/* =========================
   基础变量（不影响旧浏览器）
========================= */
:root {
    --main-blue: #1B498C;
    --main-blue-hover: #153A6D;
    --main-red: #D54031;
    --main-red-hover: #B33628;
    --text-gray: #535a5c;
}

html,body,main {
    scroll-behavior: smooth !important;
    scroll-padding-top: 175px !important;
}

@media (max-width: 1000px) {
    html,body,main {
        scroll-padding-top: 70px !important;
    }
}

/* =========================
   基础布局控制
========================= */
body {
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1800px;
    margin: 0 auto;
    padding: 0 15px;
    box-sizing: border-box;
}

@media (max-width: 1000px) {
    html, body,
    .container,
    .row,
    .col-6,
    .col-3 {
        overflow-x: hidden;
    }

    .container {
        max-width: 100%;
    }
}

/* =========================
   导航显示控制
========================= */
.mobile-nav { display: none; }
.desktop-nav { display: block; }

@media (max-width: 1000px) {
    .desktop-nav { display: none; }
    .mobile-nav { display: block; }
}

/* =========================
   TopLogo
========================= */
.toplogo {
    height: 115px !important;
    background-color: #fff !important;
    display: flex;
    align-items: center;
}

.toplogo > .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 热线 */
.toplogo .connectus,
.toplogo .connectus * {
    display: flex;
    align-items: center;
    color: var(--text-gray) !important;
    text-decoration: none !important;
}

.toplogo .connectus {
    gap: 10px;
}

.toplogo .connectus i {
    font-size: 40px;
}

.toplogo .connectus .phone {
    flex-direction: column;
    align-items: flex-start;
}

.toplogo .connectus .phone a {
    font-size: 18px;
}

.toplogo .logo {
    max-height: 60px;
}

/* =========================
   TopNav（桌面导航）
========================= */
.topnav {
    height: 60px !important;
    background: var(--main-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0,0,0,.2);
}

.topnav .container {
    padding: 0 !important;
}

.navbar.navbar-expand-lg {
    padding: 0 !important;
    margin: 0 !important;
    background-color: var(--main-blue) !important;
    border: none !important;
    box-shadow: none !important;
    color: #fff;
}

.navbar-nav {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.navbar-nav > .nav-item > .nav-link {
    padding: 0 40px;
    line-height: 60px;
    color: #fff !important;
    font-size: 21px;
}

.navbar-nav > .nav-item.active > .nav-link,
.navbar-nav > .nav-item > .nav-link:hover {
    background: var(--main-red) !important;
    font-size: 21px;
}

.nav-item.dropdown.active:hover>.nav-link {
    background: var(--main-red-hover) !important;
    font-size: 21px;
}

/* =========================
   Dropdown
========================= */
.dropdown { position: relative;}

.dropdown-menu {
    position: absolute;
    text-align: center;
    top: 100%;
    left: 0;
    display: none;
    min-width: 100px;
    width: 100%;
    background-color: var(--main-blue);
    border: 1px solid #eee;
    box-shadow: 0 2px 5px rgba(0,0,0,.1);
    font-size: 16px !important;
}

.dropdown.show .dropdown-menu { display: block; }

.dropdown-item {
    padding: 8px 15px;
    color: #fff !important;
}

.dropdown-item:hover {
    background: var(--main-red) !important;
}

.dropdown-item.active, .dropdown-item:active {
    background: var(--main-red) !important;
}

.dropdown-item.active:hover {
    background: var(--main-red-hover) !important;
}

/* =========================
   Footer
========================= */
#footer {
    background: #132345;
    color: #fff;
    padding: 40px 0;
}

.footer-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 80px;
    display: flex;
    justify-content: space-evenly;
    align-items: flex-start;
}

.footer-inner h5 {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 15px;
}

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

.footer-inner ul li {
    margin-bottom: 8px;
}

.footer-inner ul li a {
    color: #fff;
    font-size: 14px;
    text-decoration: none;
}

.footer-inner ul li a:hover {
    text-decoration: underline;
}

.footer-inner .col-md-8 {
    display: flex;
    justify-content: center;
}

.footer-inner .col-md-4 {
    display: flex;
    padding-left: 20px;
    flex-direction: column;
    align-items: flex-start;
}

/* Footer 响应式 */
@media (max-width: 768px) {
    .footer-inner {
        padding: 0;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-inner .col-md-8,
    .footer-inner .col-md-4 {
        width: 100%;
        align-items: center;
    }

