body {
    background-color: #F5F6FA;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2.75rem;
    padding-top: var(--status-bar-height);
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0.9375rem;
    box-sizing: border-box;
    z-index: 100;
}
.nav-placeholder {
    height: calc(2.75rem + var(--status-bar-height));
}
.back-icon {
    width: 1.25rem;
    height: 1.25rem;
}
.nav-title {
    font-size: 1.0625rem;
    font-weight: bold;
    color: #333;
}
.nav-right { width: 1.25rem;
}
.sys-msg-list {
    padding: 0.625rem 0.9375rem;
}
.date-label {
    text-align: center;
    font-size: 0.75rem;
    color: #ccc;
    margin: 0.9375rem 0 0.625rem; /* Increased top margin */
}
.sys-card {
    background-color: #fff;
    border-radius: 0.5rem;
    padding: 0.9375rem;
    margin-bottom: 0.625rem;
    box-shadow: 0 0.0625rem 0.25rem rgba(0,0,0,0.02);
}
.sys-header {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}
.sys-title {
    font-size: 0.875rem;
    font-weight: bold;
    color: #333;
}
.red-dot {
    width: 0.3125rem;
    height: 0.3125rem;
    background-color: #FF3B30;
    border-radius: 50%;
    margin-left: 0.3125rem;
}
.sys-content {
    margin-bottom: 0.75rem;
}
.sys-text {
    font-size: 0.8125rem;
    color: #666;
    line-height: 1.6;
}
.sys-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 0.03125rem solid #f5f5f5;
    padding-top: 0.625rem;
}
.sys-time {
    font-size: 0.75rem;
    color: #999;
}
.check-more {
    display: flex;
    align-items: center;
    font-size: 0.75rem;
    color: #999;
}
.arrow-icon-small {
    width: 0.625rem;
    height: 0.625rem;
    margin-left: 0.125rem;
    opacity: 0.5;
}