/* 
   =========================================
   1. 全局变量与配色系统 (CSS Variables)
   ========================================= 
*/
:root {
    /* --- 浅色模式 (Light Mode) --- */
    --bg-color: #f8f9fa;
    /* 页面整体背景 */
    --card-bg: #ffffff;
    /* 卡片/表格/容器背景 */
    --panel-bg: #ffffff;

    --text-main: #001d31;
    /* 主文字色 */
    --text-light: #666666;
    /* 次要文字色 */

    --border-color: #dee2e6;
    /* 边框颜色 */

    --primary-color: #001d31;
    /* 品牌主色 (深蓝) - 用于按钮/高亮 */
    --primary-hover: #004060;
    /* 主色悬停 */
    --btn-text: #ffffff;
    /* 主按钮文字色 */

    --header-bg: #ffffff;
    /* 顶部导航背景 */
    --footer-bg: #ffffff;
    /* 底部背景 */

    --btn-info-bg: #e9ecef;
    /* 次级按钮(灰色)背景 */
    --btn-info-text: #495057;
    /* 次级按钮文字 */
    --btn-info-hover: #dee2e6;

    /* 表格相关 */
    --table-head-bg: #f1f3f5;
    --table-head-text: #001d31;
    --table-row-hover: #f8f9fa;
    --table-cell-border: #eeeeee;

    /* 选项卡/标签相关 */
    --tab-bg: #f8f9fa;
    --tab-hover: rgba(0, 0, 0, 0.03);

    /* --- [修改] 对比模式颜色 (浅色) --- */
    --diff-bg: #efbdc3;
    /* 浅红背景 */
    --diff-text: #d93025;
    /* 深红文字 */
    --same-bg: #e6ffed;
    /* 浅绿背景 */
    --same-text: #137333;
    /* 深绿文字 */
    --selected-bg: #e8f0fe;
    /* 选中列背景 */

    /* 帮助弹窗与杂项 */
    --help-code-bg: #f7f9fa;
    --filter-tag-bg: #f8f9fa;
    --filter-toolbar-bg: #eef2f7;
    /* 对比工具栏背景 */

    --header-height: 60px;
}

[data-theme="dark"] {
    /* --- 深色模式 (Dark Mode) --- */
    --bg-color: #1a1a1a;
    /* 深灰背景 */
    --card-bg: #1f2020;
    /* 卡片背景 (稍亮) */
    --panel-bg: #1f2020;

    --text-main: #e5e8ea;
    /* 浅灰白文字 */
    --text-light: #a0b0b9;
    /* 灰文字 */

    --border-color: #333333;
    /* 深色边框 */

    --primary-color: #006098;
    /* 提亮的主色 (适应暗底) */
    --primary-hover: #0070b0;
    --btn-text: #ffffff;

    --header-bg: #1f2020;
    --footer-bg: #1f2020;

    --btn-info-bg: #373838;
    --btn-info-text: #e5e8ea;
    --btn-info-hover: #4a4b4c;

    /* 表格相关 */
    --table-head-bg: #2c2d2e;
    --table-head-text: #e5e8ea;
    --table-row-hover: #2a2b2c;
    --table-cell-border: #333333;

    /* 选项卡/标签相关 */
    --tab-bg: #2c2d2e;
    --tab-hover: rgba(255, 255, 255, 0.05);

    /* 对比模式 */
    --diff-bg: #5c1b1b;
    /* 深红背景 */
    --diff-text: #ff8a80;
    /* 亮红文字 */
    --same-bg: #1b3e20;
    /* 深绿背景 */
    --same-text: #81c995;
    /* 亮绿文字 */
    --selected-bg: rgba(66, 133, 244, 0.2);

    /* 帮助弹窗与杂项 */
    --help-code-bg: #2a2a2a;
    --filter-tag-bg: #2c2d2e;
    --filter-toolbar-bg: #2c2d2e;
}

/* 
   =========================================
   2. 基础重置 (Reset & Base)
   ========================================= 
*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

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

/* 
   =========================================
   3. 顶部导航栏 (Header)
   ========================================= 
*/
.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 20px;
    background-color: var(--header-bg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    flex-shrink: 0;
    z-index: 100;
    position: relative;
    touch-action: none;
    color: var(--text-main);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    z-index: 2;
    min-width: 80px;
    gap: 8px;
}

.header-left .btn,
.header-right .btn {
    margin: 0 !important;
}

.header-right {
    justify-content: flex-end;
}

.header-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    touch-action: manipulation;
}

