/* 重置和基础样式 */
.main-header * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 顶部导航栏样式 - 使用CSS变量控制背景和文字颜色 */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--main-header-1280);
    background-color: var(--nav-bg-color);
    box-shadow: var(--shadow-light);
    z-index: 1000;
    transition: all var(--transition-normal) ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 深色主题下的特殊处理 */
.nav-theme-dark.main-header {
    border-bottom: 1px solid var(--nav-border-dark);
}

/* 深色主题下的logo颜色调整 */
.nav-theme-dark .logo-text {
    color: var(--nav-text-color);
}

.nav-theme-dark .logo-text::after {
    background: linear-gradient(90deg, var(--nav-text-color), transparent);
}

.header-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 100%;
    margin: 0 auto;
    position: relative;
}

/* Logo样式 */
.header-logo {
    flex: 0 0 auto;
    height: 85px;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1002;
}

.logo-link {
    display: flex;
    align-items: center;
    height: 100%;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    border-radius: 5px;
}

.logo-img {
    height: 85px;
    width: auto;
    max-height: 85px;
    object-fit: contain;
    transition: all var(--transition-normal) var(--ease-out);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

/* 深色主题下的logo图片调整 */
.nav-theme-dark .logo-img {
    filter: drop-shadow(0 2px 4px rgba(255, 255, 255, 0.2));
}

.logo-link:hover .logo-img {
    transform: scale(1.05) rotate(2deg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

/* 深色主题下的logo悬停效果 */
.nav-theme-dark .logo-link:hover .logo-img {
    filter: drop-shadow(0 4px 8px rgba(255, 255, 255, 0.3));
}

.logo-text {
    font-size: 28px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    position: relative;
    padding: 5px 10px;
}

.logo-text::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 10px;
    right: 10px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform var(--transition-normal) var(--ease-out);
}

.logo-link:hover .logo-text::after {
    transform: scaleX(1);
}

/* 移动端菜单按钮样式 */
.mobile-menu-btn {
    display: none;
    position: relative;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-left: auto;
    margin-right: 15px;
    z-index: 1002;
}

.menu-icon {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
}

.menu-line {
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--nav-text-color);
    border-radius: 2px;
    transition: all var(--transition-normal) var(--ease-out);
}

.line-1 {
    top: 10px;
    transform-origin: left center;
}

.line-2 {
    top: 50%;
    transform: translateY(-50%);
    opacity: 1;
}

.line-3 {
    bottom: 10px;
    transform-origin: left center;
}

.mobile-menu-btn.active .line-1 {
    transform: rotate(45deg) translate(2px, -2px);
    background-color: var(--nav-hover-color);
}

.mobile-menu-btn.active .line-2 {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-btn.active .line-3 {
    transform: rotate(-45deg) translate(2px, 2px);
    background-color: var(--nav-hover-color);
}

.mobile-menu-btn:hover .menu-line {
    background-color: var(--nav-hover-color);
}

/* 移动端遮罩层 */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-overlay);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition-normal) ease;
}

.mobile-overlay.active {
    display: block;
    opacity: 1;
}

/* 导航栏样式 */
.header-nav {
    flex: 1 1 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 20px;
}

.nav-list {
    display: flex;
    list-style: none;
    height: 100%;
    align-items: center;
    gap: 2px;
    position: relative;
}

.nav-item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0 20px;
    height: 100%;
    text-decoration: none;
    color: var(--nav-text-color);
    font-weight: 500;
    transition: all var(--transition-fast) ease;
    position: relative;
    white-space: nowrap;
    background: transparent;
    border-radius: 5px;
    overflow: hidden;
}

/* 根据屏幕尺寸设置不同的字体大小 */
.nav-text {
    position: relative;
    z-index: 2;
    transition: all var(--transition-normal) ease;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-normal) var(--ease-out);
    z-index: 1;
}

/* 深色主题下的导航链接效果 */
.nav-theme-dark .nav-link::before {
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
}

.nav-link:hover {
    color: var(--nav-hover-color);
}

.nav-link:hover::before {
    width: 200%;
    height: 200%;
}

.nav-link .dropdown-arrow {
    margin-left: 8px;
    font-size: 12px;
    transition: all var(--transition-normal) var(--ease-out);
    color: var(--text-light);
}

