.top-nav {
        position: sticky;
        top: 0;
        z-index: 40;
        padding: 16px;
        background: linear-gradient(180deg, rgba(243, 245, 247, 0.96) 0%, rgba(243, 245, 247, 0.72) 70%, rgba(243, 245, 247, 0) 100%);
        backdrop-filter: blur(10px);
    }

    .top-nav-box {
        max-width: 1120px;
        margin: 0 auto;
        padding: 12px 18px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        border: 1px solid var(--theme-border);
        border-radius: 22px;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    }

    [data-theme="dark"] .top-nav-box {
        background: rgba(22, 32, 50, 0.92);
    }

    .top-nav-logo {
        min-width: 0;
        display: flex;
        align-items: center;
        gap: 12px;
        text-decoration: none;
    }

    .logo-img,
    .logo-mark {
        width: 42px;
        height: 42px;
        flex-shrink: 0;
        border-radius: 14px;
    }

    .logo-mark {
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        background: var(--theme-primary-gradient);
        box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
    }

    .logo-copy {
        min-width: 0;
        display: flex;
        flex-direction: column;
        gap: 2px;
    }

    .logo-title-row {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .logo-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--theme-text);
    }

    .logo-badge {
        padding: 2px 8px;
        border-radius: 999px;
        font-size: 11px;
        color: var(--theme-primary);
        background: color-mix(in srgb, var(--theme-primary) 12%, white);
    }

    .logo-subtitle {
        max-width: 360px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 12px;
        color: var(--theme-text-secondary);
    }

    .top-nav-menu {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
    }

    .top-nav-menu > a,
    .nav-menu-item {
        padding: 9px 14px;
        border-radius: 999px;
        color: var(--theme-text-secondary);
        text-decoration: none;
        font-size: 13px;
    }

    .top-nav-menu > a:hover,
    .top-nav-menu > a.active,
    .nav-menu-item:hover,
    .nav-menu-item.active {
        color: var(--theme-text);
        background: var(--theme-card);
    }

    .top-nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .theme-switcher {
        position: relative;
    }

    .theme-switcher-btn,
    .nav-contact-btn,
    .nav-menu-icon {
        height: 38px;
        border: 1px solid var(--theme-border);
        background: var(--theme-surface);
        color: var(--theme-text-secondary);
        border-radius: 999px;
        cursor: pointer;
    }

    .theme-switcher-btn,
    .nav-contact-btn {
        padding: 0 14px;
        font-size: 13px;
    }

    .nav-menu-icon {
        width: 38px;
        display: none;
        align-items: center;
        justify-content: center;
        font-size: 18px;
    }

    .nav-search-icon-btn {
        width: 38px;
        height: 38px;
        display: none;
        align-items: center;
        justify-content: center;
        border: 1px solid var(--theme-border);
        background: var(--theme-surface);
        color: var(--theme-text-secondary);
        border-radius: 999px;
        cursor: pointer;
        transition: all 0.2s ease;
    }

    .nav-search-icon-btn:hover {
        color: var(--theme-primary);
        border-color: var(--theme-border-strong);
        background: var(--theme-card);
    }

    .theme-switcher-btn:hover,
    .nav-contact-btn:hover,
    .nav-menu-icon:hover {
        color: var(--theme-primary);
        border-color: var(--theme-border-strong);
        background: var(--theme-card);
    }

    .theme-dropdown {
        position: absolute;
        right: 0;
        top: calc(100% + 8px);
        min-width: 136px;
        padding: 8px;
        border-radius: 16px;
        border: 1px solid var(--theme-border);
        background: var(--theme-surface);
        box-shadow: 0 18px 40px rgba(15, 23, 42, 0.14);
        z-index: 10;
    }

    .theme-option {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 8px 10px;
        border-radius: 12px;
        cursor: pointer;
        color: var(--theme-text);
    }

    .theme-option:hover {
        background: var(--theme-card);
    }

    .theme-option.active {
        background: var(--theme-primary-gradient);
        color: #fff;
    }

    .theme-dot {
        width: 12px;
        height: 12px;
        border-radius: 50%;
        flex-shrink: 0;
    }

    .theme-name {
        font-size: 12px;
    }

    .qrcode-card img {
        width: 100%;
        border-radius: 14px;
    }

    .request-box {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .request-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--theme-text);
    }

    .request-submit {
        height: 42px;
        border: none;
        border-radius: 12px;
        background: var(--theme-primary-gradient);
        color: #fff;
        cursor: pointer;
    }

    .nav-drawer {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .nav-drawer-menu {
        display: flex;
        flex-direction: column;
        gap: 6px;
    }

    .nav-drawer-menu > a,
    .nav-drawer-item {
        display: flex;
        align-items: center;
        min-height: 42px;
        padding: 0 14px;
        border-radius: 12px;
        color: var(--theme-text);
        background: var(--theme-card);
        text-decoration: none;
        cursor: pointer;
    }

