/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 颜色系统 */
    --primary-color: #3A4791;
    --primary-light: rgba(58, 71, 145, 0.04);
    --primary-border: rgba(58, 71, 145, 0.08);

    --bg-color: #F7F9FC;
    --card-bg: #ffffff;
    --text-primary: #1A1B36;
    --text-secondary: #4A5568;
    --text-muted: #A0AEC0;

    --profit-color: #eb4436;
    --loss-color: #0fb45b;

    --border-color: #E2E8F0;
    --shadow: 0 5px 15px -5px rgba(58, 71, 145, 0.1);
    --shadow-hover: 0 10px 25px -5px rgba(58, 71, 145, 0.15);

    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 24px;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: var(--spacing-xl);
    }
}

/* ===== 导航栏 ===== */
.navbar {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-md) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-title {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
}

@media (min-width: 768px) {
    .nav-title {
        font-size: 1.5rem;
        text-align: left;
    }
}

/* ===== 卡片 ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}

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

.card h2 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* ===== 表单 ===== */
.input-section {
    margin-top: var(--spacing-lg);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

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

label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
}

input[type="text"],
input[type="number"],
input[type="date"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.help-text {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* ===== 按钮 ===== */
.btn-primary {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    margin-top: var(--spacing-sm);
}

.btn-primary:hover:not(:disabled) {
    background: #2d3a7a;
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loading {
    display: none;
}

.btn-primary.loading .btn-text {
    display: none;
}

.btn-primary.loading .btn-loading {
    display: inline;
}

/* ===== 错误提示 ===== */
.error-message {
    margin-bottom: var(--spacing-md);
}

.error-content {
    background: #FEE2E2;
    border: 1px solid #FECACA;
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.error-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.error-text {
    flex: 1;
    color: #991B1B;
    font-size: 0.875rem;
}

.error-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #991B1B;
    cursor: pointer;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s;
}

.error-close:hover {
    background: rgba(153, 27, 27, 0.1);
}

/* ===== 加载状态 ===== */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    display: none;
}

.loading.show {
    display: block;
}

.spinner {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--primary-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== 结果展示 ===== */
.results {
    display: none;
    margin-top: var(--spacing-lg);
}

.results.show {
    display: block;
}

/* 股票信息卡片 */
.stock-info-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #2d3a7a 100%);
    color: white;
}

.stock-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: var(--spacing-md);
}

.stock-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    border: none;
    padding: 0;
}

.stock-code {
    font-size: 0.875rem;
    opacity: 0.9;
}

.date-range {
    font-size: 0.875rem;
    opacity: 0.9;
    text-align: right;
}

@media (max-width: 480px) {
    .stock-header {
        flex-direction: column;
    }

    .date-range {
        text-align: left;
    }
}

/* 收益总览网格 */
.summary-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

@media (min-width: 480px) {
    .summary-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 768px) {
    .summary-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.summary-item {
    background: var(--primary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--primary-border);
}

.summary-item.total {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(58, 71, 145, 0.08) 0%, rgba(58, 71, 145, 0.12) 100%);
}

.summary-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.summary-item.total .value {
    font-size: 2rem;
}

.summary-item .value.positive {
    color: var(--profit-color);
}

.summary-item .value.negative {
    color: var(--loss-color);
}

@media (min-width: 768px) {
    .summary-item.total .value {
        font-size: 2.5rem;
    }
}

/* 资产列表 */
.asset-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.asset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.asset-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.asset-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.asset-value.positive {
    color: var(--profit-color);
}

.asset-value.negative {
    color: var(--loss-color);
}

/* 分红列表 */
.dividend-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 400px;
    overflow-y: auto;
}

.dividend-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--primary-border);
}

.dividend-info {
    flex: 1;
}

.dividend-date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.dividend-detail {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.dividend-amount {
    text-align: right;
    flex-shrink: 0;
}

.dividend-money {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--profit-color);
}

.dividend-money::before {
    content: '¥';
    font-size: 0.875rem;
    margin-right: 2px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

.footer p {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ===== 工具类 ===== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
}

/* ===== 响应式调整 ===== */
@media (max-width: 480px) {
    .card {
        padding: var(--spacing-md);
    }

    .summary-item .value {
        font-size: 1.25rem;
    }

    .summary-item.total .value {
        font-size: 1.75rem;
    }

    .dividend-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .dividend-amount {
        text-align: left;
        width: 100%;
    }
}