/* ==========================================================================
   FWQZL验证系统 - 组件样式 (components.css)
   一次性完整编写，包含所有通用组件样式
   注意：此文件完成后不再修改
   ========================================================================== */

/* ==================== 按钮组件 ==================== */
.btn {
    display: inline-block;
    font-weight: var(--font-weight-medium);
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: var(--border-width-thin) solid transparent;
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-md);
    line-height: var(--line-height-base);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(74, 107, 255, 0.25);
}

.btn:disabled,
.btn.disabled {
    opacity: 0.65;
    pointer-events: none;
    cursor: not-allowed;
}

/* 按钮大小 */
.btn-xs {
    padding: 0.25rem 0.5rem;
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
}

.btn-md {
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-md);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-lg);
}

.btn-xl {
    padding: 1rem 2rem;
    font-size: var(--font-size-xl);
    border-radius: var(--border-radius-lg);
}

/* 按钮变体 */
.btn-primary {
    color: var(--white);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    color: var(--white);
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    box-shadow: 0 0 0 0.25rem rgba(74, 107, 255, 0.5);
}

.btn-secondary {
    color: var(--white);
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.btn-secondary:hover {
    color: var(--white);
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    color: var(--white);
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-success:hover {
    color: var(--white);
    background-color: var(--success-dark);
    border-color: var(--success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    color: var(--white);
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-danger:hover {
    color: var(--white);
    background-color: var(--danger-dark);
    border-color: var(--danger-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    color: var(--gray-900);
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-warning:hover {
    color: var(--gray-900);
    background-color: var(--warning-dark);
    border-color: var(--warning-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-info {
    color: var(--white);
    background-color: var(--info-color);
    border-color: var(--info-color);
}

.btn-info:hover {
    color: var(--white);
    background-color: var(--info-dark);
    border-color: var(--info-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-light {
    color: var(--gray-900);
    background-color: var(--gray-100);
    border-color: var(--gray-300);
}

.btn-light:hover {
    color: var(--gray-900);
    background-color: var(--gray-200);
    border-color: var(--gray-400);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-dark {
    color: var(--white);
    background-color: var(--gray-900);
    border-color: var(--gray-900);
}

.btn-dark:hover {
    color: var(--white);
    background-color: var(--gray-800);
    border-color: var(--gray-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 轮廓按钮 */
.btn-outline-primary {
    color: var(--primary-color);
    background-color: transparent;
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    color: var(--white);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-secondary {
    color: var(--secondary-color);
    background-color: transparent;
    border-color: var(--secondary-color);
}

.btn-outline-secondary:hover {
    color: var(--white);
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-success {
    color: var(--success-color);
    background-color: transparent;
    border-color: var(--success-color);
}

.btn-outline-success:hover {
    color: var(--white);
    background-color: var(--success-color);
    border-color: var(--success-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-danger {
    color: var(--danger-color);
    background-color: transparent;
    border-color: var(--danger-color);
}

.btn-outline-danger:hover {
    color: var(--white);
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-warning {
    color: var(--warning-color);
    background-color: transparent;
    border-color: var(--warning-color);
}

.btn-outline-warning:hover {
    color: var(--gray-900);
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-info {
    color: var(--info-color);
    background-color: transparent;
    border-color: var(--info-color);
}

.btn-outline-info:hover {
    color: var(--white);
    background-color: var(--info-color);
    border-color: var(--info-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-light {
    color: var(--gray-700);
    background-color: transparent;
    border-color: var(--gray-300);
}

.btn-outline-light:hover {
    color: var(--gray-900);
    background-color: var(--gray-200);
    border-color: var(--gray-400);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-outline-dark {
    color: var(--gray-900);
    background-color: transparent;
    border-color: var(--gray-900);
}

.btn-outline-dark:hover {
    color: var(--white);
    background-color: var(--gray-900);
    border-color: var(--gray-900);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 幽灵按钮 */
.btn-ghost {
    background-color: transparent;
    border-color: transparent;
    color: var(--primary-color);
}

.btn-ghost:hover {
    background-color: var(--primary-lighter);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-ghost-primary:hover {
    background-color: rgba(74, 107, 255, 0.1);
}

.btn-ghost-danger:hover {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-dark);
}

.btn-ghost-success:hover {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-dark);
}

/* 链接按钮 */
.btn-link {
    font-weight: var(--font-weight-normal);
    color: var(--primary-color);
    text-decoration: none;
    background-color: transparent;
    border: none;
    padding: 0;
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
    background-color: transparent;
    transform: none;
    box-shadow: none;
}

/* 图标按钮 */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--border-radius-circle);
}

.btn-icon i,
.btn-icon svg {
    margin: 0;
    font-size: 1.25rem;
}

.btn-icon.btn-sm {
    width: 2rem;
    height: 2rem;
    padding: 0.375rem;
}

.btn-icon.btn-sm i,
.btn-icon.btn-sm svg {
    font-size: 1rem;
}

.btn-icon.btn-lg {
    width: 3rem;
    height: 3rem;
    padding: 0.75rem;
}

.btn-icon.btn-lg i,
.btn-icon.btn-lg svg {
    font-size: 1.5rem;
}

/* 按钮组 */
.btn-group {
    position: relative;
    display: inline-flex;
    vertical-align: middle;
}

