/* ========================================
   TYILRN - Modern Educational Components
   特点：丰富动画、液态玻璃、无紫色金色、无上浮阴影动画
   ======================================== */

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 主按钮 —— 液态玻璃蓝色 */
.btn-primary {
    background: linear-gradient(180deg, rgba(59,130,246,0.90) 0%, rgba(37,99,235,0.90) 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.35),
        inset 0 -1px 0 rgba(0,0,0,0.05),
        0 1px 2px rgba(37,99,235,0.15);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.50), transparent);
    pointer-events: none;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(180deg, rgba(59,130,246,0.95) 0%, rgba(37,99,235,0.95) 100%);
    border-color: rgba(255, 255, 255, 0.50);
    transform: scale(1.02);
}

.btn-primary:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 次要按钮 —— 白色液态玻璃 */
.btn-secondary {
    background: rgba(255, 255, 255, 0.45);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow:
        inset 0 1px 1px rgba(255,255,255,0.40),
        inset 0 -1px 1px rgba(0,0,0,0.02);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.50), transparent);
    pointer-events: none;
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.70);
    border-color: rgba(255, 255, 255, 0.50);
    transform: scale(1.02);
}

.btn-secondary:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 成功按钮 */
.btn-success {
    background: linear-gradient(180deg, rgba(34,197,94,0.90) 0%, rgba(22,163,74,0.90) 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.30);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.30), 0 1px 2px rgba(22,163,74,0.15);
    position: relative;
    overflow: hidden;
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(180deg, rgba(34,197,94,0.95) 0%, rgba(22,163,74,0.95) 100%);
    border-color: rgba(255, 255, 255, 0.45);
    transform: scale(1.02);
}

.btn-success:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 危险按钮 */
.btn-danger {
    background: linear-gradient(180deg, rgba(239,68,68,0.90) 0%, rgba(220,38,38,0.90) 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.30);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.30), 0 1px 2px rgba(220,38,38,0.15);
    position: relative;
    overflow: hidden;
}

.btn-danger:hover:not(:disabled) {
    background: linear-gradient(180deg, rgba(239,68,68,0.95) 0%, rgba(220,38,38,0.95) 100%);
    border-color: rgba(255, 255, 255, 0.45);
    transform: scale(1.02);
}

.btn-danger:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 幽灵按钮 —— 透明玻璃 */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.35);
    color: var(--text-secondary);
    border-color: rgba(255, 255, 255, 0.25);
    transform: scale(1.02);
}

.btn-ghost:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 玻璃按钮 —— 用于深色背景 */
.btn-glass {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.30);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.35);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.40), transparent);
    pointer-events: none;
}

.btn-glass:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.28);
    border-color: rgba(255, 255, 255, 0.45);
    transform: scale(1.02);
}

.btn-glass:active:not(:disabled) {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* 按钮尺寸 */
.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 12px;
    border-radius: var(--border-radius-sm);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: 16px;
    border-radius: var(--border-radius);
}

.btn-block {
    width: 100%;
}

.btn-loading {
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ===== 卡片 ===== */
.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-highlight);
    overflow: hidden;
    transition: all var(--transition-fast);
    animation: scaleIn 0.3s ease forwards;
}

.card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-strong);
    transform: scale(1.005);
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    padding: var(--space-3) var(--space-5);
    border-top: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
}

/* 强玻璃卡片 —— 用于需要更高可读性 */
.card-strong {
    background: var(--glass-bg-solid);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
}

.card-strong:hover {
    background: rgba(255, 255, 255, 0.70);
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-label-required::after {
    content: ' *';
    color: var(--danger);
}

/* 输入框 —— 液态玻璃 */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: 14px;
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.40);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--glass-border-strong);
    background: rgba(255, 255, 255, 0.65);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.4), 0 0 0 3px rgba(37, 99, 235, 0.15);
    transform: scale(1.01);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: rgba(255, 255, 255, 0.20);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: rgba(220, 38, 38, 0.50);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 0 0 3px rgba(220, 38, 38, 0.10);
    animation: shake 0.4s ease-in-out;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
    margin-top: var(--space-1);
    animation: fadeIn 0.2s ease;
}