.header-logo {
    height: 32px;
    width: auto;
}

.app-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
}

/* 
   =========================================
   4. 按钮系统 (Buttons)
   ========================================= 
*/
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    line-height: 1;
    height: 34px;
    box-sizing: border-box;
    margin: 0;
    touch-action: manipulation;
    white-space: nowrap;
}

.btn-icon {
    width: 1.1em;
    height: 1.1em;
    fill: currentColor;
    margin-top: -1px;
}

/* 主色按钮 */
.btn-primary {
    background-color: var(--primary-color);
    color: var(--btn-text);
    border-color: var(--primary-color);
}

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

/* 次级按钮 (返回/帮助) */
.btn-info {
    background-color: var(--btn-info-bg);
    color: var(--btn-info-text);
    border-color: var(--border-color);
}

.btn-info:hover {
    background-color: var(--btn-info-hover);
    color: var(--text-main);
    border-color: var(--border-color);
}

/* 主页按钮 */
.btn-dark {
    background-color: #001d31;
    color: white;
    border-color: #001d31;
}

.btn-dark:hover {
    background-color: #004060;
    border-color: #004060;
}

[data-theme="dark"] .btn-dark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-dark .btn-icon path,
.btn-dark .btn-icon circle {
    fill: white !important;
}

/* 筛选器/PDF控制栏按钮 */
.ctrl-btn {
    /* 默认状态 */
    background-color: var(--btn-info-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 0 20px;
    height: 36px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    line-height: 1;
}

.ctrl-btn:hover {
    background-color: var(--btn-info-hover);
    border-color: var(--border-color);
}

/* 选中状态 */
.ctrl-btn.primary,
.ctrl-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--btn-text);
}

.ctrl-btn.primary:hover,
.ctrl-btn.active:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
    height: 28px;
}

/* 
   =========================================
   5. 通用容器 (Containers)
   ========================================= 
*/
.tool-container {
    flex: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    overflow-y: auto;
}

.page-title {
    text-align: center;
    color: var(--text-main);
    font-size: 28px;
    margin-bottom: 10px;
}

.page-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 30px;
}

.tool-card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    margin-bottom: 30px;
    color: var(--text-main);
}

/* 
   =========================================
   6. 底部 (Footer)
   ========================================= 
*/
.bottom-bar,
.tool-footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 8px 20px;
    font-size: 0.8rem;
    color: var(--text-light);
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    touch-action: none;
}

.footer-content,
.footer-items {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-content a,
.footer-items a {
    touch-action: manipulation;
}

.footer-content a:hover,
.footer-items a:hover {
    text-decoration: underline;
}

.beian-icon {
    height: 14px;
    margin-right: 2px;
    vertical-align: middle;
}

/* 
   =========================================
   7. 弹窗 (Dialog)
   ========================================= 
*/
.text-dialog {
    background: var(--card-bg) !important;
    color: var(--text-main) !important;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* 
   =========================================
   8. 表格系统 (Table)
   ========================================= 
*/
.table-container,
.table-responsive {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
}

.modern-table,
table {
    width: 100%;
    border-collapse: collapse;
    min-width: 400px;
}

th,
td {
    padding: 12px 8px;
    text-align: center;
    border-bottom: 1px solid var(--table-cell-border);
}

th {
    background-color: var(--table-head-bg);
    color: var(--table-head-text);
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
}

td {
    font-size: 14px;
    line-height: 1.3;
    color: var(--text-main);
    transition: background 0.2s;
    cursor: pointer;
}

tr:hover,
tbody tr:hover {
    background-color: var(--table-row-hover);
}

/* 站名变化统计 - 差异高亮 */
td.diff {
    background-color: var(--diff-bg) !important;
    color: var(--diff-text) !important;
    font-weight: 700;
    /* 加粗显示差异 */
    position: relative;
    /* 确保层级 */
}

td.same {
    background-color: var(--same-bg) !important;
    color: var(--same-text) !important;
    opacity: 0.9;
}

th.selected,
td.selected {
    background-color: var(--selected-bg);
    color: var(--primary-color);
}

th.selected::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: #3498db;
    z-index: 1;
}

/* 站名表头交互 */
.station-table th {
    cursor: pointer;
    transition: background 0.2s;
}

.station-table th:hover {
    background-color: var(--border-color);
}

.station-table th:nth-child(1),
.station-table th:nth-child(2) {
    cursor: default;
    background-color: var(--table-head-bg);
}

/* 
   =========================================
   9. PDF 阅读器 (英文地图)
   ========================================= 
*/
.pdf-wrapper {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
}

