile-cta {
    margin: 20px 60px;
}

.mobile-cta a {
    display: block;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
}

.mobile-cta a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 204, 0.4);
}

/* 禁止页面滚动 */
body.menu-open {
    overflow: hidden;
}

/* ========== 导航栏滚动效果 ========== */

.main-nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.main-nav.scrolled .nav-link {
    color: var(--text-primary);
}

.main-nav.scrolled .nav-link:hover,
.main-nav.scrolled .nav-link.active {
    color: var(--primary-blue);
}

/* ========== 图片懒加载样式 ========== */

.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease;
    filter: blur(10px);
}

.lazy-load.loaded {
    opacity: 1;
    filter: blur(0);
}

/* 懒加载占位符 */
.lazy-placeholder {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.lazy-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    100% {
        left: 100%;
    }
}

.lazy-placeholder::after {
    content: '📷';
    font-size: 48px;
    opacity: 0.3;
}

/* ========== 响应式调整 ========== */

@media (max-width: 768px) {
    .mobile-menu-button {
        display: block;
    }

    .mobile-menu-overlay {
        display: block;
    }

    .mobile-menu {
        display: block;
    }

    .nav-links {
        display: none;
    }

    /* 顶部信息栏在移动端隐藏 */
    .top-bar {
        display: none;
    }

    /* 调整导航栏高度 */
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .nav-content {
        padding: 0 20px;
    }

    /* 添加顶部占位，防止内容被导航栏遮挡 */
    body {
        padding-top: 80px;
    }
}

@media (max-width: 480px) {
    .mobile-menu {
      
        max-width: 100%;
    }

    .mobile-nav-link {
        font-size: 15px;
        padding: 14px 20px;
    }

    .mobile-submenu-link {
        font-size: 13px;
        padding: 12px 20px 12px 36px;
    }
}