/* BC 站点公共样式 (2026-08-03 统一) */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #f5f5f5; font-family: Arial, "Microsoft YaHei", sans-serif; }

/* 顶部栏 */
.header { background: #2c3e50; color: white; padding: 15px 30px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.header a { color: white; text-decoration: none; margin-left: 20px; }
.header a:hover { text-decoration: underline; }

/* 卡片容器 */
.container { width: 400px; max-width: 94%; margin: 50px auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,0.1); }
.title { text-align: center; margin-bottom: 20px; color: #2c3e50; }

/* 表单 */
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; color: #555; }
.form-group input { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; }
.form-group input:focus { outline: none; border-color: #3498db; }

/* 按钮（默认中性色，各页可内联覆盖） */
.btn { width: 100%; padding: 10px; background: #3498db; color: white; border: none; border-radius: 4px; cursor: pointer; }
.btn:hover { background: #2980b9; }

/* 提示/错误 */
.msg { text-align: center; margin-bottom: 15px; color: #2ecc71; }
.error { color: red; }

/* 链接组 / 小字提示 */
.link-group { text-align: center; margin-top: 15px; }
.link-group a { color: #3498db; text-decoration: none; margin: 0 5px; }
.link-group a:hover { text-decoration: underline; }
.tip { text-align: center; margin-top: 10px; color: #999; font-size: 12px; }

/* 验证码 */
.captcha-row { display: flex; gap: 10px; align-items: center; }
.captcha-row img { height: 40px; cursor: pointer; border: 1px solid #ddd; border-radius: 4px; }

/* 移动端 */
@media (max-width: 480px) {
    .header { padding: 12px 15px; }
    .container { margin: 30px auto; padding: 20px; }
}