}

/* 对齐 legacy: 40px, 1.4em icon */
.float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    min-height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--float-btn-bg);
    color: var(--color-ink-3);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
    font-size: 1.4em;
    text-decoration: none;
}

.float-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    color: var(--color-primary);
    background: var(--surface-page);
    text-decoration: none;
}

.float-btn:active {
    transform: scale(0.95);
}

/* 回到顶部按钮 — 滚动后显示 */
.float-btn--top {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease;
}

.float-btn--top.is-visible {
    opacity: 1;
    visibility: visible;
    display: flex;
}

/* 主题切换按钮 */
#float-theme-toggle .float-btn__icon-moon {
    display: none !important;
}

#float-theme-toggle .float-btn__icon-sun {
    display: inline-block !important;
}

#float-theme-toggle[aria-pressed="true"] .float-btn__icon-moon,
.theme-dark #float-theme-toggle .float-btn__icon-moon,
html.dark #float-theme-toggle .float-btn__icon-moon,
body.dark-theme #float-theme-toggle .float-btn__icon-moon {
    display: inline-block !important;
}

#float-theme-toggle[aria-pressed="true"] .float-btn__icon-sun,
.theme-dark #float-theme-toggle .float-btn__icon-sun,
html.dark #float-theme-toggle .float-btn__icon-sun,
body.dark-theme #float-theme-toggle .float-btn__icon-sun {
    display: none !important;
}

/* 移动端隐藏浮动按钮（用 tabbar 代替） */
@media (max-width: 767px) {
    .float-right-btns {
        right: 12px;
        bottom: 80px;
    }

    .float-btn {
        width: 38px;
        height: 38px;
        font-size: 14px;
    }
}

/* ============================================================
 * 移动端底部 Tab 栏（模仿 legacy footer-tabbar）
 * ============================================================ */
.footer-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1035;
    min-height: var(--aksrt-footer-tabbar-height);
    background: var(--blur-bg);
    border-top: 1px solid var(--color-line-soft);
    padding: 0 0 env(safe-area-inset-bottom, 0px);
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -4px 5px var(--main-shadow, rgba(0, 0, 0, 0.06));
    -webkit-backdrop-filter: saturate(5) blur(20px);
    backdrop-filter: saturate(5) blur(20px);
    --tabbar-active-color: #f04494;
    --tabbar-icon-size: 24px;
    --tabbar-text-size: 10px;
}

.footer-tabbar.no-border {
    border-top: none;
}

.footer-tabbar.no-shadow {
    box-shadow: none;
}

.footer-tabbar.hide-text .tabbar-item span {
    display: none;
}

.footer-tabbar.has-animation .tabbar-item {
    transition: color 0.15s ease, transform 0.15s ease;
}

.footer-tabbar.has-animation .tabbar-item:active {
    transform: scale(0.9);
}

.footer-tabbar-placeholder {
    display: none;
    height: calc(var(--aksrt-footer-tabbar-height) + env(safe-area-inset-bottom, 0px));
}

@media (max-width: 767px) {
    .footer-tabbar {
        display: flex;
    }

    .footer-tabbar-placeholder {
        display: block;
    }

    /* 有 tabbar 时页脚需要额外底部间距 */
    .footer,
    .site-footer {
        padding-bottom: calc(var(--aksrt-footer-tabbar-height) + env(safe-area-inset-bottom, 0px));
    }
}

.tabbar-item {
    display: flex;
    flex: 1 1 0;
    min-width: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    min-height: 49px;
    padding: 4px 0 3px;
    color: var(--muted-color, var(--color-ink-3));
    font-size: 13px;
    text-decoration: none;
    border: none;
    background: none;
    cursor: pointer;
    transition: color 0.15s ease;
    -webkit-tap-highlight-color: transparent;
    position: relative;
}

/* 对齐 legacy: 24px 图标 */
.tabbar-item i {
    font-size: var(--tabbar-icon-size, 24px);
    line-height: 1;
}

.tabbar-item span {
    display: block;
    font-size: var(--tabbar-text-size, 10px);
    font-weight: 500;
    line-height: 1;
    transform: scale(0.8);
    transform-origin: center top;
}

.tabbar-item:hover,
.tabbar-item.active {
    color: var(--tabbar-active-color, var(--color-primary));
    text-decoration: none;
}

.tabbar-item.active i {
    font-weight: 900;
}

.tabbar-badge {
    position: absolute;
    top: 2px;
    right: 8px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 999px;
    background: var(--color-error);
    color: #fff;
    font-size: 10px;
    line-height: 16px;
    font-style: normal;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.20);
}

.tabbar-badge--dot {
    min-width: 0;
    width: 8px;
    height: 8px;
    padding: 0;
    top: 4px;
    right: 10px;
    font-size: 0;
    line-height: 1;
    box-shadow: 0 0 0 2px var(--blur-bg);
}

.tabbar-item--add {
    margin-top: -22px;
    width: 62px;
    height: 62px;
    min-height: 62px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 12px 24px var(--color-accent-shadow);
    flex: 0 0 62px;
    z-index: 1;
}

.tabbar-item--add i {
    font-size: 22px;
}

.tabbar-item--add span {
    font-size: 11px;
}

.tabbar-item--add:hover,
.tabbar-item--add.active {
    color: #fff;
}

.tabbar-add-backdrop {
    position: fixed;
    inset: 0;
    z-index: 951;
    background: rgba(15, 23, 42, 0.38);
}

.tabbar-add-panel {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 952;
    padding: 0 12px calc(84px + env(safe-area-inset-bottom, 0px));
}

.tabbar-add-panel__sheet {
    border-radius: 20px;
    background: var(--surface-1);
    border: none;
    box-shadow: var(--shadow-drawer);
    overflow: hidden;
}

.tabbar-add-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px 12px;
    border-bottom: 1px solid var(--color-line);
}

.tabbar-add-panel__close {
    width: 32px;
    height: 32px;
    border: 0;
    border-radius: 50%;
    background: var(--surface-2);
    color: var(--color-ink-3);
}

.tabbar-add-panel__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    padding: 18px;
}

.tabbar-add-panel__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;