/* ===== CSS 变量：Light/Dark 主题 ===== */
:root,
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f7fa;
    --bg-card: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --border-color: #e0e0e0;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --danger-color: #e74c3c;
    --success-color: #27ae60;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --nav-bg: #ffffff;
    --footer-bg: #f5f7fa;
    --input-bg: #ffffff;
    --tag-bg: #e8f4fd;
    --tag-color: #2980b9;
}

[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #0f3460;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #2a2a4a;
    --accent-color: #4fc3f7;
    --accent-hover: #29b6f6;
    --danger-color: #ef5350;
    --success-color: #66bb6a;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --nav-bg: #16213e;
    --footer-bg: #16213e;
    --input-bg: #1a1a2e;
    --tag-bg: #1a3a5c;
    --tag-color: #4fc3f7;
}

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

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

/* ===== 导航栏 ===== */
.navbar {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 1.05rem;
    transition: color 0.2s;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--bg-secondary);
}

/* ===== 主容器 ===== */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2.5rem 3rem;
    flex: 1;
    width: 100%;
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}

.card-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.tag {
    background-color: var(--tag-bg);
    color: var(--tag-color);
    padding: 0.3rem 0.8rem;
    border-radius: 14px;
    font-size: 0.9rem;
    font-weight: 500;
}

.card-meta {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.card-actions {
    margin-top: 1.2rem;
    display: flex;
    gap: 0.8rem;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 0.6rem 1.4rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s, opacity 0.2s;
    text-decoration: none;
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
}

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

.btn-danger:hover {
    opacity: 0.85;
    color: #fff;
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
    margin-top: 1rem;
    padding: 0.9rem;
    font-size: 1.1rem;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-link {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 1.8rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.85rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1.05rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-control-lg {
    padding: 1rem 1.4rem;
    font-size: 1.15rem;
}

.form-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.required {
    color: var(--danger-color);
}

/* ===== 登录表单 ===== */
.login-container {
    max-width: 520px;
    margin: 5rem auto;
    background-color: var(--bg-card);
    padding: 3.5rem;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.login-container h2 {
    text-align: center;
    margin-bottom: 0.6rem;
    font-size: 1.8rem;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.error-msg {
    color: var(--danger-color);
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    background-color: rgba(231, 76, 60, 0.08);
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
}

/* ===== 页面标题 ===== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
}

.page-header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* ===== 表格 ===== */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

th, td {
    padding: 1rem 1.4rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-secondary);
}

td {
    font-size: 1rem;
}

/* ===== iframe 视图 ===== */
.vision-frame-container {
    width: 100%;
    height: 80vh;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin-top: 1.5rem;
}

.vision-frame-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== API 文档 ===== */
.api-doc-list {
    list-style: none;
}

.api-doc-list li {
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-card);
}

.api-doc-list li:first-child {
    border-radius: 10px 10px 0 0;
}

.api-doc-list li:last-child {
    border-radius: 0 0 10px 10px;
    border-bottom: none;
}

.api-doc-name {
    font-weight: 600;
    color: var(--accent-color);
    font-size: 1.1rem;
}

.api-doc-summary {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

.api-doc-text-output {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    white-space: pre-wrap;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== 模块筛选 ===== */
.module-filter {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.module-filter .btn {
    padding: 0.4rem 1rem;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.module-filter .btn.active {
    background-color: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* ===== 页脚 ===== */
.footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-info {
    margin-top: 0.4rem;
    font-size: 0.85rem;
    opacity: 0.8;
}

/* ===== 统计卡片 ===== */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
}

.stat-number {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.2;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: 0.8rem;
    font-weight: 500;
}

/* ===== 统计图表 ===== */
.stats-chart {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    padding: 2.5rem 3rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: var(--shadow);
    min-height: 320px;
    margin-bottom: 3rem;
}

.chart-bar-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chart-bar {
    width: 100%;
    max-width: 100px;
    background: linear-gradient(180deg, var(--accent-color), var(--accent-hover));
    border-radius: 8px 8px 0 0;
    min-height: 8px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    transition: height 0.3s ease;
}

.chart-bar-value {
    font-size: 0.95rem;
    color: #fff;
    font-weight: 600;
    padding-top: 8px;
}

.chart-bar-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.8rem;
    white-space: nowrap;
    font-weight: 500;
}

/* ===== 统计区块标题 ===== */
.stats-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 3rem 0 1.5rem;
    color: var(--text-primary);
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--border-color);
}

/* ===== 统计双栏布局 ===== */
.stats-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-top: 2rem;
}

/* ===== 管理后台通用 ===== */
.admin-section {
    margin-top: 1.5rem;
}

.admin-table td {
    vertical-align: middle;
}

.td-title {
    font-weight: 500;
    max-width: 400px;
}

.td-number {
    font-weight: 600;
    color: var(--accent-color);
}

.td-actions {
    white-space: nowrap;
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

/* ===== 管理后台表单容器 ===== */
.admin-form-container {
    max-width: 860px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 3rem;
    box-shadow: var(--shadow);
}

.form-meta-card {
    display: flex;
    gap: 2.5rem;
    padding: 1.2rem 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: 10px;
    margin-bottom: 2rem;
    font-size: 1rem;
    color: var(--text-secondary);
}

.form-actions {
    display: flex;
    gap: 1.2rem;
    align-items: center;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.file-upload-area {
    padding: 1.5rem;
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    background-color: var(--bg-secondary);
}

.form-result {
    margin-top: 2rem;
}

.result-loading {
    color: var(--accent-color);
    font-weight: 500;
    font-size: 1.05rem;
}

.result-success {
    color: var(--success-color);
    font-weight: 500;
    font-size: 1.05rem;
}

.result-error {
    color: var(--danger-color);
    font-weight: 500;
    font-size: 1.05rem;
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: 5rem 3rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1.2rem;
}

.empty-state-text {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .container {
        padding: 2rem;
    }
    .nav-container {
        padding: 0 2rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }
    .nav-container {
        padding: 0 1rem;
    }
    .stats-cards {
        grid-template-columns: 1fr;
    }
    .stats-grid-2col {
        grid-template-columns: 1fr;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

/* ===== 安全级别设置 ===== */
.security-settings {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.security-info {
    margin-bottom: 1.2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.security-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.security-label {
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 120px;
}

.security-value {
    font-weight: 700;
    color: var(--accent-color);
    font-size: 1.1rem;
}

.security-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: 0.5rem;
}

.security-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-group label {
    font-weight: 500;
    color: var(--text-primary);
    min-width: 160px;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
}

.inline-form {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-sm {
    width: 80px;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.hint {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.security-notice {
    background: var(--bg-secondary);
    border-left: 3px solid var(--danger-color);
    padding: 0.8rem 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}