/* 增强版侧边栏样式 - 优化流畅度 */
.sidebar {
    width: 256px;
    background: linear-gradient(180deg, 
        rgba(17, 24, 39, 0.95) 0%, 
        rgba(31, 41, 55, 0.95) 50%, 
        rgba(17, 24, 39, 0.95) 100%
    );
    border-right: 1px solid rgba(59, 130, 246, 0.2);
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(20px);
    box-shadow: 0 0 30px rgba(38, 87, 253, 0.1);
    /* 硬件加速优化 */
    transform: translateZ(0);
    will-change: width, transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 收缩状态 - 优化过渡 */
.sidebar.collapsed {
    width: 88px;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* 文本元素收缩优化 - 保持图标可见 */
.sidebar.collapsed .sidebar-logo-text,
.sidebar.collapsed .nav-text,
.sidebar.collapsed .sidebar-user-info {
    opacity: 0;
    transform: translateX(-15px) scale(0.8);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    pointer-events: none;
    visibility: hidden;
}

/* 正常状态的文本元素 */
.sidebar:not(.collapsed) .sidebar-logo-text,
.sidebar:not(.collapsed) .nav-text,
.sidebar:not(.collapsed) .sidebar-user-info {
    opacity: 1;
    transform: translateX(0) scale(1);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    visibility: visible;
}

/* 收缩状态下的导航链接优化 */
.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 18px 12px;
    margin: 6px 8px;
    border-radius: 16px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.1);
    min-height: 56px;
    display: flex;
    align-items: center;
}

/* 收缩状态下的图标样式 */
.sidebar.collapsed .nav-icon {
    transform: scale(1.4) translateZ(0);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: rgba(255, 255, 255, 0.9);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 500;
}

/* 收缩状态下的悬停效果 */
.sidebar.collapsed .nav-link:hover {
    background: rgba(38, 87, 253, 0.2);
    border-color: rgba(38, 87, 253, 0.4);
    transform: scale(1.08) translateZ(0);
    box-shadow: 0 8px 25px rgba(38, 87, 253, 0.4);
}

.sidebar.collapsed .nav-link:hover .nav-icon {
    color: #ffffff;
    transform: scale(1.5) translateZ(0);
    text-shadow: 0 0 10px rgba(38, 87, 253, 0.6);
}

/* 收缩状态下的活跃状态 */
.sidebar.collapsed .nav-link.active {
    background: linear-gradient(135deg, 
        rgba(38, 87, 253, 0.4), 
        rgba(59, 130, 246, 0.3)
    );
    border-color: rgba(38, 87, 253, 0.6);
    box-shadow: 0 10px 30px rgba(38, 87, 253, 0.5);
}

.sidebar.collapsed .nav-link.active .nav-icon {
    color: #ffffff;
    transform: scale(1.45) translateZ(0);
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
}

/* Header 收缩优化 */
.sidebar.collapsed .sidebar-header {
    padding: 24px 16px;
    transition: padding 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    justify-content: center;
}

.sidebar.collapsed .sidebar-logo-icon {
    transform: scale(1.2) translateZ(0);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    box-shadow: 0 6px 20px rgba(38, 87, 253, 0.4);
}

/* Footer 收缩优化 */
.sidebar.collapsed .sidebar-footer {
    padding: 20px 16px;
    transition: padding 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.sidebar.collapsed .sidebar-footer .flex {
    justify-content: center;
}

.sidebar.collapsed #logoutBtn {
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
    pointer-events: none;
}

/* 收缩按钮样式优化 */
#sidebarToggle {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #2657FD, #3B82F6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 16px rgba(38, 87, 253, 0.4);
    border: 2px solid rgba(255, 255, 255, 0.15);
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
    /* 固定定位 - 始终相对于视口，跟随侧边栏移动 */
    position: fixed;
    left: calc(256px - 12px); /* 正常状态：侧边栏宽度256px减去按钮一半 */
    top: 50%;
    transform: translateY(-50%) translateZ(0);
    z-index: 1001;
    /* 增加点击区域 */
    padding: 2px;
    /* 确保始终可见 */
    opacity: 1;
    visibility: visible;
    pointer-events: all;
}

/* 收缩状态下的按钮位置调整 */
.sidebar.collapsed #sidebarToggle {
    left: calc(88px - 12px); /* 收缩状态：收缩宽度88px减去按钮一半 */
    transition: left 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* 移动端时隐藏收缩按钮 */
@media (max-width: 1024px) {
    #sidebarToggle {
        display: none;
    }
}

#sidebarToggle:hover {
    background: linear-gradient(135deg, #1D4ED8, #2563EB);
    transform: translateY(-50%) scale(1.15) translateZ(0);
    box-shadow: 0 8px 24px rgba(38, 87, 253, 0.6);
}

#sidebarToggle:active {
    transform: translateY(-50%) scale(1.0) translateZ(0);
}

.sidebar.collapsed #sidebarToggle i {
    transform: rotate(180deg);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.sidebar:not(.collapsed) #sidebarToggle i {
    transform: rotate(0deg);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Logo区域增强 */
.sidebar-header {
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.sidebar-logo-icon {
    background: linear-gradient(135deg, #2657FD, #3B82F6, #1E40AF);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(38, 87, 253, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: transform;
}

.sidebar-logo-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: rotate(45deg);
    animation: logoShine 4s infinite;
}