.form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* 输入框组 */
.input-group {
    display: flex;
}

.input-group .form-input {
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    border-right: none;
}

.input-group .btn {
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* 表单行 */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ===== 复选框与单选框 ===== */
.checkbox,
.radio {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.checkbox input,
.radio input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* 开关 —— 液态玻璃 */
.toggle {
    position: relative;
    width: 44px;
    height: 24px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

.toggle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    transition: all var(--transition-bounce);
    box-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.toggle.active {
    background: rgba(37, 99, 235, 0.80);
    border-color: rgba(255, 255, 255, 0.25);
}

.toggle.active::after {
    transform: translateX(20px);
}

.toggle input {
    display: none;
}

/* ===== 标签 —— 玻璃胶囊 ===== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(255, 255, 255, 0.55);
    transform: scale(1.05);
}

.tag-primary { background: rgba(37, 99, 235, 0.12); color: var(--primary-dark); border-color: rgba(37, 99, 235, 0.20); }
.tag-success { background: rgba(22, 163, 74, 0.12); color: var(--success); border-color: rgba(22, 163, 74, 0.20); }
.tag-warning { background: rgba(217, 119, 6, 0.12); color: var(--warning); border-color: rgba(217, 119, 6, 0.20); }
.tag-danger { background: rgba(220, 38, 38, 0.12); color: var(--danger); border-color: rgba(220, 38, 38, 0.20); }
.tag-info { background: rgba(8, 145, 178, 0.12); color: var(--info); border-color: rgba(8, 145, 178, 0.20); }

.tag-removable {
    padding-right: var(--space-1);
}

.tag-remove {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tag-remove:hover {
    background: rgba(0,0,0,0.08);
    transform: rotate(90deg);
}

/* ===== 徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 9px;
    background: rgba(220, 38, 38, 0.85);
    color: white;
    backdrop-filter: blur(4px);
    transition: all var(--transition-fast);
}

.badge:hover {
    transform: scale(1.1);
}

.badge-dot {
    width: 8px;
    height: 8px;
    min-width: auto;
    padding: 0;
    border-radius: 50%;
}

/* ===== 头像 ===== */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    overflow: hidden;
    background: rgba(37, 99, 235, 0.15);
    color: var(--primary);
    font-weight: 600;
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, 0.40);
    transition: all var(--transition-fast);
}

.avatar:hover {
    transform: scale(1.08);
    border-color: rgba(255, 255, 255, 0.60);
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-xs { width: 24px; height: 24px; font-size: 10px; }
.avatar-sm { width: 32px; height: 32px; font-size: 12px; }
.avatar-md { width: 40px; height: 40px; font-size: 14px; }
.avatar-lg { width: 56px; height: 56px; font-size: 18px; }
.avatar-xl { width: 80px; height: 80px; font-size: 24px; }

.avatar-group {
    display: flex;
    align-items: center;
}

.avatar-group .avatar {
    border: 2px solid rgba(255, 255, 255, 0.50);
    margin-left: -8px;
    transition: all var(--transition-fast);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

.avatar-group .avatar:hover {
    z-index: 1;
    transform: scale(1.15);
}

/* ===== 弹窗/模态框 —— 强液态玻璃 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--glass-bg-solid);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-highlight);
    max-width: 520px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: scaleInBounce 0.3s ease;
}

.modal-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ===== 提示消息 —— 玻璃 Toast ===== */
.toast-container {
    position: fixed;
    top: 80px;
    right: var(--space-4);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--border-radius);
    background: var(--glass-bg-solid);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-highlight);
    border-left: 4px solid var(--primary);
    min-width: 300px;
    max-width: 400px;
    animation: slideInRight 0.3s ease;
    transition: all var(--transition-fast);
}

.toast:hover {
    transform: scale(1.01);
}

.toast-success { border-left-color: var(--success); }
.toast-warning { border-left-color: var(--warning); }
.toast-danger { border-left-color: var(--danger); }
.toast-info { border-left-color: var(--info); }