.pdf-controls {
    margin-bottom: 15px;
    display: flex;
    gap: 10px;
}

#pdf-canvas-container {
    flex: 1;
    overflow: auto;
    background-color: #525659;
    /* PDF背景保持深灰 */
    border-radius: 4px;
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 20px;
    max-height: 80vh;
}

canvas {
    display: block;
    margin: 0 auto;
}

/* 
   =========================================
   10. 选项卡 (Tabs - 乘换引导)
   ========================================= 
*/
.tabs-wrapper {
    width: 100%;
    overflow-x: auto;
    background: var(--tab-bg);
    border-bottom: 1px solid var(--border-color);
    border-radius: 12px 12px 0 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.tabs-wrapper::-webkit-scrollbar {
    display: none;
}

.modern-tabs {
    display: flex;
    padding: 0 5px;
    gap: 0;
    width: max-content;
}

.tab-item {
    padding: 12px 20px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    font-weight: 500;
    white-space: nowrap;
}

.tab-item:hover {
    color: var(--text-main);
    background-color: var(--tab-hover);
}

.tab-item.active {
    color: var(--primary-color);
    font-weight: bold;
    background-color: var(--card-bg);
}

/* 
   =========================================
   11. 图片查看器 (乘换引导)
   ========================================= 
*/
.image-viewer-card {
    padding: 0 !important;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.image-display-area {
    width: 100%;
    min-height: 400px;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    /* 网格背景 */
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

.image-display-area img {
    max-width: 100%;
    height: auto;
    max-height: 70vh;
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: opacity 0.3s ease;
}

.viewer-actions {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    gap: 15px;
    background: var(--card-bg);
}

/* 
   =========================================
   12. 站名变化统计 - 筛选与标签 (Filters)
   ========================================= 
*/
.filter-card {
    padding: 20px;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    justify-content: center;
}

.filter-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    flex-wrap: wrap;
    gap: 15px;
}

.filter-tag {
    padding: 5px 12px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background-color: var(--filter-tag-bg);
    color: var(--text-light);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}

.filter-tag:hover {
    background-color: var(--btn-info-hover);
    color: var(--text-main);
}

.filter-tag.active {
    box-shadow: 0 0 0 2px var(--primary-color) inset;
    border-color: transparent;
    font-weight: bold;
    color: var(--text-main);
}

/* 线路颜色定义 (保持硬编码颜色，深色模式下文字设为白色) */
.filter-tag[data-line="all"].active {
    background: var(--primary-color);
    color: white;
}

.filter-tag[data-line="1号线八通线"].active,
.line-1号线八通线 {
    background-color: #c23a30;
    color: white;
}

.filter-tag[data-line="2号线"].active,
.line-2号线 {
    background-color: #006098;
    color: white;
}

.filter-tag[data-line="3号线"].active,
.line-3号线 {
    background-color: #e60033;
    color: white;
}

.filter-tag[data-line="4号线大兴线"].active,
.line-4号线大兴线 {
    background-color: #008e9c;
    color: white;
}

.filter-tag[data-line="5号线"].active,
.line-5号线 {
    background-color: #a6217f;
    color: white;
}

.filter-tag[data-line="6号线"].active,
.line-6号线 {
    background-color: #d29700;
    color: white;
}

.filter-tag[data-line="7号线"].active,
.line-7号线 {
    background-color: #fac671;
    color: #001d31;
}

.filter-tag[data-line="8号线"].active,
.line-8号线 {
    background-color: #009b6b;
    color: white;
}

.filter-tag[data-line="9号线"].active,
.line-9号线 {
    background-color: #8fc31f;
    color: #001d31;
}

.filter-tag[data-line="10号线"].active,
.line-10号线 {
    background-color: #009bc0;
    color: white;
}

.filter-tag[data-line="11号线"].active,
.line-11号线 {
    background-color: #ed796b;
    color: white;
}

.filter-tag[data-line="12号线"].active,
.line-12号线 {
    background-color: #c76b00;
    color: white;
}

.filter-tag[data-line="13号线"].active,
.line-13号线 {
    background-color: #f9e700;
    color: #001d31;
}

.filter-tag[data-line="14号线"].active,
.line-14号线 {
    background-color: #d5a7a1;
    color: #001d31;
}

.filter-tag[data-line="15号线"].active,
.line-15号线 {
    background-color: #6a357d;
    color: white;
}

.filter-tag[data-line="16号线"].active,
.line-16号线 {
    background-color: #76a32d;
    color: white;
}

.filter-tag[data-line="17号线"].active,
.line-17号线 {
    background-color: #00a9a9;
    color: white;
}

.filter-tag[data-line="18号线"].active,
.line-18号线 {
    background-color: #5654a2;
    color: white;
}

