/* ============================================================
   报关单自动化系统 - 设计系统
   小红书风格：简洁、专业、圆润
   ============================================================ */

/* === CSS 变量 === */
:root {
    /* 主色系 */
    --color-primary: #1565C0;
    --color-primary-light: #1E88E5;
    --color-primary-dark: #0D47A1;
    --color-primary-bg: rgba(21, 101, 192, 0.06);
    --color-accent: #FF2442;
    --color-accent-light: #FF5A6E;

    /* 语义色 */
    --color-success: #4CAF50;
    --color-success-bg: rgba(76, 175, 80, 0.08);
    --color-warning: #FF9800;
    --color-warning-bg: rgba(255, 152, 0, 0.08);
    --color-danger: #F44336;
    --color-danger-bg: rgba(244, 67, 54, 0.08);
    --color-info: #2196F3;
    --color-info-bg: rgba(33, 150, 243, 0.08);

    /* 中性色 */
    --color-bg: #F5F5F5;
    --color-card: #FFFFFF;
    --color-border: #E8E8E8;
    --color-border-light: #F0F0F0;
    --color-text: #333333;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-text-placeholder: #BDBDBD;

    /* 字体 */
    --font-family: system-ui, -apple-system, "Microsoft YaHei", sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --line-height: 1.6;

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-base: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-base: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);

    /* 动画 */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* 布局 */
    --navbar-height: 60px;
    --content-max-width: 1200px;
    --sidebar-width: 240px;
}

/* === 全局 Reset === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

ul, ol {
    list-style: none;
}

/* === 导航栏 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-right: var(--spacing-xl);
    flex-shrink: 0;
}

.brand-icon {
    font-size: 22px;
}

.brand-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.brand-version {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.nav-tabs {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    height: 100%;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 var(--spacing-base);
    height: 100%;
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

.nav-tab:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.nav-tab.active {
    color: var(--color-primary);
    font-weight: 500;
    border-bottom-color: var(--color-primary);
}

.tab-icon {
    font-size: 16px;
}

/* === 页面容器 === */
.content {
    margin-top: var(--navbar-height);
    padding: var(--spacing-lg);
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
    min-height: calc(100vh - var(--navbar-height));
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

/* === 卡片组件 === */
.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-base);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.card-body {
    padding: 0;
}

.card-footer {
    margin-top: var(--spacing-base);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* 卡片无悬浮效果变体 */
.card-static {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-base);
}

/* === 按钮系统 === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-base);
    border: 1px solid transparent;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
    line-height: 1.4;
}

.btn:active {
    transform: scale(0.96);
}

.btn-primary {
    background: var(--color-primary);
    color: #FFFFFF;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    box-shadow: 0 4px 12px rgba(21, 101, 192, 0.3);
}

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

.btn-danger:hover {
    background: #E53935;
    border-color: #E53935;
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
}

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

.btn-success:hover {
    background: #43A047;
    border-color: #43A047;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

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

.btn-outline:hover {
    background: var(--color-primary-bg);
}

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

.btn-ghost:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.btn-sm {
    padding: 4px 10px;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 12px 24px;
    font-size: var(--font-size-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* === 输入框 / 表单 === */
.input,
.select,
.textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    transition: var(--transition);
    line-height: 1.4;
}

.input:focus,
.select:focus,
.textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

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

.textarea {
    resize: vertical;
    min-height: 80px;
}

.select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.form-group {
    margin-bottom: var(--spacing-base);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 4px;
}

.form-row {
    display: flex;
    gap: var(--spacing-base);
}

.form-row .form-group {
    flex: 1;
}

/* === 表格 === */
.table-container {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    overflow: hidden;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-base);
}

.table thead {
    background: var(--color-bg);
}

.table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
}

.table tbody tr:hover {
    background: var(--color-primary-bg);
}

.table tbody tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.015);
}

.table tbody tr:nth-child(even):hover {
    background: var(--color-primary-bg);
}

.table-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

/* === 标签/徽章 === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

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

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

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

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

.badge-primary {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

/* === Toast 通知 === */
#toast-container {
    position: fixed;
    top: calc(var(--navbar-height) + 16px);
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 20px;
    background: var(--color-card);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-base);
    color: var(--color-text);
    animation: slideDown 0.3s ease;
    pointer-events: auto;
    max-width: 360px;
    border-left: 4px solid var(--color-info);
}

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

.toast-error {
    border-left-color: var(--color-danger);
}

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

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

.toast-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    word-break: break-word;
}

.toast-exit {
    animation: fadeOut 0.3s ease forwards;
}

/* === Modal 弹窗 === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    animation: fadeIn 0.2s ease;
    backdrop-filter: blur(2px);
}

.modal {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 480px;
    animation: slideUp 0.3s ease;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition-fast);
    background: none;
    border: none;
}

.modal-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.modal-body {
    padding: 0 var(--spacing-lg);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    padding-top: var(--spacing-base);
}

/* === Loading === */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 8000;
    animation: fadeIn 0.2s ease;
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

/* === 文件拖拽区域 === */
.drop-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--color-bg);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.drop-zone-icon {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
}

.drop-zone-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.drop-zone-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* === 可搜索下拉框 === */
.searchable-select {
    position: relative;
}

.searchable-select-input {
    width: 100%;
    padding: 10px 14px;
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    background: var(--color-card);
    cursor: pointer;
    transition: var(--transition);
}

.searchable-select-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.searchable-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 4px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-md);
    max-height: 240px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    animation: slideDown 0.2s ease;
}

.searchable-select-dropdown.open {
    display: block;
}

.searchable-select-option {
    padding: 10px 14px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-base);
}

.searchable-select-option:hover,
.searchable-select-option.highlighted {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.searchable-select-option.selected {
    background: var(--color-primary);
    color: #fff;
}

.searchable-select-empty {
    padding: 12px 14px;
    color: var(--color-text-muted);
    text-align: center;
    font-size: var(--font-size-sm);
}

/* === 工具类 === */
/* Flex 布局 */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-base { gap: var(--spacing-base); }
.gap-lg { gap: var(--spacing-lg); }

/* 间距 */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-base { margin-top: var(--spacing-base); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-base { margin-bottom: var(--spacing-base); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* 文字 */
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-medium { font-weight: 500; }
.font-bold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 显示 */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.w-full { width: 100%; }

/* === 页面占位 === */
.page-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--color-text-muted);
}

.page-placeholder h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

/* === 动画关键帧 === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

/* === 滚动条美化 === */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* === 响应式 === */
@media (max-width: 1024px) {
    .content {
        padding: var(--spacing-base);
    }

    .nav-tabs {
        overflow-x: auto;
    }

    .nav-tab {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 var(--spacing-base);
    }

    .nav-brand {
        margin-right: var(--spacing-base);
    }

    .brand-text {
        font-size: var(--font-size-md);
    }

    .content {
        padding: var(--spacing-md);
    }

    .card {
        padding: var(--spacing-base);
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .tab-icon {
        display: none;
    }
}