    .nav-drawer-menu > a.active,
    .nav-drawer-item.active {
        color: #fff;
        background: var(--theme-primary-gradient);
    }

    .resource-dialog .el-dialog__header {
        margin: 0;
        padding: 18px 20px 0;
    }

    .resource-dialog-content {
        padding: 20px;
        text-align: center;
    }

    .resource-url-box {
        margin: 18px 0 14px;
        padding: 12px 14px;
        border-radius: 12px;
        background: var(--theme-card);
        text-align: left;
        word-break: break-all;
    }

    .resource-actions {
        display: flex;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .resource-actions .primary-btn,
    .resource-actions .secondary-btn {
        min-width: 110px;
        height: 40px;
        padding: 0 14px;
        border-radius: 12px;
        text-decoration: none;
        border: 1px solid var(--theme-border);
        cursor: pointer;
    }

    .resource-actions .primary-btn {
        color: #fff;
        border: none;
        background: var(--theme-primary-gradient);
    }

    .resource-actions .secondary-btn {
        color: var(--theme-text);
        background: var(--theme-surface);
    }

    @media (max-width: 900px) {
        .top-nav-menu,
        .nav-contact-btn {
            display: none;
        }

        .nav-menu-icon {
            display: inline-flex;
        }

        .nav-search-icon-btn {
            display: flex;
        }

        .logo-subtitle {
            max-width: 180px;
        }
    }

    @media (max-width: 640px) {
        .top-nav {
            padding: 12px;
        }

        .top-nav-box {
            padding: 10px 12px;
            border-radius: 18px;
        }

        .logo-subtitle,
        .theme-switcher-btn {
            display: none;
        }
    }

    .top-nav {
        padding: 20px 20px 8px;
        background: linear-gradient(180deg, rgba(237, 241, 235, 0.96) 0%, rgba(237, 241, 235, 0.82) 74%, rgba(237, 241, 235, 0) 100%);
    }

    .top-nav-box {
        max-width: 1160px;
        padding: 14px 0;
        gap: 24px;
        border: none;
        border-bottom: 1px solid var(--theme-border);
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .top-nav-logo {
        gap: 14px;
    }

    .logo-img,
    .logo-mark {
        width: 46px;
        height: 46px;
        border-radius: 16px;
    }

    .logo-mark {
        position: relative;
        background: #1b2230;
        box-shadow: none;
    }

    .logo-mark::after {
        content: "";
        position: absolute;
        inset: 4px;
        border: 1px solid rgba(255, 255, 255, 0.26);
        border-radius: 12px;
    }

    .logo-title {
        font-size: 18px;
        letter-spacing: -0.03em;
    }

    .logo-badge {
        padding: 3px 10px;
        font-size: 10px;
        letter-spacing: 0.14em;
        text-transform: uppercase;
        color: var(--theme-text-secondary);
        background: transparent;
        border: 1px solid var(--theme-border);
    }

    .logo-subtitle {
        font-size: 11px;
        letter-spacing: 0.08em;
        text-transform: uppercase;
    }

    .top-nav-menu {
        gap: 18px;
    }

    .top-nav-menu > a,
    .nav-menu-item {
        position: relative;
        padding: 8px 0;
        border-radius: 0;
        background: transparent;
        color: var(--theme-text-secondary);
        font-size: 13px;
        letter-spacing: 0.04em;
    }

    .top-nav-menu > a::after,
    .nav-menu-item::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: -14px;
        height: 2px;
        background: var(--theme-primary);
        transform: scaleX(0);
        transform-origin: left center;
        transition: transform 0.2s ease;
    }

    .top-nav-menu > a:hover,
    .top-nav-menu > a.active,
    .nav-menu-item:hover,
    .nav-menu-item.active {
        color: var(--theme-text);
        background: transparent;
    }

    .top-nav-menu > a:hover::after,
    .top-nav-menu > a.active::after,
    .nav-menu-item:hover::after,
    .nav-menu-item.active::after {
        transform: scaleX(1);
    }

    .top-nav-actions {
        gap: 12px;
    }

    .theme-switcher-btn,
    .nav-contact-btn,
    .nav-menu-icon {
        height: 40px;
        border-radius: 14px;
        background: rgba(252, 252, 248, 0.82);
    }

    .theme-switcher-btn,
    .nav-contact-btn {
        padding: 0 16px;
        letter-spacing: 0.04em;
    }

    .nav-contact-btn {
        border-color: var(--theme-primary);
        color: var(--theme-primary);
    }

    .nav-contact-btn:hover {
        color: #fff;
        background: var(--theme-primary);
    }

    .theme-dropdown {
        top: calc(100% + 10px);
        padding: 10px;
        border-radius: 18px;
        background: rgba(252, 252, 248, 0.96);
    }

    .theme-option {
        border-radius: 14px;
    }

    .qrcode-card p {
        font-size: 13px;
        line-height: 1.7;
    }

    .resource-dialog-content {
        padding: 24px;
    }

    .resource-url-box {
        border: 1px solid var(--theme-border);
        background: var(--theme-card-gradient);
    }