.btn-group > .btn {
    position: relative;
    flex: 1 1 auto;
}

.btn-group > .btn:hover,
.btn-group > .btn:focus,
.btn-group > .btn:active {
    z-index: 1;
}

.btn-group > .btn:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    margin-left: -1px;
}

.btn-group > .btn:not(:last-child):not(.dropdown-toggle) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.btn-group-vertical {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.btn-group-vertical > .btn {
    width: 100%;
}

.btn-group-vertical > .btn:not(:first-child) {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    margin-top: -1px;
}

.btn-group-vertical > .btn:not(:last-child) {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

/* 加载状态按钮 */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-circle);
    border-top-color: var(--white);
    animation: spin 0.8s linear infinite;
}

.btn-loading.btn-outline-primary::after {
    border: 2px solid rgba(74, 107, 255, 0.3);
    border-top-color: var(--primary-color);
}

.btn-loading.btn-outline-secondary::after {
    border: 2px solid rgba(108, 117, 125, 0.3);
    border-top-color: var(--secondary-color);
}

.btn-loading.btn-outline-danger::after {
    border: 2px solid rgba(220, 53, 69, 0.3);
    border-top-color: var(--danger-color);
}

/* 按钮涟漪效果 */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.btn-ripple:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    20% {
        transform: scale(25, 25);
        opacity: 0.3;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

/* ==================== 表单组件 ==================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
}

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

.form-control {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--gray-900);
    background-color: var(--white);
    background-clip: padding-box;
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    color: var(--gray-900);
    background-color: var(--white);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(74, 107, 255, 0.25);
}

.form-control::placeholder {
    color: var(--gray-500);
    opacity: 1;
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--gray-100);
    opacity: 1;
}

.form-control-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
}

.form-control-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-lg);
}

/* 表单验证状态 */
.form-control.is-valid {
    border-color: var(--success-color);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-valid:focus {
    border-color: var(--success-color);
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-invalid:focus {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.valid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: var(--font-size-sm);
    color: var(--success-color);
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: var(--font-size-sm);
    color: var(--danger-color);
}

.is-valid ~ .valid-feedback,
.is-invalid ~ .invalid-feedback {
    display: block;
}

/* 表单输入组 */
.input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    width: 100%;
}

.input-group > .form-control {
    position: relative;
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
}

.input-group > .form-control:focus {
    z-index: 3;
}

.input-group-prepend,
.input-group-append {
    display: flex;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0.625rem 0.875rem;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--gray-700);
    text-align: center;
    white-space: nowrap;
    background-color: var(--gray-100);
    border: var(--border-width-thin) solid var(--border-color-light);
}

.input-group-prepend .input-group-text {
    border-right: 0;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-append .input-group-text {
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group > .form-control:not(:last-child),
.input-group > .custom-select:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group > .form-control:not(:first-child),
.input-group > .custom-select:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* 自定义选择框 */
.custom-select {
    display: inline-block;
    width: 100%;
    height: calc(1.5em + 1.25rem);
    padding: 0.625rem 2rem 0.625rem 0.875rem;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--gray-900);
    vertical-align: middle;
    background: var(--white) url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='4' height='5' viewBox='0 0 4 5'%3e%3cpath fill='%23343a40' d='M2 0L0 2h4zm0 5L0 3h4z'/%3e%3c/svg%3e") no-repeat right 0.875rem center/8px 10px;
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-md);
    appearance: none;
}

.custom-select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(74, 107, 255, 0.25);
}

.custom-select:focus::-ms-value {
    color: var(--gray-900);
    background-color: var(--white);
}

.custom-select:disabled {
    color: var(--gray-600);
    background-color: var(--gray-100);
}

.custom-select-sm {
    height: calc(1.5em + 0.75rem);
    padding-top: 0.375rem;
    padding-bottom: 0.375rem;
    padding-left: 0.75rem;
    font-size: var(--font-size-sm);
}

.custom-select-lg {
    height: calc(1.5em + 1.5rem);
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    padding-left: 1.5rem;
    font-size: var(--font-size-lg);
}

/* 复选框和单选框组 */
.form-check {
    position: relative;
    display: block;
    padding-left: 1.5rem;
}

.form-check-input {
    position: absolute;
    margin-top: 0.3rem;
    margin-left: -1.5rem;
}

.form-check-input:disabled ~ .form-check-label {
    color: var(--gray-600);
}

.form-check-label {
    margin-bottom: 0;
    cursor: pointer;
}

.form-check-inline {
    display: inline-flex;
    align-items: center;
    padding-left: 0;
    margin-right: var(--spacing-lg);
}

.form-check-inline .form-check-input {
    position: static;
    margin-top: 0;
    margin-right: 0.3125rem;
    margin-left: 0;
}

/* 表单行 */
.form-row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -5px;
    margin-left: -5px;
}

