/* ===== 全局 ===== */
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f6f8;
}

/* ===== 主容器 ===== */
.app {
    padding: 16px;
}

/* ===== 顶部 ===== */
.topbar {
    margin-bottom: 20px;
}

.title {
    font-size: 26px;
    font-weight: bold;
}

.subtitle {
    font-size: 14px;
    color: #888;
    margin-top: 4px;
}

/* ===== 列表 ===== */
.list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ===== 卡片 ===== */
.card {
    display: flex;
    justify-content: space-between;
    align-items: center;

    background: white;
    padding: 14px 16px;

    border-radius: 14px;

    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.left {
    font-size: 16px;
}

.right {
    font-size: 16px;
    font-weight: bold;
    color: #ff3b30;
}

/* ===== 悬浮按钮 ===== */
.fab {
    position: fixed;
    right: 20px;
    bottom: 20px;

    width: 56px;
    height: 56px;

    border-radius: 50%;

    background: #007aff;
    color: white;

    display: flex;
    justify-content: center;
    align-items: center;

    font-size: 28px;

    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}