/* ========== 布局：侧边栏 / 页头 / 搜索 ========== */
/* 侧边栏浮动按钮：Uiverse hamburger → X 动画 */
.sidebar-float-btn {
    position: fixed; top: 24px; left: 24px; z-index: 100;
    width: var(--sidebar-toggle-size); height: var(--sidebar-toggle-size); border-radius: 50%;
    border: none; background: transparent; color: var(--text-sub);
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: transform 0.28s var(--ease-smooth), opacity 0.25s, color 0.2s, background 0.25s, box-shadow 0.28s;
    box-shadow: none;
    backdrop-filter: none; -webkit-backdrop-filter: none;
    touch-action: manipulation;
    -webkit-user-select: none; user-select: none;
    padding: 0;
}
.sidebar-float-btn:hover {
    color: var(--primary);
    background: var(--primary-glow);
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 8px 22px var(--primary-glow), 0 2px 8px var(--shadow-color);
}
.sidebar-float-btn:active {
    transform: translateY(0) scale(0.94);
    box-shadow: 0 2px 8px var(--primary-glow);
}

/* hamburger / X 图标（来自 Uiverse tame-eagle-29） */
.sidebar-toggle-icon {
    position: relative;
    width: 20px;
    height: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: transform 0.3s ease;
}
.sidebar-bar {
    display: block;
    width: 100%;
    height: 2.5px;
    background-color: currentColor;
    border-radius: 5px;
    transition: transform 0.3s ease, opacity 0.2s ease;
}
/* 侧边栏打开时：整体旋转 -90deg，bar1/bar2 形成 X（贴近原组件效果） */
.sidebar-float-btn.is-open .sidebar-toggle-icon {
    transform: rotate(-90deg);
}
.sidebar-float-btn.is-open .sidebar-bar1 {
    transform: translateY(7.5px) rotate(-60deg);
    transform-origin: left center;
}
.sidebar-float-btn.is-open .sidebar-bar2 {
    transform: translateY(0) rotate(60deg);
    transform-origin: right center;
}
.sidebar-float-btn.is-open .sidebar-bar3 {
    opacity: 0;
}

/* 右下角圆形展开菜单（方案A） */
.fab-menu-wrap {
    position: fixed;
    bottom: max(var(--fab-edge), env(safe-area-inset-bottom, 0px));
    right: max(var(--fab-edge), env(safe-area-inset-right, 0px));
    z-index: 100;
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
    gap: var(--fab-gap);
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}
.fab-menu-item {
    width: var(--fab-item-size);
    height: var(--fab-item-size);
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px var(--primary-glow);
    opacity: 0;
    transform: translateY(16px) scale(0.85);
    transition: all 0.28s var(--ease-smooth);
    pointer-events: none;
    cursor: pointer;
    border: none;
    color: var(--on-primary, #fff);
    padding: 0;
}
.fab-menu-wrap.open .fab-menu-item {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.fab-menu-item:nth-child(4) { transition-delay: 0s; }
.fab-menu-item:nth-child(3) { transition-delay: 0.05s; }
.fab-menu-item:nth-child(2) { transition-delay: 0.1s; }
.fab-menu-item:hover {
    background: var(--primary);
    filter: brightness(1.08);
    transform: translateY(-2px) scale(1.06);
    box-shadow: 0 8px 20px var(--primary-glow);
}
.fab-menu-item:active {
    transform: scale(0.94);
    filter: brightness(0.95);
}
.fab-menu-item svg {
    width: var(--fab-icon-size);
    height: var(--fab-icon-size);
    fill: var(--on-primary, #fff);
    pointer-events: none;
}
.fab-toggle-btn {
    width: var(--fab-toggle-size);
    height: var(--fab-toggle-size);
    border-radius: 50%;
    background: var(--primary);
    position: relative;
    cursor: pointer;
    box-shadow: 0 4px 16px var(--primary-glow);
    transition: background 0.25s ease, transform 0.28s var(--ease-smooth), box-shadow 0.28s, filter 0.25s ease;
    border: none;
    padding: 0;
}
.fab-toggle-btn:hover {
    background: var(--primary);
    filter: brightness(1.08);
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 10px 26px var(--primary-glow);
}
.fab-toggle-btn:active {
    transform: scale(0.94);
    filter: brightness(0.95);
}
.fab-toggle-btn::before,
.fab-toggle-btn::after {
    content: "";
    position: absolute;
    background: var(--on-primary, #fff);
    transition: transform 0.25s ease, width 0.2s ease, height 0.2s ease;
    border-radius: 2px;
}
.fab-toggle-btn::before {
    width: var(--fab-plus-len);
    height: var(--fab-plus-thick);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.fab-toggle-btn::after {
    width: var(--fab-plus-thick);
    height: var(--fab-plus-len);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.fab-menu-wrap.open .fab-toggle-btn::before {
    transform: translate(-50%, -50%) rotate(45deg);
}
.fab-menu-wrap.open .fab-toggle-btn::after {
    transform: translate(-50%, -50%) rotate(45deg);
}
html.light-mode .fab-menu-item,
html.light-mode .fab-toggle-btn {
    box-shadow: 0 4px 14px var(--primary-glow);
}