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: var(--space-1);
}

.toast-message {
    font-size: 13px;
    color: var(--text-secondary);
}

.toast-close {
    flex-shrink: 0;
    color: var(--text-tertiary);
    padding: var(--space-1);
    transition: all var(--transition-fast);
}

.toast-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

/* ===== 确认框 ===== */
.confirm-box {
    text-align: center;
    padding: var(--space-4);
}

.confirm-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(217, 119, 6, 0.15);
    color: var(--warning);
    backdrop-filter: blur(4px);
    animation: scaleInBounce 0.4s ease;
}

.confirm-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.confirm-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.pagination-item,
.pagination-prev,
.pagination-next {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-2);
    border-radius: var(--border-radius);
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.35);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
    cursor: pointer;
    backdrop-filter: blur(4px);
}

.pagination-item:hover,
.pagination-prev:hover,
.pagination-next:hover {
    background: rgba(255, 255, 255, 0.60);
    border-color: var(--glass-border-strong);
    color: var(--text-secondary);
    transform: scale(1.08);
}

.pagination-item.active {
    background: rgba(37, 99, 235, 0.85);
    color: white;
    border-color: rgba(255, 255, 255, 0.30);
    animation: warmPulse 2s ease-in-out infinite;
}

.pagination-item.disabled,
.pagination-prev.disabled,
.pagination-next.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== 下拉菜单 —— 强玻璃 ===== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: auto;
    min-width: 180px;
    background: var(--glass-bg-solid);
    backdrop-filter: var(--glass-blur-heavy);
    -webkit-backdrop-filter: var(--glass-blur-heavy);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-highlight), 0 8px 24px rgba(0,0,0,0.18);
    z-index: 100;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.92) translateY(-8px);
    transition:
        opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.32s cubic-bezier(0.34, 1.56, 0.64, 1),
        visibility 0s linear 0.2s;
    transform-origin: top left;
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: scale(1) translateY(0);
    transition:
        opacity 0.32s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1),
        visibility 0s linear 0s;
}

/* 菜单项依次淡入 */
.dropdown.open .dropdown-item {
    animation: ddItemIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.dropdown.open .dropdown-item:nth-child(1) { animation-delay: 0.04s; }
.dropdown.open .dropdown-item:nth-child(2) { animation-delay: 0.08s; }
.dropdown.open .dropdown-item:nth-child(3) { animation-delay: 0.12s; }
.dropdown.open .dropdown-item:nth-child(4) { animation-delay: 0.16s; }
.dropdown.open .dropdown-item:nth-child(5) { animation-delay: 0.20s; }
.dropdown.open .dropdown-item:nth-child(6) { animation-delay: 0.24s; }
.dropdown.open .dropdown-item:nth-child(7) { animation-delay: 0.28s; }
.dropdown.open .dropdown-item:nth-child(8) { animation-delay: 0.32s; }
@keyframes ddItemIn {
    from { opacity: 0; transform: translateX(8px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* 触发按钮 hover 时的过渡反馈 */
.dropdown-toggle {
    transition:
        background 0.25s cubic-bezier(0.16, 1, 0.3, 1),
        color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.dropdown > .dropdown-toggle:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.12);
}
.dropdown > .dropdown-toggle:active {
    transform: translateY(0) scale(0.97);
    transition-duration: 0.08s;
}
.dropdown.open > .dropdown-toggle {
    background: rgba(37, 99, 235, 0.12);
    color: var(--primary);
    box-shadow: 0 4px 18px rgba(37, 99, 235, 0.18);
}
.dropdown > .dropdown-toggle svg:last-child {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.dropdown.open > .dropdown-toggle svg:last-child {
    transform: rotate(180deg);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    font-size: 13px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.50);
    color: var(--text-secondary);
    padding-left: calc(var(--space-4) + 4px);
}

.dropdown-item.danger {
    color: var(--danger);
}

.dropdown-item.danger:hover {
    background: rgba(220, 38, 38, 0.08);
}

.dropdown-divider {
    height: 1px;
    background: var(--glass-border);
    margin: var(--space-1) 0;
}

