로그인 시도하면 login.php로 넘어가는 문제

<!-- 오른쪽 로그인 영역 -->
            <ul class="hd_login">
                <?php if ($is_member) {  ?>
                <li><a href="<?php echo G5_BBS_URL ?>/member_confirm.php?url=<?php echo G5_BBS_URL ?>/register_form.php">정보수정</a></li>
                <li><a href="<?php echo G5_BBS_URL ?>/logout.php">로그아웃</a></li>
                <?php if ($is_admin) {  ?>
                <li><a href="<?php echo correct_goto_url(G5_ADMIN_URL); ?>">관리자</a></li>
                <?php }  ?>
                <?php } else {  ?>
                <li class="hd_login_drop">
                    <a href="#" id="btn-login-drop">로그인</a>
                    <div class="login-dropdown" id="login-dropdown">
                        <form name="foutlogin" id="foutlogin"
                            action="<?php echo G5_BBS_URL ?>/login.php"
                            method="post"
                            autocomplete="off">
                            <input type="hidden" name="url" value="<?php echo htmlspecialchars($_SERVER['REQUEST_URI']); ?>">
                            <input type="text"     name="mb_id"       placeholder="아이디 또는 이메일" required maxlength="20">
                            <input type="password" name="mb_password" placeholder="비밀번호"           required maxlength="20">
                            <div class="auto-login">
                                <label><input type="checkbox" name="auto_login" value="1"> 자동 로그인</label>
                            </div>
                            <button type="submit" class="drop-submit-btn">로그인</button>
                        </form>
                        <div class="login-drop-footer">
                            <a href="<?php echo G5_BBS_URL ?>/register.php">회원가입</a>
                            <a href="<?php echo G5_BBS_URL ?>/password_lost.php">비밀번호 찾기</a>
                        </div>
                    </div>
                </li>
                <li><a href="<?php echo G5_BBS_URL ?>/register.php">회원가입</a></li>
                <?php }  ?>
            </ul>

<script>
$(function() {
    var $drop = $('#login-dropdown');
    var $btn  = $('#btn-login-drop');
    // 버튼 클릭: 토글
    $btn.on('click', function(e) {
        e.preventDefault();
        e.stopPropagation();
        $drop.toggleClass('show');
    });
    // 드롭다운 내부 클릭은 닫히지 않도록
    $drop.on('click', function(e) {
        e.stopPropagation();
    });
    // 외부 클릭 시 닫기
    $(document).on('click', function() {
        $drop.removeClass('show');
    });
});
</script>

/* 오른쪽 로그인 영역 */
.hd_login {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 20px;
    font-size: 0.98rem;
    font-weight: 500;
}
.hd_login li a {
    color: #555;
    text-decoration: none;
    padding: 6px 12px;
    transition: all 0.3s ease;
    border-radius: 4px;
}
.hd_login li a:hover {
    color: #3a8afd;
    background: rgba(58, 138, 253, 0.08);
}
#gnb.scrolled .hd_login li a { color: #444; }
/* 서브메뉴 화살표나 bg 같은 불필요 요소 제거 */
.gnb_1dli .bg { display: none; }
/* 빈 메뉴 메시지 */
.gnb_wrap .gnb_empty {
    color: #999;
    font-size: 0.95rem;
}

/* ====================== 로그인 드롭다운 ====================== */
/* 로그인 li — 드롭다운 기준점 */
.hd_login_drop {
    position: relative;
}
/* 드롭다운 패널 */
.login-dropdown {
    display: none;
    position: fixed;          /* gnb가 fixed이므로 fixed 사용 */
    top: 80px;                /* gnb 높이와 동일 */
    right: calc((100% - 1200px) / 2 + 20px); /* gnb_wrap 오른쪽 정렬 */
    width: 320px;
    background: #fff;
    border: 1px solid #eee;
    border-top: 2px solid #3a8afd;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
    padding: 28px 28px 22px;
    z-index: 99999;
    animation: dropDown 0.2s ease;
}
@keyframes dropDown {
    0%   { opacity: 0; transform: translateY(-8px); }
    100% { opacity: 1; transform: translateY(0); }
}
.hd_login_drop:hover .login-dropdown,
.login-dropdown.show { display: block; }
/* 드롭다운 내부 입력 */
.login-dropdown input[type="text"],
.login-dropdown input[type="password"] {
    display: block;
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.97rem;
    margin-bottom: 10px;
    outline: none;
    transition: border 0.2s;
}
.login-dropdown input[type="text"]:focus,
.login-dropdown input[type="password"]:focus {
    border-color: #3a8afd;
    box-shadow: 0 0 0 3px rgba(58,138,253,0.12);
}
/* 자동 로그인 */
.login-dropdown .auto-login {
    margin: 4px 0 16px;
    font-size: 0.9rem;
    color: #666;
}
/* 로그인 제출 버튼 */
.login-dropdown .drop-submit-btn {
    display: block;
    width: 100%;
    height: 46px;
    background: #3a8afd;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.login-dropdown .drop-submit-btn:hover { background: #2375eb; }
/* 하단 링크 */
.login-drop-footer {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin-top: 16px;
    font-size: 0.88rem;
}
.login-drop-footer a {
    color: #888;
    text-decoration: none;
    transition: color 0.2s;
}
.login-drop-footer a:hover { color: #3a8afd; }