.sidebar-contnet {
    position: absolute;
    left: 0;
    top: 4rem;
    z-index: 40;
    width: 98px;
    height: calc(100vh - 4rem);
    flex-shrink: 0;
}

.sidebar-contents {
    width: 98px;
    min-height: calc(100% - 20px);
    background: rgba(3, 38, 80, 0.8);
    border: 1px solid;
    border-color: rgba(43, 143, 254, 0.6);
    border-radius: 4px;
    backdrop-filter: blur(2px);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 10px;
    position: relative;
    height: calc(100% - 20px);
    box-sizing: border-box;
    transform: translate(10px, 10px);
}

.item-nav-group {
    width: 100%;
}

.item-nav-wrap {
    position: relative;
    width: 100%;
}

.item-nav-group:first-child .item-nav {
    margin-top: 0;
}

.item-nav {
    width: 100%;
    height: 75px;
    margin-top: 13px;
    font-family: Noto Sans S Chinese;
    font-weight: 500;
    color: #fff;
    font-size: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    background: #000c1c26;
    border: 1px solid;
    border-color: #55a6fe33;
    box-shadow: 0 0 20px #00b9ff26 inset;
    position: relative;
}

.item-nav:hover,
.item-nav-active,
.item-nav-hovered {
    color: #ffffff;
    background: linear-gradient(134.25deg,
            rgba(0, 98, 217, 0.59) 2.28%,
            rgba(0, 98, 217, 0.3) 99.59%) !important;
    background-size: cover;
    border: 1px solid;
    border-color: rgba(255, 255, 255, 0.2);
    position: relative;
}

.item-nav:hover::before,
.item-nav-active::before,
.item-nav-hovered::before {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 10px solid rgba(0, 98, 217, 0.45);
    pointer-events: none;
}

.item-nav:hover::after,
.item-nav-active::after,
.item-nav-hovered::after {
    content: '';
    position: absolute;
    left: 0;
    top: 29px;
    width: 77px;
    height: 45px;
    background: url('../assets/icon/nav-line-logo.svg') no-repeat;
    background-size: cover;
}

.item-nav__label {
    display: block;
    width: 3em;
    margin: 0 auto;
    padding-left: 6px;
    box-sizing: border-box;
    letter-spacing: 6px;
    word-break: break-all;
}

.item-nav-content {
    width: 155px;
    height: calc(100vh - 4rem - 20px);
    min-height: calc(100vh - 4rem - 20px);
    background: rgba(3, 38, 80, 0.8);
    border: 1px solid;
    border-color: rgba(43, 143, 254, 0.6);
    border-radius: 4px;
    backdrop-filter: blur(2px);
    position: absolute;
    left: 108px;
    top: 0;
    z-index: 1000;
    padding: 14px 13px 18px 16px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.item-nav-content::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 0;
    width: 30px;
    height: 100%;
}

.item-nav-hover-bridge {
    position: absolute;
    right: -30px;
    top: 0;
    width: 30px;
    height: 100%;
    z-index: 999;
}

.item-nav-content--visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.sidebar-flyout-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: relative;
}

.sidebar-flyout-list--level-1,
.sidebar-flyout-list--level-2,
.sidebar-flyout-list--level-3 {
    margin-left: 19px;
    padding-left: 14px;
}

.sidebar-flyout-node {
    position: relative;
}

.sidebar-flyout-node--has-children.sidebar-flyout-node--expanded>.sidebar-flyout-list::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 1px;
    height: 100%;
    background: rgba(43, 143, 254, 0.22);
}

.sidebar-flyout-item {
    width: 100%;
    min-height: 34px;
    display: flex;
    align-items: center;
    gap: 9px;
    border: 0;
    background: transparent;
    padding: 3px 0;
    font-family: Noto Sans S Chinese;
    font-size: 18px;
    line-height: 16px;
    font-weight: 500;
    letter-spacing: 0;
    color: rgba(255, 255, 255, 0.8);
    text-align: left;
    cursor: pointer;
    transition: color 0.2s ease, text-shadow 0.2s ease;
}

.sidebar-flyout-item:hover,
.sidebar-flyout-item--active {
    color: #48ddff;
    text-shadow: 0 0 8px rgba(72, 221, 255, 0.25);
}

.sidebar-flyout-item--leaf {
    justify-content: center;
    padding-left: 0;
}

.sidebar-flyout-list--level-1>.sidebar-flyout-node>.sidebar-flyout-item--leaf,
.sidebar-flyout-list--level-2>.sidebar-flyout-node>.sidebar-flyout-item--leaf,
.sidebar-flyout-list--level-3>.sidebar-flyout-node>.sidebar-flyout-item--leaf {
    padding-left: 0;
}

.sidebar-flyout-arrow {
    width: 9px;
    height: 9px;
    flex: 0 0 9px;
    background: url('../assets/icon/down-logo.svg') center / contain no-repeat;
    transform: rotate(-90deg);
    transition: transform 0.2s ease;
}

.sidebar-flyout-node--expanded>.sidebar-flyout-item>.sidebar-flyout-arrow {
    transform: rotate(0deg);
}

.sidebar-flyout-label {
    flex: 1;
    white-space: nowrap;
}

.sidebar-collapse-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 8px;
    cursor: pointer;
}

.sidebar-collapse-btn__icon {
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    color: #80e9ff;
}

.sidebar-collapse-btn__label {
    font-size: 14px;
    line-height: 1;
    white-space: nowrap;
}

.sidebar-collapse-btn--inline {
    width: calc(100% - 6px);
    min-height: 58px;
    margin-top: auto;
    margin-bottom: 2px;
    flex-direction: column;
    gap: 6px;
    border: 1px solid #55a6fe33;
    background: #000c1c26;
    color: rgba(255, 255, 255, 0.9);
    box-shadow: inset 0 0 16px #00b9ff1f;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.sidebar-collapse-btn--inline .sidebar-collapse-btn__label {
    font-size: 16px;
    line-height: 1.1;
}

.sidebar-collapse-btn--inline:hover {
    background: rgba(0, 98, 217, 0.3);
    border-color: rgba(255, 255, 255, 0.25);
}

.sidebar-collapse-btn--floating {
    position: fixed;
    left: 10px;
    bottom: 10px;
    z-index: 60;
    width: 36px;
    height: 36px;
    min-height: 36px;
    padding: 0 10px;
    border: 1px solid rgba(128, 233, 255, 0.35);
    background: rgba(3, 38, 80, 0.82);
    color: rgba(205, 245, 255, 0.95);
    backdrop-filter: blur(2px);
    transition: width 0.22s ease, opacity 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    overflow: hidden;
}

.sidebar-collapse-btn--floating:hover {
    width: 104px;
    background: rgba(7, 52, 110, 0.9);
    border-color: rgba(128, 233, 255, 0.65);
}

.sidebar-collapse-btn--floating .sidebar-collapse-btn__label {
    max-width: 0;
    opacity: 0;
    transform: translateX(-4px);
    transition: max-width 0.22s ease, opacity 0.16s ease, transform 0.22s ease;
}

.sidebar-collapse-btn--floating:hover .sidebar-collapse-btn__label {
    max-width: 64px;
    opacity: 1;
    transform: translateX(0);
}