:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --danger: #f72585;
    --warning: #f8961e;
    --gray: #6c757d;
    --gray-light: #adb5bd;
    --border-radius: 12px;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    overflow: hidden;
}

/* --- 地图与容器 --- */
#map {
    height: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 0;
}

/* --- 画板模式相关样式 --- */
.board-container {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: #f0f0f0;
    overflow: hidden;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    user-select: none;
}

.board-container.hidden { display: none; }
.board-container.active { display: block; z-index: 10; }

#boardContent {
    position: absolute;
    transform-origin: 0 0;
    will-change: transform;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

#boardImage {
    display: block;
    pointer-events: none;
    max-width: none;
}

.board-placeholder {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #aaa;
    pointer-events: none;
}

.board-placeholder i { font-size: 64px; margin-bottom: 20px; }
.board-placeholder p { font-size: 18px; }

#uploadImgBtn { position: relative; overflow: hidden; }
#uploadImgBtn input[type=file] {
    position: absolute; left: 0; top: 0;
    width: 100%; height: 100%;
    opacity: 0; cursor: pointer;
}

/* --- 画布样式 --- */
#heatmapCanvas {
    position: absolute; left: 0; top: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    touch-action: none;
    z-index: 100;
    transform-origin: 0 0;
    will-change: transform;
}
#heatmapCanvas.drawing { pointer-events: auto; cursor: crosshair; }

/* --- 右侧工具栏 --- */
.toolbar {
    position: absolute; right: 20px; top: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    z-index: 999;
    width: 320px;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}
.toolbar:hover { transform: translateY(-2px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15); }
.toolbar.minimized {
    width: 40px; height: 40px; padding: 0; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
}
.toolbar.minimized .toolbar-content { display: none; }
.toolbar.minimized .toolbar-minimize-icon {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%; cursor: pointer;
    font-size: 24px; color: var(--primary);
}
.toolbar-minimize-icon { display: none; }

.toolbar-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px;
}
.toolbar-header h3 {
    margin: 0; font-size: 18px; color: var(--dark); font-weight: 600;
    display: flex; align-items: center; gap: 10px;
}
.toolbar-header h3 i { color: var(--primary); }
.toolbar-actions { display: flex; gap: 10px; }

.toolbar-action-btn {
    background: none; border: none; cursor: pointer;
    color: var(--gray); font-size: 16px; padding: 5px;
    border-radius: 4px; transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; flex: none !important; min-width: auto !important;
}
.toolbar-action-btn:hover { background: rgba(0, 0, 0, 0.05); color: var(--dark); }

.row { display: flex; align-items: center; margin: 12px 0; gap: 10px; }
.row label { flex: 1; font-size: 14px; font-weight: 500; color: var(--dark); }
.row input[type=range] {
    flex: 2; -webkit-appearance: none; height: 6px; border-radius: 5px;
    background: linear-gradient(to right, var(--primary), var(--secondary)); outline: none;
}
.row input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 18px; height: 18px;
    border-radius: 50%; background: var(--light);
    border: 2px solid var(--primary); cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); transition: var(--transition);
}
.row input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); background: var(--primary); }
.value-display {
    width: 65px; min-width: 65px; text-align: center; font-size: 13px; font-weight: 600;
    color: var(--primary); background: rgba(67, 97, 238, 0.1); padding: 4px 0;
    border-radius: 20px; flex-shrink: 0;
}

/* --- 底部工具栏 --- */
.bottom-toolbar {
    position: absolute; bottom: 20px; left: 50%;
    transform: translateX(-50%); z-index: 999;
    transition: var(--transition);
    display: flex; gap: 10px;
}

button {
    flex: 1; min-width: 120px; padding: 10px 15px;
    border-radius: var(--border-radius); border: none;
    background: var(--light); color: var(--dark);
    cursor: pointer; font-weight: 600; font-size: 14px;
    transition: var(--transition);
    display: flex; align-items: center; justify-content: center; gap: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
button:hover { transform: translateY(-2px); box-shadow: 0 5px 10px rgba(0, 0, 0, 0.15); }
.file-input-wrapper { position: relative; overflow: hidden; display: inline-block; width: 100%; }
.file-input-wrapper input[type=file] {
    position: absolute; left: 0; top: 0; opacity: 0; width: 100%; height: 100%; cursor: pointer;
}
.file-input-wrapper:hover {
    transform: translateY(-2px); box-shadow: 0 5px 10px rgba(0, 0, 0, 0.15); border-radius: var(--border-radius);
}