.form-row > .col {
    padding-right: 5px;
    padding-left: 5px;
}

/* 浮动标签 */
.form-floating {
    position: relative;
}

.form-floating > .form-control {
    height: calc(3.5rem + 2px);
    padding: 1rem 0.75rem;
}

.form-floating > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.75rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity 0.1s ease-in-out, transform 0.1s ease-in-out;
}

.form-floating > .form-control::placeholder {
    color: transparent;
}

.form-floating > .form-control:focus,
.form-floating > .form-control:not(:placeholder-shown) {
    padding-top: 1.625rem;
    padding-bottom: 0.625rem;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

/* ==================== 卡片组件 ==================== */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: var(--white);
    background-clip: border-box;
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-body {
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.card-title {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
}

.card-subtitle {
    margin-top: calc(-0.5 * var(--spacing-md));
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--gray-600);
}

.card-text:last-child {
    margin-bottom: 0;
}

.card-link {
    color: var(--primary-color);
}

.card-link:hover {
    color: var(--primary-dark);
}

.card-link + .card-link {
    margin-left: var(--spacing-md);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: 0;
    background-color: var(--gray-100);
    border-bottom: var(--border-width-thin) solid var(--border-color-light);
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
}

.card-header:first-child {
    border-radius: calc(var(--border-radius-lg) - 1px) calc(var(--border-radius-lg) - 1px) 0 0;
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--gray-100);
    border-top: var(--border-width-thin) solid var(--border-color-light);
    border-bottom-left-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-lg);
}

.card-footer:last-child {
    border-radius: 0 0 calc(var(--border-radius-lg) - 1px) calc(var(--border-radius-lg) - 1px);
}

.card-img-top {
    width: 100%;
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
}

.card-img-bottom {
    width: 100%;
    border-bottom-left-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-lg);
}

.card-img-overlay {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.7));
    color: var(--white);
}

/* 卡片组 */
.card-group {
    display: flex;
    flex-direction: column;
}

.card-group > .card {
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .card-group {
        flex-flow: row wrap;
    }
    
    .card-group > .card {
        flex: 1 0 0%;
        margin-bottom: 0;
    }
    
    .card-group > .card + .card {
        margin-left: 0;
        border-left: 0;
    }
}

/* 卡片变体 */
.card-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.card-primary .card-header,
.card-primary .card-footer {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: var(--white);
}

.card-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: var(--white);
}

.card-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: var(--white);
}

.card-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--gray-900);
}

.card-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
    color: var(--white);
}

.card-light {
    background-color: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-900);
}

.card-dark {
    background-color: var(--gray-900);
    border-color: var(--gray-900);
    color: var(--white);
}

/* ==================== 警告框组件 ==================== */
.alert {
    position: relative;
    padding: 1rem 1.25rem;
    margin-bottom: var(--spacing-md);
    border: var(--border-width-thin) solid transparent;
    border-radius: var(--border-radius-md);
}

.alert-heading {
    color: inherit;
    margin-top: 0;
    margin-bottom: 0.5rem;
}

.alert-link {
    font-weight: var(--font-weight-bold);
    text-decoration: underline;
}

.alert-dismissible {
    padding-right: 3.75rem;
}

.alert-dismissible .close {
    position: absolute;
    top: 0;
    right: 0;
    padding: 1rem 1.25rem;
    color: inherit;
    background: transparent;
    border: 0;
    font-size: 1.5rem;
    line-height: 1;
    opacity: 0.7;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.alert-dismissible .close:hover {
    opacity: 1;
}

/* 警告框变体 */
.alert-primary {
    color: #1936a8;
    background-color: #e8edff;
    border-color: #c8d4ff;
}

.alert-secondary {
    color: #383d41;
    background-color: #e2e3e5;
    border-color: #d6d8db;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeaa7;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

.alert-light {
    color: #818182;
    background-color: #fefefe;
    border-color: #fdfdfe;
}

.alert-dark {
    color: #1b1e21;
    background-color: #d6d8d9;
    border-color: #c6c8ca;
}

/* 带图标的警告框 */
.alert-with-icon {
    display: flex;
    align-items: flex-start;
}

.alert-icon {
    flex-shrink: 0;
    margin-right: 0.75rem;
    font-size: 1.25rem;
    line-height: 1;
}

.alert-content {
    flex: 1;
}

/* ==================== 徽章组件 ==================== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius-pill);
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.badge:empty {
    display: none;
}

/* 徽章变体 */
.badge-primary {
    color: var(--white);
    background-color: var(--primary-color);
}

.badge-secondary {
    color: var(--white);
    background-color: var(--secondary-color);
}

.badge-success {
    color: var(--white);
    background-color: var(--success-color);
}

.badge-danger {
    color: var(--white);
    background-color: var(--danger-color);
}

.badge-warning {
    color: var(--gray-900);
    background-color: var(--warning-color);
}

.badge-info {
    color: var(--white);
    background-color: var(--info-color);
}

.badge-light {
    color: var(--gray-900);
    background-color: var(--gray-200);
}

