/* 消息面板 - 全屏悬浮 */
.messenger__overlay { padding: 20px; box-sizing: border-box; padding: 20px; box-sizing: border-box;
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0,0,0,0.35); z-index: 10001;
    display: flex; align-items: flex-end; justify-content: flex-end;
    visibility: hidden; opacity: 0; transition: opacity 0.25s ease, visibility 0.25s ease;
}
.messenger__overlay.active { visibility: visible; opacity: 1; }

.messenger__panel {
    width: 480px; max-width: 92vw; height: calc(100vh - 40px); max-height: 85vh;
    background: #fff; border-radius: 16px; box-shadow: 0 8px 40px rgba(0,0,0,0.18);
    display: flex; flex-direction: column; overflow: hidden;
}

.messenger__header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 20px; border-bottom: 1px solid #f0f2f5;
    background: #fafbfc;
}
.messenger__title { font-size: 17px; font-weight: 700; color: #1a1a1a; margin: 0; }
.messenger__actions { display: flex; gap: 10px; align-items: center; }
.messenger__mark-read { font-size: 12px; color: #0f4c81; cursor: pointer; border: none; background: none; }
.messenger__close { background: none; border: none; font-size: 22px; cursor: pointer; color: #888; }

.messenger__list { flex: 1; overflow-y: auto; padding: 10px 0; }
.messenger__item { display: flex; gap: 12px; padding: 12px 20px; cursor: pointer; transition: background 0.15s; border-bottom: 1px solid #f5f5f5; }
.messenger__item:hover { background: #f8faff; }
.messenger__item--unread { background: #fef9e7; }
.messenger__item-icon { font-size: 22px; width: 36px; text-align: center; flex-shrink: 0; }
.messenger__item-body { flex: 1; min-width: 0; }
.messenger__item-title { font-size: 14px; font-weight: 600; color: #1a1a1a; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.messenger__item-summary { font-size: 12px; color: #888; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.messenger__item-meta { font-size: 11px; color: #aaa; margin-top: 4px; display: flex; align-items: center; gap: 6px; }
.messenger__item-unread-dot { width: 6px; height: 6px; border-radius: 50%; background: #e74c3c; }

.messenger__footer { padding: 12px 16px; border-top: 1px solid #f0f2f5; background: #fff; }
.messenger__input-wrap { display: flex; gap: 8px; align-items: center; }
.messenger__input { flex: 1; padding: 10px 14px; border: 1px solid #dde1e6; border-radius: 10px; font-size: 14px; }
.messenger__attach-btn { background: none; border: 1px solid #dde1e6; border-radius: 8px; padding: 8px 12px; cursor: pointer; font-size: 16px; }
.messenger__send-btn { background: #0f4c81; color: #fff; border: none; border-radius: 10px; padding: 10px 18px; cursor: pointer; font-weight: 500; }
.messenger__send-btn:hover { background: #0a3560; }
.messenger__file-preview { margin-top: 6px; font-size: 12px; color: #555; display: flex; align-items: center; gap: 6px; }

.messenger__empty { text-align: center; padding: 40px; color: #aaa; }

/* 登录提示卡片 */
.messenger-login-card {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    z-index: 10010; background: #fff; border-radius: 14px; padding: 30px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.25); text-align: center;
    max-width: 360px; width: 90%;
}
.messenger-login-card__close { position: absolute; top: 8px; right: 12px; cursor: pointer; font-size: 20px; color: #aaa; }
.messenger-login-card__icon { font-size: 40px; margin-bottom: 10px; }
.messenger-login-card__text { font-size: 14px; color: #555; margin-bottom: 16px; }
.messenger-login-card__btn { background: #0f4c81; color: #fff; border: none; padding: 10px 28px; border-radius: 8px; cursor: pointer; font-size: 14px; }
/* 左右分栏 */
.messenger__body { display: flex; flex: 1; overflow: hidden; }
.messenger__sidebar { width: 180px; border-right: 1px solid #f0f2f5; display: flex; flex-direction: column; }
.messenger__sidebar-header { padding: 12px 14px; font-size: 13px; font-weight: 600; color: #5a6377; border-bottom: 1px solid #f0f2f5; }
.messenger__conversation-list { flex: 1; overflow-y: auto; }
.messenger__conversation-item { display: flex; gap: 10px; padding: 10px 14px; cursor: pointer; border-bottom: 1px solid #f5f5f5; transition: background 0.15s; align-items: center; }
.messenger__conversation-item:hover { background: #f8faff; }
.messenger__conversation-item.active { background: #e8f0fe; }
.messenger__conversation-avatar { width: 32px; height: 32px; border-radius: 50%; background: #0f4c81; color: #fff; text-align: center; line-height: 32px; font-size: 14px; font-weight: 600; flex-shrink: 0; }
.messenger__conversation-info { flex: 1; min-width: 0; }
.messenger__conversation-name { font-size: 13px; font-weight: 500; color: #1a1a1a; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.messenger__conversation-last-msg { font-size: 11px; color: #888; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.messenger__conversation-time { font-size: 10px; color: #aaa; flex-shrink: 0; }
.messenger__chat { flex: 1; display: flex; flex-direction: column; }
.messenger__chat-header { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-bottom: 1px solid #f0f2f5; font-size: 14px; font-weight: 600; }
.messenger__back-btn { background: none; border: none; font-size: 16px; cursor: pointer; color: #0f4c81; }
.messenger__chat-placeholder { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #aaa; }
.messenger__chat-placeholder-icon { font-size: 40px; margin-bottom: 8px; }
.messenger__message-list { flex: 1; overflow-y: auto; padding: 10px 14px; }
.messenger__message-item { margin-bottom: 10px; }
.messenger__message-bubble { display: inline-block; background: #f0f4fa; padding: 8px 12px; border-radius: 10px; max-width: 80%; }
.messenger__message-content { font-size: 13px; color: #1a1a1a; }
.messenger__message-time { font-size: 10px; color: #aaa; margin-top: 4px; }
.messenger__chat-footer { border-top: 1px solid #f0f2f5; padding: 10px 14px; }