/* ===== 标签页 ===== */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--glass-border);
    gap: var(--space-1);
}

.tab {
    padding: var(--space-3) var(--space-4);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all var(--transition-fast);
    cursor: pointer;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    position: relative;
}

.tab::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.20);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
}

.tab.active {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.06);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
}

.tab.active::after {
    width: 60%;
}

.tab-panel {
    display: none;
    padding-top: var(--space-4);
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* ===== 折叠面板 ===== */
.accordion {
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
}

.accordion-item {
    border-bottom: 1px solid var(--glass-border);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.accordion-header:hover {
    background: rgba(255, 255, 255, 0.25);
}

.accordion-icon {
    transition: transform var(--transition-fast);
}

.accordion-item.open .accordion-icon {
    transform: rotate(180deg);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.accordion-item.open .accordion-body {
    max-height: 1000px;
}

.accordion-content {
    padding: 0 var(--space-4) var(--space-4);
}

/* ===== 加载状态 ===== */
.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.60);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(0, 0, 0, 0.08);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

/* ===== 空状态 ===== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-6);
    text-align: center;
    animation: scaleIn 0.4s ease;
}

.empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: var(--space-4);
    color: var(--gray-300);
    transition: all var(--transition-fast);
}

.empty-state:hover .empty-icon {
    transform: scale(1.05);
    color: var(--gray-400);
}

.empty-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.empty-desc {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
    max-width: 400px;
}

/* ===== 统计卡片 —— 液态玻璃 ===== */
.stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-highlight);
    padding: var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-strong);
    transform: scale(1.02);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.30);
    transition: all var(--transition-bounce);
}

.stat-card:hover .stat-icon {
    transform: rotate(-5deg) scale(1.1);
}

.stat-icon.blue { background: rgba(37, 99, 235, 0.15); color: var(--primary); }
.stat-icon.green { background: rgba(22, 163, 74, 0.15); color: var(--success); }
.stat-icon.orange { background: rgba(217, 119, 6, 0.15); color: var(--warning); }
.stat-icon.red { background: rgba(220, 38, 38, 0.15); color: var(--danger); }

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    transition: all var(--transition-fast);
}

.stat-card:hover .stat-value {
    transform: scale(1.05);
}

.stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* ===== 时间线 ===== */
.timeline {
    position: relative;
    padding-left: var(--space-6);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: rgba(0, 0, 0, 0.08);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-5);
}

.timeline-dot {
    position: absolute;
    left: -25px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.50);
    transition: all var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.15);
}

.timeline-dot.success { border-color: var(--success); }
.timeline-dot.warning { border-color: var(--warning); }
.timeline-dot.danger { border-color: var(--danger); }

.timeline-content {
    font-size: 14px;
}

.timeline-time {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

/* ===== 步骤条 ===== */
.steps {
    display: flex;
    align-items: center;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    width: 100%;
    height: 2px;
    background: rgba(0, 0, 0, 0.08);
    transition: all var(--transition-slow);
}

.step.active:not(:last-child)::after,
.step.done:not(:last-child)::after {
    background: linear-gradient(90deg, var(--primary), rgba(59,130,246,0.5));
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-tertiary);
    border: 2px solid rgba(0, 0, 0, 0.08);
    position: relative;
    z-index: 1;
    transition: all var(--transition-fast);
}

.step.active .step-number {
    background: rgba(37, 99, 235, 0.85);
    color: white;
    border-color: rgba(255, 255, 255, 0.30);
    animation: warmPulse 2s ease-in-out infinite;
}

.step.done .step-number {
    background: rgba(37, 99, 235, 0.15);
    color: var(--primary);
    border-color: rgba(37, 99, 235, 0.30);
}

.step-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.step.active .step-title,
.step.done .step-title {
    color: var(--text-primary);
}

/* ===== 进度条 ===== */
.progress {
    height: 8px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.30);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, rgba(37,99,235,0.85), rgba(59,130,246,0.85));
    border-radius: 4px;
    transition: width var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: glassSweep 2s ease-in-out infinite;
}