/* 遮罩层 */
.sidebar-overlay {
    position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); z-index: 98; opacity: 0;
    transition: opacity 0.3s var(--ease-smooth); pointer-events: none;
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    touch-action: manipulation;
}
.sidebar-overlay.show { opacity: 1; pointer-events: auto; }

/* 侧边栏 */
.sidebar {
    position: fixed; top: 0; left: 0; height: 100vh; height: 100dvh; width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.18);
    transition: transform 0.4s var(--ease-smooth); will-change: transform;
    z-index: 99; display: flex; flex-direction: column;
    padding: calc(72px + env(safe-area-inset-top)) 14px calc(16px + env(safe-area-inset-bottom));
    overflow: hidden;
    backdrop-filter: blur(18px) saturate(1.2); -webkit-backdrop-filter: blur(18px) saturate(1.2);
    overscroll-behavior: contain;
}
html.light-mode .sidebar {
    border-right-color: rgba(15, 23, 42, 0.08);
    box-shadow: 8px 0 32px rgba(15, 23, 42, 0.08);
}
.sidebar.collapsed { transform: translateX(-100%); }

/* 顶部标题区 */
.sidebar-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 10px 14px;
    margin-bottom: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}
html.light-mode .sidebar-header {
    border-bottom-color: rgba(15, 23, 42, 0.08);
}
.sidebar-header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 10px;
    color: var(--text-sub);
    background: rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}
html.light-mode .sidebar-header-icon {
    color: var(--text-sub);
    background: rgba(15, 23, 42, 0.05);
}
.sidebar-header-icon svg {
    display: block;
}
.sidebar-header-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 0.02em;
}

.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    padding: 4px 2px 8px 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}
html.light-mode .sidebar-menu {
    scrollbar-color: rgba(15, 23, 42, 0.12) transparent;
}
.sidebar-menu::-webkit-scrollbar { width: 4px; }
.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
html.light-mode .sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(15, 23, 42, 0.12);
}

.sidebar-empty {
    padding: 28px 12px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-sub);
    opacity: 0.75;
}

