v1.10.1: 支付成功即显示卡密 + 已支付未发卡的明确状态

- 订单状态区新增「你的卡密」展示区，拿到 card_key 立刻显示（不等激活结果）
- 自动激活失败时给出手动激活路径（卡密+侧边栏步骤+订单号）
- paid 但无卡密时显示发卡进度，90s 后提示权益不丢失可凭订单号补发
- 卡密一键复制（clipboard API → execCommand 降级）

buy.css

@@ -126,6 +126,76 @@ h2 {
 .order-status.error { color: #c62828; background: #fdecea; }
 .order-status.success { color: #1b5e20; background: #eef7ee; }
 
+/* 卡密展示区：支付成功后必须让用户亲眼看到卡密 */
+.card-box {
+    margin-top: 14px;
+    border: 2px dashed #00a1d6;
+    border-radius: 10px;
+    background: #f2fbff;
+    padding: 16px 14px;
+    word-break: break-all;
+}
+
+.cb-title {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    font-size: 14px;
+    font-weight: 700;
+    color: #0089ba;
+    margin-bottom: 10px;
+}
+
+.cb-dot {
+    width: 8px;
+    height: 8px;
+    border-radius: 50%;
+    background: #00a1d6;
+    flex: none;
+    box-shadow: 0 0 0 4px rgba(0, 161, 214, 0.18);
+}
+
+.cb-key {
+    background: #fff;
+    border: 1px solid #cdeaf7;
+    border-radius: 8px;
+    padding: 14px 12px;
+    text-align: center;
+    margin-bottom: 12px;
+}
+
+.cb-key code {
+    font-family: "SF Mono", Consolas, "Courier New", monospace;
+    font-size: 20px;
+    font-weight: 700;
+    letter-spacing: 2px;
+    color: #111;
+    user-select: all;
+}
+
+.cb-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
+
+.cb-copy {
+    padding: 9px 22px;
+    border: none;
+    border-radius: 6px;
+    background: #00a1d6;
+    color: #fff;
+    font-size: 14px;
+    cursor: pointer;
+    transition: background 0.18s ease;
+}
+
+.cb-copy:hover { background: #0089ba; }
+.cb-tip { font-size: 12px; color: #0089ba; }
+
+.cb-hint {
+    margin-top: 10px;
+    font-size: 12px;
+    line-height: 1.7;
+    color: #7a7f86;
+}
+
 .ok-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
 .ok-line { font-size: 13px; margin-bottom: 4px; }
 .ok-line b { color: #1b5e20; }