.badge-dark {
    color: var(--white);
    background-color: var(--gray-900);
}

/* 轮廓徽章 */
.badge-outline-primary {
    color: var(--primary-color);
    background-color: transparent;
    border: 1px solid var(--primary-color);
}

.badge-outline-secondary {
    color: var(--secondary-color);
    background-color: transparent;
    border: 1px solid var(--secondary-color);
}

.badge-outline-success {
    color: var(--success-color);
    background-color: transparent;
    border: 1px solid var(--success-color);
}

.badge-outline-danger {
    color: var(--danger-color);
    background-color: transparent;
    border: 1px solid var(--danger-color);
}

.badge-outline-warning {
    color: var(--warning-color);
    background-color: transparent;
    border: 1px solid var(--warning-color);
}

.badge-outline-info {
    color: var(--info-color);
    background-color: transparent;
    border: 1px solid var(--info-color);
}

.badge-outline-light {
    color: var(--gray-600);
    background-color: transparent;
    border: 1px solid var(--gray-300);
}

.badge-outline-dark {
    color: var(--gray-900);
    background-color: transparent;
    border: 1px solid var(--gray-900);
}

/* 徽章大小 */
.badge-sm {
    padding: 0.125rem 0.375rem;
    font-size: 0.65rem;
}

.badge-lg {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-sm);
}

/* 徽章位置 */
.badge-pill {
    border-radius: var(--border-radius-pill);
}

.badge-square {
    border-radius: var(--border-radius-sm);
}

/* 角标 */
.badge-corner {
    position: absolute;
    top: -8px;
    right: -8px;
    z-index: 1;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
}

/* ==================== 面包屑导航 ==================== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
    margin-bottom: var(--spacing-md);
    list-style: none;
    background-color: var(--gray-100);
    border-radius: var(--border-radius-md);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
}

.breadcrumb-item + .breadcrumb-item {
    padding-left: 0.5rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    display: inline-block;
    padding-right: 0.5rem;
    color: var(--gray-600);
    content: "/";
}

.breadcrumb-item.active {
    color: var(--gray-600);
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ==================== 分页组件 ==================== */
.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
    border-radius: var(--border-radius-md);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.page-item {
    margin: 0 2px;
}

.page-link {
    position: relative;
    display: block;
    padding: 0.5rem 0.75rem;
    margin-left: -1px;
    line-height: 1.25;
    color: var(--primary-color);
    background-color: var(--white);
    border: var(--border-width-thin) solid var(--border-color-light);
    text-decoration: none;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.page-link:hover {
    z-index: 2;
    color: var(--primary-dark);
    background-color: var(--gray-100);
    border-color: var(--border-color-light);
}

.page-link:focus {
    z-index: 3;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(74, 107, 255, 0.25);
}

.page-item:first-child .page-link {
    margin-left: 0;
    border-top-left-radius: var(--border-radius-md);
    border-bottom-left-radius: var(--border-radius-md);
}

.page-item:last-child .page-link {
    border-top-right-radius: var(--border-radius-md);
    border-bottom-right-radius: var(--border-radius-md);
}

.page-item.active .page-link {
    z-index: 3;
    color: var(--white);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.page-item.disabled .page-link {
    color: var(--gray-600);
    pointer-events: none;
    cursor: auto;
    background-color: var(--white);
    border-color: var(--border-color-light);
}

/* 分页大小 */
.pagination-sm .page-link {
    padding: 0.25rem 0.5rem;
    font-size: var(--font-size-sm);
}

.pagination-sm .page-item:first-child .page-link {
    border-top-left-radius: var(--border-radius-sm);
    border-bottom-left-radius: var(--border-radius-sm);
}

.pagination-sm .page-item:last-child .page-link {
    border-top-right-radius: var(--border-radius-sm);
    border-bottom-right-radius: var(--border-radius-sm);
}

.pagination-lg .page-link {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-lg);
}

.pagination-lg .page-item:first-child .page-link {
    border-top-left-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-lg);
}

.pagination-lg .page-item:last-child .page-link {
    border-top-right-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-lg);
}

/* ==================== 下拉菜单组件 ==================== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    white-space: nowrap;
}

.dropdown-toggle::after {
    display: inline-block;
    margin-left: 0.255em;
    vertical-align: 0.255em;
    content: "";
    border-top: 0.3em solid;
    border-right: 0.3em solid transparent;
    border-bottom: 0;
    border-left: 0.3em solid transparent;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-index-dropdown);
    display: none;
    min-width: 10rem;
    padding: 0.5rem 0;
    margin: 0.125rem 0 0;
    font-size: var(--font-size-md);
    color: var(--gray-900);
    text-align: left;
    list-style: none;
    background-color: var(--white);
    background-clip: padding-box;
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
}

.dropdown-menu.show {
    display: block;
    animation: fadeIn 0.2s ease-in-out;
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.5rem 1rem;
    clear: both;
    font-weight: var(--font-weight-normal);
    color: var(--gray-900);
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
    color: var(--primary-dark);
    background-color: var(--gray-100);
    text-decoration: none;
}

