/* =========================================
           1. 文档站基础样式 (Docs System)
           ========================================= */
        :root {
            /* 文档站配色 - 日间模式 */
            --doc-bg: #f4f6f8;
            --doc-sidebar-bg: #ffffff;
            --doc-text-main: #2c3e50;
            --doc-text-light: #606f7b;
            --doc-primary: #007AFF;
            --doc-border: #e2e8f0;
            --doc-code-bg: #edf2f7;
            --doc-code-text: #c53030;
            --doc-info-bg: #e6f2ff;
            --doc-info-border: #b3d7ff;
            --doc-info-title: #0056b3;
            --doc-nav-hover-bg: #f0f7ff;
            --doc-nav-active-bg: #e6f2ff;
            --doc-nav-active-text: #007AFF;
            
            /* Blokko 核心变量复刻 (用于预览区) */
            --bg-card: #ffffff;
            --text-primary: #1a1a1a;
            --text-secondary: #555555;
            --color-primary: #007AFF;
            --bg-preview-page: #f0f2f5;
            --shadow-light: 0 4px 12px rgba(0,0,0,0.08);
            --g-comp-border-radius: 12px;
            --g-theme-accent: #007AFF;

            /* 新增：用于高级边框演示的变量 */
            --adv-border-color: #1a1a1a;
            --adv-border-offset: 4px;
        }

        /* 新增：夜间模式变量 */
        body.dark-mode {
            --doc-bg: #1a1d23;
            --doc-sidebar-bg: #242830;
            --doc-text-main: #e2e8f0;
            --doc-text-light: #94a3b8;
            --doc-primary: #38bdf8;
            --doc-border: #334155;
            --doc-code-bg: #334155;
            --doc-code-text: #f472b6;
            --doc-info-bg: #1e3a8a;
            --doc-info-border: #3b82f6;
            --doc-info-title: #93c5fd;
            --doc-nav-hover-bg: #1e2d48;
            --doc-nav-active-bg: #2563eb;
            --doc-nav-active-text: #ffffff;

            --bg-preview-page: #1e293b;
            --bg-card: #293140;
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --g-theme-accent: #38bdf8;
            --shadow-light: 0 4px 12px rgba(0,0,0,0.2);
            --adv-border-color: #f1f5f9;
        }


        * { box-sizing: border-box; }
        
        body {
            margin: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background: var(--doc-bg);
            color: var(--doc-text-main);
            display: flex;
            height: 100vh;
            overflow: hidden;
            transition: background-color 0.3s, color 0.3s;
        }

        /* 侧边栏 */
        .doc-sidebar {
            width: 260px;
            background: var(--doc-sidebar-bg);
            border-right: 1px solid var(--doc-border);
            display: flex;
            flex-direction: column;
            flex-shrink: 0;
            transition: transform 0.3s ease, background-color 0.3s, border-color 0.3s;
            z-index: 100;
        }

        .doc-logo {
            padding: 15px 25px;
            height: 80px;
            border-bottom: 1px solid var(--doc-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--doc-text-main);
        }
        .app-logo {
            height: 52px;
            width: auto;
        }

        .doc-nav {
            flex: 1;
            overflow-y: auto;
            padding: 20px;
        }

        .nav-group { margin-bottom: 25px; }
        .nav-title {
            font-size: 0.75rem;
            text-transform: uppercase;
            color: var(--doc-text-light);
            font-weight: 700;
            margin-bottom: 10px;
            padding-left: 10px;
            letter-spacing: 0.5px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            margin-bottom: 4px;
            border-radius: 8px;
            color: var(--doc-text-light);
            text-decoration: none;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.95rem;
        }

        .nav-item:hover { background-color: var(--doc-nav-hover-bg); color: var(--doc-primary); }
        .nav-item.active { background-color: var(--doc-nav-active-bg); color: var(--doc-nav-active-text); font-weight: 600; }
        .nav-item .iconify { font-size: 1.1rem; }

        /* 夜间模式切换器 */
        .theme-toggle-container {
            padding: 10px 20px;
            border-top: 1px solid var(--doc-border);
        }
        .theme-switch {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 12px;
            background: var(--doc-bg);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s;
        }
        .theme-switch:hover {
            border-color: var(--doc-primary);
        }
        .theme-switch span { font-weight: 600; }

