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

/* SVG 图标 */
.icon {
    width: 1.6em; height: 1.6em;
    vertical-align: -0.2em;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
}

body {
    background: #0b1120;
    font-family: 'Segoe UI', Roboto, system-ui, sans-serif;
    color: #f1f5f9;
    height: 100vh;              /* 全屏高度 */
    display: flex;
    flex-direction: column;
    overflow: hidden;           /* 禁止 body 滚动 */
    padding: 0;                 /* 移除外边距，交给内部容器 */
}

a {
    color: #fbbf24;
    text-decoration: none;
}

/* 主容器，占据所有剩余空间并添加内边距 */
.board {
    flex: 1;
    padding: 2rem 3rem;
    overflow: hidden;           /* 防止内部溢出 */
    display: flex;
    flex-direction: column;
}