button.primary { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: white; }
button.primary:hover { background: linear-gradient(135deg, var(--primary-dark), #6507a3); }
button.danger { background: var(--danger); color: white; }
button.danger:hover { background: #e01a6f; }
button.warning { background: var(--warning); color: white; }
button.warning:hover { background: #e6891e; }
button.success { background: var(--success); color: white; }
button.success:hover { background: #3ab8d9; }
button:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* --- 左侧缩放控制区域 --- */
.zoom-controls {
    position: absolute; left: 20px; top: 20px;
    row-gap: 5px; border-radius: var(--border-radius);
    z-index: 999; display: flex; flex-direction: column; overflow: hidden;
}

/* 按钮样式统一 */
.zoom-btn, .style-btn, .help-btn {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: white; border: none; cursor: pointer;
    transition: var(--transition); color: var(--dark);
    flex: none !important; min-width: auto !important; padding: 0 !important;
}
.zoom-btn:hover, .style-btn:hover, .help-btn:hover { background: var(--light); }

/* 分隔线处理 */
.zoom-controls button { border-bottom: 1px solid rgba(0, 0, 0, 0.1); }
.help-btn { border-bottom: none; }

/* --- 色带 --- */
.color-legend {
    margin-top: 15px; background: rgba(255, 255, 255, 0.9); padding: 15px;
    border-radius: var(--border-radius); box-shadow: var(--shadow); width: 100%;
}
.color-legend h4 { margin: 0 0 10px 0; font-size: 14px; color: var(--dark); display: flex; align-items: center; gap: 8px; }

.legend-labels { display: flex; justify-content: space-between; font-size: 10px; color: var(--gray); }

/* --- 图层管理工具栏 --- */
.layer-toolbar {
    position: absolute; right: 20px; top: 350px;
    background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px);
    padding: 20px; border-radius: var(--border-radius);
    box-shadow: var(--shadow); z-index: 999;
    width: 320px; transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-height: calc(100vh - 400px); overflow-y: auto;
}
.layer-toolbar:hover { transform: translateY(-2px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15); }
.layer-toolbar.minimized {
    width: 40px; height: 40px; padding: 0; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}
.layer-toolbar.minimized .layer-toolbar-content { display: none; }
.layer-toolbar.minimized .layer-minimize-icon {
    display: flex; align-items: center; justify-content: center;
    width: 100%; height: 100%; cursor: pointer;
    font-size: 24px; color: var(--primary);
}
.layer-minimize-icon { display: none; }
.layer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.layer-header h3 { margin: 0; font-size: 18px; color: var(--dark); font-weight: 600; display: flex; align-items: center; gap: 10px; }
.layer-header h3 i { color: var(--primary); }
.layer-actions { display: flex; gap: 10px; align-items: center; }
.layer-list { max-height: 200px; overflow-y: auto; margin-bottom: 10px; }
.layer-action-btn,
.close-modal {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray);
    font-size: 16px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* 核心修复：强制覆盖全局button样式 */
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important; /* 强制覆盖全局的120px最小宽度 */
    flex: none !important;      /* 禁止自动伸缩 */
    padding: 0 !important;      /* 清除全局内边距 */
    margin: 0 !important;
}

.layer-action-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--dark);
}

.layer-item {
    display: flex; align-items: center; padding: 8px; margin-bottom: 5px;
    background: #f8f9fa; border-radius: 8px; transition: var(--transition);
    min-height: 40px; gap: 10px;
}
.layer-item:hover { background: #e9ecef; }
.layer-item.current { background: rgba(67, 97, 238, 0.1); border-left: 3px solid var(--primary); }
.layer-name, .layer-name-input { flex: 1; font-size: 13px; min-width: 0; max-width: 180px; }
.layer-name { font-weight: 500; cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-name-input { padding: 4px 8px; border: 1px solid var(--primary); border-radius: 4px; outline: none; flex-shrink: 1; }
.layer-item-actions { display: flex; gap: 5px; align-items: center; flex-shrink: 0; width: auto; }
.layer-item-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray);
    font-size: 12px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* 核心修复：同样强制固定宽高 */
    width: 24px !important;
    height: 24px !important;
    min-width: 24px !important;
    flex: none !important;
    padding: 0 !important;
}

