/* ============================================================
   活动报名表单系统 — 全局样式
   响应式设计，支持PC和移动端，用户导向排版
   ============================================================ */

/* ---------- CSS Variables 主题系统 ---------- */
:root {
    /* 主色调 */
    --color-primary: #66ccff;
    --color-primary-light: #99ddff;
    --color-primary-dark: #3399cc;
    --color-primary-bg: #e6f7ff;

    /* 语义色 */
    --color-success: #10b981;
    --color-success-bg: #ecfdf5;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-error: #ef4444;
    --color-error-bg: #fef2f2;
    --color-info: #3b82f6;
    --color-info-bg: #eff6ff;

    /* 中性色 */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

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

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

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* 布局 */
    --max-width: 1200px;
    --sidebar-width: 260px;
    --header-height: 60px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p { margin-bottom: var(--spacing-md); }

/* ---------- 布局容器 ---------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-content {
    flex: 1;
    padding: var(--spacing-lg) 0;
}

/* ---------- 卡片 ---------- */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

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

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

/* ---------- 按钮系统 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    font-family: var(--font-family);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
    line-height: 1.4;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg);
    border-color: var(--color-text-secondary);
}

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

.btn-success:hover:not(:disabled) {
    background: #059669;
}

.btn-danger {
    background: var(--color-error);
    color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--color-bg);
    color: var(--color-text);
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
}

/* ---------- 表单元素 ---------- */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-label .required {
    color: var(--color-error);
    margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

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

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

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-error);
}

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

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

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

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--spacing-xs);
}

/* ---------- 复选框/单选框 ---------- */
.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.checkbox-item,
.radio-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.checkbox-item > *,
.radio-item > * {
    position: relative;
    z-index: 1;
}

.checkbox-item:hover,
.radio-item:hover {
    border-color: var(--color-primary-light);
    background: var(--color-primary-bg);
}

.checkbox-item.selected,
.radio-item.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

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

/* ---------- 徽章/标签 ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    line-height: 1.6;
}

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

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

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

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

/* ---------- 提示消息 ---------- */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.alert-info {
    background: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid #bfdbfe;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #a7f3d0;
}

.alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid #fde68a;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fecaca;
}

/* ---------- 加载动画 ---------- */
.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 4px; }

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

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
    gap: var(--spacing-md);
}

/* ---------- 空状态 ---------- */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.empty-state-desc {
    font-size: var(--font-size-sm);
}

/* ---------- 表格 ---------- */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
}

th, td {
    padding: 12px var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--font-size-sm);
}

th {
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    white-space: nowrap;
}

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

tr:hover td {
    background: var(--color-bg);
}

/* ---------- 分页 ---------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
}

.pagination .btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
}

.pagination .btn.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* ---------- 模态框 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
    animation: fadeIn var(--transition-fast);
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp var(--transition-normal);
}

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

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

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xl);
    transition: background var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border-light);
}

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

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

/* ---------- Toast 通知 ---------- */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-primary);
    font-size: var(--font-size-sm);
    animation: slideInRight var(--transition-normal);
    min-width: 280px;
    max-width: 420px;
}

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

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-bold { font-weight: 600; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }

.w-full { width: 100%; }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- 响应式断点 ---------- */

/* 平板及以下 (≤1024px) */
@media (max-width: 1024px) {
    :root {
        --max-width: 100%;
    }

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

    .hide-tablet {
        display: none !important;
    }
}

/* 移动端 (≤768px) */
@media (max-width: 768px) {
    :root {
        --font-size-base: 0.9375rem;
    }

    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }

    .card {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .btn {
        padding: 10px 16px;
    }

    .modal {
        max-width: 100%;
        margin: var(--spacing-md);
        border-radius: var(--radius-lg);
        max-height: 85vh;
    }

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

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

    .modal-footer {
        padding: var(--spacing-md);
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }

    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        top: var(--spacing-md);
    }

    .toast {
        min-width: unset;
        max-width: 100%;
    }

    .table-wrapper {
        margin: 0 calc(-1 * var(--spacing-md));
        border-radius: 0;
        border-left: none;
        border-right: none;
    }

    .hide-mobile {
        display: none !important;
    }
}

/* 小屏手机 (≤480px) */
@media (max-width: 480px) {
    :root {
        --spacing-md: 12px;
        --spacing-lg: 16px;
    }

    .btn {
        font-size: var(--font-size-xs);
    }
}

/* ---------- 数据表格 ---------- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--font-size-sm);
}

.data-table th {
    background: var(--color-bg-secondary);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

.table-actions {
    display: flex;
    gap: 6px;
    white-space: nowrap;
}

/* ---------- 危险徽章 ---------- */
.badge-danger {
    background: var(--color-error-bg);
    color: var(--color-error);
}

/* ---------- 警告按钮 ---------- */
.btn-warning {
    background: var(--color-warning);
    color: #ffffff;
}