.dropdown-item.active,
.dropdown-item:active {
    color: var(--white);
    background-color: var(--primary-color);
}

.dropdown-item.disabled,
.dropdown-item:disabled {
    color: var(--gray-600);
    pointer-events: none;
    background-color: transparent;
}

.dropdown-divider {
    height: 0;
    margin: 0.5rem 0;
    overflow: hidden;
    border-top: 1px solid var(--border-color-light);
}

.dropdown-header {
    display: block;
    padding: 0.5rem 1rem;
    margin-bottom: 0;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    white-space: nowrap;
}

.dropdown-text {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--gray-900);
}

/* 下拉菜单方向 */
.dropdown-menu-right {
    right: 0;
    left: auto;
}

.dropdown-menu-left {
    right: auto;
    left: 0;
}

/* 下拉菜单大小 */
.dropdown-menu-sm {
    min-width: 8rem;
    padding: 0.25rem 0;
}

.dropdown-menu-sm .dropdown-item {
    padding: 0.375rem 0.75rem;
    font-size: var(--font-size-sm);
}

.dropdown-menu-lg {
    min-width: 16rem;
    padding: 0.75rem 0;
}

.dropdown-menu-lg .dropdown-item {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-lg);
}

/* ==================== 进度条组件 ==================== */
.progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    font-size: var(--font-size-xs);
    background-color: var(--gray-200);
    border-radius: var(--border-radius-pill);
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: var(--white);
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary-color);
    transition: width 0.6s ease;
}

.progress-bar-striped {
    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
}

.progress-bar-animated {
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    from {
        background-position: 1rem 0;
    }
    to {
        background-position: 0 0;
    }
}

/* 进度条变体 */
.progress-bar-primary {
    background-color: var(--primary-color);
}

.progress-bar-secondary {
    background-color: var(--secondary-color);
}

.progress-bar-success {
    background-color: var(--success-color);
}

.progress-bar-danger {
    background-color: var(--danger-color);
}

.progress-bar-warning {
    background-color: var(--warning-color);
}

.progress-bar-info {
    background-color: var(--info-color);
}

/* 进度条大小 */
.progress-sm {
    height: 0.5rem;
}

.progress-lg {
    height: 1.5rem;
    font-size: var(--font-size-sm);
}

.progress-xl {
    height: 2rem;
    font-size: var(--font-size-md);
}

/* ==================== 折叠面板组件 ==================== */
.collapse {
    display: none;
}

.collapse.show {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

.collapsing {
    position: relative;
    height: 0;
    overflow: hidden;
    transition: height 0.35s ease;
}

.accordion {
    margin-bottom: var(--spacing-lg);
}

.accordion-item {
    background-color: var(--white);
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.accordion-item:first-child {
    border-top-left-radius: var(--border-radius-md);
    border-top-right-radius: var(--border-radius-md);
}

.accordion-item:last-child {
    border-bottom-left-radius: var(--border-radius-md);
    border-bottom-right-radius: var(--border-radius-md);
}

.accordion-header {
    margin-bottom: 0;
}

.accordion-button {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 1rem 1.25rem;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    color: var(--gray-900);
    text-align: left;
    background-color: var(--white);
    border: 0;
    border-radius: 0;
    overflow-anchor: none;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out, border-radius 0.15s ease;
    cursor: pointer;
}

.accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background-color: var(--gray-50);
    box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.125);
}

.accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234a6bff'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    transform: rotate(-180deg);
}

.accordion-button::after {
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
    margin-left: auto;
    content: "";
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23212529'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-size: 1.25rem;
    transition: transform 0.2s ease-in-out;
}

.accordion-button:hover {
    z-index: 2;
}

.accordion-button:focus {
    z-index: 3;
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(74, 107, 255, 0.25);
}

.accordion-body {
    padding: 1rem 1.25rem;
}

.accordion-flush .accordion-item {
    border-right: 0;
    border-left: 0;
    border-radius: 0;
}

.accordion-flush .accordion-item:first-child {
    border-top: 0;
}

.accordion-flush .accordion-item:last-child {
    border-bottom: 0;
}

.accordion-flush .accordion-button {
    border-radius: 0;
}

/* ==================== 工具提示组件 ==================== */
.tooltip {
    position: absolute;
    z-index: var(--z-index-tooltip);
    display: block;
    margin: 0;
    font-family: var(--font-family-base);
    font-style: normal;
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    text-align: left;
    text-align: start;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    letter-spacing: normal;
    word-break: normal;
    word-spacing: normal;
    white-space: normal;
    line-break: auto;
    font-size: var(--font-size-sm);
    word-wrap: break-word;
    opacity: 0;
}

.tooltip.show {
    opacity: 0.9;
    animation: fadeIn 0.15s ease-in-out;
}

.tooltip .tooltip-arrow {
    position: absolute;
    display: block;
    width: 0.8rem;
    height: 0.4rem;
}

.tooltip .tooltip-arrow::before {
    position: absolute;
    content: "";
    border-color: transparent;
    border-style: solid;
}