.sidebar-group-block {
    margin-bottom: 4px;
}
.sidebar-group-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 12px;
    margin-bottom: 0;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.sidebar-group-row:hover { background: var(--sidebar-item-hover); }
.sidebar-group-row.active {
    background: var(--primary-glow);
    color: var(--primary);
    font-weight: 600;
}
.sidebar-chevron,
.sidebar-chevron-spacer {
    flex-shrink: 0;
    width: var(--sidebar-chevron-size);
    height: var(--sidebar-row-min);
    min-width: var(--sidebar-chevron-size);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 2px;
    border: none;
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    border-radius: 8px;
    padding: 0;
    transition: color 0.18s, background 0.18s, transform 0.2s var(--ease-smooth);
    touch-action: manipulation;
}
.sidebar-chevron:hover {
    color: var(--primary);
    background: var(--primary-glow);
}
.sidebar-chevron-icon {
    transition: transform 0.22s var(--ease-smooth);
}
.sidebar-chevron.open .sidebar-chevron-icon {
    transform: rotate(90deg);
}
.sidebar-group-item {
    flex: 1;
    padding: 10px 12px 10px 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    overflow: hidden;
    position: relative;
    min-height: var(--sidebar-row-min);
    touch-action: manipulation;
}
.sidebar-group-row.active .sidebar-group-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 55%;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 8px var(--primary-glow);
}
.sidebar-item-icon {
    flex-shrink: 0;
    color: var(--text-sub);
    opacity: 0.85;
    transition: color 0.18s, opacity 0.18s;
}
html.light-mode .sidebar-item-icon {
    color: var(--text-sub);
    opacity: 0.8;
}
.sidebar-group-row.active .sidebar-item-icon {
    color: var(--primary);
    opacity: 1;
}
.sidebar-group-row:hover .sidebar-item-icon {
    color: var(--primary);
    opacity: 1;
}
.sidebar-text {
    flex: 1;
    min-width: 0;
    font-size: 0.92rem;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-count {
    flex-shrink: 0;
    min-width: 22px;
    height: 20px;
    padding: 0 6px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 20px;
    text-align: center;
    color: var(--text-sub);
    background: rgba(255, 255, 255, 0.08);
    font-variant-numeric: tabular-nums;
}
html.light-mode .sidebar-count {
    background: rgba(15, 23, 42, 0.06);
}
.sidebar-group-row.active .sidebar-count {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.12);
}
html.light-mode .sidebar-group-row.active .sidebar-count {
    background: rgba(15, 23, 42, 0.06);
}

/* 二级目录（可折叠） */
.sidebar-sub-list {
    display: none;
    flex-direction: column;
    padding: 2px 0 6px 0;
    margin: 0 0 2px 14px;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
}
.sidebar-sub-list.open {
    display: flex;
}
html.light-mode .sidebar-sub-list {
    border-left-color: rgba(15, 23, 42, 0.08);
}
.sidebar-sub-row {
    border-radius: 10px;
    margin: 1px 0 1px 6px;
    transition: background 0.18s ease, color 0.18s ease, backdrop-filter 0.18s ease;
}
.sidebar-sub-row:hover {
    background: var(--sidebar-item-hover);
}
.sidebar-sub-row.active {
    /* 二级选中态：透明毛玻璃，避免实色白块过于突兀 */
    background: color-mix(in srgb, var(--primary) 12%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary);
    font-weight: 500;
}
.sidebar-sub-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px 8px 12px;
    cursor: pointer;
    min-height: var(--sidebar-sub-row-min);
    white-space: nowrap;
    overflow: hidden;
    position: relative;
    touch-action: manipulation;
}
.sidebar-sub-row.active .sidebar-sub-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 50%;
    background: var(--primary);
    border-radius: 0 2px 2px 0;
}
.sidebar-sub-icon {
    flex-shrink: 0;
    opacity: 0.65;
    color: var(--text-sub);
}
.sidebar-sub-row.active .sidebar-sub-icon,
.sidebar-sub-row:hover .sidebar-sub-icon {
    opacity: 1;
    color: var(--primary);
}
.sidebar-sub-item .sidebar-text {
    font-size: 0.86rem;
}
.sidebar-sub-item .sidebar-count {
    min-width: 18px;
    height: 18px;
    line-height: 18px;
    font-size: 0.68rem;
    padding: 0 5px;
}
.sidebar-sub-row.active .sidebar-count {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.12);
}
html.light-mode .sidebar-sub-row.active .sidebar-count {
    background: rgba(15, 23, 42, 0.06);
}

/* 汉堡按钮：打开时轻微玻璃底，复杂壁纸上更易辨认 */
.sidebar-float-btn.is-open {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
html.light-mode .sidebar-float-btn.is-open {
    background: rgba(255, 255, 255, 0.75);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.1);
}