    @media (max-width: 900px) {
        .top-nav {
            padding: 14px 16px 6px;
        }

        .top-nav-box {
            padding: 12px 0;
        }

        .top-nav-menu {
            gap: 14px;
        }
    }

    @media (max-width: 640px) {
        .top-nav {
            padding: 12px;
        }

        .top-nav-box {
            gap: 12px;
        }

        .logo-badge,
        .top-nav-menu {
            display: none;
        }
    }

/* naspt 顶部进群浮层与侧边防失联按钮 */
.group-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 40px;
    background: var(--color-primary, #fd9000);
    color: #ffffff;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.group-banner:hover {
    background: var(--color-primary-dark, #ffa836);
}

.group-banner .banner-text {
    font-weight: 500;
}

.group-banner .banner-arrow {
    font-size: 16px;
    opacity: 0.8;
}

.group-banner .banner-close {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 18px;
    cursor: pointer;
    padding: 2px 6px;
    line-height: 1;
}

.group-banner .banner-close:hover {
    color: #ffffff;
}

.group-banner ~ .top-nav {
    margin-top: 36px !important;
}

.floating-group {
    position: fixed;
    right: 0;
    top: calc(50% - 80px);
    z-index: 9997;
    transition: opacity 0.3s;
}

.floating-group.is-scrolling {
    opacity: 0.45;
}

.floating-group .float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fd9000;
    border-radius: 6px 0 0 6px;
    padding: 10px 14px;
    cursor: pointer;
    box-shadow: rgba(0, 0, 0, 0.15) -2px 2px 8px;
    transition: 0.2s;
}

.floating-group .float-btn:hover {
    background: #ffa836;
    padding-right: 18px;
}

.floating-group .float-btn:active {
    opacity: 0.85;
}

.floating-group .float-btn span {
    font-size: 12px;
    color: #ffffff;
    font-weight: 600;
    line-height: 1.4;
    text-align: center;
}

/* naspt 进群二维码弹窗 */
.banner-qr-overlay {
    position: fixed;
    inset: 0;
    z-index: 10001;
    padding: 16px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-qr-box {
    width: 92%;
    max-width: 400px;
    overflow: hidden;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: bannerQrIn 0.3s ease;
}

.banner-qr-header {
    position: relative;
    padding: 20px;
    background: var(--theme-primary, #fd9000);
    color: #ffffff;
    text-align: center;
}

.banner-qr-header h3 {
    margin: 0 0 4px;
    font-size: 17px;
    font-weight: 600;
    line-height: 27.2px;
}

.banner-qr-header p {
    margin: 0;
    font-size: 13px;
    line-height: 20.8px;
    opacity: 0.9;
}

.banner-qr-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 26px;
    height: 26px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-qr-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.banner-qr-body {
    padding: 20px 16px;
    text-align: center;
}

.banner-qr-grid {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.banner-qr-item {
    flex: 1;
    min-width: 0;
}

.banner-qr-img-wrap {
    width: 140px;
    height: 140px;
    margin: 0 auto 8px;
    overflow: hidden;
    background: #f9f9f9;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-qr-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.banner-qr-label {
    margin: 0 0 2px;
    color: var(--theme-text, #1e293b);
    font-size: 14px;
    font-weight: 600;
    line-height: 22.4px;
}

.banner-qr-sublabel {
    margin: 0;
    color: #999999;
    font-size: 11px;
    line-height: 17.6px;
}

.banner-qr-tip {
    margin: 0;
    color: #999999;
    font-size: 12px;
    line-height: 19.2px;
}

.banner-qr-footer {
    padding: 0 20px 20px;
}

.banner-qr-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 50px;
    background: var(--theme-primary, #fd9000);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    line-height: 24px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.banner-qr-btn:hover {
    background: var(--theme-primary-dark, #ffa836);
}

.banner-qr-fade-enter-active,
.banner-qr-fade-leave-active {
    transition: opacity 0.2s ease;
}

.banner-qr-fade-enter-from,
.banner-qr-fade-leave-to {
    opacity: 0;
}

@keyframes bannerQrIn {
    0% {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@media (max-width: 768px) {
    .group-banner {
        padding: 6px 36px;
        font-size: 12px;
    }

    .group-banner ~ .top-nav {
        margin-top: 32px !important;
    }

    .floating-group {
        top: auto;
        bottom: calc(72px + env(safe-area-inset-bottom, 0px));
    }

    .floating-group .float-btn {
        padding: 9px 12px;
    }

    .floating-group .float-btn span {
        font-size: 11px;
    }
}

@media (max-width: 420px) {
    .banner-qr-overlay {
        padding: 12px;
    }

    .banner-qr-box {
        width: 94%;
    }

    .banner-qr-body {
        padding: 18px 12px;
    }

    .banner-qr-grid {
        gap: 10px;
    }

    .banner-qr-img-wrap {
        width: 130px;
        height: 130px;
    }
}