        /* 主内容区 */
        .doc-main {
            flex: 1;
            overflow-y: auto;
            padding: 40px 60px;
            scroll-behavior: smooth;
        }

        .content-section { display: none; animation: fadeIn 0.3s ease; max-width: 900px; margin: 0 auto; }
        .content-section.active { display: block; }

        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

        h1 { font-size: 2.2rem; margin-bottom: 10px; color: var(--doc-text-main); border-bottom: 2px solid var(--doc-primary); padding-bottom: 15px; }
        h2 { font-size: 1.5rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 1px solid var(--doc-border); padding-bottom: 10px; color: var(--doc-text-main); }
        h3 { font-size: 1.2rem; margin-top: 30px; margin-bottom: 15px; color: var(--doc-text-main);}
        p { line-height: 1.7; margin-bottom: 15px; color: var(--doc-text-light); }
        code { background: var(--doc-code-bg); padding: 2px 6px; border-radius: 4px; font-family: monospace; color: var(--doc-code-text); }
        hr { border: 0; border-top: 1px solid var(--doc-border); margin: 35px 0; }
        ul, ol { padding-left: 20px; line-height: 1.8; color: var(--doc-text-light);}
        li { margin-bottom: 8px; }
        strong { color: var(--doc-text-main); }
        .info-box { background: var(--doc-info-bg); padding: 20px; border-radius: 12px; margin: 20px 0; border: 1px solid var(--doc-info-border); }
        .info-box h3 { margin-top: 0; color: var(--doc-info-title); }
        .info-box p, .info-box li { margin-bottom: 0; color: var(--doc-text-main); opacity: 0.9; }

        .tutorial-image { width: 100%; max-width: 600px; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); margin: 15px 0; }

        /* 移动端适配按钮 */
        .mobile-toggle { display: none; position: fixed; bottom: 20px; right: 20px; width: 50px; height: 50px; border-radius: 50%; background: var(--doc-primary); color: white; border: none; box-shadow: 0 4px 12px rgba(0,0,0,0.2); z-index: 200; align-items: center; justify-content: center; cursor: pointer; }

        /* =========================================
           2. 交互演示区样式 (Playground)
           ========================================= */
        .playground {
            display: flex;
            background: var(--doc-sidebar-bg);
            border: 1px solid var(--doc-border);
            border-radius: 16px;
            overflow: hidden;
            margin: 30px 0;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            min-height: 500px; 
        }

        /* 左侧控制器 */
        .pg-controls {
            width: 320px;
            background: var(--doc-sidebar-bg);
            border-right: 1px solid var(--doc-border);
            padding: 25px;
            overflow-y: auto;
        }

        .control-group { margin-bottom: 20px; }
        .control-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--doc-text-light); margin-bottom: 8px; }
        .control-group input[type="text"],
        .control-group input[type="color"],
        .control-group textarea,
        .control-group select {
            width: 100%; padding: 10px; border: 1px solid var(--doc-border); border-radius: 8px; font-size: 0.9rem; transition: border 0.2s;
            background-color: var(--doc-bg); color: var(--doc-text-main);
        }
        .control-group input:focus, .control-group select:focus { outline: none; border-color: var(--doc-primary); }
        .control-group input[type="range"] { width: 100%; cursor: pointer; }

        /* 右侧预览舞台 */
        .pg-stage {
            flex: 1;
            background-color: var(--bg-preview-page);
            background-image: radial-gradient(var(--doc-border) 1px, transparent 1px);
            background-size: 20px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px;
            position: relative;
            transition: background-color 0.3s ease;
        }
        
        .pg-stage::before {
            content: 'PREVIEW';
            position: absolute;
            top: 15px; right: 20px;
            font-size: 0.7rem; font-weight: 800; color: var(--doc-text-light); opacity: 0.5; letter-spacing: 2px;
        }
        