/* 主页右上角明暗切换开关 - 基于 Uiverse.io/JkHuger/old-falcon-20 适配 */
.theme-switch {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    transition: transform 0.28s var(--ease-smooth), opacity 0.25s;
}
.theme-switch:hover {
    transform: translateY(-2px) scale(1.05);
}
.theme-switch:active {
    transform: translateY(0) scale(0.96);
}
.theme-switch__toggle-wrap {
    position: relative;
    flex-shrink: 0;
}
.theme-switch__toggle {
    background-color: hsl(48, 90%, 85%);
    border-radius: 25% / 50%;
    box-shadow: 0 0 0 0.125em transparent;
    padding: 0.2em;
    width: 3.6em;
    height: 1.8em;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out, box-shadow 0.15s ease-in-out;
    display: block;
    margin: 0;
}
.theme-switch__toggle:before {
    background-color: hsl(48, 90%, 55%);
    border-radius: 50%;
    content: "";
    display: block;
    width: 1.4em;
    height: 1.4em;
    transition: 0.3s;
}
.theme-switch__toggle:focus {
    outline: transparent;
}
.theme-switch__toggle:focus-visible {
    box-shadow: 0 0 0 0.125em var(--primary);
}
.theme-switch__icon,
.theme-switch__icon-part {
    position: absolute;
}
.theme-switch__icon {
    display: block;
    top: 0.28em;
    left: 0.28em;
    width: 1.24em;
    height: 1.24em;
    z-index: 1;
    pointer-events: none;
    transition: transform 0.3s ease-in-out;
}
.theme-switch__icon-part {
    border-radius: 50%;
    box-shadow: 0.28em -0.28em 0 0.35em hsl(0, 0%, 100%) inset;
    top: calc(50% - 0.35em);
    left: calc(50% - 0.35em);
    width: 0.7em;
    height: 0.7em;
    transition: box-shadow 0.3s ease-in-out, opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    transform: scale(0.5);
}
.theme-switch__icon-part ~ .theme-switch__icon-part {
    background-color: hsl(0, 0%, 100%);
    border-radius: 0.05em;
    top: 50%;
    left: calc(50% - 0.04em);
    transform: rotate(0deg) translateY(0.35em);
    transform-origin: 50% 0;
    width: 0.08em;
    height: 0.15em;
}
.theme-switch__icon-part:nth-child(3) { transform: rotate(45deg) translateY(0.32em); }
.theme-switch__icon-part:nth-child(4) { transform: rotate(90deg) translateY(0.32em); }
.theme-switch__icon-part:nth-child(5) { transform: rotate(135deg) translateY(0.32em); }
.theme-switch__icon-part:nth-child(6) { transform: rotate(180deg) translateY(0.32em); }
.theme-switch__icon-part:nth-child(7) { transform: rotate(225deg) translateY(0.32em); }
.theme-switch__icon-part:nth-child(8) { transform: rotate(270deg) translateY(0.35em); }
.theme-switch__icon-part:nth-child(9) { transform: rotate(315deg) translateY(0.35em); }

/* Checked = 深色模式（月亮） */
.theme-switch__toggle:checked {
    background-color: hsl(198, 90%, 15%);
}
.theme-switch__toggle:checked:before,
.theme-switch__toggle:checked ~ .theme-switch__icon {
    transform: translateX(1.8em);
}
.theme-switch__toggle:checked:before {
    background-color: hsl(198, 90%, 55%);
}
.theme-switch__toggle:checked ~ .theme-switch__icon .theme-switch__icon-part:nth-child(1) {
    box-shadow: 0.14em -0.14em 0 0.14em hsl(0, 0%, 100%) inset;
    transform: scale(1);
    top: 0.14em;
    left: -0.14em;
}
.theme-switch__toggle:checked ~ .theme-switch__icon .theme-switch__icon-part ~ .theme-switch__icon-part {
    opacity: 0;
}

/* 主页面框架 */
.page-wrap {
    flex: 1; width: 100%; min-width: 0;
    padding: calc(56px + env(safe-area-inset-top)) 40px calc(120px + env(safe-area-inset-bottom));
    display: flex; flex-direction: column; align-items: center; margin-left: 0;
    transition: margin-left 0.4s var(--ease-smooth);
    min-height: 100dvh;
    position: relative;
    z-index: 1;
}

header { text-align: center; margin-bottom: 36px; width: 100%; user-select: none; }