.tooltip-inner {
    max-width: 200px;
    padding: 0.25rem 0.5rem;
    color: var(--white);
    text-align: center;
    background-color: var(--gray-900);
    border-radius: var(--border-radius-sm);
}

/* 工具提示方向 */
.tooltip.top {
    padding: 0.4rem 0;
}

.tooltip.top .tooltip-arrow {
    bottom: 0;
}

.tooltip.top .tooltip-arrow::before {
    top: 0;
    border-width: 0.4rem 0.4rem 0;
    border-top-color: var(--gray-900);
}

.tooltip.bottom {
    padding: 0.4rem 0;
}

.tooltip.bottom .tooltip-arrow {
    top: 0;
}

.tooltip.bottom .tooltip-arrow::before {
    bottom: 0;
    border-width: 0 0.4rem 0.4rem;
    border-bottom-color: var(--gray-900);
}

.tooltip.left {
    padding: 0 0.4rem;
}

.tooltip.left .tooltip-arrow {
    right: 0;
    width: 0.4rem;
    height: 0.8rem;
}

.tooltip.left .tooltip-arrow::before {
    left: 0;
    border-width: 0.4rem 0 0.4rem 0.4rem;
    border-left-color: var(--gray-900);
}

.tooltip.right {
    padding: 0 0.4rem;
}

.tooltip.right .tooltip-arrow {
    left: 0;
    width: 0.4rem;
    height: 0.8rem;
}

.tooltip.right .tooltip-arrow::before {
    right: 0;
    border-width: 0.4rem 0.4rem 0.4rem 0;
    border-right-color: var(--gray-900);
}

/* ==================== 弹出框组件 ==================== */
.popover {
    position: absolute;
    top: 0;
    left: 0;
    z-index: var(--z-index-popover);
    display: block;
    max-width: 276px;
    font-family: var(--font-family-base);
    font-style: normal;
    font-weight: var(--font-weight-normal);
    line-height: 1.5;
    text-align: left;
    text-align: start;
    text-decoration: none;
    text-shadow: none;
    text-transform: none;
    letter-spacing: normal;
    word-break: normal;
    word-spacing: normal;
    white-space: normal;
    line-break: auto;
    font-size: var(--font-size-sm);
    word-wrap: break-word;
    background-color: var(--white);
    background-clip: padding-box;
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity 0.15s ease-in-out;
}

.popover.show {
    opacity: 1;
}

.popover .popover-arrow {
    position: absolute;
    display: block;
    width: 1rem;
    height: 0.5rem;
}

.popover .popover-arrow::before,
.popover .popover-arrow::after {
    position: absolute;
    display: block;
    content: "";
    border-color: transparent;
    border-style: solid;
}

.popover-header {
    padding: 0.5rem 1rem;
    margin-bottom: 0;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
    background-color: var(--gray-100);
    border-bottom: var(--border-width-thin) solid var(--border-color-light);
    border-top-left-radius: calc(var(--border-radius-lg) - 1px);
    border-top-right-radius: calc(var(--border-radius-lg) - 1px);
}

.popover-header:empty {
    display: none;
}

.popover-body {
    padding: 1rem;
    color: var(--gray-900);
}

/* 弹出框方向 */
.popover.top {
    margin-bottom: 0.5rem;
}

.popover.top > .popover-arrow {
    bottom: calc(-0.5rem - 1px);
}

.popover.top > .popover-arrow::before {
    bottom: 0;
    border-width: 0.5rem 0.5rem 0;
    border-top-color: rgba(0, 0, 0, 0.25);
}

.popover.top > .popover-arrow::after {
    bottom: 1px;
    border-width: 0.5rem 0.5rem 0;
    border-top-color: var(--white);
}

.popover.bottom {
    margin-top: 0.5rem;
}

.popover.bottom > .popover-arrow {
    top: calc(-0.5rem - 1px);
}

.popover.bottom > .popover-arrow::before {
    top: 0;
    border-width: 0 0.5rem 0.5rem 0.5rem;
    border-bottom-color: rgba(0, 0, 0, 0.25);
}

.popover.bottom > .popover-arrow::after {
    top: 1px;
    border-width: 0 0.5rem 0.5rem 0.5rem;
    border-bottom-color: var(--white);
}

.popover.left {
    margin-right: 0.5rem;
}

.popover.left > .popover-arrow {
    right: calc(-0.5rem - 1px);
    width: 0.5rem;
    height: 1rem;
}

.popover.left > .popover-arrow::before {
    right: 0;
    border-width: 0.5rem 0 0.5rem 0.5rem;
    border-left-color: rgba(0, 0, 0, 0.25);
}

.popover.left > .popover-arrow::after {
    right: 1px;
    border-width: 0.5rem 0 0.5rem 0.5rem;
    border-left-color: var(--white);
}

.popover.right {
    margin-left: 0.5rem;
}

.popover.right > .popover-arrow {
    left: calc(-0.5rem - 1px);
    width: 0.5rem;
    height: 1rem;
}

