* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

a{
    color: #E0E0E0;
    text-decoration: none;
}
a:hover{
    color: #2D2D2D;
}

/* 白天主题 */
.theme-light {
    background: #ffffff;
    color: #1a1a1a;
}

.theme-light .container {
    background: #ffffff;
}

.theme-light .qr-container {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
}

.theme-light .qr-code {
    background: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.theme-light .payment-btn {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    color: #495057;
}

.theme-light .payment-btn:hover {
    background: #e9ecef;
}

.theme-light .payment-btn.active {
    background: #007bff;
    color: white;
    border-color: #007bff;
}

.theme-light .instructions {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    color: #495057;
}

.theme-light .instructions h3 {
    color: #212529;
}

.theme-light .theme-toggle {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    color: #495057;
}

/* 暗夜主题 */
.theme-dark {
    background: #121212;
    color: #e0e0e0;
}

.theme-dark .container {
    background: #1e1e1e;
}

.theme-dark .qr-container {
    background: #2d2d2d;
    border: 1px solid #3a3a3a;
}

.theme-dark .qr-code {
    background: #252525;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.theme-dark .payment-btn {
    background: #2d2d2d;
    border: 1px solid #3a3a3a;
    color: #e0e0e0;
}

.theme-dark .payment-btn:hover {
    background: #3a3a3a;
}

.theme-dark .payment-btn.active {
    background: #0d6efd;
    color: white;
    border-color: #0d6efd;
}

.theme-dark .instructions {
    background: #2d2d2d;
    border: 1px solid #3a3a3a;
    color: #b0b0b0;
}

.theme-dark .instructions h3 {
    color: #ffffff;
}

.theme-dark .theme-toggle {
    background: #2d2d2d;
    border: 1px solid #3a3a3a;
    color: #e0e0e0;
}

.container {
    max-width: 600px;
    width: 100%;
    text-align: center;
    padding: 40px 30px;
    border-radius: 20px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 16px;
    margin-bottom: 40px;
    font-weight: 400;
}

.qr-container {
    border-radius: 16px;
    padding: 24px;
    margin: 0 auto 32px;
    display: inline-block;
}

.qr-code {
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}

.qr-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.payment-options {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.payment-btn {
    border-radius: 12px;
    padding: 12px 20px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.payment-btn:hover {
    transform: translateY(-2px);
}

.instructions {
    border-radius: 12px;
    padding: 20px;
    text-align: left;
    font-size: 14px;
}

.instructions h3 {
    font-size: 16px;
    margin-bottom: 12px;
    font-weight: 600;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    border-radius: 12px;
    padding: 8px 16px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 500;
    z-index: 10;
}

.copy{
    margin:0;
    padding-top: 1em;
    font-size: 13px;
}

@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
    }

    h1 {
        font-size: 24px;
    }

    .qr-code {
        width: 180px;
        height: 180px;
    }

    .payment-options {
        gap: 12px;
    }

    .payment-btn {
        padding: 10px 16px;
        font-size: 13px;
    }

    .theme-toggle {
        top: 15px;
        right: 15px;
        padding: 6px 12px;
        font-size: 12px;
    }
}