/* 主页时钟：极简纯色，无渐变 / 动画 / 阴影 */
.clock {
    display: inline-flex;
    align-items: baseline;
    justify-content: center;
    font-size: clamp(2.8rem, 11vw, 5rem);
    font-weight: 300;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
    color: var(--text-main);
}
.clock-h,
.clock-m,
.clock-colon {
    color: var(--text-main);
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
    -webkit-text-fill-color: unset;
}
.clock-colon {
    display: inline-block;
    margin: 0 0.04em;
    animation: none;
    opacity: 1;
}
.clock-sec {
    display: none;
}

/* 日期：单行纯文字 */
.date-display {
    display: block;
    text-align: center;
    color: var(--text-main);
    font-size: 1.05rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    opacity: 0.92;
}
.date-main {
    letter-spacing: 0.04em;
}
.date-weekday {
    display: none;
}

/* 搜索框组 —— 引擎胶囊段 + 弱分隔 + 聚焦主色提交 */
.search-wrapper { width: 100%; max-width: 680px; margin: 0 auto 42px; position: relative; z-index: 10; display: flex; gap: 12px; align-items: center; }
.search-input-box {
    display: flex;
    align-items: center;
    position: relative;
    flex: 1;
    border: 1px solid transparent;
    border-radius: 12px;
    /* 与链接卡片同风格；--chrome-bg 有透明度下限，保证文字清晰 */
    background: var(--chrome-bg, var(--card-solid-bg, var(--card-glass-bg)));
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08), 0 4px 16px var(--shadow-color);
    transition: border-color 0.2s var(--ease-smooth), box-shadow 0.2s var(--ease-smooth), transform 0.2s var(--ease-smooth), background 0.2s ease;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 4px 4px 4px 4px;
    min-height: 54px;
}
html.light-mode .search-input-box {
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.07), 0 3px 12px rgba(15, 23, 42, 0.05);
}
.search-input-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 8px 22px var(--shadow-color), 0 0 0 1px var(--primary-glow);
    transform: translateY(-1px);
}
@media (hover: none) {
    .search-input-box:focus-within {
        transform: none;
    }
}

/* 左侧引擎段：轻胶囊 */
.engine-toggle {
    flex-shrink: 0;
    padding: 10px 14px;
    margin: 0;
    cursor: pointer;
    color: var(--text-main);
    opacity: 0.85;
    font-size: 0.92rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    border: none;
    border-radius: 0.65rem;
    background: rgba(255, 255, 255, 0.04);
    transition: color 0.2s, background 0.2s;
    white-space: nowrap;
    min-height: 42px;
}
html.light-mode .engine-toggle {
    background: rgba(15, 23, 42, 0.04);
}
.engine-toggle:hover {
    color: var(--primary);
    background: var(--primary-glow);
}
.engine-toggle.open {
    color: var(--primary);
    background: var(--primary-glow);
}
.engine-chevron {
    opacity: 0.55;
    transition: transform 0.28s var(--ease-smooth), opacity 0.2s;
}
.engine-toggle:hover .engine-chevron,
.engine-toggle.open .engine-chevron {
    opacity: 1;
}
.engine-toggle.open .engine-chevron {
    transform: rotate(180deg);
}

/* 弱分隔线 */
.search-divider {
    flex-shrink: 0;
    width: 1px;
    height: 22px;
    margin: 0 4px 0 6px;
    background: var(--border-normal);
    opacity: 0.85;
    border-radius: 1px;
}

.search-input {
    flex: 1;
    padding: 12px 8px 12px 10px;
    background: transparent;
    border: none;
    font-size: 1rem;
    outline: none;
    color: var(--text-main);
    height: 42px;
    min-width: 0;
    /* 低透明度背景上保持字可读 */
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}
html.light-mode .search-input {
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.55);
}
.search-input::placeholder {
    color: var(--text-sub);
    opacity: 0.7;
}
.search-input-box:focus-within .search-input::placeholder {
    opacity: 0.55;
}

/* 清空按钮 */
.search-clear-btn {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    margin-right: 2px;
    border: none;
    border-radius: 0.5rem;
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.15s, color 0.15s, background 0.15s;
    touch-action: manipulation;
}
.search-clear-btn:hover {
    opacity: 1;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}
html.light-mode .search-clear-btn:hover {
    background: rgba(15, 23, 42, 0.06);
}
.search-clear-btn[hidden] {
    display: none !important;
}

