/* 全站 TG 购买图片弹窗：独立命名，避免影响原网站样式 */
.tg-purchase-overlay {
    position: fixed;
    inset: 0;
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 28px;
    box-sizing: border-box;
    background: rgba(12, 20, 35, 0.76);
}
.tg-purchase-overlay.is-visible { display: flex; }
.tg-purchase-dialog {
    width: 100%;
    max-width: 680px;
    position: relative;
    box-sizing: border-box;
}
.tg-purchase-link { display: block; line-height: 0; }
.tg-purchase-image {
    display: block;
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 18px 70px rgba(0, 0, 0, 0.3);
}
.tg-purchase-close {
    position: absolute;
    top: -17px;
    right: -17px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 2px solid white;
    border-radius: 50%;
    color: white;
    background: #182235;
    font: 30px/1 Arial, sans-serif;
    cursor: pointer;
}
.tg-purchase-close:hover { background: #3456a4; }
@media (max-width: 600px) {
    .tg-purchase-overlay { padding: 20px; }
    .tg-purchase-dialog { max-width: 100%; }
    .tg-purchase-close { top: -15px; right: -13px; }
}