.btn-warning:hover:not(:disabled) {
    background: #d97706;
}

/* ---------- 数据大屏头部操作区 ---------- */
.dashboard-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* ---------- 表单选择器（数据大屏用） ---------- */
.form-select {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--color-surface);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.form-select:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px var(--color-primary-bg);
}

/* ---------- 表格容器 ---------- */
.table-container {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

/* ============================================================
   悬浮窗选择器（Picker）样式
   移动端友好的底部弹出式选择器
   ============================================================ */

/* 触发按钮 */
.picker-trigger {
    text-align: left;
    position: relative;
    padding-right: 32px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.picker-trigger::after {
    content: "▾";
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 12px;
    pointer-events: none;
}

.picker-trigger.picker-has-value {
    color: var(--color-text);
    font-weight: 500;
}

/* 遮罩层 */
.picker-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0);
    z-index: 2000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    transition: background 0.25s ease;
    pointer-events: none;
}

.picker-overlay.picker-open {
    background: rgba(0, 0, 0, 0.4);
    pointer-events: auto;
}

/* 弹出面板 */
.picker-sheet {
    background: var(--color-surface);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    width: 100%;
    max-width: 500px;
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
}

.picker-open .picker-sheet {
    transform: translateY(0);
}

/* 头部 */
.picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-light);
    flex-shrink: 0;
}

.picker-cancel,
.picker-confirm {
    background: none;
    border: none;
    font-size: var(--font-size-base);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.picker-cancel {
    color: var(--color-text-secondary);
}

.picker-cancel:hover {
    background: var(--color-bg);
}

.picker-confirm {
    color: var(--color-primary);
    font-weight: 600;
}

.picker-confirm:hover {
    background: var(--color-primary-bg);
}

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

/* 选项列表 */
.picker-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm) 0;
    -webkit-overflow-scrolling: touch;
}

.picker-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px var(--spacing-lg);
    font-size: var(--font-size-base);
    color: var(--color-text);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-border-light);
}

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

.picker-item:hover {
    background: var(--color-primary-bg);
}

.picker-item:active {
    background: var(--color-primary-bg);
}

.picker-item-active {
    color: var(--color-primary);
    font-weight: 600;
}

.picker-check {
    color: var(--color-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

/* ============================================================
   齿轮滚轮式日期时间选择器样式
   ============================================================ */

.wheel-picker-sheet {
    max-width: 100%;
}

.wheel-picker-body {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.wheel-picker-display {
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    padding: var(--spacing-sm) 0 var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--spacing-md);
}

.wheel-picker-columns {
    display: flex;
    gap: 2px;
    flex: 1;
    overflow: hidden;
    position: relative;
    min-height: 200px;
}

/* 中间选中带 */
.wheel-picker-center-band {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 40px;
    background: var(--color-primary-bg);
    border-top: 1px solid var(--color-primary-light);
    border-bottom: 1px solid var(--color-primary-light);
    border-radius: var(--radius-md);
    z-index: 0;
    pointer-events: none;
}

.wheel-picker-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
    z-index: 1;
}

.wheel-picker-col-label {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    padding: 4px 0;
    font-weight: 500;
    flex-shrink: 0;
}

.wheel-picker-viewport {
    flex: 1;
    overflow: hidden;
    position: relative;
    cursor: grab;
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(0, 0, 0, 0.3) 15%,
        rgba(0, 0, 0, 0.7) 35%,
        #000 50%,
        rgba(0, 0, 0, 0.7) 65%,
        rgba(0, 0, 0, 0.3) 85%,
        transparent 100%
    );
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(0, 0, 0, 0.3) 15%,
        rgba(0, 0, 0, 0.7) 35%,
        #000 50%,
        rgba(0, 0, 0, 0.7) 65%,
        rgba(0, 0, 0, 0.3) 85%,
        transparent 100%
    );
}

.wheel-picker-viewport:active {
    cursor: grabbing;
}

.wheel-picker-list {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    transform-origin: center;
    will-change: transform;
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.wheel-picker-item {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-base);
    color: var(--color-text);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    text-align: center;
    transform-origin: center;
    transition: color 0.2s ease, font-weight 0.2s ease;
    will-change: transform, opacity;
}

.wheel-picker-item.wheel-item-active {
    color: var(--color-primary);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.wheel-picker-item.wheel-item-near {
    color: var(--color-text-secondary);
}

.wheel-picker-item.wheel-item-far {
    color: var(--color-text-muted);
}

/* 操作按钮区 */
.wheel-picker-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.wheel-picker-now {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.wheel-picker-now:hover {
    background: var(--color-primary);
    color: #fff;
}

.wheel-picker-now:active {
    transform: scale(0.98);
}

/* ============================================================
   移动端数据大屏提示
   ============================================================ */

.dashboard-mobile-notice {
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
}

/* 移动端隐藏图表区域 */
@media (max-width: 768px) {
    .dashboard-charts {
        display: none;
    }

    .picker-sheet {
        max-width: 100%;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }

    .wheel-picker-item {
        font-size: var(--font-size-sm);
    }

    .wheel-picker-item.wheel-item-active {
        font-size: var(--font-size-base);
    }
}