/* 搜索按钮：聚焦时主色实心 */
.search-submit-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    margin-right: 2px;
    border: none;
    border-radius: 0.65rem;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-sub);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s var(--ease-smooth), background 0.2s, color 0.2s, box-shadow 0.2s;
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}
html.light-mode .search-submit-btn {
    background: rgba(15, 23, 42, 0.05);
}
.search-submit-btn:hover {
    color: #fff;
    background: var(--primary);
    box-shadow: 0 4px 14px var(--primary-glow);
}
.search-submit-btn:active {
    transform: scale(0.96);
    box-shadow: none;
}
.search-input-box:focus-within .search-submit-btn {
    color: #fff;
    background: var(--primary);
    box-shadow: 0 4px 14px var(--primary-glow);
}
html.light-mode .search-input-box:focus-within .search-submit-btn,
html.light-mode .search-submit-btn:hover {
    color: #fff;
}

/* 引擎下拉：圆角与主栏统一 + 轻位移 */
.engine-list {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: min(220px, 100%);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transform: translateY(-4px);
    transition: max-height 0.28s var(--ease-smooth), opacity 0.22s var(--ease-smooth), padding 0.22s var(--ease-smooth), transform 0.22s var(--ease-smooth);
    background: #18181b;
    border: 1px solid var(--border-normal);
    border-radius: 0.75rem;
    box-shadow: 0 16px 40px var(--shadow-color);
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 0;
    z-index: 100;
    pointer-events: none;
    visibility: hidden;
}
html.light-mode .engine-list {
    background: #ffffff;
}
.engine-list.open {
    max-height: 300px;
    opacity: 1;
    padding: 6px;
    overflow-y: auto;
    pointer-events: auto;
    visibility: visible;
    transform: translateY(0);
}
.engine-btn {
    width: 100%;
    padding: 10px 14px;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    transition: background 0.18s, color 0.18s, border-color 0.18s, box-shadow 0.18s;
    font-size: 0.92rem;
    text-align: left;
}
.engine-btn.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    border-color: transparent;
    box-shadow: 0 3px 12px var(--primary-glow);
}
.engine-btn:hover:not(.active) {
    background: var(--sidebar-item-hover);
    color: var(--text-main);
}

/* 主容器 & 分组板块（直显模式） */
.main-container { width: 100%; max-width: 1380px; }
.group-section {
    margin-bottom: 48px;
    scroll-margin-top: 90px;
    position: relative;
    border-radius: 20px;
    content-visibility: auto;
    contain-intrinsic-size: auto 320px;
    contain: layout style;
}

.group-header {
    display: flex;
    align-items: center;
    margin: 0 0 14px 0;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    user-select: none;
}
.group-title-wrap {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 0;
}
.group-title {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
}
.group-title::before {
    content: '';
    width: 3px;
    height: 1.05em;
    border-radius: 2px;
    background: var(--primary);
    flex-shrink: 0;
    opacity: 0.9;
}
.group-meta {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-sub);
    opacity: 0.55;
    letter-spacing: 0.02em;
    padding-left: 13px; /* 对齐标题文字，避开竖条 */
}

/* 子分类标签栏 —— 与链接卡片同一套背景 / 阴影 */
.tab-bar-wrap {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 16px;
    background: var(--chrome-bg, var(--card-solid-bg, var(--card-glass-bg)));
    padding: 0.25rem;
    border-radius: 12px;
    border: 1px solid transparent;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08), 0 4px 16px var(--shadow-color);
    max-width: 100%;
    width: max-content;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: background 0.2s ease, box-shadow 0.2s ease;
}
html.light-mode .tab-bar-wrap {
    background: var(--chrome-bg, var(--card-solid-bg, var(--card-glass-bg)));
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.07), 0 3px 12px rgba(15, 23, 42, 0.05);
}
.tab-scroll {
    flex: 1;
    min-width: 0;
    overflow-x: auto;
    display: flex;
    gap: 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.tab-scroll::-webkit-scrollbar { display: none; }
.tab-item {
    flex-shrink: 0;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-main);
    opacity: 0.78;
    background: transparent;
    padding: 0.45rem 0.9rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: color 0.15s ease-in-out, background 0.15s ease-in-out, box-shadow 0.15s ease-in-out, opacity 0.15s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    min-height: 34px;
    width: auto;
    white-space: nowrap;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
html.light-mode .tab-item {
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.5);
}
.tab-item.active {
    /* 直显模式二级标签选中：透明毛玻璃，避免实心白块 */
    background: color-mix(in srgb, var(--primary) 18%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary);
    font-weight: 600;
    opacity: 1;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
    text-shadow: none;
}
html.light-mode .tab-item.active {
    background: color-mix(in srgb, var(--primary) 14%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    text-shadow: none;
}
.tab-item:hover:not(.active) {
    color: var(--text-main);
    opacity: 1;
    background: transparent;
}
html.light-mode .tab-item:hover:not(.active) {
    color: #334155;
}