/* 深色主题下的下拉箭头颜色 */
.nav-theme-dark .nav-link .dropdown-arrow {
    color: rgba(255, 255, 255, 0.7);
}

.dropdown-indicator {
    position: absolute;
    bottom: -8px;
    left: 50%;
    width: 6px;
    height: 6px;
    background-color: var(--primary-color);
    border-radius: 50%;
    transform: translateX(-50%) scale(0);
    transition: transform var(--transition-normal) var(--ease-out);
    z-index: 3;
}

/* 深色主题下的指示点 */
.nav-theme-dark .dropdown-indicator {
    background-color: var(--nav-text-color);
}

.nav-item.active .nav-link {
    color: var(--nav-hover-color);
}

.nav-item.active .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    border-radius: 2px;
    animation: slideIn 0.4s var(--ease-out) forwards;
    box-shadow: 0 0 10px var(--primary-glow);
    z-index: 2;
}

/* 深色主题下的激活状态 */
.nav-theme-dark .nav-item.active .nav-link::after {
    background: linear-gradient(90deg, var(--nav-text-color), rgba(255, 255, 255, 0.7));
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

@keyframes slideIn {
    from {
        transform: scaleX(0);
        opacity: 0;
    }

    to {
        transform: scaleX(1);
        opacity: 1;
    }
}

/* 下拉菜单样式 - 彻底修复版本 */
.dropdown-menu {
    position: absolute !important;
    top: calc(100% - 0px) !important;
    left: 50% !important;
    min-width: 220px !important;
    background-color: var(--bg-glass) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    box-shadow: var(--shadow-medium), var(--shadow-glow) !important;
    border-radius: 12px !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translate(-50%, 10px) scale(0.95) !important;
    transition: all var(--transition-normal) var(--ease-out) !important;
    z-index: 9999 !important;
    /* 极高的z-index */
    overflow: hidden !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    pointer-events: none !important;

    /* 确保不会被覆盖 */
    display: block !important;
}

/* 深色主题下的下拉菜单 - 修复对比度问题 */
.nav-theme-dark .dropdown-menu {
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    background-color: rgba(30, 60, 200, 0.95) !important;
}

/* 关键修复：使用更强力的选择器 */
.nav-item.has-dropdown:hover .dropdown-menu,
.nav-item.has-dropdown .dropdown-menu:hover,
.nav-item.has-dropdown .nav-link:hover+.dropdown-menu,
.nav-item.has-dropdown.active .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translate(-50%, 0) scale(1) !important;
    pointer-events: auto !important;
}

/* 确保下拉箭头在悬停时旋转 */
.nav-item.has-dropdown:hover .dropdown-arrow,
.nav-item.has-dropdown .nav-link:hover~.dropdown-arrow,
.nav-item.has-dropdown.active .dropdown-arrow {
    transform: rotate(180deg) !important;
    color: var(--primary-color) !important;
}

/* 深色主题下的下拉箭头悬停颜色 */
.nav-theme-dark .nav-item.has-dropdown:hover .dropdown-arrow,
.nav-theme-dark .nav-item.has-dropdown .nav-link:hover~.dropdown-arrow,
.nav-theme-dark .nav-item.has-dropdown.active .dropdown-arrow {
    color: var(--nav-text-color) !important;
}

/* 确保指示点在悬停时显示 */
.nav-item.has-dropdown:hover .dropdown-indicator,
.nav-item.has-dropdown .nav-link:hover~.dropdown-indicator,
.nav-item.has-dropdown.active .dropdown-indicator {
    transform: translateX(-50%) scale(1) !important;
}

.dropdown-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
    z-index: -1;
}

/* 深色主题下的下拉菜单背景 - 修复：使用深色背景确保文字可见 */
.nav-theme-dark .dropdown-backdrop {
    background: linear-gradient(135deg, rgba(40, 80, 220, 0.95), rgba(30, 70, 210, 0.85)) !important;
}

.dropdown-list {
    list-style: none;
    padding: 10px 0;
    position: relative;
}

.dropdown-item {
    position: relative;
    overflow: hidden;
}

.dropdown-item:not(:last-child)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(66, 113, 235, 0.1), transparent);
}