@keyframes logoShine {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    50% { transform: translateX(100%) translateY(100%) rotate(45deg); }
    100% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
}

.sidebar-logo-text {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.sidebar-logo-text h1 {
    background: linear-gradient(135deg, #ffffff, #e5e7eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* 导航菜单增强 */
.nav-link {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    backdrop-filter: blur(10px);
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: transform, background-color, border-color;
    /* 确保点击区域完整 */
    display: flex;
    align-items: center;
    min-height: 48px;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(38, 87, 253, 0.2), transparent);
    transition: left 0.5s ease;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover {
    color: #ffffff;
    background: rgba(38, 87, 253, 0.1);
    border-color: rgba(38, 87, 253, 0.3);
    transform: translateX(4px) translateZ(0);
    box-shadow: 0 4px 12px rgba(38, 87, 253, 0.2);
}

.nav-link.active {
    color: #ffffff;
    background: linear-gradient(135deg, 
        rgba(38, 87, 253, 0.2), 
        rgba(59, 130, 246, 0.15)
    );
    border-color: rgba(38, 87, 253, 0.4);
    box-shadow: 0 4px 20px rgba(38, 87, 253, 0.3);
}

.nav-indicator {
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #2657FD, #3B82F6);
    border-radius: 0 4px 4px 0;
    transform: scaleY(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link.active .nav-indicator {
    transform: scaleY(1);
}

.nav-link:hover .nav-indicator {
    transform: scaleY(1);
}

.nav-icon {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 20px;
    text-align: center;
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: transform;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-link:hover .nav-icon {
    transform: scale(1.1) rotate(5deg) translateZ(0);
    color: #2657FD;
}

.nav-text {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    font-weight: 500;
    margin-left: 12px;
}

/* 用户信息区域增强 */
.sidebar-footer {
    background: linear-gradient(135deg, 
        rgba(31, 41, 55, 0.8), 
        rgba(17, 24, 39, 0.9)
    );
    border-top: 1px solid rgba(59, 130, 246, 0.2);
    position: relative;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.sidebar-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(38, 87, 253, 0.5), 
        transparent
    );
}

.sidebar-user-info {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    #sidebarOverlay {
        display: block !important;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    #sidebarOverlay.active {
        opacity: 1;
        visibility: visible;
    }
}

/* 主内容区域调整 - 优化过渡 */
#mainContainer {
    margin-left: 256px;
    transition: margin-left 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: margin-left;
}

.sidebar.collapsed ~ #mainContainer {
    margin-left: 88px;
}

@media (max-width: 1024px) {
    #mainContainer {
        margin-left: 0;
        transition: none;
    }
}

/* 动画增强 */
.nav-item {
    animation: slideInLeft 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation-fill-mode: both;
}

.nav-item:nth-child(1) { animation-delay: 0.05s; }
.nav-item:nth-child(2) { animation-delay: 0.1s; }
.nav-item:nth-child(3) { animation-delay: 0.15s; }
.nav-item:nth-child(4) { animation-delay: 0.2s; }
.nav-item:nth-child(5) { animation-delay: 0.25s; }
.nav-item:nth-child(6) { animation-delay: 0.3s; }
.nav-item:nth-child(7) { animation-delay: 0.35s; }
.nav-item:nth-child(8) { animation-delay: 0.4s; }

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px) translateZ(0);
    }
    to {
        opacity: 1;
        transform: translateX(0) translateZ(0);
    }
}

/* 滚动条样式 */
.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(31, 41, 55, 0.3);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(38, 87, 253, 0.5);
    border-radius: 2px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(38, 87, 253, 0.7);
}

/* 工具提示样式（收缩状态时显示） */
.nav-tooltip {
    position: fixed;
    left: 96px;
    background: linear-gradient(135deg, rgba(17, 24, 39, 0.95), rgba(31, 41, 55, 0.95));
    color: white;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-50%) translateX(-5px) translateZ(0);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(38, 87, 253, 0.4);
    backdrop-filter: blur(15px);
    z-index: 1001;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(38, 87, 253, 0.2);
    pointer-events: none;
    /* 硬件加速 */
    will-change: transform, opacity;
}

.nav-tooltip.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0) translateZ(0);
}

.nav-tooltip::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    border: 8px solid transparent;
    border-right-color: rgba(17, 24, 39, 0.95);
}

/* 新增特效 */
.sidebar-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(38, 87, 253, 0.8), 
        transparent
    );
    animation: glow-flow 3s infinite;
}

@keyframes glow-flow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* 悬浮效果增强 */
.sidebar-logo-icon:hover {
    transform: scale(1.05) rotate(5deg) translateZ(0);
    box-shadow: 0 8px 25px rgba(38, 87, 253, 0.4);
}

.nav-link:active {
    transform: translateX(2px) scale(0.98) translateZ(0);
}

/* 性能优化 */
.sidebar,
.sidebar-logo-text,
.nav-text,
.sidebar-user-info,
.nav-link,
.nav-icon,
#sidebarToggle {
    /* 强制硬件加速 */
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion: reduce) {
    .sidebar,
    #mainContainer,
    .nav-tooltip,
    .sidebar-logo-text,
    .nav-text,
    .sidebar-user-info,
    .nav-link,
    .nav-icon,
    #sidebarToggle {
        transition: none !important;
        animation: none !important;
    }
}