* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --color-primary:  rgba(255,255,255,0.5);
}
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    padding: 40px 20px;
    min-height: 100vh;
}

.editor-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    background:var(--color-primary);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

/* 工具栏 - 使用现代CSS */
.toolbar {
    background:var(--color-primary);
    border-bottom: 2px solid #e9ecef;
    padding: 12px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.toolbar-group {
    display: flex;
    gap: 4px;
    padding: 0 8px;
    border-right: 1px solid #dee2e6;
}

.toolbar-group:last-child {
    border-right: none;
}

.btn {
    background:var(--color-primary);
    border: 1px solid #dee2e6;
    padding: 8px 14px;
    cursor: pointer;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    color: #495057;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn:hover {
    background:var(--color-primary);
    border-color: #adb5bd;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn.active {
    background: #667eea;
    border-color: #667eea;
    color: white;
}

select, input[type="file"] {
    padding: 8px 12px;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    font-size: 14px;
    background:var(--color-primary);
    cursor: pointer;
}

/* 编辑区域 - 使用 contenteditable */
.editor-content {
    min-height: 500px;
    padding: 40px 48px;
    outline: none;
    background:var(--color-primary);
    font-size: 16px;
    line-height: 1.6;
    color: #212529;
    transition: all 0.2s;
}

.editor-content:focus {
    box-shadow: inset 0 0 0 2px rgba(102,126,234,0.1);
}

/* 文章内样式 */
.editor-content h1 {
    font-size: 2em;
    margin: 0.67em 0;
    font-weight: 700;
}
.editor-content h2 {
    font-size: 1.5em;
    margin: 0.83em 0;
}
.editor-content p {
    margin: 1em 0;
}
.editor-content img, .editor-content video {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 16px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.editor-content blockquote {
    border-left: 4px solid #667eea;
    padding-left: 20px;
    margin: 1em 0;
    color: #6c757d;
    font-style: italic;
}

/* 状态栏 */
.status-bar {
    background:var(--color-primary);
    border-top: 1px solid #e9ecef;
    padding: 10px 20px;
    font-size: 12px;
    color: #6c757d;
    display: flex;
    justify-content: space-between;
}

/* 响应式 */
@media (max-width: 768px) {
    .toolbar { padding: 10px; }
    .btn { padding: 6px 10px; font-size: 12px; }
    .editor-content { padding: 20px; }
}