/* ---------- 通用容器 ---------- */
.container-custom {
    max-width: 1240px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* 导航栏容器：与 Default.aspx 一致的 1280px 宽度 */
.site-header .container-custom {
    max-width: 1280px;
}

/* =========================================================
   顶部导航栏
   ========================================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    display: flex;
    align-items: center;
    background: rgba(10, 36, 99, 0.85);
    backdrop-filter: blur(16px) saturate(1.4);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

    .site-header.scrolled {
        background: rgba(10, 36, 99, 0.96);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    }

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

.brand {
    display: flex;
    align-items: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

    .brand span {
        background: linear-gradient(to right, #fff 60%, #7abfff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

/* ---------- 桌面导航 ---------- */
.desktop-nav {
    display: flex;
    align-items: center;
    height: 100%;
}

    .desktop-nav .nav-item {
        position: relative;
        display: flex;
        align-items: center;
        height: 100%;
        padding: 0 14px;
    }

        .desktop-nav .nav-item > a {
            display: inline-flex;
            align-items: center;
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color 0.25s ease;
            cursor: pointer;
            white-space: nowrap;
            text-decoration: none;
        }

            .desktop-nav .nav-item > a::after {
                content: '';
                position: absolute;
                left: 0;
                right: 0;
                bottom: -6px;
                height: 2.5px;
                border-radius: 4px;
                background: linear-gradient(90deg, #3E92CC, #7abfff);
                transform: scaleX(0);
                transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
            }

            .desktop-nav .nav-item > a:hover,
            .desktop-nav .nav-item.open > a {
                color: #fff;
            }

                .desktop-nav .nav-item > a:hover::after,
                .desktop-nav .nav-item.open > a::after {
                    transform: scaleX(1);
                }

    .desktop-nav .arrow {
        font-size: 0.58rem;
        color: rgba(255, 255, 255, 0.5);
        margin-left: 6px;
        line-height: 1;
        transition: transform 0.3s ease, color 0.3s ease;
    }

    .desktop-nav .nav-item.open > a .arrow,
    .desktop-nav .nav-item:hover > a .arrow {
        transform: rotate(180deg);
        color: #7abfff;
    }

    /* =====================================================
   二级下拉菜单 —— 悬浮/点击一级菜单展开
   ===================================================== */
    .desktop-nav .nav-item > .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 50%;
        min-width: 200px;
        padding: 8px;
        background: rgba(255, 255, 255, 0.985);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-radius: 14px;
        border: 1px solid rgba(255, 255, 255, 0.5);
        box-shadow: 0 18px 46px rgba(10, 36, 99, 0.22);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateX(-50%) translateY(10px);
        /* 关闭延迟 0.2s，给鼠标留出缓冲时间 */
        transition: opacity 0.25s ease 0.2s, transform 0.25s ease 0.2s, visibility 0.25s ease 0.2s;
        z-index: 1200;
    }

        /* 一级与二级菜单之间的隐形缓冲带 */
        .desktop-nav .nav-item > .dropdown-menu::before {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            top: -12px;
            height: 12px;
        }

    .desktop-nav .nav-item:hover > .dropdown-menu,
    .desktop-nav .nav-item.open > .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(-50%) translateY(0);
        transition: opacity 0.25s ease 0s, transform 0.25s ease 0s, visibility 0.25s ease 0s;
    }

    /* ---------- 二级菜单项 ---------- */
    .desktop-nav .dropdown-item {
        position: relative;
    }

    .desktop-nav .dropdown-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        padding: 10px 14px;
        border-radius: 9px;
        color: #334155;
        font-size: 0.9rem;
        font-weight: 500;
        white-space: nowrap;
        transition: background 0.2s ease, color 0.2s ease;
        cursor: pointer;
        text-decoration: none;
    }

        .desktop-nav .dropdown-link:hover,
        .desktop-nav .dropdown-item.open > .dropdown-link,
        .desktop-nav .dropdown-item:hover > .dropdown-link {
            background: rgba(62, 146, 204, 0.1);
            color: #0A2463;
        }

    .desktop-nav .arrow-r {
        font-size: 0.72rem;
        color: #94a3b8;
        line-height: 1;
        transition: transform 0.3s ease, color 0.3s ease;
    }