.tab-panel { display: none; content-visibility: hidden; }
.tab-panel.active { display: block; content-visibility: visible; }


/* ========== 首页文件夹布局（极简描边 SVG + 居中网格） ========== */
.folder-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 32px 40px;
    padding: 28px 20px 56px;
    max-width: 880px;
    margin: 48px auto 0;
}
.folder-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 12px 14px 14px;
    min-width: 84px;
    max-width: 112px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 14px;
    cursor: grab;
    transition: transform 0.2s var(--ease-smooth), opacity 0.2s, border-color 0.15s, box-shadow 0.18s, background 0.18s, color 0.18s;
    color: inherit;
    box-shadow: none;
}
.folder-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}
html.light-mode .folder-card:hover {
    background: rgba(15, 23, 42, 0.03);
    border-color: rgba(15, 23, 42, 0.08);
}
.folder-card:active {
    transform: scale(0.97);
    cursor: grabbing;
}
.folder-card.dragging {
    opacity: 0.4;
    transform: scale(0.96);
    cursor: grabbing;
}
.folder-card.drag-over {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
    transform: translateY(-2px);
}
.group-section.dragging {
    opacity: 0.45;
}
.group-section.drag-over {
    box-shadow: 0 0 0 2px var(--primary-glow);
    outline: 2px dashed var(--primary);
    outline-offset: 4px;
}
.group-header {
    cursor: grab;
}
.group-header:active {
    cursor: grabbing;
}
.tab-item {
    cursor: grab;
}
.tab-item.dragging {
    opacity: 0.45;
}
.tab-item.drag-over {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 2px var(--primary-glow);
}

/* 移动端长按拖拽：跟随手指的幽灵节点 + 锁定页面滚动 */
.touch-drag-ghost {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 99999;
    pointer-events: none;
    opacity: 0.92;
    transform: translate3d(-9999px, -9999px, 0);
    will-change: transform;
    filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.35));
    border-radius: 12px;
}
body.is-touch-dragging {
    overflow: hidden !important;
    touch-action: none !important;
    user-select: none !important;
    -webkit-user-select: none !important;
}
body.is-touch-dragging .folder-card,
body.is-touch-dragging .group-header,
body.is-touch-dragging .tab-item {
    -webkit-touch-callout: none;
}
.folder-icon {
    position: relative;
    width: 56px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* 文件夹 SVG 边框绑定强调色 */
    color: var(--primary);
    transition: color 0.2s ease, transform 0.2s var(--ease-smooth), opacity 0.2s;
    opacity: 0.92;
}
.folder-card:hover .folder-icon {
    color: var(--primary);
    opacity: 1;
    transform: translateY(-1px);
}
html.light-mode .folder-icon {
    color: var(--primary);
    opacity: 0.88;
}
html.light-mode .folder-card:hover .folder-icon {
    color: var(--primary);
    opacity: 1;
}
.folder-icon svg {
    width: 44px;
    height: 44px;
    display: block;
}
.folder-icon svg .folder-outline,
.folder-icon svg .folder-line {
    fill: none;
    stroke: currentColor;
    stroke-linejoin: round;
    stroke-linecap: round;
}
.folder-icon svg .folder-outline {
    stroke-width: 1.5;
}
.folder-icon svg .folder-line {
    stroke-width: 1.5;
    opacity: 0.85;
}
/* 数量角标 */
.folder-badge {
    position: absolute;
    top: -2px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    font-size: 0.66rem;
    font-weight: 600;
    line-height: 18px;
    text-align: center;
    color: var(--on-primary, #fff);
    background: var(--primary);
    box-shadow: 0 0 0 2px var(--card-glass-bg, rgba(16, 16, 20, 0.9));
    pointer-events: none;
    font-variant-numeric: tabular-nums;
}
html.light-mode .folder-badge {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.95);
}
.folder-title {
    font-size: 0.86rem;
    font-weight: 500;
    text-align: center;
    line-height: 1.3;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-main);
    text-shadow: none;
}
html.light-mode .folder-title {
    color: var(--text-main);
    text-shadow: none;
}
.folder-card:hover .folder-title {
    color: var(--primary);
}
/* 主页隐藏 meta，数量信息由角标承担 */
.folder-meta {
    display: none;
}