.layer-item-action-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--dark);
}
.layer-item-action-btn.delete:hover { color: var(--danger); }
.layer-item-action-btn.export:hover { color: var(--success); }
.layer-item-action-btn.rename:hover { color: var(--primary); }

.ios-toggle {
    position: relative; width: 40px; height: 24px; background-color: #e5e5e5;
    border-radius: 24px; cursor: pointer; transition: all 0.3s ease;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1); flex-shrink: 0;
}
.ios-toggle.active { background-color: var(--primary); }
.ios-toggle::before {
    content: ''; position: absolute; top: 2px; left: 2px;
    width: 20px; height: 20px; background-color: white; border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}
.ios-toggle.active::before { transform: translateX(16px); }
.heatmap-toggle {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 15px; padding: 8px 0; border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}
.heatmap-toggle-label { font-size: 14px; font-weight: 500; color: var(--dark); white-space: nowrap; }

/* --- 模态框通用 --- */
.modal {
    display: none; position: fixed; top: 0; left: 0;
    width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5);
    z-index: 1000; justify-content: center; align-items: center;
}
.modal-content {
    background: white; padding: 25px; border-radius: var(--border-radius);
    box-shadow: var(--shadow); width: 90%; max-width: 500px;
    max-height: 80vh; overflow-y: auto;
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.modal-header h3 { margin: 0; color: var(--dark); }
.close-modal {
    background: none; border: none; font-size: 20px; cursor: pointer;
    color: var(--gray); width: 32px; height: 32px; flex: none !important;
}

/* --- 全局提示框 (替代Alert/Confirm) --- */
.global-modal-content { max-width: 400px; text-align: center; padding: 30px; }
.modal-body { margin: 20px 0; font-size: 15px; color: var(--dark); line-height: 1.6; }
.modal-body .highlight { color: var(--primary); font-weight: 600; margin: 0 4px; }
.modal-buttons { display: flex; justify-content: center; gap: 15px; margin-top: 25px; }
.modal-buttons button { min-width: 100px; flex: 0 1 auto; }
button.secondary { background: #e9ecef; color: var(--dark); }
button.secondary:hover { background: #dee2e6; }

/* --- JSON预览 --- */
.json-preview {
    background: #f8f9fa; padding: 15px; border-radius: 8px; font-family: monospace;
    font-size: 12px; max-height: 300px; overflow-y: auto;
    white-space: pre-wrap; margin-bottom: 15px;
}

/* --- 导出选项 (重构后) --- */
.export-modal-content { max-width: 400px; }
.export-options { margin: 20px 0; }

.export-option-group {
    margin-bottom: 10px;
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
}
.export-option-group:hover { background: #e9ecef; }
.export-option-group:has(input[name="bgType"]:checked) {
    border-color: var(--primary);
    background: rgba(67, 97, 238, 0.05);
}

.export-option {
    display: flex; align-items: center; padding: 12px;
    cursor: pointer; margin-bottom: 0; background: transparent;
}
.export-option input { margin-right: 10px; }
.export-option label { flex: 1; cursor: pointer; font-weight: 500; }
.export-option .description { font-size: 12px; color: var(--gray); margin-top: 4px; }

/* 二级菜单样式 (分辨率选择) */
.nested-options {
    padding: 0 12px 12px 42px; /* 缩进 */
    display: none; /* 默认隐藏 */
    animation: slideDown 0.2s ease-out;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}
.nested-label { font-size: 12px; color: var(--gray); margin-bottom: 5px; font-weight: 600; }
.nested-radios { display: flex; gap: 15px; }
.radio-inline { display: flex; align-items: center; font-size: 13px; cursor: pointer; color: var(--dark); }
.radio-inline input { margin-right: 6px; }
.radio-inline span { padding-top: 1px; }

/* --- 导出菜单 --- */
.export-menu {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: white; border-radius: var(--border-radius); box-shadow: var(--shadow);
    padding: 20px; z-index: 1000; min-width: 300px; display: none; text-align: center;
}
.export-menu .qrcode-section {
    display: flex; flex-direction: column; align-items: center; text-align: center;
    padding: 15px; background: rgba(67, 97, 238, 0.05); border-radius: var(--border-radius); margin-bottom: 15px;
}
.export-menu-buttons { display: flex; flex-direction: column; gap: 10px; margin-top: 15px; }
.export-menu-buttons button { width: 100%; justify-content: center; margin-bottom: 0; transition: all 0.3s ease; }