        /* 实战演练交互区样式 */
        .interactive-demo {
            border: 2px dashed var(--doc-border);
            border-radius: 12px;
            padding: 20px;
            background: var(--doc-bg);
            margin-top: 30px;
        }
        .interactive-demo h3 {
            text-align: center;
            margin-top: 0;
            color: var(--doc-text-light);
            font-size: 1rem;
        }
        .demo-card-container {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 450px;
            margin: 0 auto;
        }
        .demo-card-container .preview-card {
            cursor: grab;
            transition: box-shadow 0.2s;
        }
        .demo-card-container .preview-card:active {
            cursor: grabbing;
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
        }
        .sortable-ghost {
            opacity: 0.4;
            background: var(--doc-primary);
            border-radius: var(--g-comp-border-radius);
        }


        /* =========================================
           3. Blokko 组件复刻样式 (为了在文档中正确渲染)
           ========================================= */
        
        .preview-wrapper {
            width: 100%;
            max-width: 400px;
            position: relative;
        }

        .preview-card {
            background: var(--bg-card);
            border-radius: var(--g-comp-border-radius);
            box-shadow: var(--shadow-light);
            padding: 20px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            word-wrap: break-word;
        }
        .preview-card[data-writing-mode="vertical-rl"] {
             writing-mode: vertical-rl;
             text-orientation: mixed;
             height: 300px;
        }

        /* 通用 */
        .text-card-title, .music-title, .showcase-title, .rpg-title { font-weight: 700; color: var(--text-primary); }
        .text-card-content, .music-artist, .showcase-meta, .showcase-comment { color: var(--text-secondary); }

        /* 文字卡片 */
        .text-card-title { font-size: 1.1rem; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
        .text-card-content { font-size: 0.95rem; line-height: 1.6; white-space: pre-wrap; }
        
        /* 图片卡片 */
        .image-card-preview figure { margin: 0; }
        .image-card-preview img { width: 100%; display: block; border-radius: 8px; }
        .image-card-preview figcaption { text-align: center; margin-top: 10px; font-size: 0.9rem; }

        /* 按钮链接 */
.button-card-preview .preview-button {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    font-weight: 600;
    text-decoration: none; 
    border-radius: var(--g-comp-border-radius);
    background: var(--color-primary);
    color: white;
    transition: all 0.2s ease;
    word-break: break-all; /* 防止长文本溢出 */
}
.button-card-preview .preview-button:hover {
    transform: scale(1.03); /* 增加悬浮效果 */
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.button-card-preview .preview-button .iconify {
    font-size: 1.2em;
    margin-right: 10px;
}        .button-card-preview .preview-button .iconify { font-size: 1.2em; margin-right: 10px; }
        
        /* --- 音乐卡片样式 (从 2.1.0.html 移植) --- */
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
        .music-card-preview { display: flex; gap: 15px; align-items: center; }
        .music-cover { width: 80px; height: 80px; border-radius: 8px; object-fit: cover; box-shadow: 0 4px 8px rgba(0,0,0,0.1); flex-shrink: 0;}
        .music-info { flex: 1; min-width: 0; }
        .music-title { font-size: 1.1rem; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .music-artist { font-size: 0.85rem; }
        .music-progress { height: 4px; background: var(--doc-border); border-radius: 2px; margin-top: 10px; overflow: hidden; }
        .music-bar { height: 100%; background: var(--color-primary); width: 0%; border-radius: 2px; }

        .music-card-vinyl { flex-direction: column; align-items: center; gap: 15px; padding: 25px; }
        .music-card-vinyl .music-info { text-align: center; gap: 5px; }
        .vinyl-player { position: relative; width: 120px; aspect-ratio: 1 / 1; flex-shrink: 0; }
        .vinyl-record { width: 100%; height: 100%; border-radius: 50%; background-color: #111; background-image: repeating-radial-gradient(circle at center, #333, #333 1px, #111 1px, #111 3px); display: flex; align-items: center; justify-content: center; box-shadow: 0 0 15px rgba(0,0,0,0.5), inset 0 0 5px rgba(255,255,255,0.1); animation: spin 8s linear infinite; }
        .vinyl-label { width: 45%; height: 45%; border-radius: 50%; object-fit: cover; border: 1px solid #555; background-color: #fff; }
        .vinyl-tonearm { position: absolute; top: -10px; right: -10px; width: 75px; height: 6px; background-color: #d1d5db; border-radius: 3px; transform-origin: 90% 50%; transform: rotate(-35deg); z-index: 20; box-shadow: 1px 2px 4px rgba(0,0,0,0.2); pointer-events: none; }
        .vinyl-tonearm::before { content: ''; position: absolute; left: -2px; top: -3px; width: 14px; height: 12px; background-color: #374151; border-radius: 2px; transform: rotate(25deg); box-shadow: 1px 1px 2px rgba(0,0,0,0.3); }
        .vinyl-tonearm::after { content: ''; position: absolute; right: -6px; top: -6px; width: 18px; height: 18px; background: radial-gradient(circle, #f3f4f6 40%, #9ca3af 100%); border-radius: 50%; border: 2px solid #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
        