.filter-tag[data-line="19号线"].active,
.line-19号线 {
    background-color: #d6abc1;
    color: #001d31;
}

.filter-tag[data-line="亦庄线"].active,
.line-亦庄线 {
    background-color: #e40077;
    color: white;
}

.filter-tag[data-line="房山线"].active,
.line-房山线 {
    background-color: #e46022;
    color: white;
}

.filter-tag[data-line="燕房线"].active,
.line-燕房线 {
    background-color: #e46022;
    color: white;
}

.filter-tag[data-line="S1线"].active,
.line-S1线 {
    background-color: #b25921;
    color: white;
}

.filter-tag[data-line="昌平线"].active,
.line-昌平线 {
    background-color: #de82b2;
    color: #001d31;
}

.filter-tag[data-line="西郊线"].active,
.line-西郊线 {
    background-color: #e6081b;
    color: white;
}

.filter-tag[data-line="亦庄T1线"].active,
.line-亦庄T1线 {
    background-color: #e6081b;
    color: white;
}

.filter-tag[data-line="首都机场线"].active,
.line-首都机场线 {
    background-color: #a29bbb;
    color: #001d31;
}

.filter-tag[data-line="大兴机场线"].active,
.line-大兴机场线 {
    background-color: #004ba0;
    color: white;
}

.line-tag {
    display: inline-block;
    margin-left: 5px;
    padding: 1px 6px;
    border-radius: 10px;
    font-size: 11px;
    white-space: nowrap;
    vertical-align: middle;
}

.filter-modes {
    display: none;
    align-items: center;
    gap: 10px;
}

.filter-modes.visible {
    display: flex;
}

.mode-label {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 600;
}

.compare-controls {
    display: flex;
    align-items: center;
    gap: 5px;
    background-color: var(--filter-toolbar-bg);
    padding: 5px 15px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.compare-info {
    font-size: 13px;
    font-weight: bold;
    color: var(--primary-color);
}

/* 
   =========================================
   13. 帮助与信息 (Help & Info)
   ========================================= 
*/
.info-card {
    background: linear-gradient(120deg, var(--primary-color), #003366);
    color: white;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    margin-top: 30px;
}

.info-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
    color: white;
    border-bottom: none;
}

.info-card h3::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: #3498db;
    margin: 8px auto 0;
}

.info-card p {
    opacity: 0.9;
    font-size: 15px;
    margin-bottom: 15px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.info-card a {
    color: #3498db;
    text-decoration: underline;
}

/* 帮助弹窗 */
.help-container {
    max-height: 70vh;
    overflow-y: auto;
    padding: 0px 25px 20px 25px;
    text-align: left;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    box-sizing: border-box;
    color: var(--text-main);
}

.help-container::-webkit-scrollbar {
    width: 6px;
}

.help-container::-webkit-scrollbar-track {
    background: transparent;
}

.help-container::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.help-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.help-icon-img {
    width: 60px;
    height: 60px;
}

.help-title-group h3 {
    margin: 0 0 5px 0;
    font-size: 18px;
    color: var(--text-main);
}

.help-title-group p {
    margin: 0;
    font-size: 12px;
    color: var(--text-light);
}

.help-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.help-card {
    background-color: var(--help-code-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    color: var(--text-main);
}

.help-card-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.help-card h4 {
    margin: 0 0 5px 0;
    font-size: 13px;
    color: var(--text-main);
    font-weight: bold;
}

.help-card ul {
    margin: 0;
    padding-left: 12px;
    color: var(--text-light);
    font-size: 11px;
    line-height: 1.5;
}

.help-link-btn {
    display: flex;
    justify-content: space-between !important;
    align-items: center;
    background-color: var(--card-bg);
    color: var(--text-main);
    padding: 12px 15px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
    transition: background 0.2s;
    text-align: left;
}

.help-link-btn:hover {
    background-color: var(--btn-info-hover);
}

.help-link-btn.primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.help-link-btn.primary:hover {
    background-color: var(--primary-hover);
}

.btn-arrow {
    font-size: 12px;
    transform: scaleX(0.8);
}

.help-data-info {
    background-color: var(--help-code-bg);
    padding: 12px;
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.6;
    margin: 15px 0;
    border: 1px solid var(--border-color);
}

.help-footer {
    text-align: center;
    font-size: 11px;
    color: var(--text-light);
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    line-height: 1.8;
}

.help-footer a {
    color: var(--text-light);
}

.help-footer img {
    width: 14px;
    vertical-align: middle;
    margin-right: 2px;
}

/* 
   =========================================
   14. 文章页特定样式 (change.html)
   ========================================= 
*/
.article-content {
    line-height: 1.8;
    color: var(--text-main);
}

