/* 公共样式 - 导航栏和页脚 */

a{
	text-decoration: none;
}
/* ==================== 导航栏样式 ==================== */

.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 50px;
    transition: all 0.3s ease;
}

.nav-header.nav-transparent {
    background-color: transparent;
}

.nav-header.nav-dark {
    background-color: #1a1a1a;
}

.nav-header.nav-light {
    background-color: #fff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logo img {
    height: 45px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
    margin: 0;
    padding: 0;
    justify-content: flex-end;
    flex: 1;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 15px 25px;
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    background-color: transparent;
    position: relative;
    letter-spacing: 1px;
}

.nav-light .nav-link {
    color: #1a1a1a;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 1);
    color: #333;
}

.nav-light .nav-link:hover {
    background-color: #1e5799;
    color: #fff;
}

.nav-link.active {
    background-color: #1e5799;
    color: #fff;
}


/* 下拉菜单 */

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    min-width: 220px;
    padding: 15px 0;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: block;
    padding: 14px 25px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.dropdown-item:hover {
    background: #f5f7fa;
    color: #1e5799;
    padding-left: 30px;
}

.dropdown-item.active {
    color: #1e5799;
    font-weight: 500;
}


/* ==================== 页脚样式 ==================== */

.site-footer {
    background: #0a0a0a;
    padding: 0;
    position: relative;
    overflow: hidden;
}

.footer-main {
    max-width: 1600px;
    margin: 0 auto;
    padding: 80px 80px 60px;
    display: flex;
    justify-content: space-between;
    gap: 100px;
}


/* 左侧导航区域 */

.footer-nav-area {
    flex: 1;
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.footer-nav-column {
    min-width: 120px;
}

.footer-nav-title {
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav-item {
    margin-bottom: 16px;
}

.footer-nav-link {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-nav-link:hover {
    color: #fff;
    transform: translateX(5px);
}


/* 右侧品牌区域 */

.footer-brand-area {
    text-align: right;
    min-width: 200px;
}

.footer-brand-logo {
    height: 50px;
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.footer-brand-slogan {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 2px;
}


/* 分割线 */

.footer-divider {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 80px;
}

.footer-divider-line {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}


/* 底部版权区域 */

.footer-bottom {
    max-width: 1600px;
    margin: 0 auto;
    padding: 30px 80px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 1px;
}


/* 社交媒体图标 */

.footer-social {
    display: flex;
    gap: 20px;
}

.social-item {
    position: relative;
}

.social-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: all 0.3s ease;
    cursor: pointer;
}

.social-icon svg {
    width: 18px;
    height: 18px;
    fill: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.social-icon img {
    width: 18px;
    height: 18px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.social-icon:hover {
    border-color: #1e5799;
    background: #1e5799;
}

.social-icon:hover svg {
    fill: #fff;
}


/* 二维码弹出 */

.social-qrcode {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    text-align: center;
}

.social-qrcode::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid #fff;
}

.social-item:hover .social-qrcode {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.social-qrcode img {
    width: 120px;
    height: 120px;
    display: block;
}

.social-qrcode-text {
    font-size: 12px;
    color: #666;
    margin-top: 10px;
    white-space: nowrap;
}


/* 汉堡菜单按钮 */

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #fff;
    transition: all 0.3s ease;
}

.nav-light .nav-toggle span {
    background-color: #1a1a1a;
}


/* 汉堡菜单打开状态 */

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}


/* 移动端菜单遮罩 */

.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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


/* 响应式设计 */

@media (max-width: 1200px) {
    .footer-main {
        padding: 60px 50px 40px;
        gap: 60px;
    }
    .footer-nav-area {
        gap: 50px;
    }
    .footer-divider,
    .footer-bottom {
        padding-left: 50px;
        padding-right: 50px;
    }
}


/* 平板适配 */

@media (max-width: 1024px) {
    .nav-header {
        padding: 15px 30px;
    }
    .nav-link {
        padding: 12px 18px;
        font-size: 14px;
    }
    .dropdown-menu {
        min-width: 180px;
    }
}

/* 大屏手机/小平板适配 */
@media (max-width: 992px) {
    .nav-header {
        padding: 15px 20px;
        z-index: 1002;
    }
    /* 显示汉堡菜单按钮 */
    .nav-toggle {
        display: flex;
        z-index: 1003;
    }
    /* 移动端菜单样式 - 全屏宽度 */
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: #1a1a1a;
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 0;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
        z-index: 1001;
    }
    .nav-menu.active {
        transform: translateX(0);
    }
    .nav-item {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .nav-link {
        padding: 18px 0;
        color: #fff;
        font-size: 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .nav-link:hover {
        background-color: transparent;
        color: #1e5799;
    }
    /* 移动端下拉菜单 */
    .nav-dropdown .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        box-shadow: none;
        padding: 0;
        margin: 10px 0 15px 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    .nav-dropdown.open .dropdown-menu {
        max-height: 300px;
        padding: 10px 0;
    }
    .dropdown-item {
        padding: 14px 20px;
        color: rgba(255, 255, 255, 0.7);
        font-size: 14px;
        border-radius: 4px;
        margin: 2px 10px;
    }
    .dropdown-item:hover {
        background: rgba(30, 87, 153, 0.2);
        color: #1e5799;
        padding-left: 20px;
    }
    /* 下拉箭头指示 */
    .nav-dropdown>.nav-link::after {
        content: '';
        position: static;
        border: 6px solid transparent;
        border-top-color: #fff;
        transition: transform 0.3s ease;
        margin-left: 10px;
    }
    .nav-dropdown.open>.nav-link::after {
        transform: rotate(180deg);
    }
}

/* 中等手机适配 */
@media (max-width: 768px) {
    .nav-header {
        padding: 15px 20px;
    }
    .nav-menu.active {
        transform: translateX(0);
    }
    .nav-item {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .nav-link {
        padding: 18px 0;
        color: #fff;
        font-size: 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .nav-link:hover {
        background-color: transparent;
        color: #1e5799;
    }
    /* 移动端下拉菜单 */
    .nav-dropdown .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        box-shadow: none;
        padding: 0;
        margin: 10px 0 15px 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    .nav-dropdown.open .dropdown-menu {
        max-height: 300px;
        padding: 10px 0;
    }
    .dropdown-item {
        padding: 14px 20px;
        color: rgba(255, 255, 255, 0.7);
        font-size: 14px;
        border-radius: 4px;
        margin: 2px 10px;
    }
    .dropdown-item:hover {
        background: rgba(30, 87, 153, 0.2);
        color: #1e5799;
        padding-left: 20px;
    }
    /* 下拉箭头指示 */
    .nav-dropdown>.nav-link::after {
        content: '';
        position: static;
        border: 6px solid transparent;
        border-top-color: #fff;
        transition: transform 0.3s ease;
        margin-left: 10px;
    }
    .nav-dropdown.open>.nav-link::after {
        transform: rotate(180deg);
    }
    .footer-main {
        flex-direction: column;
        padding: 50px 20px 30px;
        gap: 40px;
    }
    .footer-nav-area {
        flex-wrap: wrap;
        gap: 30px;
    }
    .footer-brand-area {
        text-align: left;
    }
    .footer-divider,
    .footer-bottom {
        padding-left: 20px;
        padding-right: 20px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}


/* 小屏手机适配 */

@media (max-width: 480px) {
    .nav-menu {
        width: 100%;
    }
    .footer-nav-column {
        min-width: 100%;
    }
}