body {
    background-color: #F8F8F8;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
.custom-header {
    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-left: 0.9375rem;
    padding-right: 0.9375rem;
    box-sizing: content-box;
    z-index: 100;
}
.header-placeholder {
    height: calc(2.75rem + var(--status-bar-height));
}
.back-icon {
    width: 1.25rem;
    height: 1.25rem;
}
.header-title {
    font-size: 0.875rem;
    font-weight: bold;
    color: #333;
}
.header-right {
    width: 1.25rem;
}
.container {
    padding: 0.9375rem;
}
.bank-card {
    background: linear-gradient(135deg, #E53935, #C62828);
    border-radius: 0.625rem;
    padding: 1.25rem;
    color: #fff;
    margin-bottom: 1.875rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0.3125rem 0.9375rem rgba(229, 57, 53, 0.3);
}
.card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.875rem;
    position: relative;
    z-index: 2;
}
.bank-info {
    display: flex;
    align-items: center;
}
.bank-icon-circle {
    width: 1.875rem;
    height: 1.875rem;
    background-color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.625rem;
}
.bank-icon-text {
    color: #C62828;
    font-weight: bold;
    font-size: 1rem;
}
.bank-name {
    font-size: 1rem;
    font-weight: bold;
}
.card-type {
    font-size: 0.75rem;
    border: 1px solid rgba(255,255,255,0.6);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
}
.card-number {
    font-size: 1.5rem;
    font-family: monospace;
    letter-spacing: 0.125rem;
    position: relative;
    z-index: 2;
    text-shadow: 0 0.0625rem 0.125rem rgba(0,0,0,0.2);
}
.card-bg-circle {
    position: absolute;
    top: -1.5625rem;
    right: -1.5625rem;
    width: 9.375rem;
    height: 9.375rem;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    z-index: 1;
}
.action-btn {
    background-color: #FF5722;
    color: #fff;
    font-size: 1rem;
    border-radius: 1.375rem;
    height: 2.75rem;
    line-height: 2.75rem;
    margin-bottom: 0.9375rem;
}
.security-tip {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: #999;
}
.shield-icon {
    width: 0.75rem;
    height: 0.75rem;
    margin-right: 0.3125rem;
}