/* 深色主题下的分隔线 - 修复：使用浅色确保可见 */
.nav-theme-dark .dropdown-item:not(:last-child)::after {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent) !important;
}

.dropdown-link {
    display: flex;
    align-items: center;
    padding: 15px 25px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: all var(--transition-fast) ease;
    position: relative;
    overflow: hidden;
}

/* 深色主题下的下拉链接文字颜色 - 修复：使用白色确保可见 */
.nav-theme-dark .dropdown-link {
    color: rgba(255, 255, 255, 0.9) !important;
}

.dropdown-icon {
    margin-right: 12px;
    color: var(--primary-color);
    font-size: 12px;
    transform: translateX(-5px);
    transition: all var(--transition-normal) var(--ease-out);
    opacity: 0;
}

/* 深色主题下的下拉图标颜色 - 修复：使用白色 */
.nav-theme-dark .dropdown-icon {
    color: rgba(66, 113, 235, 0.9) !important;
}

.dropdown-text {
    position: relative;
    z-index: 2;
    transition: all var(--transition-normal) ease;
}

.dropdown-hover-effect {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    transition: left var(--transition-slow) ease;
    z-index: 1;
}

/* 深色主题下的悬停效果 - 修复：使用深色背景 */
.nav-theme-dark .dropdown-hover-effect {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

.dropdown-link:hover {
    color: var(--primary-color);
    padding-left: 30px;
    background: linear-gradient(90deg, transparent, var(--primary-light));
}

/* 深色主题下的下拉链接悬停效果 - 修复：使用深蓝色背景和白色文字 */
.nav-theme-dark .dropdown-link:hover {
    color: #4271EB !important;
    background: linear-gradient(90deg, transparent, rgba(66, 113, 235, 0.6)) !important;
}

.dropdown-link:hover .dropdown-icon {
    transform: translateX(0);
    opacity: 1;
}

.dropdown-link:hover .dropdown-hover-effect {
    left: 100%;
}

.dropdown-link:hover .dropdown-text {
    transform: translateX(5px);
}

/* 登录按钮样式 */
.header-login {
    flex: 0 0 auto;
    position: relative;
    z-index: 1002;
}

.login-btn {
    display: flex;
    align-items: center;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: white;
    border: none;
    border-radius: 30px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal) var(--ease-out);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
    z-index: 1;
    text-decoration: none;
}

.login-hover-effect {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-slow) ease;
}

.login-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-glow);
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
}

.login-btn:hover .login-hover-effect {
    left: 100%;
}

.login-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.login-icon {
    margin-right: 8px;
    font-size: 16px;
    transition: transform var(--transition-normal) var(--ease-out);
}

.login-btn:hover .login-icon {
    transform: rotate(15deg);
}

/* Swiper轮播图样式 */
.banner-section {
    margin-top: 85px;
    /* 为固定导航栏留出空间 */
    position: relative;
    width: 100%;
    overflow: hidden;
}

.banner-swiper {
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: relative;
    height: 0;
    padding-bottom: 56.25%;
    /* 16:9 比例 (1080/1920 = 0.5625) */
    overflow: hidden;
}

.banner-link {
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    transition: transform var(--transition-slow) ease;
    filter: brightness(0.95);
}

.banner-slide:hover .banner-img {
    transform: scale(1.05);
    filter: brightness(1);
}

/* Swiper分页器自定义样式 */
.swiper-pagination {
    position: absolute;
    bottom: 30px !important;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    z-index: 10;
}

.swiper-pagination-bullet {
    width: 14px;
    height: 14px;
    background-color: var(--bg-white);
    opacity: 0.8;
    margin: 0 8px !important;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal) var(--ease-out);
    position: relative;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.swiper-pagination-bullet::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 2px solid transparent;
    border-radius: 50%;
    transition: all var(--transition-normal) var(--ease-out);
}

.swiper-pagination-bullet::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-normal) var(--ease-out);
    z-index: -1;
}

.swiper-pagination-bullet:hover {
    opacity: 1;
    transform: scale(1.3);
    background-color: var(--primary-color);
}

.swiper-pagination-bullet:hover::before {
    border-color: rgba(255, 255, 255, 0.5);
}