.popover.right > .popover-arrow::before {
    left: 0;
    border-width: 0.5rem 0.5rem 0.5rem 0;
    border-right-color: rgba(0, 0, 0, 0.25);
}

.popover.right > .popover-arrow::after {
    left: 1px;
    border-width: 0.5rem 0.5rem 0.5rem 0;
    border-right-color: var(--white);
}

/* ==================== 标签页组件 ==================== */
.nav-tabs {
    border-bottom: var(--border-width-thin) solid var(--border-color-light);
    margin-bottom: var(--spacing-lg);
}

.nav-tabs .nav-item {
    margin-bottom: -1px;
}

.nav-tabs .nav-link {
    border: var(--border-width-thin) solid transparent;
    border-top-left-radius: var(--border-radius-md);
    border-top-right-radius: var(--border-radius-md);
    padding: 0.75rem 1.25rem;
    color: var(--gray-600);
    background-color: transparent;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.nav-tabs .nav-link:hover {
    border-color: var(--gray-200) var(--gray-200) var(--border-color-light);
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background-color: var(--white);
    border-color: var(--border-color-light) var(--border-color-light) var(--white);
}

.nav-tabs .nav-link.disabled {
    color: var(--gray-600);
    background-color: transparent;
    border-color: transparent;
}

.tab-content > .tab-pane {
    display: none;
}

.tab-content > .active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

/* 垂直标签页 */
.nav-tabs-vertical {
    flex-direction: column;
    border-right: var(--border-width-thin) solid var(--border-color-light);
    border-bottom: 0;
}

.nav-tabs-vertical .nav-link {
    border: var(--border-width-thin) solid transparent;
    border-top-left-radius: var(--border-radius-md);
    border-bottom-left-radius: var(--border-radius-md);
    margin-right: -1px;
}

.nav-tabs-vertical .nav-link.active {
    border-color: var(--border-color-light) transparent var(--border-color-light) var(--white);
}

/* ==================== 列表组组件 ==================== */
.list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius-md);
}

.list-group-item {
    position: relative;
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--gray-900);
    background-color: var(--white);
    border: var(--border-width-thin) solid var(--border-color-light);
}

.list-group-item:first-child {
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
}

.list-group-item:last-child {
    border-bottom-left-radius: inherit;
    border-bottom-right-radius: inherit;
}

.list-group-item.disabled,
.list-group-item:disabled {
    color: var(--gray-600);
    pointer-events: none;
    background-color: var(--white);
}

.list-group-item.active {
    z-index: 2;
    color: var(--white);
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.list-group-item + .list-group-item {
    border-top-width: 0;
}

.list-group-item + .list-group-item.active {
    margin-top: -1px;
    border-top-width: var(--border-width-thin);
}

/* 列表组变体 */
.list-group-item-primary {
    color: #1936a8;
    background-color: #e8edff;
}

.list-group-item-primary.list-group-item-action:hover,
.list-group-item-primary.list-group-item-action:focus {
    color: #1936a8;
    background-color: #d2daff;
}

.list-group-item-primary.list-group-item-action.active {
    color: var(--white);
    background-color: #1936a8;
    border-color: #1936a8;
}

.list-group-item-secondary {
    color: #383d41;
    background-color: #e2e3e5;
}

.list-group-item-success {
    color: #155724;
    background-color: #d4edda;
}

.list-group-item-danger {
    color: #721c24;
    background-color: #f8d7da;
}

.list-group-item-warning {
    color: #856404;
    background-color: #fff3cd;
}

.list-group-item-info {
    color: #0c5460;
    background-color: #d1ecf1;
}

.list-group-item-light {
    color: #818182;
    background-color: #fefefe;
}

.list-group-item-dark {
    color: #1b1e21;
    background-color: #d6d8d9;
}

/* 列表组动作 */
.list-group-item-action {
    width: 100%;
    color: var(--gray-900);
    text-align: inherit;
    cursor: pointer;
}

.list-group-item-action:hover,
.list-group-item-action:focus {
    z-index: 1;
    color: var(--gray-900);
    text-decoration: none;
    background-color: var(--gray-100);
}

.list-group-item-action:active {
    color: var(--gray-900);
    background-color: var(--gray-200);
}

/* 列表组水平 */
.list-group-horizontal {
    flex-direction: row;
}

.list-group-horizontal .list-group-item {
    margin-right: -1px;
    margin-bottom: 0;
}

.list-group-horizontal .list-group-item:first-child {
    border-top-left-radius: var(--border-radius-md);
    border-bottom-left-radius: var(--border-radius-md);
    border-top-right-radius: 0;
}

.list-group-horizontal .list-group-item:last-child {
    border-top-right-radius: var(--border-radius-md);
    border-bottom-right-radius: var(--border-radius-md);
    border-bottom-left-radius: 0;
}

/* ==================== 模态框组件 ==================== */

/* ==================== 轮播组件 ==================== */
.carousel {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.carousel-inner {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel-item {
    position: relative;
    display: none;
    float: left;
    width: 100%;
    margin-right: -100%;
    backface-visibility: hidden;
    transition: transform 0.6s ease-in-out;
}