    .footer-inner .col-md-8 > .row {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }

    .footer-inner .col-md-8 > .row > div {
        width: 50%;
        min-height: 120px;
        padding: 0 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-inner .col-md-8 h5 {
        height: 20px;
        line-height: 20px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

/* =========================
   二维码
========================= */
.qrcode-container {
    display: flex;
    justify-content: space-evenly;
    gap: 20px;
    flex-wrap: wrap;
}

.qrcode-item {
    min-width: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qrcode-item img {
    width: 100px;
    height: 100px;
    background: #fff;
    padding: 5px;
    border-radius: 4px;
}

/* =========================
   版权
========================= */
.copyright {
    background: #040a1a;
    padding: 15px 0;
}

.copyright p {
    font-size: 12px;
    text-align: center;
    margin: 0;
}

/* =========================
   移动端导航
========================= */
.mobile-nav {
    background: #fff;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1030;
    box-shadow: 0 2px 5px rgba(0,0,0,.1);
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 15px;
}

.mobile-nav-menu > li > a {
    padding: 12px 15px;
    font-size: 14px;
    display: block;
}

/* 移动端导航样式 */
.mobile-nav {
    background-color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
}

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

.mobile-nav-toggle {
    font-size: 24px;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    padding: 10px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.mobile-nav-toggle:hover {
    background-color: #f5f5f5;
}

/* 确保按钮内的图标居中 */
.mobile-nav-toggle i {
    margin: 0;
}

/* 移动端导航菜单样式 */
.mobile-nav-content {
    display: none;
    background-color: #fff;
    border-top: 1px solid #eee;
}

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

.mobile-nav-menu>li {
    border-bottom: 1px solid #eee;
    position: relative;
}

.mobile-nav-menu>li>a {
    display: block;
    padding: 15px;
    color: #333;
    text-decoration: none;
    font-size: 16px;
    position: relative;
}

.mobile-nav-menu>li.active>a {
    color: #fff;
    background: #D54031;
    font-weight: bold;
}

.mobile-nav-menu>li.active>a:hover {
    color: #fff;
    background: #D54031;
}

.mobile-nav-submenu {
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: #f8f8f8;
}

.mobile-nav-submenu li {
    border-bottom: 1px solid #eee;
}

.mobile-nav-submenu li a {
    display: block;
    padding: 12px 20px 12px 40px;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.mobile-nav-submenu li a:hover {
    color: #fff;
    background: #D54031;
    padding-left: 45px;
}

.mobile-nav-submenu li.active a {
    color: #fff;
    background: #D54031;
    font-weight: bold;
}

.mobile-nav-submenu li.active a:hover {
    color: #fff;
    background: #D54031;
}

/* 子菜单切换按钮样式 */
.submenu-toggle {
    display: inline-block !important;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    color: #666;
    cursor: pointer;
}

/* 确保所有有子菜单的菜单项有足够的右侧padding */
.mobile-nav-menu>li:has(.mobile-nav-submenu)>a {
    padding-right: 40px;
}

/* 移动端导航内容区域最大高度和滚动 */
.mobile-nav-content {
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* 确保移动端导航打开时，只有导航内容可滚动 */
body.mobile-nav-open {
    overflow: hidden;
}

/* 移动端样式调整 */
@media (max-width: 1000px) {

    /* 隐藏桌面端导航 */
    .desktop-nav {
        display: none;
    }

    /* 显示移动端导航 */
    .mobile-nav {
        display: block;
    }

    /* 调整页面顶部padding，适配移动端导航高度 */
    .skin-white {
        padding-top: 70px !important;
    }

    /* 移动端二维码居中 */
    .qrcode-container {
        justify-content: center;
    }

    /* 联系信息移动端居中 */
    .contact-info {
        text-align: center;
    }

    /* 备案信息确保正常换行 */
    .copyright p {
        padding: 0 15px;
        line-height: 1.6;
        word-break: break-word;
        white-space: normal;
    }
}

/* 小屏幕移动端样式调整 */
@media (max-width: 768px) {
    /* 小屏幕下联系信息居中 */
    .contact-info {
        text-align: center;
    }
}

/* =========================
   公共工具类
========================= */
.wide-column { width: 25%; }

.fix-img-lock {
    width: 100%;
    height: 100%;
}

.fix-img-lock img {
    width: 100%;
    height: auto;
    object-fit: cover;
}