.swiper-pagination-bullet:hover::after {
    width: 40px;
    height: 40px;
}

.swiper-pagination-bullet-active {
    background-color: var(--primary-color) !important;
    opacity: 1 !important;
    transform: scale(1.3);
    box-shadow: 0 0 15px var(--primary-glow);
}

.swiper-pagination-bullet-active::before {
    border-color: rgba(66, 113, 235, 0.5);
}

.swiper-pagination-bullet-active::after {
    width: 50px;
    height: 50px;
}

/* ==================== 响应式设计 - 多屏幕适配 ==================== */

/* 2K屏幕 (2560x1440及以上) */
@media (min-width: 2560px) {
    .header-container {
        padding: 0 var(--screen-padding-2k);
    }

    .nav-link {
        font-size: var(--nav-font-size-2k);
        padding: 0 22px;
    }

    .login-btn {
        font-size: var(--nav-font-size-2k);
        padding: 14px 32px;
    }
}

/* 2559 - 2301 屏幕 */
@media (max-width: 2559px) and (min-width: 2301px) {
    .header-container {
        padding: 0 var(--screen-padding-2560);
    }
    .nav-link {
        font-size: var(--nav-font-size-2100);
        padding: 0 20px;
    }
    .header-logo img{
        height: 75px;
    }
}

/* 2300 - 2100 屏幕 */
@media (max-width: 2300px) and (min-width: 2100px) {
    .header-container {
        padding: 0 var(--screen-padding-2100);
    }

    .nav-link {
        font-size: var(--nav-font-size-1920);
        padding: 0 20px;
    }
}

/* 1921 屏幕 -  2099 屏幕 */
@media (max-width: 2099px) and (min-width: 1921px) {
    .header-container {
        padding: 0 var(--screen-padding-1680);
    }

    .nav-link {
        font-size: var(--nav-font-size-1920);
        padding: 0 20px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1920);
        padding: 12px 28px;
    }

    .header-logo img{
        height: 75px;
    }
}

/* 1680x1050 屏幕 */
@media (max-width: 1920px) and (min-width: 1680px) {
    .header-container {
        padding: 0 var(--screen-padding-1680);
    }

    .nav-link {
        font-size: var(--nav-font-size-1680);
        padding: 0 18px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1680);
        padding: 11px 26px;
    }

    .header-logo img{
        height: 70px;
    }
}

/* 1600x1024 屏幕 */
@media (max-width: 1679px) and (min-width: 1600px) {
    .header-container {
        padding: 0 var(--screen-padding-1600);
    }

    .nav-link {
        font-size: var(--nav-font-size-1600);
        padding: 0 16px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1600);
        padding: 10px 24px;
    }

    .header-logo img{
        height: 60px;
    }
}

/* 1440x900 屏幕 */
@media (max-width: 1599px) and (min-width: 1440px) {
    .header-container {
        padding: 0 var(--screen-padding-1440);
    }

    .nav-link {
        font-size: var(--nav-font-size-1440);
        padding: 0 14px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1440);
        padding: 10px 22px;
    }

    .header-logo img{
        height: 50px;
    }
}

/* 1366x768 屏幕 */
@media (max-width: 1439px) and (min-width: 1366px) {
    .header-container {
        padding: 0 var(--screen-padding-1366);
    }

    .nav-link {
        font-size: var(--nav-font-size-1366);
        padding: 0 12px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1366);
        padding: 9px 20px;
    }

    .header-logo img{
        height: 45px;
    }
}

/* 1280x800 屏幕 */
@media (max-width: 1365px) and (min-width: 1280px) {
    .header-container {
        padding: 0 var(--screen-padding-1366);
    }

    .header-nav {
        margin: 0 15px;
    }

    .nav-link {
        font-size: var(--nav-font-size-1280);
        padding: 0 10px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1280);
        padding: 8px 18px;
    }

    .header-logo img{
        height: 40px;
    }
}

/* 1024x768 屏幕 */
@media (max-width: 1279px) and (min-width: 1024px) {
    .header-container {
        padding: 0 var(--screen-padding-1024);
    }

    .main-header {
        height: var(--main-header-1024);
    }

    .header-logo,
    .logo-img {
        height: var(--main-header-1024);
    }

    .banner-section {
        margin-top: var(--main-header-1024);
    }

    .nav-link {
        font-size: var(--nav-font-size-1024);
        padding: 0 8px;
    }