        .music-card-cassette { font-family: "栗壳坚坚体", "LikeJianJianTi", "LikeJianJianTi Regular", cursive; background: #e3e0d1; color: #222; padding: 15px; border: 1px solid #999; border-bottom: 12px solid #b0ad9e; border-radius: 6px; }
        .cassette-header { background: #fffdf5; padding: 6px 10px; border-radius: 2px; margin-bottom: 12px; box-shadow: 0 1px 2px rgba(0,0,0,0.15); display: flex; justify-content: space-between; align-items: center; border: 1px solid #d4d4d4; }
        .cassette-spools { display: flex; justify-content: center; align-items: center; gap: 25px; background: #222; padding: 8px; border-radius: 30px; margin-bottom: 5px; border: 2px solid #555; box-shadow: inset 0 2px 5px rgba(0,0,0,0.5); }
        .spool { width: 36px; height: 36px; background: radial-gradient(circle, #eee 3px, transparent 4px), conic-gradient(#fff 0deg, #fff 45deg, #333 45deg, #333 90deg, #fff 90deg, #fff 135deg, #333 135deg, #333 180deg, #fff 180deg, #fff 225deg, #333 225deg, #333 270deg, #fff 270deg, #fff 315deg, #333 315deg, #333 360deg); border-radius: 50%; border: 4px solid #5c4033; animation: spin 4s linear infinite; box-shadow: 0 0 2px rgba(0,0,0,0.5); }
        .cassette-tape-window { height: 4px; background: #3e2723; flex-grow: 1; margin: 0 5px; opacity: 0.8; }
        /* --- 音乐卡片样式结束 --- */
        
        /* 进度条 */
        .progress-bar-preview { display: flex; flex-direction: column; gap: 8px; }
        .progress-bar-header { display: flex; justify-content: space-between; font-size: 0.9rem; color: var(--text-primary); }
        .progress-bar-label { font-weight: 600; }
        .progress-bar-value { font-family: monospace; }
        .progress-bar-track { width: 100%; height: 12px; background: var(--doc-bg); border-radius: 6px; overflow: hidden; }
        .progress-bar-fill { height: 100%; border-radius: 6px; transition: width 0.4s ease, background-color 0.3s; }

        /* 时间轴 */
        .timeline-preview { position: relative; padding: 10px 10px 10px 30px; }
        .timeline-line { position: absolute; left: 10px; top: 10px; bottom: 10px; width: 2px; background-color: var(--doc-border); }
        .timeline-event { position: relative; margin-bottom: 20px; }
        .timeline-event:last-child { margin-bottom: 0; }
        .timeline-dot { position: absolute; left: -24px; top: 5px; width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--g-theme-accent); background: var(--doc-sidebar-bg); }
        .timeline-time { font-size: 0.8rem; font-weight: 600; margin-bottom: 4px; }
        .timeline-content { font-size: 0.95rem; color: var(--text-primary); }

        /* 书影音 */
        .showcase-card { display: flex; align-items: flex-start; gap: 15px; transition: all 0.3s ease; }
        .showcase-cover { width: 100px; height: 140px; object-fit: cover; border-radius: 6px; box-shadow: 0 4px 12px rgba(0,0,0,0.15); flex-shrink: 0; transition: all 0.3s ease;}
        .showcase-info { flex: 1; }
        .showcase-title { font-size: 1.2rem; margin-bottom: 4px; }
        .showcase-meta { font-size: 0.8rem; margin-bottom: 8px; }
        .showcase-rating { color: #ffb400; font-size: 1rem; margin-bottom: 8px; }
        .showcase-comment { font-size: 0.9rem; border-left: 3px solid var(--doc-border); padding-left: 10px; font-style: italic; }
        