.article-content h2 {
    color: var(--primary-color);
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.5rem;
}

.article-content h3 {
    color: var(--primary-hover);
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.article-content h4 {
    color: var(--text-light);
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

.article-content ul {
    padding-left: 20px;
    margin-bottom: 15px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content p {
    margin-bottom: 15px;
    text-align: justify;
}

.disclaimer {
    background-color: rgba(255, 243, 205, 0.2);
    border: 1px solid rgba(255, 238, 186, 0.3);
    color: #856404;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

[data-theme="dark"] .disclaimer {
    color: #ffd970;
}

.font-demo-a {
    font-family: "Segoe UI", sans-serif;
}

.modern-table td {
    font-family: 'Arimo', 'Arial', sans-serif;
    font-size: 0.9rem;
}

/* 
   =========================================
   15. 响应式适配 (Mobile)
   ========================================= 
*/
@media (max-width: 720px) {
    .tab-item {
        padding: 10px 15px;
        font-size: 13px;
    }

    .viewer-actions {
        flex-direction: column;
    }

    .viewer-actions .btn,
    .viewer-actions .ctrl-btn {
        width: 100%;
        justify-content: center;
    }

    .pdf-wrapper {
        padding: 10px;
    }

    .pdf-controls {
        flex-wrap: wrap;
    }

    .ctrl-btn {
        flex: 1 1 40%;
        font-size: 12px;
    }

    .filter-tags {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 5px;
        flex-wrap: nowrap;
    }

    .filter-tag {
        flex-shrink: 0;
    }

    .filter-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .app-title {
        font-size: 0.95rem;
    }

    .header-logo {
        height: 24px;
    }

    .btn span {
        display: none;
    }

    .btn {
        padding: 6px;
    }

    .viewer-actions .btn,
    .pdf-controls .ctrl-btn,
    .viewer-actions .btn span,
    .pdf-controls .ctrl-btn span,
    .pdf-controls .btn span {
        display: inline;
        padding: 0 15px;
        height: 36px;
        width: 100%;
    }

    .tool-header {
        padding: 8px 10px;
    }

    .image-display-area {
        min-height: 250px;
    }

    .page-title {
        font-size: 24px;
    }

    .tool-card {
        padding: 20px;
    }

    .header-right span {
        display: none;
    }

    .bottom-bar .footer-content,
    .tool-footer .footer-items {
        display: flex !important;
        flex-direction: column !important;
        gap: 2px !important;
        line-height: 1.3 !important;
        padding: 5px 0 !important;
    }

    .bottom-bar,
    .tool-footer {
        height: auto !important;
        min-height: 60px;
    }

    .bottom-bar,
    .tool-footer,
    .footer-content span,
    .footer-items span,
    .footer-content a,
    .footer-items a {
        font-size: 10px !important;
    }

    .beian-icon {
        height: 10px !important;
        width: auto !important;
        vertical-align: middle !important;
        margin-right: 2px !important;
    }

    /* 移动端去内边距 */


    /* 通用卡片扁平化 */
    .tool-card {
        border-radius: 0;
        box-shadow: none;
        margin-bottom: 10px;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
        padding: 20px 15px;
    }

    /* 特殊处理：图片查看器 (完全无边距) */
    .image-viewer-card {
        padding: 0 !important;
        border: none;
    }

    /* 特殊处理：表格卡片 */
    .table-container,
    .table-responsive {
        border-radius: 0;
        box-shadow: none;
        border: none;
    }

    /* 特殊处理：筛选器卡片 */
    .filter-card {
        padding: 15px 10px !important;
    }

    /* 特殊处理：底部说明卡 */
    .info-card {
        border-radius: 0;
        margin-top: 0;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* PDF容器适配 */
    .pdf-wrapper {
        border-radius: 0;
        box-shadow: none;
        padding: 10px 0;
    }

    .enmap-container {
        padding: 0;
        height: calc(100vh - 120px);
    }

    .enmap-container .pdf-wrapper {
        border-radius: 0;
        box-shadow: none;
        padding: 10px 0;
    }
}

/* 英文地图专用高度修正 */
.enmap-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 100px);
}

/* 
   =========================================
   16. 提示框 (Tooltip for Theme Reset)
   ========================================= 
*/
#theme-reset-tooltip {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    pointer-events: none;
    z-index: 11000;
    /* 确保高于 header 和 modal */
    opacity: 0;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] #theme-reset-tooltip {
    background-color: rgba(255, 255, 255, 0.9);
    color: #000;
}

#theme-reset-tooltip.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}