.progress-bar.success { background: linear-gradient(90deg, rgba(22,163,74,0.85), rgba(34,197,94,0.85)); }
.progress-bar.warning { background: linear-gradient(90deg, rgba(217,119,6,0.85), rgba(245,158,11,0.85)); }
.progress-bar.danger { background: linear-gradient(90deg, rgba(220,38,38,0.85), rgba(239,68,68,0.85)); }

/* ===== 搜索框 —— 玻璃 ===== */
.search-box {
    position: relative;
}

.search-box input {
    padding-left: 36px;
    width: 100%;
}

.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.search-box input:focus + .search-icon,
.search-box input:focus ~ .search-icon {
    color: var(--primary);
}

/* ===== 富文本编辑器工具栏 ===== */
.editor-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    padding: var(--space-2);
    background: rgba(255, 255, 255, 0.30);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    border-bottom: none;
}

.editor-toolbar-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.editor-toolbar-btn:hover,
.editor-toolbar-btn.active {
    background: rgba(255, 255, 255, 0.60);
    color: var(--primary);
    transform: scale(1.1);
}

.editor-content {
    border: 1px solid var(--glass-border);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    padding: var(--space-3);
    min-height: 200px;
    background: rgba(255, 255, 255, 0.50);
    backdrop-filter: blur(10px);
}

/* ===== 树形控件 ===== */
.tree-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.tree-item:hover {
    background: rgba(255, 255, 255, 0.30);
    padding-left: calc(var(--space-3) + 4px);
}

.tree-toggle {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast);
}

.tree-toggle.open {
    transform: rotate(90deg);
}

.tree-children {
    padding-left: var(--space-6);
}

/* ===== 拖拽排序 ===== */
.sortable-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: rgba(255, 255, 255, 0.30);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    cursor: grab;
    transition: all var(--transition-fast);
}

.sortable-item:hover {
    background: rgba(255, 255, 255, 0.50);
    border-color: var(--glass-border-strong);
    transform: scale(1.01);
}

.sortable-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
    transform: scale(1.02);
}

.sortable-handle {
    color: var(--text-tertiary);
    cursor: grab;
    transition: all var(--transition-fast);
}

.sortable-handle:hover {
    color: var(--text-secondary);
    transform: scale(1.2);
}

/* ===== 响应式表格 ===== */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.20);
    backdrop-filter: blur(10px);
}

.data-table {
    width: 100%;
    font-size: 13px;
}

.data-table th,
.data-table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition-fast);
}

.data-table th {
    background: rgba(255, 255, 255, 0.30);
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    backdrop-filter: blur(4px);
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.20);
}

.data-table tr:last-child td {
    border-bottom: none;
}

@media (max-width: 768px) {
    .data-table th,
    .data-table td {
        padding: var(--space-2) var(--space-3);
    }
}

/* ===== 分隔线 ===== */
.divider {
    height: 1px;
    background: var(--glass-border);
    margin: var(--space-4) 0;
}

.divider-vertical {
    width: 1px;
    background: var(--glass-border);
    margin: 0 var(--space-4);
    align-self: stretch;
}

/* ===== 星级评分 ===== */
.star-rating {
    display: inline-flex;
    align-items: center;
    gap: 2px;
}

.star-rating svg {
    width: 16px;
    height: 16px;
    color: var(--gray-300);
    transition: all var(--transition-fast);
}

.star-rating svg.filled {
    color: #f59e0b;
}

.star-rating svg:hover {
    transform: scale(1.2);
}

/* ===== 图标按钮组 ===== */
.icon-btn-group {
    display: inline-flex;
    background: rgba(255, 255, 255, 0.30);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.icon-btn-group button {
    padding: var(--space-2) var(--space-3);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn-group button:hover {
    background: rgba(255, 255, 255, 0.50);
    color: var(--text-primary);
    transform: scale(1.05);
}

.icon-btn-group button:active {
    transform: scale(0.95);
}

.icon-btn-group button:not(:last-child) {
    border-right: 1px solid var(--glass-border);
}