body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    font-family: 'Helvetica Neue', sans-serif;
    overflow: hidden;
    color: #fff;
}

#art-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#ui-layer {
    position: absolute;
    z-index: 10;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;
    background: linear-gradient(to top, #000 0%, transparent 100%);
}

h1 { font-size: 1rem; letter-spacing: 3px; opacity: 0.8; margin: 0; text-align: center; }
header p { text-align: center; font-size: 0.7rem; color: #888; margin-top: 5px; }

#content-area {
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-bottom: 20px;
}

#poetic-text {
    font-size: 1.1rem;
    color: #fff;
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
    font-style: italic;
}

#input-area { display: flex; gap: 10px; margin-bottom: 20px; }
input {
    flex: 1; background: rgba(255,255,255,0.1); border: 1px solid #444;
    padding: 12px; color: white; border-radius: 4px; outline: none;
}
button {
    background: #fff; color: #000; border: none; padding: 0 20px;
    font-weight: bold; cursor: pointer; border-radius: 4px;
}

/* --- 弹窗样式 --- */
.hidden { display: none !important; }

#pay-modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.95); z-index: 100;
    display: flex; align-items: center; justify-content: center;
    backdrop-filter: blur(10px);
}

.modal-content {
    background: #111; border: 1px solid #333; padding: 30px;
    border-radius: 10px; text-align: center; width: 85%; max-width: 350px;
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.1);
}

.modal-content h2 { margin-top: 0; color: #d4af37; /* 香槟金 */ }
.desc span { color: #d4af37; font-weight: bold; font-size: 1.2rem; }
.qr-container img { width: 180px; border-radius: 5px; margin: 15px 0; border: 2px solid #fff; }

.instruction { text-align: left; font-size: 0.85rem; color: #aaa; margin-bottom: 20px; line-height: 1.6; }
.highlight { color: #fff; font-weight: bold; border-bottom: 1px dashed #666; }

.verify-area { display: flex; gap: 5px; }
#activation-code { text-align: center; letter-spacing: 2px; border-color: #d4af37; }
#verify-btn { background: #d4af37; color: #000; }
#error-msg { color: #ff4444; font-size: 0.8rem; margin-top: 10px; min-height: 1em; }
```