/* --- 帮助模态框 --- */
.help-modal-content { max-width: 700px; }
.help-section h4 { font-size: 16px; color: var(--primary); display: flex; align-items: center; gap: 8px; }
.help-text { padding: 0 15px; border-radius: 8px; font-size: 14px; line-height: 1.5; }
.help-text p { margin: 10px 0 5px 0; font-weight: 600; color: var(--dark); }
.help-text ul { margin: 5px 0 15px 15px; color: var(--gray); }
.help-text li { margin-bottom: 5px; }
.help-content.horizontal-layout { display: flex; gap: 20px; align-items: stretch; }
.help-content.horizontal-layout .help-section { flex: 1; display: flex; flex-direction: column; }
.help-content.horizontal-layout .help-text-section { flex: 2; padding: 15px; background: rgba(67, 97, 238, 0.05); border-radius: var(--border-radius); }
.qrcode-container { display: flex; flex-direction: column; align-items: center; gap: 10px; width: 100%; padding: 10px 0; }
.qrcode-image {
    width: 150px; height: 150px; background: #f5f5f5; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    color: var(--gray); font-size: 12px; border: 1px dashed var(--gray-light); overflow: hidden; margin: 5px 0;
}
.qrcode-text { font-size: 12px; color: var(--gray); font-weight: 500; margin-top: 5px; }

@media (max-width: 768px) {
    .help-content.horizontal-layout { flex-direction: column; }
}

/* --- 网站标题与浮动控件 --- */
.site-header {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    min-width: 300px;
    height: 80px;
    background: linear-gradient(135deg, #4361ee 0%, #7209b7 100%);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0 0 30px 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0 40px;
}

.site-title-container {
    text-align: center;
    color: white;
    padding: 10px 0;
}
.site-title {
    font-size: 22px; font-weight: 700; margin: 0; text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px; background: linear-gradient(45deg, #ffffff, #f8f9fa);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.site-subtitle { font-size: 14px; margin: 5px 0 0 0; opacity: 0.9; font-weight: 500; letter-spacing: 2px; text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3); }

.history-controls-floating {
    position: fixed; top: 90px; left: 50%; transform: translateX(-50%);
    z-index: 999; display: flex; padding: 8px; gap: 10px; align-items: center;
    background: rgba(71, 71, 71, 0.5); border-radius: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, 0.5);
}
.history-points-display {
    display: flex; align-items: center; justify-content: center; gap: 5px;
    color: white; font-size: 18px; font-weight: 600; min-width: 50px; text-align: center; user-select: none;
}
.history-points-display i { font-size: 10px; color: #4cc9f0; opacity: 0.9; }
.history-btn {
    width: 36px; height: 36px; min-width: auto; padding: 0; border-radius: 50%;
    background: white; border: 1px solid #eee; color: var(--primary);
    font-size: 14px; cursor: pointer; transition: all 0.2s ease;
    display: flex; align-items: center; justify-content: center;
}
.history-btn:hover:not(:disabled) { transform: scale(1.1); background: var(--primary); color: white; border-color: var(--primary); }
.history-btn:disabled { background: #f5f5f5; color: #ccc; cursor: not-allowed; box-shadow: none; border-color: #eee; }