    .dropdown-menu {
        min-width: 200px;
        border-radius: 10px;
    }

    .dropdown-link {
        padding: 12px 20px;
        font-size: 13px;
    }

    .login-btn {
        font-size: var(--nav-font-size-1024);
        padding: 8px 16px;
    }

    .header-logo img{
        height: 40px;
    }
}

/* 平板和移动端样式 */
@media (max-width: 1023px) {
    .header-container {
        padding: 0 var(--screen-padding-mobile);
    }

    .main-header {
        height: var(--main-header-768);
    }

    .header-logo,
    .logo-img {
        height: var(--main-header-768);
    }

    .header-logo img{
        height: 40px;
    }

    .banner-section {
        margin-top: var(--main-header-768);
    }

    /* 显示移动端菜单按钮 */
    .mobile-menu-btn {
        display: block;
    }

    /* 隐藏PC端导航栏 */
    .header-nav {
        position: fixed;
        top: var(--main-header-768);
        left: 0;
        right: 0;
        height: calc(100vh - var(--main-header-768));
        background-color: var(--nav-bg-color);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        margin: 0;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal) var(--ease-out);
        overflow-y: auto;
        z-index: 1001;
        padding: 20px 0;
        box-shadow: var(--shadow-medium);
    }

    /* 深色主题下的移动端导航栏 */
    .nav-theme-dark .header-nav {
        background-color: rgba(66, 113, 235, 0.98);
    }

    .header-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        height: auto;
        align-items: stretch;
        gap: 0;
    }

    .nav-item {
        height: auto;
        width: 100%;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    /* 深色主题下的移动端导航项分隔线 */
    .nav-theme-dark .nav-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-item:last-child {
        border-bottom: none;
    }

    .nav-link {
        height: var(--main-header-768);
        padding: 0 25px;
        justify-content: space-between;
        font-size: var(--font-size-mobile);
        border-radius: 0;
        position: relative;
        display: flex;
        align-items: center;
    }

    .nav-link::before {
        display: none;
    }

    .nav-item.active .nav-link::after {
        left: 0;
        right: 0;
        height: 2px;
    }

    /* 移动端下拉菜单样式 */
    .dropdown-menu {
        position: static !important;
        width: 100% !important;
        min-width: auto !important;
        background-color: rgba(255, 255, 255, 0.95) !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        opacity: 1 !important;
        /* 修复：确保移动端默认可见 */
        visibility: visible !important;
        /* 修复：确保移动端默认可见 */
        transform: none !important;
        transition: max-height 0.3s ease !important;
        max-height: 0 !important;
        overflow: hidden !important;
        pointer-events: auto !important;
        border: none !important;
        margin-top: 0 !important;
        padding: 0 !important;
        z-index: 1 !important;
        display: block !important;
        backdrop-filter: none !important;
    }

    /* 深色主题下的移动端下拉菜单 */
    .nav-theme-dark .dropdown-menu {
        background-color: rgba(30, 60, 200, 0.9) !important;
        border: none !important;
    }

    /* 关键修复：确保移动端active状态下拉菜单可见 */
    .nav-item.has-dropdown.active {
        text-indent: 0px;
        position: relative !important;
    }

    .nav-item.has-dropdown.active .dropdown-menu {
        max-height: 500px !important;
        transition: max-height var(--transition-slow) ease !important;
        overflow-y: auto !important;
        width: 100% !important;
        position: absolute !important;
        z-index: 100000 !important;
    }

    .dropdown-backdrop {
        display: none !important;
    }

    .dropdown-list {
        padding: 10px 0 !important;
        list-style: none !important;
    }

    .dropdown-item {
        position: relative !important;
        overflow: hidden !important;
    }

    .dropdown-item:not(:last-child)::after {
        left: 25px !important;
        right: 25px !important;
    }

    .dropdown-link {
        padding: 12px 25px !important;
        font-size: var(--font-size-mobile-small) !important;
        display: flex !important;
        align-items: center !important;
        color: var(--text-color) !important;
        /* 修复：确保文字颜色可见 */
        text-decoration: none !important;
        width: 100% !important;
    }

    /* 移动端深色主题下拉链接文字颜色 */
    .nav-theme-dark .dropdown-link {
        color: rgba(255, 255, 255, 0.9) !important;
    }