.carousel-item.active,
.carousel-item-next,
.carousel-item-prev {
    display: block;
}

.carousel-item-next:not(.carousel-item-start),
.active.carousel-item-end {
    transform: translateX(100%);
}

.carousel-item-prev:not(.carousel-item-end),
.active.carousel-item-start {
    transform: translateX(-100%);
}

.carousel-fade .carousel-item {
    opacity: 0;
    transition-property: opacity;
    transform: none;
}

.carousel-fade .carousel-item.active,
.carousel-fade .carousel-item-next.carousel-item-start,
.carousel-fade .carousel-item-prev.carousel-item-end {
    z-index: 1;
    opacity: 1;
}

.carousel-fade .active.carousel-item-start,
.carousel-fade .active.carousel-item-end {
    z-index: 0;
    opacity: 0;
    transition: opacity 0s 0.6s;
}

.carousel-control-prev,
.carousel-control-next {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 15%;
    padding: 0;
    color: var(--white);
    text-align: center;
    background: none;
    border: 0;
    opacity: 0.5;
    transition: opacity 0.15s ease;
    cursor: pointer;
}

.carousel-control-prev:hover,
.carousel-control-prev:focus,
.carousel-control-next:hover,
.carousel-control-next:focus {
    color: var(--white);
    text-decoration: none;
    outline: 0;
    opacity: 0.9;
}

.carousel-control-prev {
    left: 0;
}

.carousel-control-next {
    right: 0;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    background-repeat: no-repeat;
    background-position: 50%;
    background-size: 100% 100%;
}

.carousel-control-prev-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e");
}

.carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.carousel-indicators {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2;
    display: flex;
    justify-content: center;
    padding: 0;
    margin-right: 15%;
    margin-bottom: 1rem;
    margin-left: 15%;
    list-style: none;
}

.carousel-indicators li {
    box-sizing: content-box;
    flex: 0 1 auto;
    width: 30px;
    height: 3px;
    margin-right: 3px;
    margin-left: 3px;
    text-indent: -999px;
    cursor: pointer;
    background-color: var(--white);
    background-clip: padding-box;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    opacity: 0.5;
    transition: opacity 0.6s ease;
}

.carousel-indicators .active {
    opacity: 1;
}

.carousel-caption {
    position: absolute;
    right: 15%;
    bottom: 1.25rem;
    left: 15%;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    color: var(--white);
    text-align: center;
    background: rgba(0, 0, 0, 0.5);
    border-radius: var(--border-radius-md);
}

/* ==================== 媒体对象组件 ==================== */
.media {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.media-body {
    flex: 1;
}

.media-img {
    width: 64px;
    height: 64px;
    margin-right: var(--spacing-md);
    border-radius: var(--border-radius-circle);
    object-fit: cover;
}

.media-img-sm {
    width: 48px;
    height: 48px;
}

.media-img-lg {
    width: 96px;
    height: 96px;
}

.media-heading {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.media-text {
    margin-bottom: 0;
    color: var(--gray-600);
}

.media-list {
    padding-left: 0;
    list-style: none;
}

.media-list .media {
    padding: var(--spacing-md);
    border: var(--border-width-thin) solid var(--border-color-light);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-sm);
    transition: background-color var(--transition-fast);
}

.media-list .media:hover {
    background-color: var(--gray-50);
}

/* ==================== 时间轴组件 ==================== */
.timeline {
    position: relative;
    padding: 0;
    list-style: none;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background: var(--gray-300);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 5px;
    width: 18px;
    height: 18px;
    border-radius: var(--border-radius-circle);
    background: var(--primary-color);
    border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--primary-color);
}

.timeline-item-success::before {
    background: var(--success-color);
    box-shadow: 0 0 0 3px var(--success-color);
}

.timeline-item-danger::before {
    background: var(--danger-color);
    box-shadow: 0 0 0 3px var(--danger-color);
}

.timeline-item-warning::before {
    background: var(--warning-color);
    box-shadow: 0 0 0 3px var(--warning-color);
}

.timeline-time {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
}

.timeline-content {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    line-height: var(--line-height-base);
}

.timeline-connector {
    position: absolute;
    left: 20px;
    top: 23px;
    bottom: -23px;
    width: 2px;
    background: var(--gray-300);
}

.timeline-item:last-child .timeline-connector {
    display: none;
}

/* 水平时间轴 */
.timeline-horizontal {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: var(--spacing-md);
}

.timeline-horizontal::before {
    left: 0;
    right: 0;
    top: 50%;
    height: 2px;
    width: auto;
}

.timeline-horizontal .timeline-item {
    flex: 0 0 auto;
    width: 200px;
    padding-left: 0;
    padding-top: 40px;
    margin-right: var(--spacing-lg);
}

.timeline-horizontal .timeline-item::before {
    left: 50%;
    top: 0;
    margin-left: -9px;
}

.timeline-horizontal .timeline-connector {
    left: 100%;
    top: 9px;
    width: var(--spacing-lg);
    height: 2px;
    margin-left: -1px;
}

/* ==================== 结束样式 ==================== */