/* --- 帮助气泡 --- */
.help-tooltip {
    position: fixed; background: rgba(33, 37, 41, 0.95); color: white;
    padding: 8px 12px; border-radius: 6px; font-size: 12px; font-weight: 500;
    pointer-events: none; z-index: 2000; white-space: nowrap;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3); border: 1px solid rgba(255, 255, 255, 0.2); opacity: 0;
}
.help-tooltip::before { content: ''; position: absolute; width: 0; height: 0; border-style: solid; }
.help-tooltip[data-position="right"] { transform: translate(10px, -50%); animation: fadeInRight 0.3s forwards; }
.help-tooltip[data-position="right"]::before { left: -6px; top: 50%; transform: translateY(-50%); border-width: 6px 6px 6px 0; border-color: transparent rgba(33, 37, 41, 0.95) transparent transparent; }
@keyframes fadeInRight { from { opacity: 0; transform: translate(0px, -50%) scale(0.8); } to { opacity: 1; transform: translate(10px, -50%) scale(1); } }
.help-tooltip[data-position="left"] { transform: translate(calc(-100% - 10px), -50%); animation: fadeInLeft 0.3s forwards; }
.help-tooltip[data-position="left"]::before { right: -6px; top: 50%; transform: translateY(-50%); border-width: 6px 0 6px 6px; border-color: transparent transparent transparent rgba(33, 37, 41, 0.95); }
@keyframes fadeInLeft { from { opacity: 0; transform: translate(calc(-100% + 0px), -50%) scale(0.8); } to { opacity: 1; transform: translate(calc(-100% - 10px), -50%) scale(1); } }
.help-tooltip[data-position="top"] { transform: translate(-50%, calc(-100% - 10px)); animation: fadeInTop 0.3s forwards; }
.help-tooltip[data-position="top"]::before { bottom: -6px; left: 50%; transform: translateX(-50%); border-width: 6px 6px 0 6px; border-color: rgba(33, 37, 41, 0.95) transparent transparent transparent; }
@keyframes fadeInTop { from { opacity: 0; transform: translate(-50%, calc(-100% + 0px)) scale(0.8); } to { opacity: 1; transform: translate(-50%, calc(-100% - 10px)) scale(1); } }
.help-btn.active { background: var(--primary); color: white; }

/* 风格选择网格 */
.style-modal-content { max-width: 600px; }
.style-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 15px; padding: 10px 0; max-height: 60vh; overflow-y: auto; }
.style-item { cursor: pointer; border-radius: 8px; overflow: hidden; transition: var(--transition); border: 2px solid transparent; background: #f8f9fa; }
.style-item:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1); }
.style-item.active { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2); }
.style-preview { height: 80px; width: 100%; position: relative; background: #eee; }
.style-name { padding: 8px; font-size: 13px; text-align: center; font-weight: 500; color: var(--dark); background: white; }

/* --- 在 styles.css 末尾添加或修改以下样式 --- */

/* 让主色带可点击，并添加鼠标悬停效果 */
.gradient-bar {
    height: 15px; 
    width: 100%; 
    border-radius: 50px !important; /* 强制大圆角 */
    /* 默认背景，JS加载后会被覆盖 */
    background: linear-gradient(to right, rgba(0, 0, 0, 0) 0%, #0000ff 20%, #00ffff 40%, #00ff00 60%, #ffff00 80%, #ff0000 100%);
    margin-bottom: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.gradient-bar:hover {
    transform: scale(1.02);
    /* 悬停时加深描边和投影 */
    box-shadow: 
        0 4px 8px rgba(0,0,0,0.15), 
        inset 0 0 0 1px rgba(0,0,0,0.2) 
        !important;
}

.gradient-bar, 
.gradient-option-preview {
    /* 核心修复：去除 border，防止背景被挤压出现空隙 */
    border: none !important; 
    
    /* 强制胶囊圆角 */
    border-radius: 50px !important; 
    
    /* 核心修复：使用 inset 阴影模拟 1px 边框，不会占据物理空间 */
    box-shadow: 
        0 2px 4px rgba(0,0,0,0.1),         /* 外部投影 (立体感) */
        inset 0 0 0 1px rgba(0,0,0,0.1)    /* 内部描边 (模拟边框) */
        !important;
        
    /* 确保背景撑满 */
    background-origin: border-box !important;
    background-clip: border-box !important;
}

/* 在 styles.css 中找到 .gradient-dropdown，将其替换为以下内容 */

/* 下拉菜单容器 */
.gradient-dropdown {
    display: none; 
    position: fixed; /* 改为固定定位，相对于浏览器窗口 */
    top: 0;          /* 初始值，JS会动态计算 */
    left: 0;         /* 初始值，JS会动态计算 */
    /* width: 由JS动态设置为与色带同宽 */
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.25); /* 加深阴影使其更明显 */
    padding: 8px;
    z-index: 9999; /* 确保层级高于工具栏 (999) */
    max-height: 300px;
    overflow-y: auto;
    animation: fadeIn 0.15s ease-out;
    margin-top: 5px; /* 与色带保持一点距离 */
}

.gradient-dropdown.show {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 在 styles.css 末尾添加 --- */