/* 对话框内二级文件夹：显示数量说明 */
.folder-modal-body .folder-meta {
    display: block;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-sub);
    text-align: center;
    line-height: 1.25;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-shadow: none;
}
.folder-modal-body .folder-title {
    color: var(--text-main);
    text-shadow: none;
}
.folder-modal-body .folder-grid {
    gap: 22px 30px;
    padding: 12px 4px 8px;
    margin: 0;
}
.folder-modal-body .folder-icon {
    width: 52px;
    height: 48px;
}
.folder-modal-body .folder-icon svg {
    width: 40px;
    height: 40px;
}

.folder-empty {
    text-align: center;
    padding: var(--space-7) var(--space-4);
    color: var(--text-sub);
    font-size: 0.95rem;
}
.folder-empty.empty-state {
    padding: var(--space-7) var(--space-5);
}

/* 文件夹大型对话框（透明玻璃风格） */
#folderModal.modal-overlay {
    background: rgba(0, 0, 0, 0.32);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
html.light-mode #folderModal.modal-overlay {
    background: rgba(15, 23, 42, 0.2);
}
#folderModal .folder-modal {
    background: rgba(16, 16, 20, 0.34);
    width: 100%;
    max-width: 920px;
    border-radius: 24px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow:
        0 24px 64px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.04) inset;
    animation: popIn 0.3s var(--ease-smooth) forwards;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    position: relative;
    backdrop-filter: blur(22px) saturate(1.25);
    -webkit-backdrop-filter: blur(22px) saturate(1.25);
    overflow: hidden;
}
html.light-mode #folderModal .folder-modal {
    background: rgba(255, 255, 255, 0.42);
    border-color: rgba(15, 23, 42, 0.1);
    box-shadow:
        0 24px 64px rgba(15, 23, 42, 0.14),
        0 0 0 1px rgba(255, 255, 255, 0.5) inset;
}
.folder-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 22px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, transparent 100%);
}
html.light-mode .folder-modal-header {
    border-bottom-color: rgba(15, 23, 42, 0.08);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.35) 0%, transparent 100%);
}
.folder-modal-title-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}
.folder-modal-title {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.folder-modal-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.18s, border-color 0.18s;
}
html.light-mode .folder-modal-back {
    border-color: rgba(15, 23, 42, 0.1);
    background: rgba(255, 255, 255, 0.45);
}
.folder-modal-back:hover {
    border-color: var(--primary);
    background: var(--primary-glow);
}
.folder-modal-back[hidden] {
    display: none !important;
}
.folder-modal-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-sub);
    cursor: pointer;
    flex-shrink: 0;
    transition: color 0.18s, background 0.18s, border-color 0.18s;
}
html.light-mode .folder-modal-close {
    border-color: rgba(15, 23, 42, 0.1);
    background: rgba(255, 255, 255, 0.4);
}
.folder-modal-close:hover {
    color: var(--text-main);
    border-color: var(--primary);
    background: var(--primary-glow);
}
.folder-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px 28px;
    -webkit-overflow-scrolling: touch;
    background: transparent;
}
.folder-modal-body .folder-grid {
    max-width: none;
    padding: 4px 0 8px;
}
.folder-modal-body .grid-wrapper {
    padding: 4px 0 8px;
}