    .dropdown-link:hover {
        padding-left: 30px !important;
    }

    /* 移动端深色主题下拉链接悬停效果 */
    .nav-theme-dark .dropdown-link:hover {
        color: #ffffff !important;
        background: rgba(66, 113, 235, 0.7) !important;
    }

    .dropdown-icon {
        opacity: 1 !important;
        /* 修复：确保图标可见 */
        transform: translateX(0) !important;
        margin-right: 10px !important;
        font-size: 12px !important;
        display: inline-flex !important;
        align-items: center !important;
        color: var(--primary-color) !important;
        /* 修复：确保图标颜色可见 */
    }

    .dropdown-text {
        flex: 1 !important;
        white-space: normal !important;
        word-break: break-word !important;
        overflow-wrap: break-word !important;
        display: block !important;
        color: inherit !important;
        /* 修复：继承文字颜色 */
    }

    /* 移动端下拉箭头动画 */
    .nav-item.has-dropdown.active .dropdown-arrow {
        transform: rotate(180deg) !important;
        color: var(--nav-hover-color) !important;
        transition: transform var(--transition-normal) var(--ease-out) !important;
    }

    /* 移动端激活的下拉菜单 */
    .nav-item.has-dropdown.active .dropdown-menu {
        max-height: 500px !important;
        transition: max-height var(--transition-slow) ease !important;
        overflow-y: auto !important;
        opacity: 1 !important;
        visibility: visible !important;
    }

    /* 确保移动端下拉箭头可见 */
    .nav-item.has-dropdown .dropdown-arrow {
        transition: transform var(--transition-normal) var(--ease-out) !important;
        margin-left: 8px !important;
        font-size: 12px !important;
    }

    /* 移动端深色主题下的下拉箭头 */
    .nav-theme-dark .nav-item.has-dropdown .dropdown-arrow {
        color: rgba(255, 255, 255, 0.7) !important;
    }

    .nav-theme-dark .nav-item.has-dropdown.active .dropdown-arrow {
        color: var(--nav-hover-color-dark) !important;
    }

    /* 登录按钮调整 */
    .header-login {
        margin-left: 0;
    }

    .login-btn {
        padding: 8px 20px;
        font-size: var(--font-size-mobile-small);
    }

    .login-text {
        display: inline-block;
    }

    .login-icon {
        margin-right: 8px;
    }
}

/* 767px以下手机设备 */
@media (max-width: 767px) {
    .main-header {
        height: var(--main-header-480);
    }

    .header-logo,
    .logo-img {
        height: var(--main-header-480);
    }

    .banner-section {
        margin-top: var(--main-header-480);
    }

    .header-nav {
        top: var(--main-header-480);
        height: calc(100vh - var(--main-header-480));
    }

    .mobile-menu-btn {
        width: 35px;
        height: 35px;
    }

    .nav-link {
        height: var(--main-header-480);
        padding: 0 20px;
        font-size: 15px;
    }

    .banner-slide {
        padding-bottom: 75%;
        /* 手机端使用更方的比例 */
    }

    .swiper-pagination {
        bottom: 15px !important;
    }

    .swiper-pagination-bullet {
        width: 10px;
        height: 10px;
        margin: 0 5px !important;
    }

    .dropdown-link {
        padding: 10px 20px !important;
        font-size: 14px;
    }

    .dropdown-link:hover {
        padding-left: 25px !important;
    }

    .login-btn {
        padding: 7px 15px;
        font-size: 14px;
    }
}

/* 480px以下小手机设备 */
@media (max-width: 480px) {
    .main-header {
        height: var(--main-header-lt-480);
    }

    .header-logo,
    .logo-img {
        height: var(--main-header-lt-480);
    }

    .banner-section {
        margin-top: var(--main-header-lt-480);
    }

    .header-nav {
        top: var(--main-header-lt-480);
        height: calc(100vh - var(--main-header-lt-480));
    }

    .nav-link {
        height: var(--main-header-lt-480);
        padding: 0 15px;
        font-size: 14px;
    }

    .dropdown-link {
        padding: 8px 15px !important;
        font-size: 13px;
    }

    .dropdown-link:hover {
        padding-left: 20px !important;
    }

    .login-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .login-text {
        font-size: 13px;
    }
}