        /* RPG 卡片 */
        .rpg-card-preview { display: flex; flex-direction: column; align-items: center; padding: 10px; }
        .rpg-title { font-size: 1.2rem; margin-bottom: 15px; transition: all 0.3s ease;}
        .rpg-radar-container { width: 220px; height: 220px; position: relative; }
        .rpg-radar-container svg { width: 100%; height: 100%; overflow: visible; }
        .preview-card[data-rpg-style="p5"] { background: #000; border: 2px solid #fff; color: #fff; transform: rotate(-1deg); }
        .preview-card[data-rpg-style="p5"] .rpg-title { background: #fff; color: #000; padding: 2px 10px; transform: skewX(-10deg); box-shadow: 2px 2px 0 #d30d19; }
        .preview-card[data-rpg-style="p5"] .radar-area { fill: rgba(211, 13, 25, 0.85); stroke: #fff; stroke-width: 2; }
        .preview-card[data-rpg-style="p5"] .radar-grid, body.dark-mode .preview-card[data-rpg-style="p3r"] .radar-grid { stroke: #666; stroke-dasharray: 4 2; }
        .preview-card[data-rpg-style="p3r"] { background: linear-gradient(160deg, #eefbfc 0%, #c4e9fa 100%); color: #002B4D; }
        .preview-card[data-rpg-style="p3r"] .rpg-title { border-bottom: 2px solid #00B7F6; padding-bottom: 5px; color: #0056b3; }
        .preview-card[data-rpg-style="p3r"] .radar-area { fill: rgba(0, 183, 246, 0.4); stroke: #00B7F6; stroke-width: 2;}
        .preview-card[data-rpg-style="p3r"] .radar-grid { stroke: rgba(0, 183, 246, 0.3); }

        /* 分隔符 */
        .separator-preview { display: flex; align-items: center; gap: 15px; width: 100%; padding: 20px 0; }
        .separator-line { flex: 1; height: 1px; background: var(--doc-border); }
        .separator-text { font-size: 0.85rem; font-weight: 600; }
        
        /* 留白 */
        .spacer-preview { width: 100%; border: 2px dashed var(--doc-border); border-radius: 8px; background: var(--doc-code-bg); transition: height 0.3s ease; display:flex; align-items:center; justify-content:center; }
        .spacer-preview-label { text-align: center; color: var(--doc-text-light); font-family: monospace; font-size: 0.9rem; }

        /* 高级边框演示专用样式 (已修正) */
        #adv-border-card.neo-brutalism {
            border: 2px solid var(--adv-border-color);
            box-shadow: var(--adv-border-offset) var(--adv-border-offset) 0 var(--adv-border-color);
        }
        #adv-border-card.pixel {
            box-shadow: 
                var(--adv-border-offset) 0 0 0 var(--adv-border-color),
                calc(-1 * var(--adv-border-offset)) 0 0 0 var(--adv-border-color),
                0 var(--adv-border-offset) 0 0 var(--adv-border-color),
                0 calc(-1 * var(--adv-border-offset)) 0 0 var(--adv-border-color);
        }
        #adv-border-card.double-offset {
            position: relative; /* 关键改动1：为伪元素提供定位上下文 */
    border: 2px solid var(--adv-border-color);
}
#adv-border-card.double-offset::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border: 2px solid var(--adv-border-color);
    border-radius: inherit;
    transform: translate(var(--adv-border-offset), var(--adv-border-offset));
    z-index: -1; /* 关键改动2：将伪元素置于卡片内容之下 */
    opacity: 0.6;
}

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .doc-sidebar { position: fixed; transform: translateX(-100%); height: 100%; box-shadow: 2px 0 10px rgba(0,0,0,0.1); }
            .doc-sidebar.open { transform: translateX(0); }
            .doc-main { padding: 20px; }
            .mobile-toggle { display: flex; }
            .playground { flex-direction: column; height: auto; }
            .pg-controls { width: 100%; border-right: none; border-bottom: 1px solid var(--doc-border); max-height: 40vh; }
            .pg-stage { padding: 30px 20px; min-height: 400px; }
        }