    .desktop-nav .dropdown-link:hover .arrow-r,
    .desktop-nav .dropdown-item.open .arrow-r,
    .desktop-nav .dropdown-item:hover .arrow-r {
        color: #3E92CC;
        transform: translateX(3px);
    }

    /* =====================================================
   三级下拉菜单 —— 悬浮/点击二级菜单展开
   ===================================================== */
    .desktop-nav .dropdown-item > .dropdown-menu {
        position: absolute;
        top: -8px;
        left: 100%;
        min-width: 220px;
        padding: 8px;
        background: rgba(255, 255, 255, 0.985);
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
        border-radius: 14px;
        border: 1px solid rgba(255, 255, 255, 0.5);
        box-shadow: 0 18px 46px rgba(10, 36, 99, 0.22);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateX(10px);
        transition: opacity 0.25s ease 0.2s, transform 0.25s ease 0.2s, visibility 0.25s ease 0.2s;
        z-index: 1300;
    }

        /* 二级与三级之间的隐形桥梁 */
        .desktop-nav .dropdown-item > .dropdown-menu::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: -14px;
            width: 14px;
        }

    .desktop-nav .dropdown-item:hover > .dropdown-menu,
    .desktop-nav .dropdown-item.open > .dropdown-menu {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateX(0);
        transition: opacity 0.25s ease 0s, transform 0.25s ease 0s, visibility 0.25s ease 0s;
    }

    .desktop-nav .dropdown-item:hover,
    .desktop-nav .dropdown-item.open {
        z-index: 5;
    }

/* ---------- 咨询按钮 ---------- */
.outline-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #3E92CC;
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 24px;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    margin-left: 10px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(62, 146, 204, 0.3);
    white-space: nowrap;
    text-decoration: none;
}

    .outline-btn:hover {
        background: #2a7bb8;
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(62, 146, 204, 0.4);
        color: #fff;
    }

/* ---------- 移动端菜单按钮 ---------- */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

    .mobile-menu-btn:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    .mobile-menu-btn svg {
        width: 26px;
        height: 26px;
        stroke: #fff;
    }

/* ---------- 移动端菜单面板 ---------- */
.mobile-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 36, 99, 0.98);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    padding: 12px 20px 32px;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    visibility: hidden;
    pointer-events: none;
}

    .mobile-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

.mobile-nav-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.mobile-nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

    .mobile-nav-head > a,
    .mobile-nav-item > a {
        display: block;
        flex: 1;
        padding: 14px 0;
        color: rgba(255, 255, 255, 0.85);
        font-size: 1.02rem;
        font-weight: 500;
        text-decoration: none;
    }

        .mobile-nav-head > a:active,
        .mobile-nav-item > a:active {
            color: #fff;
        }

.mobile-toggle {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 0;
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: background 0.25s ease, color 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

    .mobile-toggle:hover,
    .mobile-toggle:active {
        background: rgba(255, 255, 255, 0.09);
        color: #fff;
    }

    .mobile-toggle .arrow {
        display: inline-block;
        font-size: 0.72rem;
        line-height: 1;
        transition: transform 0.3s ease;
    }

    .mobile-toggle[aria-expanded="true"] .arrow {
        transform: rotate(180deg);
    }

/* 移动端内联展开的子菜单 */
.mobile-sub {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding-left: 14px;
    border-left: 2px solid rgba(62, 146, 204, 0.35);
    margin-left: 3px;
}

    .mobile-sub.open {
        max-height: 1400px;
    }

    .mobile-sub .mobile-sub {
        border-left-color: rgba(122, 191, 255, 0.5);
        padding-left: 12px;
    }

    .mobile-sub .mobile-nav-head > a {
        font-size: 0.96rem;
        color: rgba(255, 255, 255, 0.78);
        padding: 12px 0;
    }

    .mobile-sub .mobile-nav-item {
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

.mobile-leaf {
    display: block;
    padding: 11px 0;
    color: rgba(255, 255, 255, 0.62);
    font-size: 0.92rem;
    transition: color 0.2s ease, padding-left 0.2s ease;
    text-decoration: none;
}

    .mobile-leaf:hover,
    .mobile-leaf:active {
        color: #fff;
        padding-left: 4px;
    }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
    .desktop-nav {
        display: none;
    }

    .mobile-menu-btn {
        display: inline-flex;
    }

    .site-header {
        height: 64px;
    }

    .mobile-menu {
        top: 64px;
        max-height: calc(100vh - 64px);
    }
}