.add-gradient-btn {
    width: 100% !important;
    background: #f8f9fa;
    border: 1px dashed #ccc;
    color: var(--primary);
}
.add-gradient-btn:hover {
    background: #edf2ff;
    border-color: var(--primary);
}

.gradient-option {
    display: flex !important;
    flex-direction: column !important; /* 强制垂直排列 */
    align-items: flex-start !important;
    padding: 8px !important;
    height: auto !important;
}

/* 鼠标滑过反馈 */
.gradient-option:hover {
    background-color: #f0f2f5; /* 浅灰色背景 */
    border-color: rgba(0,0,0,0.05);
}

/* 选中状态 */
.gradient-option.active {
    background: rgba(67, 97, 238, 0.08);
    border-color: var(--primary);
}

/* 2. 顶部行：名称 + 按钮组 */
.gradient-top-row {
    display: flex !important;
    flex-direction: row !important; /* 强制水平排列 */
    justify-content: space-between !important; /* 两端对齐：名称在左，按钮在右 */
    align-items: center !important;
    width: 100% !important;
    margin-bottom: 5px !important;
    position: relative !important; /* 建立定位上下文 */
}

/* 3. 名称：占据剩余空间 */
.gradient-option-name {
    font-size: 14px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 10px; /* 防止和按钮挨太近 */
}

/* 4. 按钮组容器：强制取消绝对定位 */
.gradient-item-actions {
    display: none; /* 默认隐藏 */
    position: static !important; /* 【核心修复】取消之前的 absolute，回归文档流 */
    transform: none !important;  /* 取消位移 */
    top: auto !important;
    right: auto !important;
    flex-direction: row !important;
    gap: 5px !important;
    align-items: center !important;
}

/* 悬停时显示为 Flex */
.gradient-option:hover .gradient-item-actions {
    display: flex !important;
}

/* 5. 迷你按钮：强制覆盖全局大按钮样式 */
.mini-btn {
    width: 24px !important;
    height: 24px !important;
    min-width: 24px !important; /* 【核心修复】覆盖全局的 120px */
    max-width: 24px !important;
    padding: 0 !important;
    margin: 0 !important;
    flex: none !important;      /* 禁止伸缩 */
    font-size: 12px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    border-radius: 4px !important;
}

/* 6. 预览色带：占满下方 */
.gradient-option-preview {
    width: 100% !important;
    height: 12px !important;
    border-radius: 50px !important; /* 强制大圆角 */
    margin-top: 0 !important;
}

/* 3. 编辑器模态框样式 */
.gradient-modal-content {
    max-width: 450px;
}
.full-width-input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 15px;
}
.stops-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px;
}
.gradient-stops-list {
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid #eee;
    padding: 10px;
    border-radius: 4px;
    background: #f9f9f9;
}
.stop-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    background: white;
    padding: 5px;
    border-radius: 4px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.stop-pos-input {
    width: 60px;
    padding: 4px;
    border: 1px solid #ddd;
    border-radius: 4px;
}
.stop-color-input {
    flex: 1;
    height: 30px;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
}
.editor-preview-label { font-size: 12px; color: #666; margin-bottom: 5px; }

/* --- 1. 标题栏与新建按钮样式 --- */
.legend-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.legend-header h4 {
    margin: 0;
    font-size: 14px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}
.header-icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    
    /* 核心修复：使用 !important 覆盖全局 button 的 flex:1 和 min-width */
    width: 28px !important;
    height: 28px !important;
    min-width: 28px !important; 
    flex: none !important; 
    padding: 0 !important;
    
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    margin-left: 8px; /* 与文字拉开距离 */
}
.header-icon-btn:hover {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary-dark);
}

/* --- PS风格渐变编辑器样式 --- */

.ps-editor-container {
    margin-bottom: 20px;
    padding: 0 6px !important; /* 稍微增加一点左右内边距 */
    user-select: none;
}

/* 轨道背景 (棋盘格，用于显示透明度，虽然目前全是实色，保留风格) */
.ps-track-bg {
    height: 20px;
    background-image: 
        linear-gradient(45deg, #ccc 25%, transparent 25%), 
        linear-gradient(-45deg, #ccc 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #ccc 75%), 
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    background-color: white;
    border-radius: 50px !important;
    overflow: hidden !important; /* 裁剪内部内容，确保棋盘格不溢出 */
    border: 1px solid #ccc !important; /* 这里保留物理边框即可，配合 overflow 使用 */
}

