/* Bootstrap 5.3.0 - 简化版（包含基础样式） */
/* 由于网络限制，这里包含Bootstrap核心样式的简化版本 */

:root {
    --bs-blue: #0d6efd;
    --bs-indigo: #6610f2;
    --bs-purple: #6f42c1;
    --bs-pink: #d63384;
    --bs-red: #dc3545;
    --bs-orange: #fd7e14;
    --bs-yellow: #ffc107;
    --bs-green: #198754;
    --bs-teal: #20c997;
    --bs-cyan: #0dcaf0;
    --bs-gray-100: #f8f9fa;
    --bs-gray-200: #e9ecef;
    --bs-gray-300: #dee2e6;
    --bs-gray-400: #ced4da;
    --bs-gray-500: #adb5bd;
    --bs-gray-600: #6c757d;
    --bs-gray-700: #495057;
    --bs-gray-800: #343a40;
    --bs-gray-900: #212529;
    --bs-primary: #0d6efd;
    --bs-secondary: #6c757d;
    --bs-success: #198754;
    --bs-info: #0dcaf0;
    --bs-warning: #ffc107;
    --bs-danger: #dc3545;
    --bs-light: #f8f9fa;
    --bs-dark: #212529;
    --bs-font-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-font-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --bs-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0));
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-family: sans-serif;
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
    margin: 0;
    font-family: var(--bs-font-sans-serif);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    -webkit-font-smoothing: antialiased;
}

/* 工具类 */
.container {
    width: 100%;
    padding-right: var(--bs-gutter-x, 0.75rem);
    padding-left: var(--bs-gutter-x, 0.75rem);
    margin-right: auto;
    margin-left: auto;
}

.container-fluid {
    width: 100%;
    padding-right: var(--bs-gutter-x, 0.75rem);
    padding-left: var(--bs-gutter-x, 0.75rem);
    margin-right: auto;
    margin-left: auto;
}

.row {
    --bs-gutter-x: 1.5rem;
    --bs-gutter-y: 0;
    display: flex;
    flex-wrap: wrap;
    margin-top: calc(-1 * var(--bs-gutter-y));
    margin-right: calc(-0.5 * var(--bs-gutter-x));
    margin-left: calc(-0.5 * var(--bs-gutter-x));
}

.col {
    flex: 1 0 0%;
}

.gap-2 {
    gap: 0.5rem !important;
}

.gap-3 {
    gap: 1rem !important;
}

.d-flex {
    display: flex !important;
}

.flex-row {
    flex-direction: row !important;
}

.flex-column {
    flex-direction: column !important;
}

.align-items-center {
    align-items: center !important;
}

.align-items-start {
    align-items: flex-start !important;
}

.align-items-end {
    align-items: flex-end !important;
}

.justify-content-center {
    justify-content: center !important;
}

.justify-content-between {
    justify-content: space-between !important;
}

.justify-content-end {
    justify-content: flex-end !important;
}

.flex-wrap {
    flex-wrap: wrap !important;
}

.flex-grow-1 {
    flex-grow: 1 !important;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.375rem;
    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;
}

.btn:hover {
    color: #212529;
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn:disabled,
fieldset:disabled .btn {
    pointer-events: none;
    opacity: 0.65;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
}

.btn-primary {
    color: #fff;
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    color: #fff;
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.btn-secondary {
    color: #fff;
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    color: #fff;
    background-color: #5c636a;
    border-color: #565e64;
}

.btn-success {
    color: #fff;
    background-color: #198754;
    border-color: #198754;
}

.btn-success:hover {
    color: #fff;
    background-color: #157347;
    border-color: #146c43;
}

.btn-info {
    color: #000;
    background-color: #0dcaf0;
    border-color: #0dcaf0;
}

.btn-info:hover {
    color: #000;
    background-color: #31d2f2;
    border-color: #25cff2;
}

.btn-warning {
    color: #000;
    background-color: #ffc107;
    border-color: #ffc107;
}

.btn-warning:hover {
    color: #000;
    background-color: #ffca2c;
    border-color: #ffc720;
}

.btn-danger {
    color: #fff;
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    color: #fff;
    background-color: #bb2d3b;
    border-color: #b02a37;
}

/* 表单样式 */
.form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: #212529;
    background-color: #fff;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-control::-webkit-date-and-time-value {
    height: 1.5em;
}

.form-select {
    display: block;
    width: 100%;
    padding: 0.375rem 2.25rem 0.375rem 0.75rem;
    -moz-padding-start: calc(0.75rem - 3px);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    border: 1px solid #ced4da;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    appearance: none;
}

.form-select:focus {
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* 辅助类 */
.text-center {
    text-align: center !important;
}

.text-start {
    text-align: left !important;
}

.text-end {
    text-align: right !important;
}

.me-2 {
    margin-right: 0.5rem !important;
}

.me-3 {
    margin-right: 1rem !important;
}

.mb-2 {
    margin-bottom: 0.5rem !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}

.mt-2 {
    margin-top: 0.5rem !important;
}

.mt-3 {
    margin-top: 1rem !important;
}

.py-2 {
    padding-top: 0.5rem !important;
    padding-bottom: 0.5rem !important;
}

.py-3 {
    padding-top: 1rem !important;
    padding-bottom: 1rem !important;
}

.px-3 {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
}

.p-3 {
    padding: 1rem !important;
}

.w-100 {
    width: 100% !important;
}

.h-100 {
    height: 100% !important;
}

.d-none {
    display: none !important;
}

.d-inline-block {
    display: inline-block !important;
}

.position-relative {
    position: relative !important;
}

.position-absolute {
    position: absolute !important;
}

.position-fixed {
    position: fixed !important;
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1055;
    display: none;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    outline: 0;
}

.modal.show {
    display: block;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1050;
    width: 100vw;
    height: 100vh;
    background-color: #000;
}

.modal-backdrop.fade {
    opacity: 0;
}

.modal-backdrop.show {
    opacity: 0.5;
}

/* 模态框对话框 - 基础布局（Bootstrap 5 核心） */
.modal-dialog {
    position: relative;
    width: auto;
    margin: 1.75rem auto;
    pointer-events: none;
}

.modal-dialog-centered {
    display: flex;
    align-items: center;
    min-height: calc(100% - 2 * 1.75rem);
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 0.375rem;
    outline: 0;
}

/* 响应式断点 */
@media (max-width: 575.98px) {
    .d-sm-none {
        display: none !important;
    }
}

@media (min-width: 576px) {
    .container-sm,
    .container {
        max-width: 540px;
    }
}

@media (min-width: 768px) {
    .container-md,
    .container-sm,
    .container {
        max-width: 720px;
    }

    .col-md-6 {
        flex: 0 0 auto;
        width: 50%;
    }
}

@media (min-width: 992px) {
    .container-lg,
    .container-md,
    .container-sm,
    .container {
        max-width: 960px;
    }
}

@media (min-width: 1200px) {
    .container-xl,
    .container-lg,
    .container-md,
    .container-sm,
    .container {
        max-width: 1140px;
    }
}

@media (min-width: 1400px) {
    .container-xxl,
    .container-xl,
    .container-lg,
    .container-md,
    .container-sm,
    .container {
        max-width: 1320px;
    }
}