#psGradientPreview {
    border-radius: 50px !important;
}

/* 渐变预览条 */
.ps-track {
    width: 100%;
    height: 100%;
}

/* 滑块活动区域 */
.ps-stops-area {
    position: relative;
    height: 20px;
    margin-top: 2px;
    cursor: cell; /* 提示可以点击添加 */
}

/* 单个滑块节点 */
.ps-stop-handle {
    position: absolute;
    top: 0;
    width: 12px;
    height: 14px;
    margin-left: -6px; /* 居中定位 */
    cursor: grab;
    z-index: 10;
}

/* 滑块形状：三角形尖顶 + 矩形底座 */
.ps-stop-handle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid black; /* 默认黑色边框 */
}
.ps-stop-handle::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 0;
    width: 10px;
    height: 9px;
    background-color: var(--stop-color, #fff); /* 动态颜色 */
    border: 1px solid black;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

/* 选中状态 */
.ps-stop-handle.active {
    z-index: 100;
}
.ps-stop-handle.active::before { border-bottom-color: var(--primary); }
.ps-stop-handle.active::after { border-color: var(--primary); }

/* 下方控制区 */
.ps-controls {
    background: #f8f9fa;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #eee;
    transition: opacity 0.2s;
}
.ps-controls.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 15px;
}
.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}
.input-suffix-wrapper {
    display: flex;
    align-items: center;
    background: white;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 0 4px;
    width: 70px;
}
.input-suffix-wrapper input {
    border: none;
    width: 100%;
    outline: none;
    text-align: right;
    font-size: 13px;
    padding: 4px 2px;
}
.color-picker-wrapper input[type="color"] {
    width: 40px;
    height: 26px;
    border: 1px solid #ccc;
    padding: 1px;
    background: white;
    border-radius: 4px;
    cursor: pointer;
}
.help-tip {
    font-size: 11px;
    color: #999;
    margin-top: 8px;
}

/* 3. 编辑器里的预览条 (可选，保持统一风格) */
.ps-track-bg, .ps-track {
    border-radius: 4px; /* 编辑器里通常保持微圆角，方便对齐，这里保持 4px 即可，或者你也想改成 50px */
}

/* 移动端适配 (防止遮挡) */
@media (max-width: 768px) {
    .more-tools-btn {
        bottom: 80px; /* 避开底部的操作栏 */
        right: 20px;
        padding: 10px 20px;
        font-size: 13px;
    }
}

/* --- 右下角更多工具胶囊按钮 (带呼吸效果) --- */

/* 1. 定义呼吸动画关键帧 */
@keyframes breathe {
    0% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    }
    50% {
        transform: scale(1.08); /* 放大 8% */
        box-shadow: 0 15px 30px rgba(67, 97, 238, 0.3); /* 阴影扩散，制造“浮起”感 */
    }
    100% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    }
}

.more-tools-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    
    border-radius: 50px; 
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    
    /* 初始阴影 */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(67, 97, 238, 0.1);
    
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(5px);

    /* 【关键】应用呼吸动画：时长3秒，无限循环，缓动效果 */
    animation: breathe 1s ease-in-out infinite;
}

/* 给按钮增加一个隐形的“光环”，扩大鼠标感应区域 */
.more-tools-btn::after {
    content: '';
    position: absolute;
    /* 向四周各扩大 15px，确保上浮 5px 时鼠标不会脱离 */
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px; 
    z-index: -1; /* 放在按钮背后，不影响点击 */
    border-radius: 60px; /* 保持圆角 */
}

.more-tools-btn i {
    font-size: 16px;
}

/* 悬停效果 */
.more-tools-btn:hover {
    /* 【关键】悬停时停止呼吸动画，防止冲突 */
    animation: none; 
    
    /* 保持放大和上浮的状态 */
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(67, 97, 238, 0.4);
    background: white;
    color: var(--primary);
    border-color: transparent;
}

/* 点击效果 */
.more-tools-btn:active {
    transform: translateY(-2px) scale(0.98);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .more-tools-btn {
        bottom: 80px;
        right: 20px;
        padding: 10px 20px;
        font-size: 13px;
        /* 移动端可以减弱呼吸幅度，避免遮挡视线 */
        animation: breathe 2s ease-in-out infinite;
    }
}